restaurant.UI/restaurant.UI/DishInfoForm.cs

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using restaurant.BLL;
using restaurant.Model;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace restaurant.UI
{
    public partial class DishInfoForm : Form
    {

        DishInfoBll dishInfoBll = new DishInfoBll();

        public DishInfoForm()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            DishInfo di = new DishInfo();
            di.DTitle = txtTitleSave.Text;
            di.DType = ddlTypeAdd.Text;
            di.DPrice = Convert.ToDecimal(txtPrice.Text);


            if (btnSave.Text.Equals("添加"))
            {
                if (dishInfoBll.Add(di))
                {
                    btnCancel_Click(null, null);
                    LoadList();
                }
                else
                {
                    MessageBox.Show("失败");
                }
            }
            else
            {
                di.DId = Convert.ToInt32(txtId.Text);
                if (dishInfoBll.Update(di))
                {
                    btnCancel_Click(null, null);
                    LoadList();
                }
                else
                {
                    MessageBox.Show("失败");
                }
            }
        }

        private void DishInfoForm_Load(object sender, EventArgs e)