获取或设置当SelectTree 节点处于禁用状态时，节点是否可以展开或折叠。默认值为 false。

Author: Admin

src/BootstrapBlazor/Components/Select/SelectTree.razor

@@ -23,6 +23,7 @@
         <TreeView TItem="TValue" Items="@Items" ShowIcon="ShowIcon"
                   OnTreeItemClick="OnItemClick" ModelEqualityComparer="@ModelEqualityComparer"
                   ShowSearch="ShowSearch" ShowResetSearchButton="ShowResetSearchButton"
+                  CanExpandWhenDisabled="CanExpandWhenDisabled"
                   CustomKeyAttribute="@CustomKeyAttribute" OnExpandNodeAsync="@OnExpandNodeAsync" />
     </div>
     @if (!IsPopover)

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

@@ -51,6 +51,12 @@ public partial class SelectTree<TValue> : IModelEqualityComparer<TValue>
     [Parameter]
     public string? PlaceHolder { get; set; }
 
+    /// <summary>
+    /// Gets or sets whether nodes can be expanded or collapsed when the component is disabled. Default is false.
+    /// </summary>
+    [Parameter]
+    public bool CanExpandWhenDisabled { get; set; } = false;
+
     /// <summary>
     /// 获得/设置 字符串比较规则 默认 StringComparison.OrdinalIgnoreCase 大小写不敏感 
     /// </summary>