IDispatchConstantAttribute Class

.NET Framework (current version)

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Indicates that the default value for the attributed field or parameter is an instance of DispatchWrapper, where the WrappedObject is null.

Namespace: System.Runtime.CompilerServices
Assembly: mscorlib (in mscorlib.dll)

Inheritance Hierarchy

System.Object
System.Attribute
System.Runtime.CompilerServices.CustomConstantAttribute
System.Runtime.CompilerServices.IDispatchConstantAttribute

Syntax

C++

[SerializableAttribute]
[AttributeUsageAttribute(AttributeTargets.Field | AttributeTargets.Parameter, 
	Inherited = false)]
[ComVisibleAttribute(true)]
public sealed class IDispatchConstantAttribute : CustomConstantAttribute

Constructors

	Name	Description
	IDispatchConstantAttribute()	Initializes a new instance of the IDispatchConstantAttribute class.

Properties

	Name	Description
	TypeId	When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)
	Value	Gets the IDispatch constant stored in this attribute.(Overrides CustomConstantAttribute.Value.)

Methods

	Name	Description
	Equals(Object)	This API supports the product infrastructure and is not intended to be used directly from your code. 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.)
	ToString()	Returns a string that represents the current object.(Inherited from Object.)

Explicit Interface Implementations

	Name	Description
	_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)	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)	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)	Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

Remarks

You can apply this attribute to fields or parameters.

The type library importer uses this attribute to distinguish a default value of type VT_DISPATCH from null.

For more information about constant attributes, see the CustomConstantAttribute class.

The classes in System.Runtime.CompilerServices are for compiler writers use only.

Version Information

.NET Framework
Available since 1.1

Thread Safety

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.