Ajax - Fetching Records from DB

[sonia sardana]

I have dropdown & Gridview on FrmSatelliteMain,In dropdown DataValueField uid is there,Now i want that as the user selects
the value in dropdown ,on basis of uid i will fetch the records fromm DB & bind to Gridview using AJAX.

Plz frnds dont tell me dat,dat do it using AJAX framework!!!!!

public partial class FrmSatelliteMain : System.Web.UI.Page
{
    SqlConnection conn = new SqlConnection("Data Source=(local);Initial catalog=SatelliteTVonPV;User ID=sonia;Password=sonia");
    string Query;
    SqlCommand cmd;
       SqlDataReader dr;

    protected void Page_Load(object sender, EventArgs e)
    {
      
        if (!IsPostBack)
        {
            DropDownLanguages.Attributes.Add("onChange", "javascript:return AddChannels()"); 

        }
    }


}

SOURCE CODE-
In DropDownLanguages in DataValueField,UID is there.I want to retrive all the records from DB that has UID 1 in country column.

<script type ="text/javascript" language ="javascript">
    var xmlHttp;
         
    
    function AddChannels()
    {
             
      checkXHR("Retrieve.aspx?&uid="+document.getElementById("DropDownLanguages").value);
}

     function checkXHR(url)
    {
       try
       {
         xmlHttp=new XMLHttpRequest();        
       }
       catch (e)
       {
         try
         {
            xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
         }
         catch (e)
         {
            try
            {
                xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");                
            }
            catch (e)
            {
                alert("Your browser does not support AJAX!");
                return false;
            }
         }
       }
      
       xmlHttp.open("GET",url,false);       
       xmlHttp.onreadystatechange=statechanged;
       xmlHttp.send(null);
    }
    
    function statechanged()
    {
       if(xmlHttp.readyState==4)
       {
         document.getElementById("hd1").value = xmlHttp.responseText;
       }
       else
       {
         document.getElementById("hd1").value="";
       }         
    }

FRMRETRIVE.aspx

public partial class Retrieve : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        SqlDataAdapter da = new SqlDataAdapter("select * from [pctv] where Country='" +
                         Request["uid"].ToUpper() + "'", conn);
        DataSet ds = new DataSet();
        da.Fill(ds);
    }
}

In FrmRetrive form load,Records are coming,But i dont know that how to bind this data with Gridview of FrmSatelliteMain!! Can somebody tell me dat???????????I want to bind all the columns excluding UID,category & Country!!

DB Columns
UID
Country
Category
Language
Channel Name
Channel URL
TV RATING