zj-Exercise/C#/WindowsFormsCommand2/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;

namespace WindowsFormsCommand2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        MySqlConnection conn;

        private void button1_Click(object sender, EventArgs e)
        {
            conn = new MySqlConnection("server=localhost;database=csharp;uid=root;pwd=abc123");
            conn.Open();
            MySqlCommand cmd = new MySqlCommand();
            cmd.Connection = conn;
            //设置要执行的命令文本（即SQL语句）
            cmd.CommandText = "update tb_command set bonus=50 where sex='女'";
            //设置命令类型
            cmd.CommandType = CommandType.Text;
            //调用ExecuteNonQuery方法执行SQL语句
            int i = Convert.ToInt32(cmd.ExecuteNonQuery());
            label2.Text = "共有" + i.ToString() + "名女员工获得奖金";
        }
    }
}