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Type.GetMethod Method (String, Type[])

Updated: September 2009

Searches for the specified public method whose parameters match the specified argument types.

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

public MethodInfo GetMethod(
	string name,
	Type[] types
)

Parameters

name
Type: System.String

The String containing the name of the public method to get.

types
Type: System.Type[]

An array of Type objects representing the number, order, and type of the parameters for the method to get.

-or-

An empty array of Type objects (as provided by the EmptyTypes field) to get a method that takes no parameters.

Return Value

Type: System.Reflection.MethodInfo
A MethodInfo object representing the public method whose parameters match the specified argument types, if found; otherwise, null.

Implements

_Type.GetMethod(String, Type[])

ExceptionCondition
AmbiguousMatchException

More than one method is found with the specified name and specified parameters.

ArgumentNullException

name is null.

-or-

types is null.

-or-

One of the elements in types is null.

ArgumentException

types is multidimensional.

The search for name is case-sensitive. The search includes public static and public instance methods.

NoteNote:

You cannot omit parameters when looking up constructors and methods. You can only omit parameters when invoking.

If the current T:System.Type represents a constructed generic type, this method returns the MethodInfo with the type parameters replaced by the appropriate type arguments.

If the current Type represents a type parameter in the definition of a generic type or generic method, this method searches the methods of the class constraint, or the methods of Object if there is no class constraint.

NoteNote:

The name parameter cannot include type arguments. For example, the C# code GetMethod("MyGenericMethod<int>") searches for a method with the text name "MyGenericMethod<int>", rather than for a method named MyGenericMethod that has one generic argument of type int.

The following example finds specific overloads of MethodA, specifying a variety of argument types.

NoteNote:

The Visual C# 2005 example requires the /unsafe compiler option.

using System;
using System.Reflection;

class Program
{
    // Methods to get: 

    public void MethodA(int i, int j) { }

    public void MethodA(int[] i) { }

    public unsafe void MethodA(int* i) { }

    public void MethodA(ref int r) {}

    // Method that takes an out parameter: 
    public void MethodA(int i, out int o) { o = 100;}


  static void Main(string[] args)
  {
    MethodInfo mInfo;

    // Get MethodA(int i, int i)
    mInfo = typeof(Program).GetMethod("MethodA",
        new Type[] { typeof(int), typeof(int) });
    Console.WriteLine("Found method: {0}", mInfo);

    // Get MethodA(int[] i)
    mInfo = typeof(Program).GetMethod("MethodA",
        new Type[] { typeof(int[]) });
    Console.WriteLine("Found method: {0}", mInfo);

    // Get MethodA(int* i)
    mInfo = typeof(Program).GetMethod("MethodA",
        new Type[] { typeof(int).MakePointerType() });
    Console.WriteLine("Found method: {0}", mInfo);

    // Get MethodA(ref int r)
    mInfo = typeof(Program).GetMethod("MethodA",
        new Type[] { typeof(int).MakeByRefType() });
    Console.WriteLine("Found method: {0}", mInfo);

    // Get MethodA(int i, out int o)
    mInfo = typeof(Program).GetMethod("MethodA",
        new Type[] { typeof(int), typeof(int).MakeByRefType() });
    Console.WriteLine("Found method: {0}", mInfo);

  }
}

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, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Date

History

Reason

September 2009

Removed an erroneous statement that null is returned for non-public members outside the assembly, if caller lacks ReflectionPermission.

Content bug fix.

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