Web Forms :: Where To Get The Data Posted From The Client

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
public partial class ResponseTest : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
var a = Request; //I didn't find the data in Request's structure.
Response.Write("successed; hello World;");
}
}
//-----------------------javascript--------------
for( var i=0; i<this.dataToBeSent.length && this.dataToBeSent[i].hasSent == false; i++ )
{
xmlRequest.open("POST",this.dataToBeSent[i].url,true);
xmlRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlRequest.setRequestHeader("Content-length", this.dataToBeSent[i].data.length);
xmlRequest.setRequestHeader("Connection", "close");
xmlRequest.onreadystatechange = function()
{
var j = j || i;
if(xmlRequest.readyState == 4 && xmlRequest.status == 200)
{
if( xmlRequest.responseText.toLowerCase().indexOf("successed") > -1 )
{
this.dataToBeSent[i].hasSent = true;
}
}
};
xmlRequest.send(this.dataToBeSent[i].data); // xml data
}