refactor: 增加 DefaultVirtualizeItemText 参数

Author: ArgoZhang

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

@@ -118,6 +118,12 @@ public partial class Select<TValue> : ISelect, ILookup
     [Parameter]
     public object? LookupServiceData { get; set; }
 
+    /// <summary>
+    /// Gets or sets the default text for virtualized items. Default is null.
+    /// </summary>
+    [Parameter]
+    public string? DefaultVirtualizeItemText { get; set; }
+
     /// <summary>
     /// <inheritdoc/>
     /// </summary>
@@ -172,7 +178,7 @@ private SelectedItem? SelectedRow
         if (IsVirtualize)
         {
             _init = false;
-            return new SelectedItem(CurrentValueAsString, CurrentValueAsString);
+            return new SelectedItem(CurrentValueAsString, DefaultVirtualizeItemText ?? CurrentValueAsString);
         }
 
         var item = GetItemWithEnumValue()

src/BootstrapBlazor/Components/Select/SelectBase.cs

@@ -111,14 +111,6 @@ public abstract class SelectBase<TValue> : PopoverSelectBase<TValue>
     [Parameter]
     public int OverscanCount { get; set; } = 4;
 
-    /// <summary>
-    /// Gets or sets the default text for virtualized items. Default is null.
-    /// </summary>
-    [Parameter]
-    [ExcludeFromCodeCoverage]
-    [Obsolete("已弃用，删除即可；Deprecated, just delete")]
-    public string? DefaultVirtualizeItemText { get; set; }
-
     /// <summary>
     /// Gets or sets the callback method when the clear button is clicked. Default is null.
     /// </summary>