refactor: 更改搜索设计

Author: ArgoZhang

src/BootstrapBlazor.Server/Components/Samples/TreeViews.razor

@@ -173,13 +173,13 @@
 <DemoBlock Title="@Localizer["TreeViewShowSearchTitle"]"
            Introduction="@Localizer["TreeViewShowSearchIntro"]"
            Name="ShowSearch">
-    <TreeView TItem="TreeFoo" Items="@SearchItems1" ShowSearch="true" OnSearchAsync="@OnSearch1Async"></TreeView>
+    <TreeView TItem="TreeFoo" Items="@SearchItems1" ShowSearch="true" OnSearchAsync="@OnSearchAsync"></TreeView>
 </DemoBlock>
 
 <DemoBlock Title="@Localizer["TreeViewFixedSearchTitle"]"
            Introduction="@Localizer["TreeViewFixedSearchIntro"]"
            Name="IsFixedSearch">
-    <TreeView TItem="TreeFoo" Items="@SearchItems2" ShowSearch="true" OnSearchAsync="@OnSearch2Async" IsFixedSearch="true" style="height: 180px;"></TreeView>
+    <TreeView TItem="TreeFoo" Items="@SearchItems2" ShowSearch="true" OnSearchAsync="@OnSearchAsync" IsFixedSearch="true" style="height: 180px;"></TreeView>
 </DemoBlock>
 
 <DemoBlock Title="@Localizer["TreeViewMaxSelectedCountTitle"]"

src/BootstrapBlazor.Server/Components/Samples/TreeViews.razor.cs

@@ -230,38 +230,19 @@ private Task SelectedItemOnChanged(SelectedItem selectedItem)
         return ret;
     }
 
-    private Task OnSearch1Async(string searchText)
+    private static async Task<List<TreeViewItem<TreeFoo>>?> OnSearchAsync(string searchText)
     {
-        if (string.IsNullOrEmpty(searchText))
-        {
-            SearchItems1 = TreeFoo.GetTreeItems();
-        }
-        else
-        {
-            SearchItems1 =
-            [
-                new TreeViewItem<TreeFoo>(new TreeFoo() { Text = searchText }) { Text = searchText },
-            ];
-        }
-        StateHasChanged();
-        return Task.CompletedTask;
-    }
+        await Task.Delay(20);
 
-    private Task OnSearch2Async(string searchText)
-    {
-        if (string.IsNullOrEmpty(searchText))
-        {
-            SearchItems1 = TreeFoo.GetTreeItems();
-        }
-        else
+        List<TreeViewItem<TreeFoo>>? items = null;
+        if (!string.IsNullOrEmpty(searchText))
         {
-            SearchItems2 =
+            items =
             [
                 new TreeViewItem<TreeFoo>(new TreeFoo() { Text = searchText }) { Text = searchText },
             ];
         }
-        StateHasChanged();
-        return Task.CompletedTask;
+        return items;
     }
 
     private static async Task<IEnumerable<TreeViewItem<TreeFoo>>> OnExpandVirtualNodeAsync(TreeViewItem<TreeFoo> node)

src/BootstrapBlazor/Components/TreeView/TreeView.razor.cs

@@ -151,7 +151,7 @@ public partial class TreeView<TItem> : IModelEqualityComparer<TItem>
     /// </summary>
     /// <remarks>通过设置 <see cref="ShowSearch"/> 开启</remarks>
     [Parameter]
-    public Func<string?, Task<List<TreeViewItem<TItem>>>>? OnSearchAsync { get; set; }
+    public Func<string?, Task<List<TreeViewItem<TItem>>?>>? OnSearchAsync { get; set; }
 
     /// <summary>
     /// 获得/设置 页面刷新是否重置已加载数据 默认 false
@@ -345,11 +345,6 @@ protected override void OnParametersSet()
         SearchIcon ??= IconTheme.GetIconByKey(ComponentIcons.TreeViewSearchIcon);
         ClearSearchIcon ??= IconTheme.GetIconByKey(ComponentIcons.TreeViewResetSearchIcon);
         LoadingIcon ??= IconTheme.GetIconByKey(ComponentIcons.TreeViewLoadingIcon);
-
-        if (IsReset)
-        {
-            _rows = null;
-        }
     }
 
     /// <summary>
@@ -358,12 +353,7 @@ protected override void OnParametersSet()
     /// <returns></returns>
     protected override async Task OnParametersSetAsync()
     {
-        if (Items == null)
-        {
-            // 未提供数据显示 loading
-            return;
-        }
-
+        Items ??= [];
         if (Items.Count > 0)
         {
             await CheckExpand(Items);