refactor(Select): auto load data on virtual mode (#4852)

* refactor: 修复首次加载问题

* test: 更新单元测试

* chore: bump version 9.1.4

Author: ArgoZhang

src/BootstrapBlazor/BootstrapBlazor.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup>
-    <Version>9.1.3</Version>
+    <Version>9.1.4</Version>
   </PropertyGroup>
 
   <ItemGroup>

src/BootstrapBlazor/Components/Select/Select.razor.cs

@@ -323,6 +323,21 @@ protected override void OnParametersSet()
         SelectedItem = null;
     }
 
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    /// <returns></returns>
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        await base.OnAfterRenderAsync(firstRender);
+
+        if (firstRender)
+        {
+            await RefreshVirtualizeElement();
+            StateHasChanged();
+        }
+    }
+
     /// <summary>
     /// 获得/设置 数据总条目
     /// </summary>
@@ -356,7 +371,12 @@ private async Task SearchTextChanged(string val)
     {
         _itemsCache = null;
         SearchText = val;
-        if (OnQueryAsync != null)
+        await RefreshVirtualizeElement();
+    }
+
+    private async Task RefreshVirtualizeElement()
+    {
+        if (IsVirtualize && OnQueryAsync != null)
         {
             // 通过 ItemProvider 提供数据
             await VirtualizeElement.RefreshDataAsync();

src/BootstrapBlazor/Components/SelectGeneric/SelectGeneric.razor.cs

@@ -346,6 +346,21 @@ protected override void OnParametersSet()
         SelectedItem = null;
     }
 
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    /// <returns></returns>
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        await base.OnAfterRenderAsync(firstRender);
+
+        if (firstRender)
+        {
+            await RefreshVirtualizeElement();
+            StateHasChanged();
+        }
+    }
+
     /// <summary>
     /// 获得/设置 数据总条目
     /// </summary>
@@ -379,8 +394,12 @@ private async Task SearchTextChanged(string val)
     {
         SearchText = val;
         _itemsCache = null;
+        await RefreshVirtualizeElement();
+    }
 
-        if (OnQueryAsync != null)
+    private async Task RefreshVirtualizeElement()
+    {
+        if (IsVirtualize && OnQueryAsync != null)
         {
             // 通过 ItemProvider 提供数据
             await VirtualizeElement.RefreshDataAsync();

test/UnitTest/Components/SelectTest.cs

@@ -773,7 +773,7 @@ public async Task IsVirtualize_BindValue()
         });
 
         var input = cut.Find(".form-select");
-        Assert.Null(input.GetAttribute("value"));
+        Assert.Equal("3", input.GetAttribute("value"));
 
         var select = cut.Instance;
         Assert.Equal("3", select.Value?.Value);