ToolBar.ButtonDropDown 事件

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

發生於按一下下拉式 ToolBarButton 或其向下鍵時。

public:
 event System::Windows::Forms::ToolBarButtonClickEventHandler ^ ButtonDropDown;

public event System.Windows.Forms.ToolBarButtonClickEventHandler ButtonDropDown;

member this.ButtonDropDown : System.Windows.Forms.ToolBarButtonClickEventHandler 

Public Custom Event ButtonDropDown As ToolBarButtonClickEventHandler 

事件類型

ToolBarButtonClickEventHandler

範例

下列程式碼範例會 ToolBar 建立 控制項、設定其一些通用屬性，並將其新增至 Form 。 委派也會新增至 ButtonClick 和 ButtonDropDown 事件。 此範例要求 ToolBar 已宣告具名 toolBar1 和 ImageList 具名 imageList1 的 。

void AddToolBar()
{
   
   // Add a toolbar and set some of its properties.
   toolBar1 = gcnew ToolBar;
   toolBar1->Appearance = System::Windows::Forms::ToolBarAppearance::Flat;
   toolBar1->BorderStyle = System::Windows::Forms::BorderStyle::None;
   toolBar1->Buttons->Add( this->toolBarButton1 );
   toolBar1->ButtonSize = System::Drawing::Size( 24, 24 );
   toolBar1->Divider = true;
   toolBar1->DropDownArrows = true;
   toolBar1->ImageList = this->imageList1;
   toolBar1->ShowToolTips = true;
   toolBar1->Size = System::Drawing::Size( 292, 25 );
   toolBar1->TabIndex = 0;
   toolBar1->TextAlign = System::Windows::Forms::ToolBarTextAlign::Right;
   toolBar1->Wrappable = false;
   
   // Add handlers for the ButtonClick and ButtonDropDown events.
   toolBar1->ButtonDropDown += gcnew ToolBarButtonClickEventHandler( this, &MyToolBar::toolBar1_ButtonDropDown );
   toolBar1->ButtonClick += gcnew ToolBarButtonClickEventHandler( this, &MyToolBar::toolBar1_ButtonClicked );
   
   // Add the toolbar to the form.
   this->Controls->Add( toolBar1 );
}

private void AddToolBar()
{
   // Add a toolbar and set some of its properties.
   toolBar1 = new ToolBar();
   toolBar1.Appearance = System.Windows.Forms.ToolBarAppearance.Flat;
   toolBar1.BorderStyle = System.Windows.Forms.BorderStyle.None;
   toolBar1.Buttons.Add(this.toolBarButton1);
   toolBar1.ButtonSize = new System.Drawing.Size(24, 24);
   toolBar1.Divider = true;
   toolBar1.DropDownArrows = true;
   toolBar1.ImageList = this.imageList1;
   toolBar1.ShowToolTips = true;
   toolBar1.Size = new System.Drawing.Size(292, 25);
   toolBar1.TabIndex = 0;
   toolBar1.TextAlign = System.Windows.Forms.ToolBarTextAlign.Right;
   toolBar1.Wrappable = false;
   
   // Add handlers for the ButtonClick and ButtonDropDown events.
   toolBar1.ButtonDropDown += 
     new ToolBarButtonClickEventHandler(toolBar1_ButtonDropDown);
   toolBar1.ButtonClick += 
     new ToolBarButtonClickEventHandler(toolBar1_ButtonClicked);

   // Add the toolbar to the form.
   this.Controls.Add(toolBar1);
}

Private Sub AddToolBar()
   ' Add a toolbar and set some of its properties.
   toolBar1 = New ToolBar()
   toolBar1.Appearance = System.Windows.Forms.ToolBarAppearance.Flat
   toolBar1.BorderStyle = System.Windows.Forms.BorderStyle.None
   toolBar1.Buttons.Add(Me.toolBarButton1)
   toolBar1.ButtonSize = New System.Drawing.Size(24, 24)
   toolBar1.Divider = True
   toolBar1.DropDownArrows = True
   toolBar1.ImageList = Me.imageList1
   toolBar1.ShowToolTips = True
   toolBar1.Size = New System.Drawing.Size(292, 25)
   toolBar1.TabIndex = 0
   toolBar1.TextAlign = System.Windows.Forms.ToolBarTextAlign.Right
   toolBar1.Wrappable = False

   ' Add handlers for the ButtonClick and ButtonDropDown events.
   AddHandler toolBar1.ButtonDropDown, AddressOf toolBar1_ButtonDropDown
   AddHandler toolBar1.ButtonClick, AddressOf toolBar1_ButtonClicked

   ' Add the toolbar to the form.
   Me.Controls.Add(toolBar1)
End Sub

備註

如需處理事件的詳細資訊，請參閱 處理和引發事件。

另請參閱

• ToolBarButton
• ToolBarAppearance