zj-Exercise/C#/WindowsFormsDataAdapter2/Form1.cs

using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml.Linq;

namespace WindowsFormsDataAdapter2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        MySqlConnection conn;
        DataSet ds;
        MySqlDataAdapter sda;

        private void Form1_Load(object sender, EventArgs e)
        {
            conn = new MySqlConnection("server=localhost;database=csharp;uid=root;pwd=abc123");
            MySqlCommand cmd = new MySqlCommand("select * from tb_command", conn);
            //创建适配器
            sda = new MySqlDataAdapter();
            sda.SelectCommand = cmd;
            //创建数据集
            ds = new DataSet();
            //将MySqlDataAdapter数据管道中的数据传输到DataSet中
            sda.Fill(ds, "cs");
            //将数据绑定到DataGridView控件上
            dataGridView1.DataSource = ds.Tables[0];
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ////从数据集中取出名称为cs的内存表
            //DataTable dt = ds.Tables["cs"];
            ////调用FillSchema获取表的数据结构
            //sda.FillSchema(dt, SchemaType.Mapped);
            ////使用datatable内存表查找指定编号的数据记录
            //DataRow dr = dt.Rows.Find(txtNo.Text);
            //dr["username"] = txtName.Text.Trim();
            //dr["sex"] = this.txtSex.Text.Trim();
            //dr["age"] = this.txtAge.Text.Trim();
            //dr["bonus"] = this.txtBonus.Text.Trim();
            ////创建cmdbuider对象，关联UpdateCommand属性，实现内部更新命令的关联
            //MySqlCommandBuilder cmdbuider = new MySqlCommandBuilder(sda);
            ////实现更新数据库
            //sda.Update(dt);
        }

        //CellClick：某一个单元格被单击时触发
        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            txtNo.Text = dataGridView1.SelectedCells[0].Value.ToString();
            txtName.Text = dataGridView1.SelectedCells[1].Value.ToString();
            txtSex.Text = dataGridView1.SelectedCells[2].Value.ToString();
            txtAge.Text = dataGridView1.SelectedCells[3].Value.ToString();
            txtBonus.Text = dataGridView1.SelectedCells[4].Value.ToString();
        }
    }
}