diff --git a/AssetEntry.cs b/AssetEntry.cs
index 7bf75f5..e504547 100644
--- a/AssetEntry.cs
+++ b/AssetEntry.cs
@@ -12,6 +12,9 @@ namespace HashCalculator.GUI
         public IEnumerable<string> DisplayLabels { get; }
         public uint Hash => SageHash.CalculateLowercaseHash(Name);
 
+        public string IdString => $"{Type}:{Name}";
+        public string HashString => $"{Hash:0X} ({Hash})";
+
         public AssetEntry(XElement element)
         {
             if (element == null)
@@ -26,12 +29,7 @@ namespace HashCalculator.GUI
 
             Type = element.Name.LocalName;
             var id = element.Attribute("id")?.Value;
-            if (id == null)
-            {
-                throw new NotSupportedException();
-            }
-
-            Name = id;
+            Name = id ?? throw new NotSupportedException();
 
             var labels = from name in element.Elements(ModXml.EalaAsset + "DisplayName")
                          select name.Value;
diff --git a/Command.cs b/Command.cs
new file mode 100644
index 0000000..209ce4e
--- /dev/null
+++ b/Command.cs
@@ -0,0 +1,131 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Input;
+
+namespace HashCalculator.GUI
+{
+    internal class Command<T> : ICommand
+    {
+        private readonly Func<T, Task> _action;
+        private readonly Action<Exception> _onAsyncException;
+        private bool _canExecute = true;
+
+        public bool CanExecuteValue 
+        { 
+            get => _canExecute;
+            set
+            {
+                _canExecute = value;
+                CanExecuteChanged?.Invoke(this, new EventArgs());
+            }
+        }
+
+        public event EventHandler? CanExecuteChanged;
+
+        public Command(Func<T, Task> action, Action<Exception>? onAsyncException = null)
+        {
+            _action = action;
+            _onAsyncException = onAsyncException ?? (exception => 
+            {
+                MessageBox.Show($"Unhandled async exception in {nameof(Command<T>)}: {exception}");
+                Application.Current.Shutdown(1);
+            });
+        }
+
+        public bool CanExecute(object parameter)
+        {
+            return _canExecute;
+        }
+
+        [SuppressMessage("Globalization", "CA1303:请不要将文本作为本地化参数传递", Justification = "<挂起>")]
+        public void Execute(object parameter)
+        {
+            if (!_canExecute)
+            {
+                return;
+            }
+            if(!(parameter is T typed))
+            {
+                throw new ArgumentException($"{nameof(parameter)} wrong type");
+            }
+
+            ExecuteTaskInternal(ExecuteTask(typed));
+        }
+
+        public Task ExecuteTask(T parameter) => _action(parameter);
+
+        [SuppressMessage("Design", "CA1031:不捕获常规异常类型", Justification = "<挂起>")]
+        private async void ExecuteTaskInternal(Task task)
+        {
+            try
+            {
+                await task.ConfigureAwait(true);
+            }
+            catch (Exception exception)
+            {
+                _onAsyncException(exception);
+            }
+        }
+    }
+
+    internal class Command : ICommand
+    {
+        private readonly Func<Task> _action;
+        private readonly Action<Exception> _onAsyncException;
+        private bool _canExecute = true;
+
+        public bool CanExecuteValue
+        {
+            get => _canExecute;
+            set
+            {
+                _canExecute = value;
+                CanExecuteChanged?.Invoke(this, new EventArgs());
+            }
+        }
+
+        public event EventHandler? CanExecuteChanged;
+
+        public Command(Func<Task> action, Action<Exception>? onAsyncException = null)
+        {
+            _action = action;
+            _onAsyncException = onAsyncException ?? (exception =>
+            {
+                MessageBox.Show($"Unhandled async exception in {nameof(Command)}: {exception}");
+                Application.Current.Shutdown(1);
+            });
+        }
+
+        public bool CanExecute(object parameter)
+        {
+            return _canExecute;
+        }
+
+        public void Execute(object parameter)
+        {
+            if (!_canExecute)
+            {
+                return;
+            }
+
+            ExecuteTaskInternal(ExecuteTask());
+        }
+
+        public Task ExecuteTask() => _action();
+
+        [SuppressMessage("Design", "CA1031:不捕获常规异常类型", Justification = "<挂起>")]
+        private async void ExecuteTaskInternal(Task task)
+        {
+            try
+            {
+                await task.ConfigureAwait(true);
+            }
+            catch (Exception exception)
+            {
+                _onAsyncException(exception);
+            }
+        }
+    }
+}
diff --git a/Converters/BooleanInvertConverter.cs b/Converters/BooleanInvertConverter.cs
new file mode 100644
index 0000000..cf6b4a4
--- /dev/null
+++ b/Converters/BooleanInvertConverter.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace HashCalculator.GUI.Converters
+{
+    [ValueConversion(typeof(bool), typeof(bool))]
+    internal class BooleanInvertConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            bool original = (bool)value;
+            return !original;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            bool original = (bool)value;
+            return !original;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Converters/NullToBooleanConverter.cs b/Converters/NullToBooleanConverter.cs
new file mode 100644
index 0000000..9b27cca
--- /dev/null
+++ b/Converters/NullToBooleanConverter.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace HashCalculator.GUI.Converters
+{
+    [ValueConversion(typeof(object), typeof(bool))]
+    public class NullToBooleanConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if(value is null)
+            {
+                return false;
+            }
+            else if(value is string s)
+            {
+                return !string.IsNullOrEmpty(s);
+            }
+            return true;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}
diff --git a/Converters/ValidInputEntryTypeToBooleanConverter.cs b/Converters/ValidInputEntryTypeToBooleanConverter.cs
new file mode 100644
index 0000000..2dc5785
--- /dev/null
+++ b/Converters/ValidInputEntryTypeToBooleanConverter.cs
@@ -0,0 +1,21 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace HashCalculator.GUI.Converters
+{
+    [ValueConversion(typeof(InputEntry), typeof(bool))]
+    internal class ValidInputEntryTypeToBooleanConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            var entry = value as InputEntry;
+            return entry?.IsValid == true;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}
\ No newline at end of file
diff --git a/NullToVisibilityConverter.cs b/Converters/ValueConverterAggregate.cs
similarity index 55%
rename from NullToVisibilityConverter.cs
rename to Converters/ValueConverterAggregate.cs
index a2c2976..ac1afcf 100644
--- a/NullToVisibilityConverter.cs
+++ b/Converters/ValueConverterAggregate.cs
@@ -1,17 +1,16 @@
 using System;
+using System.Collections.Generic;
 using System.Globalization;
-using System.Windows;
+using System.Linq;
 using System.Windows.Data;
 
