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.OleDb;


namespace?dl
{
????public?partial?class?Form1?:?Form
????{
????????DataSet?ds;
????????int?maxNum;
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?button1_Click（object?sender?EventArgs?e）
????????{
????????????OleDbConnectionStringBuilder?connectStringBuilder?=?new?OleDbConnectionStringBuilder（）;
????????????connectStringBuilder.DataSource?=?Application.StartupPath.ToString（）?+?“\\dl.mdb“;
????????????connectStringBuilder.Provider?=?“Microsoft.Jet.OLEDB.4.0“;
????????????OleDbConnection?myOleDbConnection?=?new?OleDbConnection（connectStringBuilder.ConnectionString）;
????????????myOleDbConnection.Open（）;
????????????OleDbCommand?cm?=?new?OleDbCommand（“select?*?from?dl?where?name=‘“?+?txtUserName.Text?+?“‘?and?password=‘“?+?txtPassWord.Text?+?“‘“?myOleDbConnection）;

????????????OleDbDataReader?ra=cm.ExecuteReader?（）;
????????????if?（ra.HasRows）
????????????{
????????????????MessageBox.Show（“登入成功！“）;
????????????}
????????????else
????????????{
????????????????MessageBox.Show（“用戶不存在，請檢測用戶名和密碼是否正確！“）;
????????????}

????????????//OleDbDataAdapter?da?=?new?OleDbDataAdapter（cm）;
????????????//ds?=?new?DataSet（）;
????????????//myOleDbConnection.Open（）;
????????????//int?numberOfRows?=?da.Fill（ds?“dl“）;
????????????//myOleDbConnection.Close（）;
????????????//maxNum?=?ds.Tables[“dl“].Rows.Count;
????????????//if?（maxNum?==?1）//如果數(shù)據(jù)中沒有記錄或有多條記錄則抱錯(cuò)?
????????????//{
????????????//????MessageBox.Show（“登入成功！“）;
????????????//}
????????????//else
????????????//{
????????????//????MessageBox.Show（“用戶不存在，請檢測用戶名和密碼是否正確！“）;

????????????//}
????????}
????}
}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????5612??2008-12-04?08:56??dl\dl\Properties\Resources.resx

?????文件????????249??2008-12-04?08:56??dl\dl\Properties\Settings.settings

?????文件???????1162??2008-12-04?08:56??dl\dl\Properties\AssemblyInfo.cs

?????文件???????2858??2008-12-04?08:56??dl\dl\Properties\Resources.Designer.cs

?????文件???????1085??2008-12-04?08:56??dl\dl\Properties\Settings.Designer.cs

?????目錄??????????0??2008-12-04?08:56??dl\dl\Properties

?????文件???????3211??2008-12-04?08:58??dl\dl\dl.csproj

?????文件???????5632??2005-11-11?22:25??dl\dl\bin\Debug\dl.vshost.exe

?????文件??????20480??2008-12-04?10:24??dl\dl\bin\Debug\dl.exe

?????文件??????19968??2008-12-04?10:24??dl\dl\bin\Debug\dl.pdb

?????文件?????147456??2008-12-04?08:54??dl\dl\bin\Debug\dl.mdb

?????目錄??????????0??2008-12-04?08:56??dl\dl\bin\Debug

?????目錄??????????0??2008-12-04?08:56??dl\dl\bin

?????目錄??????????0??2008-12-04?08:56??dl\dl\obj\Debug\TempPE

?????文件????????180??2008-12-04?09:58??dl\dl\obj\Debug\dl.Form1.resources

?????文件????????180??2008-12-04?08:58??dl\dl\obj\Debug\dl.Properties.Resources.resources

?????文件??????20480??2008-12-04?10:24??dl\dl\obj\Debug\dl.exe

?????文件????????842??2008-12-04?09:58??dl\dl\obj\Debug\dl.csproj.GenerateResource.Cache

?????文件??????19968??2008-12-04?10:24??dl\dl\obj\Debug\dl.pdb

?????目錄??????????0??2008-12-04?08:56??dl\dl\obj\Debug

?????文件????????233??2008-12-04?10:24??dl\dl\obj\dl.csproj.FileList.txt

?????目錄??????????0??2008-12-04?08:56??dl\dl\obj

?????文件????????461??2008-12-04?08:56??dl\dl\Program.cs

?????文件???????4057??2008-12-04?09:58??dl\dl\Form1.Designer.cs

?????文件???????5814??2008-12-04?09:58??dl\dl\Form1.resx

?????文件???????1935??2008-12-04?10:24??dl\dl\Form1.cs

?????目錄??????????0??2008-12-04?08:56??dl\dl

?????文件????????895??2008-12-04?08:56??dl\dl.sln

????..A..H.?????11776??2008-12-04?10:24??dl\dl.suo

?????目錄??????????0??2008-12-04?08:56??dl

............此處省略3個(gè)文件信息