MenuCommand 类

定义

public ref class MenuCommand

public class MenuCommand

[System.Runtime.InteropServices.ComVisible(true)]
public class MenuCommand

type MenuCommand = class

[<System.Runtime.InteropServices.ComVisible(true)>]
type MenuCommand = class

Public Class MenuCommand

继承

Object

MenuCommand

派生

System.ComponentModel.Design.DesignerVerb

属性

ComVisibleAttribute

示例

下面的代码示例创建一个 MenuCommand 对象，配置其属性，并将其添加到 。IMenuCommandService

在窗体上创建 类的 Component1 实例，并在 Visual Studio 等设计环境中打开该窗体。 按 F1 键调用 MenuCommand。

#using <system.dll>
#using <system.design.dll>
#using <system.windows.forms.dll>

using namespace System;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Security::Permissions;

namespace CppMenuCommand
{
   public ref class CDesigner: public ComponentDesigner
   {
   public:
    [PermissionSetAttribute(SecurityAction::Demand, Name="FullTrust")]
      virtual void Initialize( IComponent^ comp ) override
      {
         ComponentDesigner::Initialize( comp );
         IMenuCommandService^ mcs = static_cast<IMenuCommandService^>(comp->Site->GetService( IMenuCommandService::typeid ));
         MenuCommand^ mc = gcnew MenuCommand( gcnew EventHandler( this, &CDesigner::OnF1Help ),StandardCommands::F1Help );
         mc->Enabled = true;
         mc->Visible = true;
         mc->Supported = true;
         mcs->AddCommand( mc );
         System::Windows::Forms::MessageBox::Show( "Initialize() has been invoked." );
      }

   private:
      void OnF1Help( Object^ /*sender*/, EventArgs^ /*e*/ )
      {
         System::Windows::Forms::MessageBox::Show( "F1Help has been invoked." );
      }
   };
}

using System;
using System.ComponentModel;
using System.ComponentModel.Design;

namespace CSMenuCommand
{
    [Designer(typeof(CDesigner))]
    public class Component1 : System.ComponentModel.Component
    {
        private System.ComponentModel.Container components = null;

        public Component1(System.ComponentModel.IContainer container)
        {
            container.Add(this);
            InitializeComponent();
        }

        public Component1()
        {
            InitializeComponent();
        }

        private void InitializeComponent()
        {
            components = new System.ComponentModel.Container();
        }
    }

    public class CDesigner : System.ComponentModel.Design.ComponentDesigner 
    {
        public override void Initialize(IComponent comp) 
        {
            base.Initialize(comp);

            IMenuCommandService mcs = (IMenuCommandService)comp.Site.
                        GetService(typeof(IMenuCommandService));
            MenuCommand mc = new MenuCommand(new EventHandler(OnF1Help), StandardCommands.F1Help);
            mc.Enabled = true;
            mc.Visible = true;
            mc.Supported = true;
            mcs.AddCommand(mc);
            System.Windows.Forms.MessageBox.Show("Initialize() has been invoked.");
        }

        private void OnF1Help(object sender, EventArgs e) 
        {
            System.Windows.Forms.MessageBox.Show("F1Help has been invoked.");
        }
    }
}

Imports System.ComponentModel
Imports System.ComponentModel.Design

Namespace VbMenuCommand
    <Designer(GetType(CDesigner))> _
    Public Class Component1
        Inherits System.ComponentModel.Component
        Private components As System.ComponentModel.Container = Nothing

        Public Sub New(ByVal container As System.ComponentModel.IContainer)
            container.Add(Me)
            InitializeComponent()
        End Sub

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub InitializeComponent()
        End Sub
    End Class

    <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
    Public Class CDesigner
        Inherits System.ComponentModel.Design.ComponentDesigner

        Public Overrides Sub Initialize(ByVal comp As IComponent)
            MyBase.Initialize(comp)

            Dim mcs As IMenuCommandService = CType(comp.Site.GetService(GetType(IMenuCommandService)), IMenuCommandService)
            Dim mc As New MenuCommand(New EventHandler(AddressOf OnF1Help), StandardCommands.F1Help)
            mc.Enabled = True
            mc.Visible = True
            mc.Supported = True
            mcs.AddCommand(mc)
            System.Windows.Forms.MessageBox.Show("Initialize() has been invoked.")
        End Sub

        Private Sub OnF1Help(ByVal sender As Object, ByVal e As EventArgs)
            System.Windows.Forms.MessageBox.Show("F1Help has been invoked.")
        End Sub
    End Class
End Namespace

注解

类 MenuCommand 表示有关 Windows 菜单或工具栏命令的信息。 接口 IMenuCommandService 允许将 对象添加到 MenuCommand Visual Studio 菜单。

此类提供以下成员：

• 可将命令的事件处理程序附加到的事件处理程序属性。

• 唯一 CommandID 标识命令的属性。

• 执行 Invoke 命令的方法。

• 一种 OnCommandChanged 可以重写的方法，用于处理选择新命令时发生的事件。

• 指示命令是 Checked、 Enabled、 Supported还是 Visible的布尔标志状态。

• 指示 OleStatus 命令的 OLE 命令状态代码的属性。

• 方法的 ToString 替代。

构造函数

属性

方法

事件

适用于

另请参阅

• StandardCommands
• IMenuCommandService
• CommandID
• Windows 窗体的设计器命令和 DesignerAction 对象模型