feat(Table): add 'ShowColumnListSelectExtension' parameter

Author: momijijin

src/BootstrapBlazor/Components/Table/Table.razor

@@ -118,6 +118,15 @@
                                 <span class="caret"></span>
                             </button>
                             <div class="dropdown-menu dropdown-menu-end shadow">
+                                @if (ShowColumnListSelectExtension)
+                                {
+                                    <div class="dropdown-item">
+                                        <Checkbox TValue="string" State="@VisibleColumnsCurrentSelectedResult"
+                                                  OnStateChanged="@OnToggleAllColumnsVisibleState">
+                                        </Checkbox>
+                                    </div>
+                                    <Divider/>
+                                }
                                 @foreach (var item in _visibleColumns)
                                 {
                                     <div class="dropdown-item">

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

@@ -173,4 +173,34 @@ private async Task OnToggleColumnVisible(string columnName, bool visible)
             await OnColumnVisibleChanged(columnName, visible);
         }
     }
+
+    /// <summary>
+    /// 当前所有列的是否全都显示/全都不显示/部分显示状态计算
+    /// </summary>
+    private CheckboxState VisibleColumnsCurrentSelectedResult
+        => _visibleColumns.All(r => r.Visible)
+            ? CheckboxState.Checked
+            : _visibleColumns.All(r => !r.Visible)
+                ? CheckboxState.UnChecked
+                : CheckboxState.Indeterminate;
+
+    private async Task OnToggleAllColumnsVisibleState(CheckboxState state, string _)
+    {
+        if (state == CheckboxState.Checked)
+            foreach (var column in _visibleColumns)
+            {
+                column.Visible = true;
+                await OnToggleColumnVisible(column.Name, true);
+            }
+        else if (state == CheckboxState.UnChecked)
+        {
+            await ShowToastAsync("提示", "表格需要至少有一列显示，点击全不选时默认第一列维持显示状态", ToastCategory.Warning);
+            foreach (var column in _visibleColumns.Skip(1).ToList())
+            {
+                column.Visible = false;
+                await OnToggleColumnVisible(column.Name, false);
+            }
+        }
+        await InvokeAsync(StateHasChanged);
+    }
 }

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

@@ -310,6 +310,12 @@ public Func<TItem, bool>? ShowDeleteButtonCallback
     [Parameter]
     public bool ShowColumnList { get; set; }
 
+    /// <summary>
+    /// 获得/设置 列选择下拉框中是否显示扩展的选择功能默认为 false 不显示
+    /// </summary>
+    [Parameter]
+    public bool ShowColumnListSelectExtension { get; set; }
+
     /// <summary>
     /// 获得/设置 列选择下拉框图标
     /// </summary>