使用sqlhelper的简单增删改查

一：所说的简单的三层构架，就是说没有业务逻辑层，将各层没有放到单独的项目中，解决方案如下：

二：form1.cs的详细代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace product
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 插入一条数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            product p= new product();
            
            p.Name="红马車";
           //p.Number=50;
         // p.Price=5165;
            p.C_id = 2;
            productDAL.insertInfor(p);
            

        }
        /// <summary>
        /// 获得所有信息的总条数
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            int result= productDAL.getInforNum();
            MessageBox.Show(result.ToString());
        }
        /// <summary>
        /// 删除指定id的一条数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            productDAL.delectInfor(32);
        }
        /// <summary>
        /// 查询指定id的这条信息
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            product p = new product();
          p=  productDAL.getInfor(18);
          MessageBox.Show(p.C_id+p.Name+p.Number);

        }
    }
}

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