Gets the handle for the Type of a specified object.
Namespace:
System
Assembly:
mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
Public Shared Function GetTypeHandle ( _
o As Object _
) As RuntimeTypeHandle
Dim o As Object
Dim returnValue As RuntimeTypeHandle
returnValue = Type.GetTypeHandle(o)
public static RuntimeTypeHandle GetTypeHandle(
Object o
)
public:
static RuntimeTypeHandle GetTypeHandle(
Object^ o
)
public static function GetTypeHandle(
o : Object
) : RuntimeTypeHandle
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.
Imports System
Imports System.Reflection
Public Class MyClass1
Private x As Integer = 0
Public Function MyMethod() As Integer
Return x
End Function 'MyMethod
End Class
Public Class MyClass2
Public Shared Sub Main()
Dim myClass1 As New MyClass1()
' Get the RuntimeTypeHandle from an object.
Dim myRTHFromObject As RuntimeTypeHandle = Type.GetTypeHandle(myClass1)
' Get the RuntimeTypeHandle from a type.
Dim myRTHFromType As RuntimeTypeHandle = GetType(MyClass1).TypeHandle
Console.WriteLine(vbLf & "myRTHFromObject.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(vbLf & "myRTHFromObject.Equals(myRTHFromType): {0}", _
myRTHFromObject.Equals(myRTHFromType))
Console.WriteLine(vbLf & "myRTHFromType.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))
End Sub
End Class
' This code example produces output similar to the following:
'
'myRTHFromObject.Value: 7549720
'myRTHFromObject.GetType(): System.RuntimeTypeHandle
'Get the type back from the handle...
'Type.GetTypeFromHandle(myRTHFromObject): MyClass1
'
'myRTHFromObject.Equals(myRTHFromType): True
'
'myRTHFromType.Value: 7549720
'myRTHFromType.GetType(): System.RuntimeTypeHandle
'Get the type back from the handle...
'Type.GetTypeFromHandle(myRTHFromType): MyClass1
using System;
using System.Reflection;
public class MyClass1
{
private int x=0;
public int MyMethod()
{
return x;
}
}
public class MyClass2
{
public static void Main()
{
MyClass1 myClass1 = new MyClass1();
// Get the RuntimeTypeHandle from an object.
RuntimeTypeHandle myRTHFromObject = Type.GetTypeHandle(myClass1);
// Get the RuntimeTypeHandle from a type.
RuntimeTypeHandle myRTHFromType = typeof(MyClass1).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: 799464
myRTHFromObject.GetType(): System.RuntimeTypeHandle
Get the type back from the handle...
Type.GetTypeFromHandle(myRTHFromObject): MyClass1
myRTHFromObject.Equals(myRTHFromType): True
myRTHFromType.Value: 799464
myRTHFromType.GetType(): System.RuntimeTypeHandle
Get the type back from the handle...
Type.GetTypeFromHandle(myRTHFromType): MyClass1
*/
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
*/
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
Reference