void btnSave_Click(object sender, EventArgs e) { Page.Validate(); if (!Page.IsValid) { return; } if (Request["CurrencyId"] == null) { Tariff.AddCurrency(txtName.Text, txtSymbol.Text); } else { Tariff.UpdateCurrency(int.Parse(Request["CurrencyId"]), txtName.Text, txtSymbol.Text); } Response.Redirect("~/Pages/Currencies.aspx"); }