public static String GetDestinations(String sourceId)
 {
     try
     {
         ClsBAL objBAL = new ClsBAL();
         DataSet ObjDataset = objBAL.GetDestinations(sourceId);
         StringBuilder sbDestinations = new StringBuilder();
         if (ObjDataset != null)
         {
             if (ObjDataset.Tables.Count > 0)
             {
                 DataTable dtDestinations = ObjDataset.Tables[0];
                 HttpContext.Current.Session["sesDTDestinations"] = dtDestinations;
                 sbDestinations.Append("<select id=\"ddldestinationsDiv\" name=\"ddldestinationsDiv\" style=\"width:130px;\" >");
                 sbDestinations.Append("<option value=''>----------</option>");
                 if (dtDestinations.Rows.Count > 0)
                 {
                     foreach (DataRow item in dtDestinations.Rows)
                     {
                         sbDestinations.Append("<option value=" + item["ID"].ToString() + ">" + item["DestinationName"].ToString() + "</option>");
                     }
                 }
                 sbDestinations.Append("</select>");
             }
         }
         return sbDestinations.ToString();
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }
 protected void ddlSources_SelectedIndexChanged(object sender, EventArgs e)
 {
     try
     {
         ddlDestinations.Items.Clear();
         ddlDestinations.Items.Insert(0, "----------");
         if (ddlSources.SelectedIndex != 0 && ddlSources.SelectedItem.Value != "----------")
         {
             string str = ddlSources.SelectedItem.Value.ToString();
             objBAL = new ClsBAL();
             objDataSet = objBAL.GetDestinations(str);
             if (objDataSet != null)
             {
                 if (objDataSet.Tables.Count > 0)
                 {
                     if (objDataSet.Tables[0].Rows.Count > 0)
                     {
                         Session["sesDTDestinations"] = objDataSet.Tables[0];
                         ddlDestinations.Items.Clear();
                         ddlDestinations.DataSource = objDataSet.Tables[0];
                         ddlDestinations.DataTextField = "DestinationName";
                         ddlDestinations.DataValueField = "ID";
                         ddlDestinations.DataBind();
                         ddlDestinations.Items.Insert(0, "----------");
                     }
                 }
             }
         }
     }
     catch (Exception)
     {
         throw;
     }
 }