ToolStripDropDownMenu.ShowCheckMargin 屬性

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

取得或設定值，指出是否會在 ToolStripMenuItem 的左邊緣顯示核取記號的空間。

public:
 property bool ShowCheckMargin { bool get(); void set(bool value); };

public bool ShowCheckMargin { get; set; }

member this.ShowCheckMargin : bool with get, set

Public Property ShowCheckMargin As Boolean

屬性值

Boolean

如果會顯示核取邊界，則為 true，否則為 false。 預設為 false。

範例

下列程式碼範例示範如何藉由設定檢查和影像邊界來建立和初始化 ContextMenuStrip 控制項。 如需完整的程式代碼清單，請參閱 How to： Enable Check Margins and Image Margins in CoNtextMenuStrip Controls。

public Form5()
{
    // Size the form to show three wide menu items.
    this.Width = 500;
    this.Text = "ToolStripContextMenuStrip: Image and Check Margins";

    // Create a new MenuStrip control.
    MenuStrip ms = new MenuStrip();

    // Create the ToolStripMenuItems for the MenuStrip control.
    ToolStripMenuItem bothMargins = new ToolStripMenuItem("BothMargins");
    ToolStripMenuItem imageMarginOnly = new ToolStripMenuItem("ImageMargin");
    ToolStripMenuItem checkMarginOnly = new ToolStripMenuItem("CheckMargin");
    ToolStripMenuItem noMargins = new ToolStripMenuItem("NoMargins");

    // Customize the DropDowns menus.
    // This ToolStripMenuItem has an image margin 
    // and a check margin.
    bothMargins.DropDown = CreateCheckImageContextMenuStrip();
    ((ContextMenuStrip)bothMargins.DropDown).ShowImageMargin = true;
    ((ContextMenuStrip)bothMargins.DropDown).ShowCheckMargin = true;

    // This ToolStripMenuItem has only an image margin.
    imageMarginOnly.DropDown = CreateCheckImageContextMenuStrip();
    ((ContextMenuStrip)imageMarginOnly.DropDown).ShowImageMargin = true;
    ((ContextMenuStrip)imageMarginOnly.DropDown).ShowCheckMargin = false;

    // This ToolStripMenuItem has only a check margin.
    checkMarginOnly.DropDown = CreateCheckImageContextMenuStrip();
    ((ContextMenuStrip)checkMarginOnly.DropDown).ShowImageMargin = false;
    ((ContextMenuStrip)checkMarginOnly.DropDown).ShowCheckMargin = true;

    // This ToolStripMenuItem has no image and no check margin.
    noMargins.DropDown = CreateCheckImageContextMenuStrip();
    ((ContextMenuStrip)noMargins.DropDown).ShowImageMargin = false;
    ((ContextMenuStrip)noMargins.DropDown).ShowCheckMargin = false;

    // Populate the MenuStrip control with the ToolStripMenuItems.
    ms.Items.Add(bothMargins);
    ms.Items.Add(imageMarginOnly);
    ms.Items.Add(checkMarginOnly);
    ms.Items.Add(noMargins);

    // Dock the MenuStrip control to the top of the form.
    ms.Dock = DockStyle.Top;

    // Add the MenuStrip control to the controls collection last.
    // This is important for correct placement in the z-order.
    this.Controls.Add(ms);
}

Public Sub New()
   ' Size the form to show three wide menu items.
   Me.Width = 500
   Me.Text = "ToolStripContextMenuStrip: Image and Check Margins"
   
   ' Create a new MenuStrip control.
   Dim ms As New MenuStrip()
   
   ' Create the ToolStripMenuItems for the MenuStrip control.
   Dim bothMargins As New ToolStripMenuItem("BothMargins")
   Dim imageMarginOnly As New ToolStripMenuItem("ImageMargin")
   Dim checkMarginOnly As New ToolStripMenuItem("CheckMargin")
   Dim noMargins As New ToolStripMenuItem("NoMargins")
   
   ' Customize the DropDowns menus.
   ' This ToolStripMenuItem has an image margin 
   ' and a check margin.
   bothMargins.DropDown = CreateCheckImageContextMenuStrip()
   CType(bothMargins.DropDown, ContextMenuStrip).ShowImageMargin = True
   CType(bothMargins.DropDown, ContextMenuStrip).ShowCheckMargin = True
   
   ' This ToolStripMenuItem has only an image margin.
   imageMarginOnly.DropDown = CreateCheckImageContextMenuStrip()
   CType(imageMarginOnly.DropDown, ContextMenuStrip).ShowImageMargin = True
   CType(imageMarginOnly.DropDown, ContextMenuStrip).ShowCheckMargin = False
   
   ' This ToolStripMenuItem has only a check margin.
   checkMarginOnly.DropDown = CreateCheckImageContextMenuStrip()
   CType(checkMarginOnly.DropDown, ContextMenuStrip).ShowImageMargin = False
   CType(checkMarginOnly.DropDown, ContextMenuStrip).ShowCheckMargin = True
   
   ' This ToolStripMenuItem has no image and no check margin.
   noMargins.DropDown = CreateCheckImageContextMenuStrip()
   CType(noMargins.DropDown, ContextMenuStrip).ShowImageMargin = False
   CType(noMargins.DropDown, ContextMenuStrip).ShowCheckMargin = False
   
   ' Populate the MenuStrip control with the ToolStripMenuItems.
   ms.Items.Add(bothMargins)
   ms.Items.Add(imageMarginOnly)
   ms.Items.Add(checkMarginOnly)
   ms.Items.Add(noMargins)
   
   ' Dock the MenuStrip control to the top of the form.
   ms.Dock = DockStyle.Top
   
   ' Add the MenuStrip control to the controls collection last.
   ' This is important for correct placement in the z-order.
   Me.Controls.Add(ms)
 End Sub

備註

將 ShowCheckMargin 屬性設定為 true ，以在使用者選擇 ToolStripMenuItem 時顯示核取記號。

另請參閱

• ShowImageMargin
• 作法：啟用 ContextMenuStrip 控制項的核取邊界和影像邊界