IDispatchImplAttribute IDispatchImplAttribute IDispatchImplAttribute IDispatchImplAttribute Class

Definition

Warning

This API is now obsolete.

Indicates which IDispatch implementation the common language runtime uses when exposing dual interfaces and dispinterfaces to COM.

public ref class IDispatchImplAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class, Inherited=false)]
[System.Obsolete("This attribute is deprecated and will be removed in a future version.", false)]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class IDispatchImplAttribute : Attribute
type IDispatchImplAttribute = class
    inherit Attribute
Public NotInheritable Class IDispatchImplAttribute
Inherits Attribute
Inheritance
IDispatchImplAttributeIDispatchImplAttributeIDispatchImplAttributeIDispatchImplAttribute
Attributes

Examples

The following example demonstrates how to apply IDispatchImplAttribute to select the IDispatch implementation supplied by the common language runtime.

using namespace System;
using namespace System::Runtime::InteropServices;

// by default all classes in this assembly will use COM implementaion
//   // But this class will use runtime implementaion

[assembly:IDispatchImpl(IDispatchImplType::CompatibleImpl)];
[IDispatchImpl(IDispatchImplType::InternalImpl)]
ref class MyClass{};
using System;
using System.Runtime.InteropServices;
// by default all classes in this assembly will use COM implementaion 
[assembly:IDispatchImpl(IDispatchImplType.CompatibleImpl)]

namespace MyNamespace
{
	// But this class will use runtime implementaion
	[IDispatchImpl(IDispatchImplType.InternalImpl)]
	class MyClass
	{
		//
	}
}

Imports System
Imports System.Runtime.InteropServices
' by default all classes in this assembly will use COM implementaion 
<Assembly: IDispatchImpl(IDispatchImplType.CompatibleImpl)> 

Module MyNamespace
	' But this class will use runtime implementaion
	<IDispatchImpl(IDispatchImplType.InternalImpl)> _
	Public Class c
		'
	End Class

End Module

Remarks

You can apply this attribute to classes or assemblies.

This attribute should only be set when an explicit implementation is required. When you set the attribute to CompatibleImpl, the IDispatch implementation is supplied by passing the type information for the object to COM's CreateStdDispatch API. When you set the attribute to InternalImpl, the IDispatch implementation is supplied by the common language runtime. Setting the attribute to SystemDefinedImpl allows the runtime to choose the appropriate implementation. When using the attribute on an assembly, the attribute applies to all classes defined within the assembly. When using the attribute on an individual class, the attribute applies only to the interfaces exposed by that class and overrides any assembly-level setting.

Constructors

IDispatchImplAttribute(IDispatchImplType) IDispatchImplAttribute(IDispatchImplType) IDispatchImplAttribute(IDispatchImplType) IDispatchImplAttribute(IDispatchImplType)

Initializes a new instance of the IDispatchImplAttribute class with specified IDispatchImplType value.

IDispatchImplAttribute(Int16) IDispatchImplAttribute(Int16) IDispatchImplAttribute(Int16) IDispatchImplAttribute(Int16)

Initializes a new instance of the IDispatchImplAttribute class with specified IDispatchImplType value.

Properties

TypeId TypeId TypeId TypeId

When implemented in a derived class, gets a unique identifier for this Attribute.

(Inherited from Attribute)
Value Value Value Value

Gets the IDispatchImplType value used by the class.

Methods

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Returns a value that indicates whether this instance is equal to a specified object.

(Inherited from Attribute)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Returns the hash code for this instance.

(Inherited from Attribute)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
IsDefaultAttribute() IsDefaultAttribute() IsDefaultAttribute() 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) Match(Object) Match(Object) Match(Object)

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.

(Inherited from Attribute)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)

Explicit Interface Implementations

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.

(Inherited from Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.

(Inherited from Attribute)
_Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32)

Retrieves the number of type information interfaces that an object provides (either 0 or 1).

(Inherited from Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.

(Inherited from Attribute)

Applies to

See Also