How to Make Customise AJAX Request in Asp.net

var AjaxServerPageName = "AjaxServer.aspx";

function CreateXmlReq()

{

    try

    {

         XmlReq = new ActiveXObject("Msxml2.XMLHTTP");

    }

    catch(e)

    {

         try

         {

             XmlReq = new ActiveXObject("Microsoft.XMLHTTP");

         }

         catch(oc)

         {

             XmlReq = null;

         }

    }

    if(!XmlReq && typeof XMLHttpRequest != "undefined")

    {

         XmlReq = new XMLHttpRequest();

    }

}

function FetchDGContents(prod_id,ProdName,weight_id,Weight_value,ProdQty,Show_Amount,amt,TotalAmt,action,QtyId,Gmw_id,weight,Gm_w_id)

{

    debugger;

    var ProdId = prod_id;

    var P_Name = ProdName;

    var WeightId = weight_id.id;

    var WeightValue = Weight_value;

    var ProdAmt = amt;

    var TotAmt = TotalAmt;

    var ShowAmount = Show_Amount;

    var Trigger = action

    var Qty = ProdQty;

    var Qty_id = QtyId;

    var Gmwid = Gmw_id;

   

    var requestUrl = AjaxServerPageName + "?ProdId=" + encodeURIComponent(ProdId) + "&ProdName=" + encodeURIComponent(P_Name) + "&WeightId=" + encodeURIComponent(WeightId)+ "&WeightValue=" + encodeURIComponent(WeightValue)+ "&ProdAmt=" + encodeURIComponent(ProdAmt)+ "&TotAmt=" + encodeURIComponent(TotAmt)+ "&Trigger=" + encodeURIComponent(Trigger)+ "&ShowAmount=" + encodeURIComponent(ShowAmount)+ "&Qty=" + encodeURIComponent(Qty)+ "&Qty_id=" + encodeURIComponent(Qty_id)+ "&Gmwid=" + encodeURIComponent(Gmwid)+ "&weight=" + encodeURIComponent(weight)+ "&Gm_w_id=" + encodeURIComponent(Gm_w_id);

    CreateXmlReq();

    if(XmlReq)

    {

         XmlReq.onreadystatechange = HandleResponse;

         XmlReq.open("GET", requestUrl, true);

         XmlReq.send();       

    }

}

function HandleResponse()

{

    if(XmlReq.readyState == 4)

    {

         if(XmlReq.status == 200)

         {       

//           var tbl = document.getElementById('DataGrid1').getElementsByTagName("tbody")[0];   

////         // Before filling new contents into the DataGrid, clear the cotents by calling this function

////         ClearTable(tbl);

////         // Fill the cleared Datagrid with new XML Reponse

////         FillTable(XmlReq.responseXML.documentElement,tbl);

             // Hides the Process Image Table after displaying the contents

             //imgtbl.style.visibility = 'hidden';

//           alert('hello');

         }

         else

         {

             alert("There was a problem retrieving data from the server." );

         }

    }

}

Given Blow code should be in AjaxPage.aspx.vb/ C# file (as accordingly syntax)

#Region " Web Form Designer Generated Code "

        'This call is required by the Web Form Designer.

        <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

        End Sub

        Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init

            'CODEGEN: This method call is required by the Web Form Designer

            'Do not modify it using the code editor.

            InitializeComponent()

        End Sub

#End Region

        Dim chString, choice As String

       

 Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

          If Not IsPostBack Then

           temptable()'should return any xml format 

            Else

                Response.Clear()

                Response.End()

            End If

  End Sub­­­­

Public Sub temptable()

Dim tabletest As New DataTable()

 Dim coltest As DataColumn = New DataColumn("Test")

 coltest.DataType = System.Type.GetType("System.String")

            tabletest.Columns.Add(coltest)

            Dim rowtest As DataRow = tabletest.NewRow()

            rowtest(coltest) = "Hello"

            tabletest.Rows.Add(rowtest)

            Dim ds As DataSet = New DataSet()

            ds.Tables.Add(tabletest)

            chString = ds.GetXml()

            ds.Clear()

            Response.Clear()

            Response.ContentType = "text/xml"

            Response.Write(chString)

            Response.End()

        End Sub