向datagridview添加数据,删除数据

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

namespace DataGridViewDemo
{
    public partial class DataGridViewCustomPaint : Form
    {
        SqlConnection sqlConn;
        SqlDataAdapter sqlDa;
        DataSet sqlDs;

        public DataGridViewCustomPaint()
        {
            InitializeComponent();
        }

        private void DataGridViewCustomPaint_Load(object sender, EventArgs e)
        {

            sqlConn = new SqlConnection("Data Source=.;Initial Catalog=jwinfo;Integrated Security=True;");
            sqlDa = new SqlDataAdapter("SELECT * FROM 学生信息", sqlConn);

            sqlDs = new DataSet();
            sqlDa.Fill(sqlDs, "学生信息");
            dataGridView1.DataSource = sqlDs.Tables["学生信息"];

            //然后用SqlCommandBuilder自动为SqlDataAdapter生成Insert、Update、Delete命令
            SqlCommandBuilder sqlCmdBuilder = new SqlCommandBuilder(sqlDa);
        }

        //更新
        private void button1_Click(object sender, EventArgs e)
        {
            if (sqlDs.HasChanges())
            {
                try
                {
                    sqlDa.Update(sqlDs.Tables["学生信息"]);
                    sqlDs.Tables["学生信息"].AcceptChanges();
                    MessageBox.Show("更新成功！", "操作结果",MessageBoxButtons.OK, MessageBoxIcon.Information );
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "更新失败！", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        //删除
        private void button2_Click(object sender, EventArgs e)
        {
            //删除首先要定位到当前选中的记录
            int delRowIndex = dataGridView1.CurrentRow.Index;
            if (delRowIndex != -1)
                this.dataGridView1.Rows.RemoveAt(delRowIndex);

            //然后调用保存按钮保存删除操作
            button1.PerformClick();
        }
    }
}