ToolBar.ToolBarButtonCollection.Count 属性

public:
 property int Count { int get(); };

[System.ComponentModel.Browsable(false)]
public int Count { get; }

[<System.ComponentModel.Browsable(false)>]
member this.Count : int

Public ReadOnly Property Count As Integer

属性值

分配给工具栏的 ToolBarButton 控件数。

实现

属性

BrowsableAttribute

示例

下面的代码示例显示 Count 调用方法前后的 Buttons 前面和之后 Clear 。 此代码要求 ToolBar 已创建至少一个 ToolBarButton 代码。

public:
   void ClearMyToolBar()
   {
      int btns;
      // Get the count before the Clear method is called.
      btns = toolBar1->Buttons->Count;
      toolBar1->Buttons->Clear();
      MessageBox::Show( "Count Before Clear: " + btns.ToString() +
         "\nCount After Clear: " + toolBar1->Buttons->Count.ToString() );
   }

public void ClearMyToolBar()
 {
    int btns;
    // Get the count before the Clear method is called.
    btns = toolBar1.Buttons.Count;
    toolBar1.Buttons.Clear();
    MessageBox.Show("Count Before Clear: " + btns.ToString() +
                    "\nCount After Clear: " + toolBar1.Buttons.Count.ToString());
 }

Public Sub ClearMyToolBar()
    Dim btns As Integer
    ' Get the count before the Clear method is called.
    btns = toolBar1.Buttons.Count
    toolBar1.Buttons.Clear()
    MessageBox.Show("Count Before Clear: " + btns.ToString() & _
        Microsoft.VisualBasic.ControlChars.Cr & "Count After Clear: " & _
        toolBar1.Buttons.Count.ToString())
End Sub

注解

该 Count 属性保存分配给集合的实际控件数 ToolBarButton 。 通常使用 Count 属性值作为循环的上限来循环访问集合。 集合的索引值为从零开始的索引，因此必须从循环变量中减去一个索引，否则将超出集合的上限并引发异常。

另请参阅

• ToolBarButton