protected void ddl_Customer_SelectedIndexChanged(object sender, EventArgs e) { List <Customer> Obj_Customer = CustomerBiz.GetCustomerDetails(ddl_Customer.SelectedValue); if (Obj_Customer != null && Obj_Customer.Count > 0) { for (int i = 0; i < Obj_Customer.Count; i++) { txtName.Text = Convert.ToString(Obj_Customer[i].Name); txtAge.Text = Convert.ToString(Obj_Customer[i].Age); txtEmail.Text = Convert.ToString(Obj_Customer[i].Email); ddl_Wine.SelectedValue = Convert.ToString(Obj_Customer[i].WineID); ddl_RateList.SelectedValue = Convert.ToString(Obj_Customer[i].RateListID); } } }