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

namespace?MyWork
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}
????????private?void?button2_Click（object?sender?EventArgs?e）
????????{
????????????textBox1.Text?=?““;
????????????textBox2.Text?=?““;
????????}
????????string?User?Pwd;
????????bool?flagshow?=?false;
?????????private?void?button1_Click（object?sender?EventArgs?e）?
????????{???????????
????????????string?str=?“server=.;database=School;uid=sa;pwd=123“;
????????????SqlConnection?cnn?=?new?SqlConnection（str）;
????????????cnn.Open（）;
????????????SqlCommand?com?=?new?SqlCommand（“select?用戶名密碼?from?用戶“?cnn）;
????????????SqlDataReader?reader?=?com.ExecuteReader（）;
????????????while?（reader.Read（））//從數據庫讀取用戶信息
????????????{
????????????????User?=?reader[“用戶名“].ToString（）;
????????????????Pwd?=?reader[“密碼“].ToString（）;
????????????????if?（User.Trim?（）?==?textBox1.Text?&?Pwd.Trim?（）?==?textBox2.Text）
????????????????{
????????????????????flagshow?=?true;
????????????????}
????????????}
????????????reader.Close（）;
????????????cnn.Close（）;
?
????????????if?（flagshow?==?true）
????????????{
????????????????Form2?f2?=?new?Form2（）;
????????????????this.Hide（）;
????????????????f2.Show（）;
????????????}
????????????else
????????????{
????????????????MessageBox.Show（“用戶不存在或輸入錯誤！“）;
????????????????return;
????????????}
????????}

?????????private?void?button3_Click（object?sender?EventArgs?e）
?????????{
?????????????Form6?f?=?new?Form6（）;
?????????????????f.Show（）;
?????????}
?????}
}
???

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????486912??2013-06-06?20:07??MyWork\MyWork\bin\Debug\MyWork.exe

?????文件??????75264??2013-06-06?20:07??MyWork\MyWork\bin\Debug\MyWork.pdb

?????文件??????11592??2013-06-06?20:32??MyWork\MyWork\bin\Debug\MyWork.vshost.exe

?????文件????????490??2009-06-11?05:14??MyWork\MyWork\bin\Debug\MyWork.vshost.exe.manifest

?????文件???????1885??2012-06-19?11:18??MyWork\MyWork\Form1.cs

?????文件???????7724??2012-06-19?11:18??MyWork\MyWork\Form1.Designer.cs

?????文件???????5814??2012-06-19?11:18??MyWork\MyWork\Form1.resx

?????文件???????1361??2012-06-19?10:49??MyWork\MyWork\Form2.cs

?????文件???????7132??2012-06-19?10:49??MyWork\MyWork\Form2.Designer.cs

?????文件???????6012??2012-06-19?10:49??MyWork\MyWork\Form2.resx

?????文件???????3241??2013-06-05?17:33??MyWork\MyWork\Form3.cs

?????文件???????9995??2013-06-05?17:33??MyWork\MyWork\Form3.Designer.cs

?????文件???????5814??2013-06-05?17:33??MyWork\MyWork\Form3.resx

?????文件???????3092??2013-06-05?17:37??MyWork\MyWork\Form4.cs

?????文件???????9027??2013-06-05?17:37??MyWork\MyWork\Form4.Designer.cs

?????文件???????5814??2013-06-05?17:37??MyWork\MyWork\Form4.resx

?????文件???????1744??2013-06-05?23:33??MyWork\MyWork\Form5.cs

?????文件???????6414??2013-06-05?23:33??MyWork\MyWork\Form5.Designer.cs

?????文件???????5814??2013-06-05?23:33??MyWork\MyWork\Form5.resx

?????文件???????1656??2012-06-19?10:43??MyWork\MyWork\Form6.cs

?????文件???????5667??2012-06-19?10:43??MyWork\MyWork\Form6.Designer.cs

?????文件???????5814??2012-06-19?10:43??MyWork\MyWork\Form6.resx

?????文件????????356??2013-06-06?20:33??MyWork\MyWork\Form7.cs

?????文件???????2369??2013-06-06?20:33??MyWork\MyWork\Form7.Designer.cs

?????文件???????5814??2013-06-06?20:33??MyWork\MyWork\Form7.resx

?????文件??????29737??2012-06-17?14:45??MyWork\MyWork\img\1.gif

?????文件?????245353??2012-06-17?17:29??MyWork\MyWork\img\2.gif

?????文件?????182566??2013-06-05?18:19??MyWork\MyWork\img\3.jpg

????..A.SH.??????4608??2012-06-17?14:48??MyWork\MyWork\img\Thumbs.db

?????文件???????5919??2012-06-19?10:30??MyWork\MyWork\MyWork.csproj

............此處省略40個文件信息