Basic Socket Programming in C#

using System;
using System.Net.Sockets;
using System.Text;
namespace Cons
{
 class Program
 {
  static void Main(string[] args)
  {
   TcpListener serverSocket = new TcpListener(8888);
   int requestCount = 0;
   TcpClient clientSocket = default(TcpClient);
   serverSocket.Start();
   Console.WriteLine(" >> Server Started");
   clientSocket = serverSocket.AcceptTcpClient();
   Console.WriteLine(" >> Accept connection from client");
   requestCount = 0;
   while ((true))
   {
    try
    {
     requestCount = requestCount + 1;
     NetworkStream networkStream = clientSocket.GetStream();
     byte[] bytesFrom = new byte[10025];
     networkStream.Read(bytesFrom, 0,
     (int)clientSocket.ReceiveBufferSize);
     string dataFromClient =
     System.Text.Encoding.ASCII.GetString(bytesFrom);
     dataFromClient = dataFromClient.Substring(0,
     dataFromClient.IndexOf("$"));
     Console.WriteLine(" >> Data from client - " +
     dataFromClient);
     string serverResponse = "Server response " +
     Convert.ToString(requestCount);
     Byte[] sendBytes =
     Encoding.ASCII.GetBytes(serverResponse);
     networkStream.Write(sendBytes, 0, sendBytes.Length);
     networkStream.Flush();
     Console.WriteLine(" >> " + serverResponse);
    }
    catch (Exception ex)
    {
     Console.WriteLine(ex.ToString());
    }
   }
   clientSocket.Close();
   serverSocket.Stop();
   Console.WriteLine(" >> exit");
   Console.ReadLine();
  }
 }
}

Oppourtunity Count for MSCRM4

This is a javascript which calculates the number of opportunities and displays in the navigation.

// OPPOURTUNITY COUNT_______________________
var OPPOURTUNITY_COUNT_ACC = function () {
if (crmForm.FormType != 1) {
var objectidguid = crmForm.ObjectId;
try{        
var OpprNavTxt = document.getElementById('navOpps').getElementsByTagName('NOBR')[0].innerText;
}
catch(e){ return; }

var fxml = "<fetch mapping='logical'><entity name='account'><no-attrs/><filter type='and'><condition attribute='accountid' operator='eq' value='" + objectidguid + "'/></filter><link-entity name='opportunity' from='customerid' to='accountid'><attribute name='name'/></link-entity></entity></fetch>";

var soap7 = "";
soap7 += GenerateAuthenticationHeader();
soap7 += "";
soap7 += fxml;
soap7 += "";
var XmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
XmlHttp.open("POST", "/mscrmservices/2007/CrmService.asmx", false);
XmlHttp.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
XmlHttp.setRequestHeader("SOAPAction", "http://schemas.microsoft.com/crm/2007/WebServices/Fetch");
XmlHttp.setRequestHeader("Content-Length", soap7.length);
XmlHttp.send(soap7);
var resultText = XmlHttp.responseXML.text;
var oXmlDoc = new ActiveXObject("Microsoft.XMLDOM");
oXmlDoc.async = false;
oXmlDoc.loadXML(resultText);
var results = oXmlDoc.getElementsByTagName('result');
var no_of_opp = results.length;
document.getElementById('navOpps').getElementsByTagName('NOBR')[0].innerText = OpprNavTxt + " (" + no_of_opp + ")";
}
};

Create an indexer property

This C# code snippet creates an indexer property which can be used to access the class as if it were an array. The Dictionary is not required, but is used only as example. Any class which can be viewed logically as an array could have an indexer.

using System.Collections.Generic;
...
class Client
{
   private Dictionary invoices 
      = new Dictionary();
 
   public void Add (int id, string value)
      { invoices.Add (id, value); }
 
   public string this [int id]      // indexer
   {            
      get { return invoices[id]; }
      set { invoices[id] = value; }
   }
}
 
public class Test
{
   public static void Main( )
   {
      Client client = new Client();
      client.Add (1, "I005238A");
      Console.WriteLine ("Invoice: " + client[1]); // indexer access
    } 
}