scholastic/Form2_3.cs

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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.Windows.Forms;

namespace scholastic
{
    public partial class Form2_3 : Form
    {
        DataTable mytable;
        SqlConnection mycon;
        string pstr;
        public Form2_3()
        {
            InitializeComponent();
        }
        private void Showdata()
        {
            string constr = "server=.\\sql2005;database=mydata;uid=sa;pwd=sa";
            mycon = new SqlConnection(constr);
            string mysql = "select * from student";
            SqlDataAdapter myada = new SqlDataAdapter(mysql, mycon);
            mytable = new DataTable();
            myada.Fill(mytable);
            dataGridView1.DataSource = mytable.DefaultView;
            mycon.Close();
        }
        private void Form2_3_Load(object sender, EventArgs e)
        {
            Showdata();
        }

        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            pstr = mytable.Rows[e.RowIndex][0].ToString();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("你确定要删除本条记录吗？！", "提示信息", MessageBoxButtons.YesNo, MessageBoxIcon.Information) == DialogResult.Yes)
            {
                mycon.Open();
                string myupdate = "delete from student where 学生ID='" + pstr +"'";
                SqlCommand mycom = new SqlCommand(myupdate, mycon);
                mycom.ExecuteNonQuery();
                mycon.Close();
                Showdata();
                MessageBox.Show("已成功删除该条数据库记录信息", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);

            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();