ComSourceInterfacesAttribute Class

Definition

Namespace:

System.Runtime.InteropServices

Assembly:

System.Runtime.InteropServices.dll

Source:

ComSourceInterfacesAttribute.cs

Identifies a list of interfaces that are exposed as COM event sources for the attributed class.

public ref class ComSourceInterfacesAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Class, Inherited=true)]
public sealed class ComSourceInterfacesAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Class, Inherited=true)>]
type ComSourceInterfacesAttribute = class
    inherit Attribute

Public NotInheritable Class ComSourceInterfacesAttribute
Inherits Attribute

Inheritance

Object

Attribute

ComSourceInterfacesAttribute

Attributes

AttributeUsageAttribute

Examples

The following example shows how to apply the ComSourceInterfacesAttribute to connect the event sink interface to a class by passing the namespace and event sink interface.

using namespace System::Runtime::InteropServices;

[ComSourceInterfacesAttribute("ButtonEventsLib.ButtonEvents, ButtonEventsLib")]
public ref class Baz{};

using System.Runtime.InteropServices;

[ComSourceInterfacesAttribute("ButtonEventsLib.ButtonEvents, ButtonEventsLib")]
public class Baz
{
   //Insert code here.
}

Imports System.Runtime.InteropServices

<ComSourceInterfacesAttribute("ButtonEventsLib.ButtonEvents, ButtonEventsLib")> _
public Class Baz
    'Insert code here.
End Class

Remarks

You can apply this attribute to classes.

You apply this attribute to a managed class to identify the event interfaces that the class exposes as COM connection points. An event interface contains methods that map to the event members of the class. The class event name and the interface method name must be the same. This attribute can accommodate up to four source interfaces for a class by passing the type of the source interface to the appropriate constructor, which take between one and four type arguments. For classes that want to expose more than four source interfaces, the string version of the constructor can be used. For additional information about exposing.NET events to COM clients, see How to: Raise Events Handled by a COM Sink.

Constructors

ComSourceInterfacesAttribute(String)	Initializes a new instance of the ComSourceInterfacesAttribute class with the name of the event source interface.
ComSourceInterfacesAttribute(Type)	Initializes a new instance of the ComSourceInterfacesAttribute class with the type to use as a source interface.
ComSourceInterfacesAttribute(Type, Type)	Initializes a new instance of the ComSourceInterfacesAttribute class with the types to use as source interfaces.
ComSourceInterfacesAttribute(Type, Type, Type)	Initializes a new instance of the ComSourceInterfacesAttribute class with the types to use as source interfaces.
ComSourceInterfacesAttribute(Type, Type, Type, Type)	Initializes a new instance of the ComSourceInterfacesAttribute class with the types to use as source interfaces.

Properties

TypeId	When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute)
Value	Gets the fully qualified name of the event source interface.

Methods

Equals(Object)	Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute)
GetHashCode()	Returns the hash code for this instance. (Inherited from Attribute)
GetType()	Gets the Type of the current instance. (Inherited from Object)
IsDefaultAttribute()	When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute)
Match(Object)	When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)