Passing Session Variables to a Webservice for Autocomplete extender

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session

webservice

Hi, all
I have written code for autocomplete extender for dynamic textboxes. Now i want to pass a session variables for this autocomplete extender webservice. I am not calling the webservice through aspx.cs code, it is coming dynamically. While user logged in, then my Session is created. Now i Want to send this session to the particular autocomplete extender Webservice Method. Any one plz help me.

This is My code

<pre>[WebMethod ]
    public string[] GetCompletionList(string prefixText, int count)
    {
         DataSet ds = new DataSet();
        DataTable dt = new DataTable();
        cn.ConnectionString = Connection;
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = cn;
        cmd.CommandType = CommandType.Text;
       
        prefixText = "%" + prefixText + "%";
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.CommandText = "spName";
        cmd.Parameters.AddWithValue("@iAccountId", Convert.ToInt32(
Session["iAccountId"].ToString()));
//Here iam getting Session["iAccountId"]=null
       cmd.Parameters.AddWithValue("@PrefixText", prefixText);
       try
        {
            cn.Open();
            cmd.ExecuteNonQuery();
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            da.Fill(ds);
        }
        catch
        {
        }
        finally
        {
            cn.Close();
        }
        dt = ds.Tables[0];
        //Then return List of string(txtItems) as result
        List<string> txtItems = new List<string>();
        String dbValues;
        foreach (DataRow row in dt.Rows)
        {
            //String From DataBase(dbValues)
            dbValues = row["vcRemarks"].ToString();
            //dbValues = dbValues.ToLowerInvariant ();
            txtItems.Add(dbValues);
        }
        return txtItems.ToArray();
    }

Thanks in Advance

Murthy