-namespace HashCalculator.GUI
+namespace HashCalculator.GUI.Converters
 {
-    [ValueConversion(typeof(string), typeof(Visibility))]
-    public class NullToVisibilityConverter : IValueConverter
+    internal class ValueConverterAggregate : List<IValueConverter>, IValueConverter
     {
         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            var text = value as string;
-            return string.IsNullOrEmpty(text) ? Visibility.Visible : Visibility.Collapsed;
+            return this.Aggregate(value, (current, converter) => converter.Convert(current, targetType, parameter, culture));
         }
 
         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
diff --git a/CopyableBox.xaml b/CopyableBox.xaml
new file mode 100644
index 0000000..c2044cc
--- /dev/null
+++ b/CopyableBox.xaml
@@ -0,0 +1,50 @@
+<Window 
+    x:Class="HashCalculator.GUI.CopyableBox"
+    x:Name="Self"
+    x:ClassModifier="internal"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:local="clr-namespace:HashCalculator.GUI"
+    mc:Ignorable="d"
+    Title="CopyableBox" Height="350" Width="600"
+    Closing="ClosingHandler"
+>
+    <Window.DataContext>
+        <local:CopyableBoxViewModel />
+    </Window.DataContext>
+    <Grid Margin="20">
+        <Grid.RowDefinitions>
+            <RowDefinition />
+            <RowDefinition Height="60"/>
+        </Grid.RowDefinitions>
+        <Button 
+            Content="复制所有内容" 
+            Command="{Binding CopyCommand}"
+            Grid.Row="1"
+            Margin="10,0,0,10" 
+            Width="120" 
+            Height="30" 
+            HorizontalAlignment="Left" 
+            VerticalAlignment="Bottom"
+        />
+        <Button 
+            Content="{Binding CloseButtonText}" 
+            Command="{Binding CloseCommand}"
+            CommandParameter="{Binding ElementName=Self}"
+            Margin="0,0,10,10" 
+            Grid.Row="1" 
+            Width="100" 
+            Height="30" 
+            HorizontalAlignment="Right" 
+            VerticalAlignment="Bottom" 
+        />
+        <TextBox 
+            Grid.Row="0"
+            Text="{Binding Text, Mode=OneWay}"
+            IsReadOnly="True"
+            TextWrapping="Wrap"
+        />
+    </Grid>
+</Window>
diff --git a/CopyableBox.xaml.cs b/CopyableBox.xaml.cs
new file mode 100644
index 0000000..a5c0595
--- /dev/null
+++ b/CopyableBox.xaml.cs
@@ -0,0 +1,166 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Shapes;
+using System.Windows.Threading;
+using TechnologyAssembler.Core.Extensions;
+
+namespace HashCalculator.GUI
+{
+    /// <summary>
+    /// CopyableBox.xaml 的交互逻辑
+    /// </summary>
+    [SuppressMessage("Microsoft.Performance", "CA1812")]
+    internal partial class CopyableBox : Window, IDisposable
+    {
+        private CopyableBoxViewModel ViewModel => (CopyableBoxViewModel)DataContext;
+
+        public static void ShowDialog(Func<CancellationToken, Task<string>> action)
+        {
+            using var box = new CopyableBox();
+            box.ViewModel.Initialize(action, box.Dispatcher);
+            box.ShowDialog();
+        }
+
+        private CopyableBox()
+        {
+            InitializeComponent();
+        }
+
+        public void Dispose()
+        {
+            ViewModel.Dispose();
+        }
+
+        private void ClosingHandler(object sender, CancelEventArgs e)
+        {
+            if (ViewModel.ReadyToClose)
+            {
+                return;
+            }
+
+            e.Cancel = true;
+            if (ViewModel.CloseCommand.CanExecuteValue)
+            {
+                ViewModel.CloseCommand.Execute(this);
+            }
+
+            return;
+        }
+    }
+
+    [SuppressMessage("Microsoft.Performance", "CA1812")]
+    internal class CopyableBoxViewModel : NotifyPropertyChanged, IDisposable
+    {
+        private readonly CancellationTokenSource _cancellationTokenSource = new CancellationTokenSource();
+        private Task? _task;
+
+        public const string InitialMessage = "正在加载…… 关闭窗口就可以取消加载（";
+
+        private string _text = InitialMessage;
+        public string Text
+        {
+            get => _text;
+            private set => SetField(ref _text, value);
+        }
+
+        public string CloseButtonText => CloseCommand.CanExecuteValue ? "关闭窗口" : "正在关闭…";
+        private bool _readyToClose = false;
+        public bool ReadyToClose
+        {
+            get => _readyToClose;
+            private set => SetField(ref _readyToClose, value);
+        }
+
+        public Command CopyCommand { get; }
+        public Command<CopyableBox> CloseCommand { get; }
+
+        public CopyableBoxViewModel()
+        {
+            CopyCommand = new Command(() =>
+            {
+                Clipboard.SetText(Text);
+                return Task.CompletedTask;
+            });
+
+            CloseCommand = new Command<CopyableBox>(async window =>
+            {
+                CloseCommand.CanExecuteValue = false;
+                Notify(nameof(CloseButtonText));
+
+                if (_task != null)
+                {
+                    try
+                    {
+                        Cancel();
+                        await _task.ConfigureAwait(true);
+                    }
+                    catch (OperationCanceledException) { }
+                }
+
+                ReadyToClose = true;
+                window.Close();   
+            });
+        }
+
+        public void Dispose()
+        {
+            Cancel();
+            _cancellationTokenSource.Dispose();
+        }
+
+        public void Initialize(Func<CancellationToken, Task<string>> action, Dispatcher dispatcher)
+        {
+            _task = InitializationTask(action, dispatcher);
+        }
+
+        private async Task InitializationTask(Func<CancellationToken, Task<string>> action, Dispatcher dispatcher)
+        {
+            var utcBegin = DateTimeOffset.UtcNow;
+            var timer = new DispatcherTimer(TimeSpan.FromMilliseconds(200), DispatcherPriority.Normal, (s, e) =>
+            {
+                var timeElapsed = DateTimeOffset.UtcNow - utcBegin;
+                if (((DispatcherTimer)s).IsEnabled && timeElapsed.TotalSeconds > 1)
+                {
+                    Text = Text = $"{InitialMessage}\r\n目前耗时{timeElapsed}，稍微再等一下吧233";
+                }
+            }, dispatcher);
+            timer.Start();
+
+            var token = _cancellationTokenSource.Token;
+            async Task<string> Action()
+            {
+                try
+                {
+                    return await action(token).ConfigureAwait(false);
+                }
+                catch (OperationCanceledException)
+                {
+                    return "操作已被取消";
+                }
+                finally
+                {
+                    timer.Stop();
+                }
+            }
+            Text = await dispatcher.Invoke(Action).ConfigureAwait(true);
+        }
+
+        private void Cancel()
+        {
+            _cancellationTokenSource.Cancel();
+        }
+    }
+}
diff --git a/FileSystemSuggestions.cs b/FileSystemSuggestions.cs
index 3d504ea..5910a65 100644
--- a/FileSystemSuggestions.cs
+++ b/FileSystemSuggestions.cs
@@ -30,6 +30,11 @@ namespace HashCalculator.GUI
 
