refactor: 更新变量名称

Author: ArgoZhang

src/BootstrapBlazor/Components/Table/Table.razor

@@ -369,13 +369,12 @@
             {
                 @if (Items != null)
                 {
-                    <Virtualize @ref="VirtualizeElement"
-                                ItemSize="RowHeight" OverscanCount="10" Items="@Items.ToList()" ChildContent="RenderRow">
+                    <Virtualize ItemSize="RowHeight" OverscanCount="10" Items="@Items.ToList()" ChildContent="RenderRow">
                     </Virtualize>
                 }
                 else
                 {
-                    <Virtualize @ref="VirtualizeElement"
+                    <Virtualize @ref="_virtualizeElement"
                                 ItemSize="RowHeight" OverscanCount="10" Placeholder="RenderPlaceholderRow"
                                 ItemsProvider="LoadItems" ItemContent="RenderRow">
                     </Virtualize>

src/BootstrapBlazor/Components/Table/Table.razor.cs

@@ -38,7 +38,8 @@ public partial class Table<TItem> : ITable, IModelEqualityComparer<TItem> where
     /// <summary>
     /// 获得/设置 内置虚拟化组件实例
     /// </summary>
-    protected Virtualize<TItem>? VirtualizeElement { get; set; }
+    [NotNull]
+    private Virtualize<TItem>? _virtualizeElement = null;
 
     /// <summary>
     /// 获得 Table 组件样式表