fix(Select): make sure show the right display text (#5806)

* refactor: 重构 DefaultVirtualizeItemText 逻辑

* test: 更新单元测试

* chore: bump version 9.5.6-beta01

Author: ArgoZhang

src/BootstrapBlazor/BootstrapBlazor.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup>
-    <Version>9.5.5</Version>
+    <Version>9.5.6-beta01</Version>
   </PropertyGroup>
 
   <ItemGroup>

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

@@ -156,6 +156,8 @@ public partial class Select<TValue> : ISelect, ILookup
 
     private ItemsProviderResult<SelectedItem> _result;
 
+    private string _defaultVirtualizedItemText = "";
+
     private SelectedItem? SelectedItem { get; set; }
 
     private SelectedItem? SelectedRow
@@ -175,7 +177,7 @@ private SelectedItem? SelectedRow
             return null;
         }
 
-        var item = IsVirtualize ? GetItemByVirtulized() : GetItemByRows();
+        var item = IsVirtualize ? GetItemByVirtualized() : GetItemByRows();
         if (item != null)
         {
             if (_init && DisableItemChangedWhenFirstRender)
@@ -193,7 +195,7 @@ private SelectedItem? SelectedRow
 
     private SelectedItem? GetItemWithEnumValue() => ValueType.IsEnum ? Rows.Find(i => i.Value == Convert.ToInt32(Value).ToString()) : null;
 
-    private SelectedItem GetItemByVirtulized() => new(CurrentValueAsString, DefaultVirtualizeItemText ?? CurrentValueAsString);
+    private SelectedItem GetItemByVirtualized() => new(CurrentValueAsString, _defaultVirtualizedItemText);
 
     private SelectedItem? GetItemByRows()
     {
@@ -204,6 +206,16 @@ private SelectedItem? SelectedRow
         return item;
     }
 
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    protected override void OnInitialized()
+    {
+        base.OnInitialized();
+
+        _defaultVirtualizedItemText = DefaultVirtualizeItemText ?? CurrentValueAsString;
+    }
+
     /// <summary>
     /// <inheritdoc/>
     /// </summary>
@@ -363,6 +375,7 @@ private async Task OnClickItem(SelectedItem item)
         }
         if (ret)
         {
+            _defaultVirtualizedItemText = item.Text;
             await SelectedItemChanged(item);
         }
     }

test/UnitTest/Components/SelectTest.cs

@@ -761,7 +761,7 @@ public void ItemClick_Ok()
     }
 
     [Fact]
-    public void DefaultVirtualizeItemText_Ok()
+    public void DefaultVirtualizeItemText_Null()
     {
         var cut = Context.RenderComponent<Select<string>>(pb =>
         {
@@ -776,12 +776,33 @@ public void DefaultVirtualizeItemText_Ok()
 
         var input = cut.Find(".form-select");
         Assert.Contains("value=\"3\"", input.OuterHtml);
+    }
 
-        cut.SetParametersAndRender(pb =>
+    [Fact]
+    public async Task DefaultVirtualizeItemText_Ok()
+    {
+        var cut = Context.RenderComponent<Select<string>>(pb =>
         {
+            pb.Add(a => a.Items, new SelectedItem[]
+            {
+                new("1", "Test1"),
+                new("2", "Test2")
+            });
+            pb.Add(a => a.Value, "3");
+            pb.Add(a => a.IsVirtualize, true);
             pb.Add(a => a.DefaultVirtualizeItemText, "Test3");
         });
+
+        var input = cut.Find(".form-select");
         Assert.Contains("value=\"Test3\"", input.OuterHtml);
+
+        var items = cut.FindAll(".dropdown-item");
+        Assert.Equal(2, items.Count);
+
+        var item = items[1];
+        await cut.InvokeAsync(() => item.Click());
+        input = cut.Find(".form-select");
+        Assert.Contains("value=\"Test2\"", input.OuterHtml);
     }
 
     [Fact]