             path = Environment.ExpandEnvironmentVariables(path);
 
+            if (path.IndexOfAny(Path.GetInvalidPathChars()) != -1)
+            {
+                return empty;
+            }
+
             _search.Update(path);
 
             if (!_search.IsValidPath)
@@ -37,7 +42,7 @@ namespace HashCalculator.GUI
                 return empty;
             }
 
-            var currentFiles = empty;
+            var currentFiles = new List<InputEntry>();
             string? fileName;
             string? currentFullPath;
             try
@@ -46,13 +51,12 @@ namespace HashCalculator.GUI
                 fileName = Path.GetFileName(path);
                 if (File.Exists(currentFullPath))
                 {
-
                     var type = CheckExtension(currentFullPath);
-                    if (type.HasValue)
+                    if(type is InputEntryType entryType)
                     {
-                        currentFiles.Append(new InputEntry(type.Value, path, currentFullPath));
+                        currentFiles.Add(new InputEntry(entryType, path, currentFullPath));
                     }
-                    currentFiles.Append(new InputEntry(InputEntryType.BinaryFile, path, currentFullPath));
+                    currentFiles.Add(new InputEntry(InputEntryType.BinaryFile, path, currentFullPath));
                 }
             }
             catch
@@ -60,34 +64,31 @@ namespace HashCalculator.GUI
                 return empty;
             }
 
-            var directories = from directory in _search.AllDirectories
-                              where directory.Name.StartsWith(fileName, StringComparison.OrdinalIgnoreCase)
-                              select new InputEntry(InputEntryType.Path, _search.GetInputStyleName(directory), directory.FullName);
-
-            var otherFiles = from file in _search.AllFiles
-                             where file.Name.StartsWith(fileName, StringComparison.OrdinalIgnoreCase)
-                             where file.FullName != currentFullPath
-                             select file;
-
-            var supportedFiles = empty;
+            var alternatives = empty;
             try
             {
-                supportedFiles = from file in otherFiles
-                                 let type = CheckExtension(file.Extension)
-                                 where type.HasValue
-                                 select new InputEntry(type.Value, _search.GetInputStyleName(file), file.FullName);
+                var directories = from directory in _search.AllDirectories
+                                  where directory.Name.StartsWith(fileName, StringComparison.OrdinalIgnoreCase)
+                                  select new InputEntry(InputEntryType.Path, _search.GetInputStyleName(directory), directory.FullName);
+
+                var otherFiles = from file in _search.AllFiles
+                                 where file.Name.StartsWith(fileName, StringComparison.OrdinalIgnoreCase)
+                                 where file.FullName != currentFullPath
+                                 select file;
+
+                var supportedFiles = from file in otherFiles
+                                     let type = CheckExtension(file.Extension)
+                                     where type.HasValue
+                                     select new InputEntry(type.Value, _search.GetInputStyleName(file), file.FullName);
+
+                var binaryFiles = from file in otherFiles
+                                  select new InputEntry(InputEntryType.BinaryFile, _search.GetInputStyleName(file), file.FullName);
+
+                alternatives = supportedFiles.Concat(directories).Concat(binaryFiles).ToArray();
             }
             catch { }
 
-            var binaryFiles = empty;
-            try
-            {
-                binaryFiles = from file in otherFiles
-                              select new InputEntry(InputEntryType.BinaryFile, _search.GetInputStyleName(file), file.FullName);
-            }
-            catch { }
-
-            return currentFiles.Concat(supportedFiles).Concat(directories).Concat(binaryFiles);
+            return currentFiles.Concat(alternatives);
         }
 
