15.7DataGridView直接修改数据

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;
using System.Data.SqlClient;

namespace _15._7DataGridView直接修改数据
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private SqlConnection getConnection() // 连接数据库
        {
            string constr = "Server=.;user=sa;pwd=zqyo850619;database=csharpzxw";
            SqlConnection mycon = new SqlConnection(constr);
            return mycon;
        }

        private void gdvBind() // 绑定数据
        {
            SqlConnection mycon = getConnection();
            try
            {
                mycon.Open();
                SqlDataAdapter sda = new SqlDataAdapter("select*from mytable001", mycon);
                DataTable table = new DataTable();
                sda.Fill(table);
                this.dataGridView1.AutoGenerateColumns = true;
                this.dataGridView1.DataSource = table;
                this.dataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;
            }
            catch( Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                mycon.Close();

            }
        }

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
          

        }

        private void Form1_Load(object sender, EventArgs e) //载入时执行数据绑定方法
        {
            gdvBind();
        }

        private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
        {
            SqlConnection mycon = getConnection();
            try
            {
                mycon.Open();
                string mystr1=dataGridView1.Columns[e.ColumnIndex].HeaderText+"="+"'"+dataGridView1.CurrentCell.Value.ToString()+"'"; //定义获取数据字符串
                string mystr2="id="+ dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString();

                string updateSql = "update mytable001 set "+mystr1+" where "+mystr2;
                SqlCommand mycmd = new SqlCommand(updateSql, mycon);
                mycmd.ExecuteNonQuery();
                gdvBind();


            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                mycon.Close();

            }
        }
    }
}