This topic has not yet been rated - Rate this topic

Marshal.GetITypeInfoForType Method

.NET Framework 3.0

Returns an ITypeInfo interface from a managed type.

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

public static IntPtr GetITypeInfoForType (
	Type t
)

public static IntPtr GetITypeInfoForType (
	Type t
)

JScript

public static function GetITypeInfoForType (
	t : Type
) : IntPtr

XAML

Not applicable.

Parameters

t: The Type whose ITypeInfo interface is being requested.

Return Value

The ITypeInfo pointer for the t parameter.

Exceptions

Exception type	Condition
ArgumentException	t is not a visible type to COM.
COMException	A type library is registered for the assembly that contains the type, but the type definition cannot be found.

Remarks

This method returns a pointer to an ITypeInfo implementation that is based on the original type. Calling an object with GetITypeInfoForType causes the reference count to increment on the interface pointer before the pointer is returned. Always use Marshal.Release to decrement the reference count once you have finished with the pointer. You can apply the System.Runtime.InteropServices.MarshalAsAttribute to replace standard interop marshaling behavior with this custom marshaler. For additional information about ITypeInfo, see the MSDN library.

Note:
This method uses SecurityAction.LinkDemand to prevent it from being called from untrusted code; only the immediate caller is required to have SecurityPermissionAttribute.UnmanagedCode permission. If your code can be called from partially trusted code, do not pass user input to Marshal class methods without validation. For important limitations on using the LinkDemand member, see Demand vs. LinkDemand.

Note:

This method uses SecurityAction.LinkDemand to prevent it from being called from untrusted code; only the immediate caller is required to have SecurityPermissionAttribute.UnmanagedCode permission. If your code can be called from partially trusted code, do not pass user input to Marshal class methods without validation. For important limitations on using the LinkDemand member, see Demand vs. LinkDemand.

Example

The following code example demonstrates how to retrieve a pointer to the ITypeInfo interface for a type using the GetITypeInfoForType method.

using System;
using System.Runtime.InteropServices;

class Program
{

    static void Run()
    {
        Console.WriteLine("Calling Marshal.GetITypeInfoForType...");

        // Get the ITypeInfo pointer for an Object type
        IntPtr pointer = Marshal.GetITypeInfoForType(typeof(object));

        Console.WriteLine("Calling Marshal.Release...");

        // Always call Marshal.Release to decrement the reference count.
        Marshal.Release(pointer);
    }

    static void Main(string[] args)
    {
        Run();
    }
}

.NET Framework Security

SecurityPermission for permission to call unmanaged code. Associated enumeration: UnmanagedCode Security action: LinkDemand

Platforms

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

Reference

Marshal Class
Marshal Members
System.Runtime.InteropServices Namespace
GetTypeForITypeInfo
MarshalAsAttribute

Did you find this helpful? Yes No

Not accurate

Not enough depth

Need more code examples

(1500 characters remaining)

Community Additions

ADD