         private static InputEntryType? CheckExtension(string path)
@@ -130,6 +131,12 @@ namespace HashCalculator.GUI
             string? newBaseDirectory = null;
             try
             {
+                if (Path.GetFileName(path).IndexOfAny(Path.GetInvalidFileNameChars()) != -1)
+                {
+                    _inputBaseDirectory = null;
+                    return;
+                }
+
                 newBaseDirectory = Path.GetDirectoryName(path);
                 var rootDirectory = Path.GetPathRoot(path);
                 if(string.IsNullOrEmpty(newBaseDirectory) && !string.IsNullOrEmpty(rootDirectory))
diff --git a/HashCalculator.GUI.csproj b/HashCalculator.GUI.csproj
index a26be0d..6004613 100644
--- a/HashCalculator.GUI.csproj
+++ b/HashCalculator.GUI.csproj
@@ -21,6 +21,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <Reference Include="System.Windows.Presentation" />
     <Reference Include="TechnologyAssembler.Core">
       <HintPath>TechnologyAssembler.Core.dll</HintPath>
       <Private>true</Private>
diff --git a/InputBar.xaml b/InputBar.xaml
index b1aadcd..02027dd 100644
--- a/InputBar.xaml
+++ b/InputBar.xaml
@@ -5,13 +5,18 @@
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
     xmlns:local="clr-namespace:HashCalculator.GUI"
+    xmlns:c="clr-namespace:HashCalculator.GUI.Converters"
     mc:Ignorable="d" 
     x:ClassModifier="internal"
     x:Name="_this"
     d:DesignHeight="100" d:DesignWidth="800"
 >
     <UserControl.Resources>
-        <local:NullToVisibilityConverter x:Key="NullToVisibilityConverter" />
+        <c:ValueConverterAggregate x:Key="NullToVisibilityConverter">
+            <c:NullToBooleanConverter />
+            <c:BooleanInvertConverter />
+            <BooleanToVisibilityConverter />
+        </c:ValueConverterAggregate>
         <Style 
             x:Key="BlankListBoxContainerStyle" 
             TargetType="{x:Type ListBoxItem}"
@@ -72,7 +77,6 @@
                 PreviewKeyDown="OnPreviewKeyDown"
                 Padding="2, 0"
                 VerticalContentAlignment="Center"
-                TextChanged="OnTextChanged"
                 LostFocus="OnLostFocus"
             />
             <TextBlock 
@@ -98,14 +102,28 @@
                                       RelativeSource={RelativeSource AncestorType=local:InputBar}}"
                 SelectionMode="Single"
                 SelectionChanged="OnSelectionChanged"
+                SelectedItem="{Binding Path=SelectedItem,
+                                       RelativeSource={RelativeSource AncestorType=local:InputBar}}"
+                SelectedIndex="{Binding Path=SelectedIndex,
+                                        RelativeSource={RelativeSource AncestorType=local:InputBar}}"
                 VirtualizingPanel.IsVirtualizing="True"
                 VirtualizingPanel.VirtualizationMode="Recycling"
             >
                 <ListBox.ItemTemplate>
                     <DataTemplate>
                         <StackPanel Orientation="Vertical">
-                            <TextBlock Text="{Binding Text}" FontWeight="Bold"></TextBlock>
-                            <TextBlock Text="{Binding Type}"></TextBlock>
+                            <TextBlock Text="{Binding Text}"></TextBlock>
+                            <StackPanel 
+                                Orientation="Horizontal"
+                            >
+                                <StackPanel.Resources>
+                                    <Style TargetType="TextBlock">
+                                        <Setter Property="Foreground" Value="Gray" />
+                                    </Style>
+                                </StackPanel.Resources>
+                                <TextBlock Text="{Binding Type}"></TextBlock>
+                                <TextBlock Text="{Binding Details}" Margin="10,0,0,0"></TextBlock>
+                            </StackPanel>
                         </StackPanel>
                     </DataTemplate>
                 </ListBox.ItemTemplate>
diff --git a/InputBar.xaml.cs b/InputBar.xaml.cs
index 9486a26..db68112 100644
--- a/InputBar.xaml.cs
+++ b/InputBar.xaml.cs
@@ -82,7 +82,22 @@ namespace HashCalculator.GUI
             set => SetValue(SelectedItemProperty, value);
         }
 
-        public event TextChangedEventHandler? TextChanged;
+        public static readonly DependencyProperty SelectedIndexProperty =
+            DependencyProperty.Register(nameof(SelectedIndex), typeof(int), typeof(InputBar), new FrameworkPropertyMetadata
+            {
+                BindsTwoWayByDefault = true,
+                DefaultUpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged,
+                CoerceValueCallback = (d, baseObject) =>
+                {
+                    var self = (InputBar)d;
+                    return self.NormalizeIndex((int)baseObject);
+                }
+            });
+        public int SelectedIndex
+        {
+            get => (int)GetValue(SelectedIndexProperty);
+            set => SetValue(SelectedIndexProperty, value);
+        }
 
         public InputBar()
         {
@@ -94,12 +109,12 @@ namespace HashCalculator.GUI
             switch (e.Key)
             {
                 case Key.Down:
-                    ListBox.SelectedIndex = NormalizeIndex(ListBox.SelectedIndex + 1);
+                    SelectedIndex += 1;
                     ListBox.ScrollIntoView(ListBox.SelectedItem);
                     DropDown.IsOpen = true;
                     break;
                 case Key.Up:
-                    ListBox.SelectedIndex = NormalizeIndex(ListBox.SelectedIndex - 1);
+                    SelectedIndex -= 1;
                     ListBox.ScrollIntoView(ListBox.SelectedItem);
                     break;
                 case Key.Escape:
@@ -114,7 +129,6 @@ namespace HashCalculator.GUI
 
         private void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
         {
-            SelectedItem = (InputEntry)ListBox.SelectedItem;
             if (SelectedItem != null)
             {
                 Text = SelectedItem.ToString();
@@ -122,14 +136,6 @@ namespace HashCalculator.GUI
             }
         }
 
-        private void OnTextChanged(object sender, TextChangedEventArgs e)
-        {
-            if (Text != SelectedItem?.ToString())
-            {
-                TextChanged?.Invoke(this, e);
-            }
-        }
-
         private void OnLostFocus(object sender, RoutedEventArgs e)
         {
             DropDown.IsOpen = false;
@@ -145,6 +151,5 @@ namespace HashCalculator.GUI
             return Math.Min(Math.Max(rawIndex, -1), Collection.Count() - 1);
         }
 
-
     }
 }
diff --git a/InputEntry.cs b/InputEntry.cs
index 5cc49e7..0fb2335 100644
--- a/InputEntry.cs
+++ b/InputEntry.cs
@@ -19,9 +19,34 @@ namespace HashCalculator.GUI
 
     internal sealed class InputEntry
     {
+        public static IReadOnlyDictionary<InputEntryType, string> Descriptions = new Dictionary<InputEntryType, string> 
+        {
+            { InputEntryType.BigFile, "可以尝试读取这个 big 文件里的 manifest 文件" },
+            { InputEntryType.BinaryFile, "可以计算这个文件的哈希值" },
+            { InputEntryType.ManifestFile, "可以尝试读取这个 manifest 文件，显示各个素材的哈希值" },
+            { InputEntryType.XmlFile, "可以尝试读取这个XML，显示 XML 里定义的各个素材的哈希值" },
+            { InputEntryType.Path, string.Empty },
+        };
+
         public InputEntryType Type { get; }
         public string Value { get; }
         public string Text { get; }
+        public string Details
+        {
+            get 
+            {
+                if(Type == InputEntryType.Text)
+                {
+                    var hash = SageHash.CalculateLowercaseHash(Value);
+                    var binaryHash = SageHash.CalculateBinaryHash(Value);
+                    return hash == binaryHash 
+                        ? $"这段文字的哈希值：{hash:x8} ({hash})"
+                        : $"这段文字的哈希值：{hash:x8}；大小写敏感哈希值 {binaryHash:x8}";
+                }
+                return Descriptions[Type];
+            }
+        }
+        public bool IsValid => Type != InputEntryType.Text && Type != InputEntryType.Path;
 
