CodeDelegateInvokeExpression Class

Definition

Namespace:

System.CodeDom

Assembly:

System.CodeDom.dll

Represents an expression that raises an event.

public ref class CodeDelegateInvokeExpression : System::CodeDom::CodeExpression

public class CodeDelegateInvokeExpression : System.CodeDom.CodeExpression

type CodeDelegateInvokeExpression = class
    inherit CodeExpression

Public Class CodeDelegateInvokeExpression
Inherits CodeExpression

Inheritance

Object

CodeObject

CodeExpression

CodeDelegateInvokeExpression

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

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)

See also

• CodeExpression