/// <summary>
        /// 添加原材料
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "" || textBox2.Text == "" || textBox3.Text == "")
            {
                MessageBox.Show("请填写完整的新增信息", "", MessageBoxButtons.OK, MessageBoxIcon.Warning); return;
            }
            Material model = new Material();

            model.name  = textBox1.Text;
            model.Price = textBox2.Text;
            model.sum   = Convert.ToInt32(textBox3.Text);
            if (MaterialHelper.Add(model))
            {
                ShowDataGird(); MessageBox.Show("添加成功", "", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }