private void btnSave_Click(object sender, EventArgs e) { //判断是添加还是修改!但是无论是添加还是修改,都要进行对象封装 DishTypeInfo dti = new DishTypeInfo(); dti.DTitle = txtTitle.Text; if (txtId.Text == "添加时无编号") { //添加 if (bll.Add(dti)) { MessageBox.Show("添加成功!"); } else { MessageBox.Show("添加失败!请稍后重试"); } } else { //修改 dti.DId = Convert.ToInt32(txtId.Text); if (bll.Exit(dti)) { MessageBox.Show("修改成功!"); } else { MessageBox.Show("修改失败!请稍后重试"); } } LoadList(); btnSave.Text = "添加"; txtId.Text = "添加时无编号"; txtTitle.Text = ""; }