DesignerVerb 类

定义

命名空间:

System.ComponentModel.Design

程序集:

System.ComponentModel.TypeConverter.dll

Source:

DesignerVerb.cs

表示可从设计器中调用的谓词。

public ref class DesignerVerb : System::ComponentModel::Design::MenuCommand

public class DesignerVerb : System.ComponentModel.Design.MenuCommand

type DesignerVerb = class
    inherit MenuCommand

Public Class DesignerVerb
Inherits MenuCommand

继承

Object

MenuCommand

DesignerVerb

派生

System.Web.UI.Design.TemplateEditingVerb

System.Workflow.ComponentModel.Design.ActivityDesignerVerb

示例

下面的代码示例演示如何创建 DesignerVerb 对象并将其添加到组件的设计时快捷菜单。

#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::Windows::Forms;

/* This sample demonstrates a designer that adds menu commands
to the design-time shortcut menu for a component.

To test this sample, build the code for the component as a class library,
add the resulting component to the toolbox, open a form in design mode,
and drag the component from the toolbox onto the form.

The component should appear in the component tray beneath the form.
Right-click the component.  The verbs should appear in the shortcut menu.
*/
// This is a designer class which provides designer verb menu commands for
// the associated component. This code is called by the design environment at design-time.
private ref class MyDesigner: public ComponentDesigner
{
public:

   property DesignerVerbCollection^ Verbs 
   {
      // DesignerVerbCollection is overridden from ComponentDesigner
      virtual DesignerVerbCollection^ get() override
      {
         if ( m_Verbs == nullptr )
         {
            // Create and initialize the collection of verbs
            m_Verbs = gcnew DesignerVerbCollection;
            m_Verbs->Add( gcnew DesignerVerb( "First Designer Verb",gcnew EventHandler( this, &MyDesigner::OnFirstItemSelected ) ) );
            m_Verbs->Add( gcnew DesignerVerb( "Second Designer Verb",gcnew EventHandler( this, &MyDesigner::OnSecondItemSelected ) ) );
         }

         return m_Verbs;
      }
   }
   MyDesigner(){}

private:
   DesignerVerbCollection^ m_Verbs;
   void OnFirstItemSelected( Object^ /*sender*/, EventArgs^ /*args*/ )
   {
      // Display a message
      MessageBox::Show( "The first designer verb was invoked." );
   }

   void OnSecondItemSelected( Object^ /*sender*/, EventArgs^ /*args*/ )
   {
      // Display a message
      MessageBox::Show( "The second designer verb was invoked." );
   }
};

// Associate MyDesigner with this component type using a DesignerAttribute
[Designer(MyDesigner::typeid)]
public ref class Component1: public System::ComponentModel::Component{};

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

/* This sample demonstrates a designer that adds menu commands
    to the design-time shortcut menu for a component.

    To test this sample, build the code for the component as a class library, 
    add the resulting component to the toolbox, open a form in design mode, 
    and drag the component from the toolbox onto the form. 

    The component should appear in the component tray beneath the form. 
    Right-click the component.  The verbs should appear in the shortcut menu.
*/

namespace CSDesignerVerb
{
    // Associate MyDesigner with this component type using a DesignerAttribute
    [Designer(typeof(MyDesigner))]
    public class Component1 : System.ComponentModel.Component
    {
    }

    // This is a designer class which provides designer verb menu commands for 
    // the associated component. This code is called by the design environment at design-time.
    internal class MyDesigner : ComponentDesigner
    {
        DesignerVerbCollection m_Verbs;

        // DesignerVerbCollection is overridden from ComponentDesigner
        public override DesignerVerbCollection Verbs
        {
            get 
            {
                if (m_Verbs == null) 
                {
                    // Create and initialize the collection of verbs
                    m_Verbs = new DesignerVerbCollection();
            
                    m_Verbs.Add( new DesignerVerb("First Designer Verb", new EventHandler(OnFirstItemSelected)) );
                    m_Verbs.Add( new DesignerVerb("Second Designer Verb", new EventHandler(OnSecondItemSelected)) );
                }
                return m_Verbs;
            }
        }