         public InputEntry(InputEntryType type, string text, string value)
         {
@@ -34,6 +59,5 @@ namespace HashCalculator.GUI
         {
             return Text;
         }
-
     }
 }
diff --git a/MainWindow.xaml b/MainWindow.xaml
index 9440091..eb0d79a 100644
--- a/MainWindow.xaml
+++ b/MainWindow.xaml
@@ -1,71 +1,228 @@
-<Window x:Class="HashCalculator.GUI.MainWindow"
-        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        xmlns:l="clr-namespace:HashCalculator.GUI"
-        mc:Ignorable="d"
-        Title="Sage FastHash 哈希计算器" Height="600" Width="600">
+<Window 
+    x:Class="HashCalculator.GUI.MainWindow"
+    x:Name="Self"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:l="clr-namespace:HashCalculator.GUI"
+    xmlns:c="clr-namespace:HashCalculator.GUI.Converters"
+    mc:Ignorable="d"
+    Title="Sage FastHash 哈希计算器" Height="600" Width="600"
+    Background="#202020"
+    Foreground="LightGray"
+>
     <Window.Resources>
-        <l:NullToVisibilityConverter x:Key="NullToVisibilityConverter" />
+        <c:ValueConverterAggregate x:Key="ValidInputEntryToVisibilityConverter">
+            <c:ValidInputEntryTypeToBooleanConverter />
+            <BooleanToVisibilityConverter />
+        </c:ValueConverterAggregate>
+        <c:ValueConverterAggregate x:Key="InvalidInputEntryToVisibilityConverter">
+            <c:ValidInputEntryTypeToBooleanConverter />
+            <c:BooleanInvertConverter />
+            <BooleanToVisibilityConverter />
+        </c:ValueConverterAggregate>
+        <Style x:Key="CommonStyle" TargetType="Control">
+            <Setter 
+                Property="Foreground"
+                Value="{Binding Path=(TextElement.Foreground),
+                                RelativeSource={RelativeSource AncestorType={x:Type FrameworkElement}}}"
+            />
+            <Setter 
+                Property="Background"
+                Value="{Binding Path=(TextElement.Background),
+                                RelativeSource={RelativeSource AncestorType={x:Type FrameworkElement}}}"
+            />
+        </Style>
+        <Style 
+            BasedOn="{StaticResource CommonStyle}" 
+            TargetType="{x:Type TextBox}"
+        >
+            <Setter Property="Background" Value="#00000000"/>
+        </Style>
+        <Style 
+            BasedOn="{StaticResource CommonStyle}" 
+            TargetType="{x:Type Button}"
+        >
+            <Setter Property="Background" Value="#20808080"/>
+            <Setter Property="Template">
+                <Setter.Value>
+                    <ControlTemplate TargetType="{x:Type Button}">
+                        <Border x:Name="border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
+                            <ContentPresenter x:Name="contentPresenter" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
+                        </Border>
+                        <ControlTemplate.Triggers>
+                            <Trigger Property="Button.IsDefaulted" Value="True">
+                                <Setter Property="BorderBrush" TargetName="border" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
+                            </Trigger>
+                            <Trigger Property="IsMouseOver" Value="True">
+                                <Setter Property="Background" TargetName="border" Value="#80BEE6FD"/>
+                                <Setter Property="BorderBrush" TargetName="border" Value="#FF3C7FB1"/>
+                            </Trigger>
+                            <Trigger Property="IsPressed" Value="True">
+                                <Setter Property="Background" TargetName="border" Value="#80C4E5F6"/>
+                                <Setter Property="BorderBrush" TargetName="border" Value="#FF2C628B"/>
+                            </Trigger>
+                            <Trigger Property="ToggleButton.IsChecked" Value="True">
+                                <Setter Property="Background" TargetName="border" Value="#FFBCDDEE"/>
+                                <Setter Property="BorderBrush" TargetName="border" Value="#FF245A83"/>
+                            </Trigger>
+                            <Trigger Property="IsEnabled" Value="False">
+                                <Setter Property="Background" TargetName="border" Value="#00000000"/>
+                                <Setter Property="BorderBrush" TargetName="border" Value="#FFADB2B5"/>
+                                <Setter Property="Foreground" Value="#808080"/>
+                            </Trigger>
+                        </ControlTemplate.Triggers>
+                    </ControlTemplate>
+                </Setter.Value>
+            </Setter>
+        </Style>
+        <Style 
+            BasedOn="{StaticResource CommonStyle}" 
+            TargetType="{x:Type DataGrid}"
+        />
+        <Style 
+            BasedOn="{StaticResource CommonStyle}" 
+            TargetType="{x:Type DataGridColumnHeader}"
+        >
+            <Setter Property="Padding" Value="10,5" />
+            <Setter Property="MinWidth" Value="0" />
+            <Setter Property="SnapsToDevicePixels" Value="True" />
+            <Setter Property="Cursor" Value="Hand" />
+            <Setter Property="Background" Value="#343434"/>
+            <Setter Property="Foreground" Value="White"/>
+            <Setter Property="BorderThickness" Value="0, 0, 1, 0"/>
+            <Setter Property="BorderBrush" Value="Gray" />
+        </Style>
+        <Style 
+            BasedOn="{StaticResource CommonStyle}" 
+            TargetType="{x:Type ListBox}"
+        >
+            <Setter Property="Background" Value="#181818"/>
+        </Style>
     </Window.Resources>
-    <Grid Margin="10, 10">
+    <Window.DataContext>
+        <l:ViewModel/>
+    </Window.DataContext>
+    <Grid Margin="10,20,10,10">
         <Grid.RowDefinitions>
             <RowDefinition/>
             <RowDefinition Height="130" />
         </Grid.RowDefinitions>
-        <VirtualizingStackPanel Grid.Row="0">
-            <Grid Height="25">
+        <DockPanel Grid.Row="0">
+            <Grid 
+                DockPanel.Dock="Top"
+                Height="25"
+            >
                 <Grid.ColumnDefinitions>
                     <ColumnDefinition />
                     <ColumnDefinition Width="92"/>
                 </Grid.ColumnDefinitions>
-                <Grid>
-                    <!--<l:InputBox
-                        HintText="Select some big file"
-                        Collection="{Binding Items}"
-                        TextChanged="OnTextChanged"
-                    >
-                    </l:InputBox>-->
-                    <l:InputBar
-                        HintText="Select some big file"
-                        Text="{Binding Text}"
-                        Collection="{Binding Items}"
-                        TextChanged="OnMainInputTextChanged"
-                    />
-                </Grid>
-                <Button x:Name="button" Content="浏览文件" 
-                    Grid.Column="1" Margin="0"
+                <l:InputBar
+                    HintText="输入文本，或 big/manifest/xml 文件路径"
+                    Text="{Binding MainInput.Text}"
+                    Collection="{Binding MainInput.Items}"
+                    SelectedItem="{Binding MainInput.SelectedItem}"
+                    SelectedIndex="{Binding MainInput.SelectedIndex}"
+                    Grid.Column="0"
+                    Margin="0,0,10,0"
+                />
+                <Button 
+                    Content="浏览文件" 
+                    Command="{Binding MainInput.BrowseCommand}"
+                    CommandParameter="{Binding ElementName=Self}"
+                    Visibility="{Binding MainInput.SelectedItem, Converter={StaticResource InvalidInputEntryToVisibilityConverter}}"
+                    Grid.Column="1" 
+                    Margin="0"
+                />
+                <Button 
+                    Content="确认" 
+                    Command="{Binding MainInput.SelectCommand}"
+                    CommandParameter="{Binding}"
+                    Visibility="{Binding MainInput.SelectedItem, Converter={StaticResource ValidInputEntryToVisibilityConverter}}"
+                    Grid.Column="1" 
+                    Margin="0"
+                    Foreground="#20FF30"
+                    BorderBrush="#20FF30"
                 />
             </Grid>
-            <l:InputBar
-                HintText="输入big文件里包含的manifest文件的路径"
-                Collection="{Binding Items}"
-                SelectedItem="{Binding SelectedItem}"
+            <Grid 
+                DockPanel.Dock="Top"
+                Height="25"
                 Margin="0,10,0,0"
-                Height="25" VerticalAlignment="Top"
-            />
+                Visibility="Visible"
+            >
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition />
+                    <ColumnDefinition Width="92"/>
+                </Grid.ColumnDefinitions>
+                <l:InputBar
+                    HintText="输入 big 文件里包含的 manifest 文件的路径"
+                    Collection="{Binding Items}"
+                    SelectedItem="{Binding SelectedItem}"
+                    Grid.Column="0"
+                    Margin="0,0,10,0"
+                />
+                <Button 
+                    Content="确认" 
+                    Grid.Column="1" 
+                    Margin="0"
+                    Foreground="ForestGreen"
+                    BorderBrush="ForestGreen" Template="{DynamicResource ButtonBaseControlTemplate1}"
+                />
+            </Grid>
+            <DockPanel
+                DockPanel.Dock="Top"
+                Height="25"
+                Margin="0,10"
+            >
+                <Button 
+                    DockPanel.Dock="Right"
+                    Content="取消加载" 
+                    Grid.Column="1" 
+                    Width="92"
+                />
+                <Button 
+                    DockPanel.Dock="Right"
+                    Content="加载 csf / mod.str" 
+                    Grid.Column="1" 
+                    Width="140"
+                    Margin="10,0"
+                />
+                <TextBlock
+                    Text="正在加载……"
+                    VerticalAlignment="Center"
+                    Grid.Column="0"
+                />
+            </DockPanel>
             <l:InputBar
                 HintText="过滤Asset ID（可选）"
                 Collection="{Binding Items}"
                 SelectedItem="{Binding SelectedItem}"
-                Margin="0,10,0,0"
-                Height="25" VerticalAlignment="Top"
+                DockPanel.Dock="Top"
+                Height="25" 
             />
             <DataGrid 
                 x:Name="DataGrid"
                 AutoGenerateColumns="False" 
                 ScrollViewer.CanContentScroll="True"
+                VerticalScrollBarVisibility="Auto"
                 EnableRowVirtualization="True"
                 VirtualizingPanel.VirtualizationMode="Recycling"
+                DockPanel.Dock="Top"
             >
                 <DataGrid.Columns>
                     <DataGridTextColumn Header="Asset ID" Width="200" Binding="{Binding AssetId}"/>
                     <DataGridTextColumn Header="哈希" Width="*" Binding="{Binding Hash}"/>
                 </DataGrid.Columns>
             </DataGrid>
-        </VirtualizingStackPanel>
-        <TextBlock x:Name="textBlock" Grid.Row="1" TextWrapping="Wrap">
+        </DockPanel>
+        <TextBlock 
+            x:Name="textBlock" 
+            Grid.Row="1" 
+            Margin="0,10,0,0"
+            TextWrapping="Wrap"
+        >
             本工具基于 <l:ShellLink NavigateUri="https://github.com/Qibbi">Qibbi</l:ShellLink> 提供的 TechnologyAssembler 制作<LineBreak />
             此外使用了 <l:ShellLink NavigateUri="https://github.com/bgrainger">Bradley Grainger</l:ShellLink> 的
             <l:ShellLink NavigateUri="https://github.com/bgrainger/IndexRange">IndexRange</l:ShellLink>
diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index 2e05dff..903b488 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -20,59 +20,28 @@ namespace HashCalculator.GUI
     /// </summary>
     public partial class MainWindow : Window
     {
-        [System.Diagnostics.CodeAnalysis.SuppressMessage("Design", "CA1031:不捕获常规异常类型", Justification = "<挂起>")]
+        internal ViewModel ViewModel => (ViewModel)DataContext;
+
         public MainWindow()
         {
             InitializeComponent();
-            var x = new ModXml(@"D:\Users\lanyi\Desktop\RA3Mods\ARSDK2\Mods\Armor Rush\DATA\mod.xml");
-            var xxx = Enumerable.Repeat(new { AssetId = "正在准备", Hash = "正在准备" }, 1);
-            x.ProcessDocument().ContinueWith(async txx =>
-            {
-                try
-                {
-                    var xx = await txx.ConfigureAwait(true);
-                    if (x.Errors.Any())
-                    {
-                        MessageBox.Show("Errors: \r\n" + x.Errors.Aggregate((x, y) => $"{x}\r\n{y}"));
-                    }
-
-                    Dispatcher.Invoke(() =>
-                    {
-                        DataGrid.ItemsSource = from y in xx
-                                               select new { AssetId = $"{y.Type}:{y.Name}", y.Hash };
-                    });
-                }
-                catch (Exception e)
-                {
-                    Dispatcher.Invoke(() =>
-                    {
-                        DataGrid.ItemsSource = Enumerable.Repeat(new { AssetId = $"错误 {e}", Hash = e.ToString() }, 1);
-                    });
-                }
-            }, TaskScheduler.Default);
-
-            /*_ = Task.Run(async () =>
-              {
-                  var xxx = Enumerable.Repeat(new { AssetId = "正在准备", Hash = "正在准备" }, 1);
-                  await Dispatcher.Invoke(async () =>
-                  {
-                      try
-                      {
-                          var xx = await x.ProcessDocument().ConfigureAwait(true);
-                          DataGrid.ItemsSource = from y in xx
-                                                 select new { AssetId = $"{y.Type}:{y.Name}", y.Hash };
-                      }
-                      catch (Exception e)
-                      {
-                          DataGrid.ItemsSource = Enumerable.Repeat(new { AssetId = $"错误 {e}", Hash = e.ToString() }, 1);
-                      }
-
-                  }).ConfigureAwait(true);
-              });*/
         }
 
