修离线缓存

Window1.xaml.cs

@@ -1,5 +1,7 @@
 using AnotherReplayReader.Utils;
 using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 using System.Net;
 using System.Threading.Tasks;
@@ -20,16 +22,21 @@ namespace AnotherReplayReader
         {
             InitializeComponent();
             _identity = identity;
-            Refresh();
+            Refresh(true);
         }
 
-        private async void Refresh()
+        private async void Refresh(bool showCached)
         {
             _setIPButton.IsEnabled = false;
             try
             {
-                _dataGrid.Items.Clear();
-                _dataGrid.Items.Add(new IpAndPlayer { Ip = 0, Id = "正在加载..." });
+                var loading = new IpAndPlayer[] { new() { Ip = 0, Id = "正在加载..." } };
+                _dataGrid.ItemsSource = loading;
+                if (showCached)
+                {
+                    await Display();
+                    _dataGrid.ItemsSource = loading.Concat(_dataGrid.ItemsSource.Cast<IpAndPlayer>());
+                }
                 await _identity.Fetch();
                 await Display();
             }
@@ -45,10 +52,10 @@ namespace AnotherReplayReader
 
         private async Task Display(string filter = "", string nameFilter = "")
         {
-            var newList = await Task.Run(() =>
+            var result = await Task.Run(() =>
             {
                 var pinyin = nameFilter.ToPinyin();
-                return _identity
+                var query = _identity
                     .AsSortedList()
                     .Where(x =>
                     {
@@ -61,13 +68,10 @@ namespace AnotherReplayReader
                             return true;
                         }
                         return x.Id.ContainsIgnoreCase(nameFilter);
-                    })
-                    .ToArray();
+                    });
+                return new ObservableCollection<IpAndPlayer>(query);
             });
-
-            _dataGrid.Items.Clear();
-            _dataGrid.ItemsSource = newList;
-            _dataGrid.Items.Refresh();
+            _dataGrid.ItemsSource = result;
         }
 
         private async void OnClick(object sender, RoutedEventArgs e)
@@ -97,7 +101,7 @@ namespace AnotherReplayReader
                     MessageBox.Show(this, "设置 IP 表失败");
                 }
 
-                Refresh();
+                Refresh(false);
             }
             catch (Exception exception)
             {