form1.cs

c# + sql2000 学生管理系统

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 StudentManage.UILevel
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.Run(new Form1());
        }
        private void button1_Click(object sender, EventArgs e)
        {

            SqlConnection my = new SqlConnection();
            my.ConnectionString = "server=.;uid=sa;pwd=;database=raiks";
            my.Open();
            string se = "select * from raiks where uid='" + this.textBox1.Text + "'and pwd='" + this.textBox2.Text + "'";
            SqlCommand cmd = new SqlCommand(se, my);
            SqlDataReader reader = cmd.ExecuteReader();
            reader.Read();

            try
            {
                if (textBox1.Text.Equals(reader.GetString(0)))
                {


                    MainForm f1 = new MainForm();
                    this.Hide();
                    f1.ShowDialog();
                    this.Close();

                }


            }

            catch
            {
                if (textBox1.Text.Trim() == "" || textBox2.Text.Trim() == "")
                {
                    MessageBox.Show("请输入用户名和密码", "错误提示");
                }
                else
                    MessageBox.Show("用户密码有误", "错误提示");//异常提示 
            }
            finally
            {
                my.Close();
                cmd.Dispose();
                my.Dispose();
            }
        
        
        }

        private void button2_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            textBox2.Text = "";
        }

        private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
        {

        }

        private void 文件ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        

        




        }
    }