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Type::GetTypeHandle Method (Object^)

.NET Framework (current version)
 

Gets the handle for the Type of a specified object.

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

C#
C++
F#
VB
Copy 
public:
static RuntimeTypeHandle GetTypeHandle(
	Object^ o
)

Parameters

o
Type: System::Object^

The object for which to get the type handle.

Return Value

Type: System::RuntimeTypeHandle

The handle for the Type of the specified Object.

Exception Condition
ArgumentNullException

o is null.

The handles are valid only in the application domain in which they were obtained.

The following example defines the class MyClass1, gets an instance of it, and retrieves the runtime handle of the object.

C#
C++
VB
Copy 
using namespace System;
using namespace System::Reflection;

public ref class MyClass1
{
private:
    int x;

public:
    int MyMethod()
    {
        return x;
    }
};

int main()
{
    MyClass1^ myClass1 = gcnew MyClass1;

    // Get the RuntimeTypeHandle from an object.
    RuntimeTypeHandle myRTHFromObject = Type::GetTypeHandle( myClass1 );

    // Get the RuntimeTypeHandle from a type.
    RuntimeTypeHandle myRTHFromType = MyClass1::typeid->TypeHandle;

    Console::WriteLine( "\nmyRTHFromObject.Value:  {0}", myRTHFromObject.Value );
    Console::WriteLine( "myRTHFromObject.GetType():  {0}", myRTHFromObject.GetType() );
    Console::WriteLine( "Get the type back from the handle..." );
    Console::WriteLine( "Type::GetTypeFromHandle(myRTHFromObject):  {0}", 
        Type::GetTypeFromHandle(myRTHFromObject) );

    Console::WriteLine( "\nmyRTHFromObject.Equals(myRTHFromType):  {0}", 
        myRTHFromObject.Equals(myRTHFromType) );

    Console::WriteLine( "\nmyRTHFromType.Value:  {0}", myRTHFromType.Value );
    Console::WriteLine( "myRTHFromType.GetType():  {0}", myRTHFromType.GetType() );
    Console::WriteLine( "Get the type back from the handle..." );
    Console::WriteLine( "Type::GetTypeFromHandle(myRTHFromType):  {0}", 
        Type::GetTypeFromHandle(myRTHFromType) );
}

/* This code example produces output similar to the following:

myRTHFromObject.Value:  3295832
myRTHFromObject.GetType():  System.RuntimeTypeHandle
Get the type back from the handle...
Type::GetTypeFromHandle(myRTHFromObject):  MyClass1

myRTHFromObject.Equals(myRTHFromType):  True

myRTHFromType.Value:  3295832
myRTHFromType.GetType():  System.RuntimeTypeHandle
Get the type back from the handle...
Type::GetTypeFromHandle(myRTHFromType):  MyClass1
 */

.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 7.0
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