ex-19-04

Programming Csharp Source Code(代码) Programming Csharp Source Code

// Example 19-04: The remoting Calculator client

namespace Programming_CSharp
{
   using System;
   using System.Runtime.Remoting;
   using System.Runtime.Remoting.Channels;
   using System.Runtime.Remoting.Channels.Http;
    
   public class CalcClient 
   {
      public static void Main()
      {

         int[] myIntArray = new int[3];

         Console.WriteLine("Watson, come here I need you...");

         // create an Http channel and register it
         // uses port 0 to indicate won't be listening
         HttpChannel chan = new HttpChannel(0);
         ChannelServices.RegisterChannel(chan);

         // get my object from across the http channel
         MarshalByRefObject obj =
          (MarshalByRefObject)  RemotingServices.Connect
            (typeof(Programming_CSharp.ICalc), 
            "http://localhost:65100/theEndPoint");

         try
         {
            // cast the object to our interface
            Programming_CSharp.ICalc calc = 
               obj as Programming_CSharp.ICalc;

            // use the interface to call methods
            double sum = calc.Add(3.0,4.0);
            double difference = calc.Sub(3,4);
            double product = calc.Mult(3,4);
            double quotient = calc.Div(3,4);

            // print the results 
            Console.WriteLine("3+4 = {0}", sum);
            Console.WriteLine("3-4 = {0}", difference);
            Console.WriteLine("3*4 = {0}", product);
            Console.WriteLine("3/4 = {0}", quotient);
         }
         catch( System.Exception ex )
         {
            Console.WriteLine("Exception caught: ");
            Console.WriteLine(ex.Message);
         }
      }
   }
}