//submit button to insert(register) new customer information protected void uxSubmit_Click(object sender, EventArgs e) { string un = Convert.ToString(uxUsername.Text); if (CustomerDB.CheckUserName(un)) { var cust = new Customer { UserName = uxUsername.Text, Password = uxPassword.Text, CustFirstName = uxFirstName.Text, CustLastName = uxLastName.Text, CustAddress = uxAddress.Text, CustCity = uxCity.Text, CustProv = DropDownList1.Text, CustPostal = uxPostal.Text, CustCountry = uxCountry.Text, CustHomePhone = uxHomePhone.Text, CustBusPhone = uxBusPhone.Text, CustEmail = uxEmail.Text }; int CustID = CustomerDB.AddCustomer(cust); // create a customer session Session["Customer"] = cust; Response.Redirect("~/CustomerOrders.aspx"); } else { Session["Customer"] = null; //Response.Write("UserName is already exist,please try another one."); Response.Write("<script>alert('UserName is already exist,please try another one.')</script>"); } }//end of sumit button