protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { AddressUtility adr = new AddressUtility(); adr.Delivery_ID = DropDownList1.SelectedValue; adr.selectAddress(); TextBoxAddressType.Text = adr.Address_Type; TextBoxAddressLine1.Text = adr.AddressLine1; TextBoxAddressLine2.Text = adr.AddressLine2; TextBoxZipCode.Text = adr.ZipCode; TextBoxPhone.Text = adr.Phone; addressId = adr.Delivery_ID; }