        MyDesigner() 
        {
        }

        private void OnFirstItemSelected(object sender, EventArgs args) 
        {
            // Display a message
            System.Windows.Forms.MessageBox.Show("The first designer verb was invoked.");
        }

        private void OnSecondItemSelected(object sender, EventArgs args) 
        {
            // Display a message
            System.Windows.Forms.MessageBox.Show("The second designer verb was invoked.");
        }
    }
}

Imports System.ComponentModel
Imports System.Collections
Imports System.ComponentModel.Design

'  This sample demonstrates a designer that adds menu commands
'   to the design-time shortcut menu for a component.
'
'   To test this sample, build the code for the component as a class library, 
'   add the resulting component to the toolbox, open a form in design mode, 
'   and drag the component from the toolbox onto the form. 
'
'   The component should appear in the component tray beneath the form. 
'   Right-click the component.  The verbs should appear in the shortcut menu.

Namespace VBDesignerVerb
    ' Associate MyDesigner with this component type using a DesignerAttribute
    <Designer(GetType(MyDesigner))> _
    Public Class Component1
        Inherits System.ComponentModel.Component
    End Class 


    '  This is a designer class which provides designer verb menu commands for 
    '  the associated component. This code is called by the design environment at design-time.    
    Friend Class MyDesigner
        Inherits ComponentDesigner

        Private m_Verbs As DesignerVerbCollection

        ' DesignerVerbCollection is overridden from ComponentDesigner
        Public Overrides ReadOnly Property Verbs() As DesignerVerbCollection
            Get
                If m_Verbs Is Nothing Then
                    ' Create and initialize the collection of verbs
                    m_Verbs = New DesignerVerbCollection()
                    m_Verbs.Add( New DesignerVerb("First Designer Verb", New EventHandler(AddressOf OnFirstItemSelected)) )
                    m_Verbs.Add( New DesignerVerb("Second Designer Verb", New EventHandler(AddressOf OnSecondItemSelected)) )
                End If
                Return m_Verbs
            End Get
        End Property

        Sub New()
        End Sub 

        Private Sub OnFirstItemSelected(ByVal sender As Object, ByVal args As EventArgs)
            ' Display a message
            System.Windows.Forms.MessageBox.Show("The first designer verb was invoked.")
        End Sub 

        Private Sub OnSecondItemSelected(ByVal sender As Object, ByVal args As EventArgs)
            ' Display a message
            System.Windows.Forms.MessageBox.Show("The second designer verb was invoked.")
        End Sub 
    End Class 
End Namespace

注解

设计器谓词是与事件处理程序链接的菜单命令。 设计器谓词会在设计时添加到组件的快捷菜单中。 在 Visual Studio 中，每个设计器谓词也会在属性窗口的“说明”窗格中使用 LinkLabel列出。

构造函数

DesignerVerb(String, EventHandler)	初始化 DesignerVerb 类的新实例。
DesignerVerb(String, EventHandler, CommandID)	初始化 DesignerVerb 类的新实例。

属性

Checked	获取或设置一个值，用以指示是否选中此菜单项。 (继承自 MenuCommand)
CommandID	获取与此菜单命令相关联的 CommandID。 (继承自 MenuCommand)
Description	获取或设置谓词菜单项的说明。
Enabled	获取一个值，该值指示此菜单项是否可用。 (继承自 MenuCommand)
OleStatus	获取此菜单项的 OLE 命令状态代码。 (继承自 MenuCommand)
Properties	获取与 MenuCommand 关联的公共属性。 (继承自 MenuCommand)
Supported	获取或设置一个值，用以指示是否支持此菜单项。 (继承自 MenuCommand)
Text	获取菜单上的谓词命令的文本说明。
Visible	获取或设置一个值，用以指示此菜单项是否可见。 (继承自 MenuCommand)

方法

Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
Invoke()	调用该命令。 (继承自 MenuCommand)
Invoke(Object)	使用给定参数调用命令。 (继承自 MenuCommand)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
OnCommandChanged(EventArgs)	引发 CommandChanged 事件。 (继承自 MenuCommand)
ToString()	重写 ToString()。

事件

CommandChanged

在菜单命令出现更改时发生。 (继承自 MenuCommand)

另请参阅

• MenuCommand
• IMenuCommandService