C# 0 The Complete Reference

PART I

C h a p t e r   1 7 :  

R u n t i m e   T y p e   I D ,   R e f l e c t i o n ,   a n d   A t t r i b u t e s  

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PART IPART I

          Console.WriteLine("14 is between x and y");

      }

      else if(m.Name.CompareTo("Show")==0) {

        m.Invoke(reflectOb, null);

      }

    }

  }

}

The output is shown here:

Invoking methods in MyClass

sum is 30

14 is between x and y

Inside Set(int, int). Values are x: 9, y: 18

Inside Set(double, double). Values are x: 1, y: 23

Values are x: 1, y: 23

Look closely at how the methods are invoked. First, a list of methods is obtained. Then, 

inside the 

foreach

 loop, parameter information is retrieved. Next, using a series of if/else 

statements, each method is executed with the proper type and number of arguments. Pay 

special attention to the way that the overloaded 

Set( )

 method is executed by the following 

code:

if(m.Name.CompareTo("Set")==0 &&

   pi[0].ParameterType == typeof(int)) {

  object[] args = new object[2];

  args[0] = 9;

  args[1] = 18;

  m.Invoke(reflectOb, args);

}

else if(m.Name.CompareTo("Set")==0 &&

  pi[0].ParameterType == typeof(double)) {

  object[] args = new object[2];

  args[0] = 1.12;

  args[1] = 23.4;

  m.Invoke(reflectOb, args);

}

If the name of the method is 

Set

, then the type of the first parameter is tested to determine 

which version of the method was found. If it was