编辑

CodeDelegateInvokeExpression Class

  • Reference

Definition

Namespace:
System.CodeDom
Assembly:
System.CodeDom.dll
Assembly:
System.dll
Package:
System.CodeDom v6.0.0
Package:
System.CodeDom v7.0.0
Package:
System.CodeDom v8.0.0
Package:
System.CodeDom v9.0.0-preview.2.24128.5
Source:
CodeDelegateInvokeExpression.cs
Source:
CodeDelegateInvokeExpression.cs
Source:
CodeDelegateInvokeExpression.cs

Represents an expression that raises an event.

public ref class CodeDelegateInvokeExpression : System::CodeDom::CodeExpression
public class CodeDelegateInvokeExpression : System.CodeDom.CodeExpression
[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class CodeDelegateInvokeExpression : System.CodeDom.CodeExpression
type CodeDelegateInvokeExpression = class
    inherit CodeExpression
[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)>]
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Serializable>]
type CodeDelegateInvokeExpression = class
    inherit CodeExpression
Public Class CodeDelegateInvokeExpression
Inherits CodeExpression
Inheritance
Object
CodeObject
CodeExpression
CodeDelegateInvokeExpression
Attributes
ClassInterfaceAttribute ComVisibleAttribute SerializableAttribute

Examples

The following example demonstrates use of a CodeDelegateInvokeExpression to invoke an event named TestEvent.

// Invokes the delegates for an event named TestEvent, passing a local object reference and a new System.EventArgs.
array<CodeExpression^>^temp1 = {gcnew CodeThisReferenceExpression,gcnew CodeObjectCreateExpression( "System.EventArgs", nullptr )};
CodeDelegateInvokeExpression^ invoke1 = gcnew CodeDelegateInvokeExpression( gcnew CodeEventReferenceExpression( gcnew CodeThisReferenceExpression,"TestEvent" ),temp1 );

// A C# code generator produces the following source code for the preceeding example code:
//    this.TestEvent(this, new System.EventArgs());

// Invokes the delegates for an event named TestEvent, passing a local object reference and a new System.EventArgs.
CodeDelegateInvokeExpression invoke1 = new CodeDelegateInvokeExpression( new CodeEventReferenceExpression(new CodeThisReferenceExpression(), "TestEvent"),
    new CodeExpression[] { new CodeThisReferenceExpression(), new CodeObjectCreateExpression("System.EventArgs") } );

// A C# code generator produces the following source code for the preceeding example code:

//    this.TestEvent(this, new System.EventArgs());

' Invokes the delegates for an event named TestEvent, passing a local object reference and a new System.EventArgs.
Dim invoke1 As New CodeDelegateInvokeExpression( _
    New CodeEventReferenceExpression(New CodeThisReferenceExpression(), "TestEvent"), _
    New CodeExpression() {New CodeThisReferenceExpression(), New CodeObjectCreateExpression("System.EventArgs")})

' A Visual Basic code generator produces the following source code for the preceeding example code:

'   RaiseEvent TestEvent(Me, New System.EventArgs())

Remarks

CodeDelegateInvokeExpression can be used to represent code that invokes an event. Invoking an event invokes all delegates that are registered with the event using the specified parameters.

The TargetObject property specifies the event to invoke. The Parameters property specifies the parameters to pass to the delegates for the event.

Constructors

CodeDelegateInvokeExpression()

Initializes a new instance of the CodeDelegateInvokeExpression class.
CodeDelegateInvokeExpression(CodeExpression)

Initializes a new instance of the CodeDelegateInvokeExpression class using the specified target object.
CodeDelegateInvokeExpression(CodeExpression, CodeExpression[])

Initializes a new instance of the CodeDelegateInvokeExpression class using the specified target object and parameters.

Properties

Parameters

Gets or sets the parameters to pass to the event handling methods attached to the event.
TargetObject

Gets or sets the event to invoke.
UserData

Gets the user-definable data for the current object.

(Inherited from CodeObject)

Methods

Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ToString()

Returns a string that represents the current object.

(Inherited from Object)

Applies to

See also