scholastic/Form7_2.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 Form7_2 : Form
    {
        DataTable mytable;
        SqlConnection mycon;
        string pstr,ps;
        public Form7_2()
        {
            InitializeComponent();
        }
        private void Showdata()
        {
            string constr = "server=.\\sql2005;database=mydata;uid=sa;pwd=sa";
            mycon = new SqlConnection(constr);
            string mysql = "select * from grade";
            SqlDataAdapter myada = new SqlDataAdapter(mysql, mycon);
            mytable = new DataTable();
            myada.Fill(mytable);
            dataGridView1.DataSource = mytable.DefaultView;
            mycon.Close();
        }
        private void Form7_2_Load(object sender, EventArgs e)
        {
            Showdata();
            textBox2.Text = mytable.Rows[0][0].ToString();
            textBox3.Text = mytable.Rows[0][1].ToString();
            textBox4.Text = mytable.Rows[0][2].ToString();
            textBox5.Text = mytable.Rows[0][3].ToString();
            textBox6.Text = mytable.Rows[0][4].ToString();
        }

        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            pstr = mytable.Rows[e.RowIndex][0].ToString();
            ps = mytable.Rows[e.RowIndex][3].ToString();
            textBox2.Text = mytable.Rows[e.RowIndex][0].ToString();
            textBox3.Text = mytable.Rows[e.RowIndex][1].ToString();
            textBox4.Text = mytable.Rows[e.RowIndex][2].ToString();
            textBox5.Text = mytable.Rows[e.RowIndex][3].ToString();
            textBox6.Text = mytable.Rows[e.RowIndex][4].ToString();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if ( textBox2.Text == "" || textBox3.Text == "" || textBox4.Text == "" || textBox5.Text == "" || textBox6.Text == "")
            {
                MessageBox.Show("修改信息记录信息不完整,重新输入！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            else