         private void OnMainInputTextChanged(object sender, TextChangedEventArgs e)
         {
+            CopyableBox.ShowDialog(async token =>
+            {
+                var init = DateTimeOffset.UtcNow;
+                var i = 0;
+                while (i < 100)
+                {
+                    token.ThrowIfCancellationRequested();
+                    await Task.Delay(100).ConfigureAwait(false);
+                    ++i;
+                }
+                MessageBox.Show("Completed!");
+                return $"Completed after exactly {DateTimeOffset.UtcNow - init}";
+            });
             /*var mainInput = _viewModel.MainInput;
             if (sender is InputBar)
             {
diff --git a/ModManifest.cs b/ModManifest.cs
new file mode 100644
index 0000000..5359939
--- /dev/null
+++ b/ModManifest.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TechnologyAssembler.Core.Assets;
+
+namespace HashCalculator.GUI
+{
+    public class ModManifest
+    {
+        IReadOnlyCollection<AssetEntry> Entries;
+
+        public ModManifest()
+        {
+            var x = Manifest.Load("");
+        }
+    }
+}
diff --git a/Model.cs b/Model.cs
deleted file mode 100644
index 8644695..0000000
--- a/Model.cs
+++ /dev/null
@@ -1,33 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace HashCalculator.GUI
-{
-    internal class Model
-    {
-        private readonly ViewModel _viewModel;
-        private readonly FileSystemSuggestions _suggestions = new FileSystemSuggestions();
-
-        public Model(ViewModel viewModel)
-        {
-            _viewModel = viewModel;
-        }
-
-        public void UpdateMainInputSuggestions()
-        {
-            var mainInput = _viewModel.MainInput;
-            var inputValue = mainInput.Text;
-            if (inputValue != null)
-            {
-                mainInput.Items = _suggestions.ProvideFileSystemSuggestions(inputValue)
-                    .Prepend(new InputEntry(InputEntryType.Text, inputValue, inputValue));
-            }
-        }
-
-
-        
-    }
-}
diff --git a/ViewModel.cs b/ViewModel.cs
index 5f6c71e..82bbe02 100644
--- a/ViewModel.cs
+++ b/ViewModel.cs
@@ -1,10 +1,16 @@
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
+using System.IO;
 using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
+using System.Windows;
+using Microsoft.Win32;
+using TechnologyAssembler.Core.IO;
 
