private void addButton_Click(object sender, EventArgs e)
 {
     BrandForm brandForm = new BrandForm();
     brandForm.setFlag("add");
     if (brandForm.ShowDialog() == DialogResult.OK)
     {
         initListView();
     }
 }
        private void updateButton_Click(object sender, EventArgs e)
        {
            ListViewItem item = this.cutomerListView.FocusedItem;
            if (null != item)
            {
                BrandForm brandForm = new BrandForm();

                Model.Brand brand = new Brand(item.SubItems[1].Text);
                brand.Id  = Int32.Parse(item.SubItems[0].Text);

                brandForm.setBrand(brand);
                brandForm.init();

                brandForm.setFlag("update");

                if (brandForm.ShowDialog() == DialogResult.OK)
                {
                    initListView();
                }
            }
            else
            {
                MessageBox.Show("请先选择品牌!");
            }
        }