ParameterInfo.IsOut Property

Property Value

Type: System.Boolean
true if the parameter is an output parameter; otherwise, false.

Imports System.Reflection
Imports System.Runtime.InteropServices

Class Example

   Public Shared Sub mymethod(ByVal int1m As Integer, <Out> ByRef str2m As String, _
                              ByRef str3m As String)
      str2m = "in mymethod"
   End Sub

   Public Shared Function Demo(ByVal outputBlock As System.Windows.Controls.TextBlock) As Integer

      outputBlock.Text &= "Reflection.Parameterinfo" & vbCrLf

      'Get the type.
      Dim Mytype As Type = GetType(Example)

      'Get and display the method.
      Dim Mymethodbase As MethodBase = Mytype.GetMethod("mymethod")
      outputBlock.Text &= "Mymethodbase = " & Mymethodbase.ToString() & vbLf

      'Get the ParameterInfo array.
      Dim Myarray As ParameterInfo() = Mymethodbase.GetParameters()

      'Get and display the IsOut of each parameter.
      Dim Myparam As ParameterInfo
      For Each Myparam In Myarray
         outputBlock.Text &= "For parameter # " & Myparam.Position.ToString() _
            & ", the value of IsOut is - " & Myparam.IsOut.ToString() & vbLf
      Next Myparam
      Return 0
   End Function
End Class

' This code produces the following output:
'
' Reflection.ParameterInfo
'  
' Mymethodbase = Void mymethod (Int32, System.String ByRef, System.String ByRef)
' For parameter # 0, the value of IsOut is - False
' For parameter # 1, the value of IsOut is - True
' For parameter # 2, the value of IsOut is - False 

using System;
using System.Reflection;

class Example
{
   public static void mymethod(
      int int1m, out string str2m, ref string str3m)
   {
      str2m = "in mymethod";
   }

   public static int Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      outputBlock.Text += "\nReflection.Parameterinfo" + "\n";

      //Get the ParameterInfo parameter of a function.

      //Get the type.
      Type Mytype = Type.GetType("Example");

      //Get and display the method.
      MethodBase Mymethodbase = Mytype.GetMethod("mymethod");
      outputBlock.Text += "\nMymethodbase = " + Mymethodbase;

      //Get the ParameterInfo array.
      ParameterInfo[] Myarray = Mymethodbase.GetParameters();

      //Get and display the IsOut of each parameter.
      foreach (ParameterInfo Myparam in Myarray)
      {
         outputBlock.Text += "\nFor parameter # " + Myparam.Position
            + ", the IsOut is - " + Myparam.IsOut;
      }
      return 0;
   }
}
/*
This code produces the following output:

Reflection.ParameterInfo

Mymethodbase = Void mymethod (Int32, System.String ByRef, System.String ByRef)
For parameter # 0, the IsOut is - False
For parameter # 1, the IsOut is - True
For parameter # 2, the IsOut is - False
*/