 namespace HashCalculator.GUI
 {
@@ -37,47 +43,305 @@ namespace HashCalculator.GUI
         #endregion
     }
 
+    [SuppressMessage("Microsoft.Performance", "CA1812")]
     internal class ViewModel : NotifyPropertyChanged
     {
-        public InputBarViewModel MainInput { get; } = new InputBarViewModel();
-        public InputBarViewModel BigEntryInput { get; } = new InputBarViewModel();
+        public MainInputViewModel MainInput { get; } = new MainInputViewModel();
+        public BigInputViewModel BigEntryInput { get; } = new BigInputViewModel();
         public InputBarViewModel AssetIdInput { get; } = new InputBarViewModel();
-        public Model Model { get; }
+
+        private Visibility _bigInputVisibility = Visibility.Collapsed;
+        public Visibility BigInputVisibility
+        {
+            get => _bigInputVisibility;
+            set => SetField(ref _bigInputVisibility, value);
+        }
+
+        private InputEntry? _mainInputResult; // if not null
+        private string? _bigManifest;
 
         public ViewModel()
         {
-            Model = new Model(this);
+        }
+
+        [SuppressMessage("Design", "CA1031:不捕获常规异常类型", Justification = "<挂起>")]
+        public async Task OnMainInputDecided(InputEntry selected)
+        {
+            BigInputVisibility = Visibility.Collapsed;
+            switch (selected.Type)
+            {
+                case InputEntryType.BinaryFile:
+                    CopyableBox.ShowDialog(async cancel =>
+                    {
+                        try
+                        {
+                            var hash = await Task.Run(() =>
+                            {
+                                return SageHash.CalculateBinaryHash(File.ReadAllBytes(selected.Value));
+                            }).ConfigureAwait(false);
+                            return $"使用Sage Hash计算出的哈希值：{hash:X8} （十进制 {hash}）\r\n"
+                                + "注意这是以大小写敏感模式计算出的哈希值，与素材ID（大小写不敏感）的哈希其实并不完全一样";
+                        }
+                        catch (Exception exception)
+                        {
+                            return exception.ToString();
+                        }
+                    });
+                    break;
+                case InputEntryType.BigFile:
+                    BigInputVisibility = Visibility.Visible;
+                    throw new NotImplementedException();
+                case InputEntryType.ManifestFile:
+                    await ProcessManifest(selected).ConfigureAwait(true);
+                    break;
+                case InputEntryType.XmlFile:
+                    throw new NotImplementedException();
+                default:
+                    throw new NotSupportedException();
+            }
+        }
+
+        public async Task ProcessManifest(InputEntry entry)
+        {
+            var content = await Task.Run(() =>
+            {
+                using var stream = File.OpenRead(entry.Value);
+                return new ManifestContent(entry.Text, stream);
+            }).ConfigureAwait(true);
+            await ProcessManifest(content).ConfigureAwait(true);
+        }
+
+        public async Task ProcessManifest(ManifestContent content)
+        {
+            throw new NotImplementedException();
         }
     }
 
     internal class InputBarViewModel : NotifyPropertyChanged
     {
         private IEnumerable<InputEntry>? _items;
-        public IEnumerable<InputEntry>? Items
+        public virtual IEnumerable<InputEntry>? Items
         {
             get => _items;
             set => SetField(ref _items, value);
         }
 
