DefaultMemberAttribute Class
Defines the member of a type that is the default member used by InvokeMember.
Assembly: mscorlib (in mscorlib.dll)
| Name | Description | |
|---|---|---|
![]() | DefaultMemberAttribute(String^) | Initializes a new instance of the DefaultMemberAttribute class. |
| Name | Description | |
|---|---|---|
![]() | MemberName | Gets the name from the attribute. |
![]() | TypeId |
| 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() | |
![]() | 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.) |
| 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.) |
A property is imported as an indexer (default indexed property in Visual Basic) if the property has arguments and if the name of the property or one of its accessors matches the name specified by the DefaultMemberAttribute. If the DefaultMemberAttribute is not present on the containing type, then the type does not have an indexer. The C# compiler emits the DefaultMemberAttribute on any type containing an indexer. In C# it is an error to manually attribute a type with the DefaultMemberAttribute if the type also declares an indexer.
The following example uses the DefaultMemberAttribute attribute to make the Age property the default member of the MyClass class.
using namespace System; using namespace System::Reflection; using namespace System::IO; [DefaultMemberAttribute("Age")] public ref class MyClass { public: void Name( String^ s ){} property int Age { int get() { return 20; } } }; int main() { try { Type^ myType = MyClass::typeid; array<MemberInfo^>^memberInfoArray = myType->GetDefaultMembers(); if ( memberInfoArray->Length > 0 ) { System::Collections::IEnumerator^ myEnum = memberInfoArray->GetEnumerator(); while ( myEnum->MoveNext() ) { MemberInfo^ memberInfoObj = safe_cast<MemberInfo^>(myEnum->Current); Console::WriteLine( "The default member name is: {0}", memberInfoObj ); } } else { Console::WriteLine( "No default members are available." ); } } catch ( InvalidOperationException^ e ) { Console::WriteLine( "InvalidOperationException: {0}", e->Message ); } catch ( IOException^ e ) { Console::WriteLine( "IOException: {0}", e->Message ); } catch ( Exception^ e ) { Console::WriteLine( "Exception: {0}", e->Message ); } }
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.



