Type.GetMethod Method (String, BindingFlags, Binder, array<Type[], array<ParameterModifier[])

Parameters

• name
  Type: System.String
  The String containing the name of the method to get.

• bindingAttr
  Type: System.Reflection.BindingFlags
  A bitmask comprised of one or more BindingFlags that specify how the search is conducted.
  -or-
  Zero, to return nulla null reference (Nothing in Visual Basic).

• binder
  Type: System.Reflection.Binder
  A Binder object that defines a set of properties and enables binding, which can involve selection of an overloaded method, coercion of argument types, and invocation of a member through reflection.
  -or-
  A null reference (Nothing in Visual Basic), to use the DefaultBinder.

• types
  Type: array<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.

• modifiers
  Type: array<System.Reflection.ParameterModifier[]
  An array of ParameterModifier objects representing the attributes associated with the corresponding element in the types array. To be only used when calling through COM interop, and only parameters that are passed by reference are handled. The default binder does not process this parameter.

Return Value

Type: System.Reflection.MethodInfo
A MethodInfo object representing the method that matches the specified requirements, if found; otherwise, nulla null reference (Nothing in Visual Basic).

Imports System.Reflection
Imports System.Runtime.InteropServices

Class Example

   ' Methods to get:

   Public Overloads Sub MethodA(ByVal i As Integer, ByVal l As Long)

   End Sub

   Public Overloads Sub MethodA(ByVal i() As Integer)

   End Sub

   Public Overloads Sub MethodA(ByRef r As Integer)

   End Sub

   ' Method that takes an out parameter. Note that an Imports
   ' reference is needed to System.Runtime.InteropServices 
   ' for the <OutAttribute>, which can be shortened to <Out>.
   Public Overloads Sub MethodA(ByVal i As Integer, <Out()> ByRef o As Integer)
      o = 100
   End Sub

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      Dim mInfo As MethodInfo

      ' Get MethodA(ByVal i As Integer, ByVal l As Long)
      mInfo = GetType(Example).GetMethod("MethodA", _
          BindingFlags.Public Or BindingFlags.Instance, _
          Nothing, _
          New Type() {GetType(System.Int32), _
          GetType(System.Int64)}, _
          Nothing)
      outputBlock.Text += String.Format("Found method: {0}", mInfo) & vbCrLf

      ' Get MethodA(ByVal i() As Integer)
      mInfo = GetType(Example).GetMethod("MethodA", _
          BindingFlags.Public Or BindingFlags.Instance, _
          Nothing, _
          New Type() {GetType(System.Int32())}, _
          Nothing)
      outputBlock.Text += String.Format("Found method: {0}", mInfo) & vbCrLf

      ' Get MethodA(ByRef r As Integer)
      mInfo = GetType(Example).GetMethod("MethodA", _
          BindingFlags.Public Or BindingFlags.Instance, _
          Nothing, _
          New Type() {GetType(System.Int32).MakeByRefType}, _
          Nothing)
      outputBlock.Text += String.Format("Found method: {0}", mInfo) & vbCrLf

      ' Get MethodA(ByVal i As Integer, <Out()> ByRef o As Integer)
      mInfo = GetType(Example).GetMethod("MethodA", _
          BindingFlags.Public Or BindingFlags.Instance, _
          Nothing, _
          New Type() {GetType(System.Int32), GetType(System.Int32).MakeByRefType}, _
          Nothing)
      outputBlock.Text += String.Format("Found method: {0}", mInfo) & vbCrLf

   End Sub
End Class

' This method produces the following output:
'
'Found method: Void MethodA(Int32, Int32)
'Found method: Void MethodA(Int32[])
'Found method: Void MethodA(Int32 ByRef)
'Found method: Void MethodA(Int32, Int32 ByRef)

using System;
using System.Reflection;

class Example
{
   // Methods to get:

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

   public 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; }


   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      MethodInfo mInfo;

      // Get MethodA(int i, int j)
      mInfo = typeof(Example).GetMethod("MethodA",
          BindingFlags.Public | BindingFlags.Instance,
          null,
          new Type[] { typeof(int), typeof(int) },
          null);
      outputBlock.Text += String.Format("Found method: {0}", mInfo) + "\n";

      // Get MethodA(int[] i)
      mInfo = typeof(Example).GetMethod("MethodA",
          BindingFlags.Public | BindingFlags.Instance,
          null,
          new Type[] { typeof(int[]) },
          null);
      outputBlock.Text += String.Format("Found method: {0}", mInfo) + "\n";

      // Get MethodA(ref int r)
      mInfo = typeof(Example).GetMethod("MethodA",
          BindingFlags.Public | BindingFlags.Instance,
          null,
          new Type[] { typeof(int).MakeByRefType() },
          null);
      outputBlock.Text += String.Format("Found method: {0}", mInfo) + "\n";

      // Get MethodA(int i, out int o)
      mInfo = typeof(Example).GetMethod("MethodA",
          BindingFlags.Public | BindingFlags.Instance,
          null,
          new Type[] { typeof(int), typeof(int).MakeByRefType() },
          null);
      outputBlock.Text += String.Format("Found method: {0}", mInfo) + "\n";

   }
}

/* This method produces the following output:

Found method: Void MethodA(Int32, Int32)
Found method: Void MethodA(Int32[])
Found method: Void MethodA(Int32 ByRef)
Found method: Void MethodA(Int32, Int32 ByRef)
  */