-        private InputEntry? selectedItem;
-        public InputEntry? SelectedItem
+        private InputEntry? _selectedItem;
+        public virtual InputEntry? SelectedItem
         {
-            get { return selectedItem; }
-            set { SetField(ref selectedItem, value); }
-        }
-
-        private string? selectedValue;
-        public string? SelectedValue
-        {
-            get { return selectedValue; }
-            set { SetField(ref selectedValue, value); }
+            get => _selectedItem;
+            set => SetField(ref _selectedItem, value);
         }
 
         private string? _text;
-        public string? Text
+        public virtual string? Text
         {
-            get { return _text; }
-            set { SetField(ref _text, value); }
+            get => _text;
+            set => SetField(ref _text, value);
+        }
+    }
+
+    internal class MainInputViewModel : InputBarViewModel
+    {
+        private readonly FileSystemSuggestions _suggestions = new FileSystemSuggestions();
+
+        private int _selectedIndex;
+        public int SelectedIndex
+        {
+            get => _selectedIndex;
+            set
+            {
+                if (value == 0)
+                {
+                    if (Items.Count() <= 1)
+                    {
+                        value = -1;
+                    }
+                    else
+                    {
+                        value = _selectedIndex < value ? 1 : -1;
+                    }
+                }
+                SetField(ref _selectedIndex, value);
+            }
+        }
+
+        public override string? Text
+        {
+            get => base.Text;
+            set
+            {
+                base.Text = value;
+                if (value != SelectedItem?.ToString())
+                {
+                    UpdateList(value);
+                }
+            }
+        }
+
+        public Command<MainWindow> BrowseCommand { get; }
+        public Command<ViewModel> SelectCommand { get; }
+
+        public MainInputViewModel()
+        {
+            Items = Enumerable.Empty<InputEntry>();
+            BrowseCommand = new Command<MainWindow>(window =>
+            {
+                var dialog = new OpenFileDialog
+                {
+                    Multiselect = false,
+                    ValidateNames = true
+                };
+                if (dialog.ShowDialog(window) == true)
+                {
+                    Text = dialog.FileName;
+                }
+                return Task.CompletedTask;
+            });
+            SelectCommand = new Command<ViewModel>(async viewModel =>
+            {
+                if(SelectedItem?.IsValid != true)
+                {
+                    return;
+                }
+
+                try
+                {
+                    BrowseCommand.CanExecuteValue = false;
+                    SelectCommand.CanExecuteValue = false;
+                    await viewModel.OnMainInputDecided(SelectedItem).ConfigureAwait(true);
+                }
+                finally
+                {
+                    BrowseCommand.CanExecuteValue = true;
+                    SelectCommand.CanExecuteValue = true;
+                    SelectedIndex = -1;
+                }
+            });
+        }
+
+        private void UpdateList(string? path)
+        {
+            bool candidateFound = false;
+            var result = _suggestions.ProvideFileSystemSuggestions(path);
+            InputEntry? first = result.FirstOrDefault();
+            if (first != null)
+            {
+                if (new FileInfo(path!).FullName == new FileInfo(first.Value).FullName)
+                {
+                    candidateFound = true;
+                }
+            }
+
+            if (!string.IsNullOrEmpty(path))
+            {
+                result = result.Prepend(new InputEntry(InputEntryType.Text, path!, path!));
+            }
+            Items = result;
+
+            if (candidateFound)
+            {
+                SelectedIndex = 1;
+            }
+        }
+    }
+
+    [SuppressMessage("Design", "CA1001:具有可释放字段的类型应该是可释放的", Justification = "<挂起>")]
+    internal class BigInputViewModel : NotifyPropertyChanged
+    {
+        private CancellationTokenSource? _currentCancellator = null;
+
+        private IEnumerable<ManifestContent>? _manifests;
+        public IEnumerable<ManifestContent>? Manifests
+        {
+            get => _manifests;
+            set => SetField(ref _manifests, value);
+        }
+
+        private ManifestContent? _selectedManifest;
+        public ManifestContent? SelectedManifest
+        {
+            get => _selectedManifest;
+            set
+            {
+                SetField(ref _selectedManifest, value);
+                SelectCommand.CanExecuteValue = value != null;
+            }
+        }
+
+        public Command<ViewModel> SelectCommand { get; }
+
+        public BigInputViewModel()
+        {
+            SelectCommand = new Command<ViewModel>(viewModel => viewModel.ProcessManifest(SelectedManifest!));
+        }
+
+        public async Task LoadBig(string path)
+        {
+            using var cancellator = _currentCancellator = new CancellationTokenSource();
+            var saved = Interlocked.Exchange(ref _currentCancellator, cancellator);
+            saved?.Cancel();
+            
+            var token = cancellator.Token;
+            try
+            {
+                using var big = await Task.Run(() => new BigFile(path), token).ConfigureAwait(true);
+                var manifests = await Task.Run(() =>
+                {
+                    var manifests = big.GetFiles(string.Empty, "*.manifest", VirtualSearchOptionType.AllDirectories);
+                    var modManifests = from manifest in manifests
+                                       where FileNameStartsWith(manifest, "mod")
+                                       select manifest;
+                    var globalDataManifests = from manifest in manifests
+                                              where FileNameStartsWith(manifest, "mapmetadata")
+                                              select manifest;
+                    var firstManifests = modManifests.Concat(globalDataManifests);
+                    var otherManifests = from manifest in manifests
+                                         where !firstManifests.Contains(manifest)
+                                         select manifest;
+
+                    var list = new List<ManifestContent>();
+                    foreach (var path in firstManifests.Concat(otherManifests))
+                    {
+                        token.ThrowIfCancellationRequested();
+                        using var stream = big.OpenStream(path);
+                        list.Add(new ManifestContent(path, stream));
+                    }
+                    return list;
+                }, token).ConfigureAwait(true);
+
+                if (!token.IsCancellationRequested)
+                {
+                    Manifests = manifests;
+                }
+            }
+            catch (OperationCanceledException) { }
+
+            Interlocked.CompareExchange(ref _currentCancellator, null, cancellator);
+        }
+
+        private static bool FileNameStartsWith(string path, string what)
+        {
+            return Path.GetFileName(path).StartsWith(what, StringComparison.OrdinalIgnoreCase);
+        }
+    }
+
+    internal class ManifestContent
+    {
+        public string Name { get; }
+        public byte[] Data { get; }
+
+        public ManifestContent(string name, Stream stream)
+        {
+            Name = name;
+            using var memoryStream = new MemoryStream();
+            stream.CopyTo(memoryStream);
+            Data = memoryStream.ToArray();
+        }
+
+        public override string ToString()
+        {
+            return Name;
         }
     }
 }