答案\用例1：管理员登录\QQUserManageSystem\data\QQDB.mdf
....\.................\..................\....\QQDB_log.ldf
....\.................\..................\QQUserManageSystem\app.config
....\.................\..................\..................\bin\Debug\QQUserManageSystem.exe
....\.................\..................\..................\...\.....\QQUserManageSystem.exe.config
....\.................\..................\..................\...\.....\QQUserManageSystem.pdb
....\.................\..................\..................\...\.....\QQUserManageSystem.vshost.exe
....\.................\..................\..................\...\.....\QQUserManageSystem.vshost.exe.config
....\.................\..................\..................\...\.....\QQUserManageSystem.vshost.exe.manifest
....\.................\..................\..................\ClassDiagram1.cd
....\.................\..................\..................\DBHandle.cs
....\.................\..................\..................\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
....\.................\..................\..................\...\.....\QQUserManageSystem.csproj.FileListAbsolute.txt
....\.................\..................\..................\...\.....\QQUserManageSystem.exe
....\.................\..................\..................\...\.....\QQUserManageSystem.pdb
....\.................\..................\..................\Program.cs
....\.................\..................\..................\...perties\AssemblyInfo.cs
....\.................\..................\..................\QQUserManageSystem.csproj
....\.................\..................\..................\QQUserManageSystem.csproj.user
....\.................\..................\..................\UserManager.cs
....\.................\..................\QQUserManageSystem.sln
....\....2：菜单显示\QQUserManageSystem\data\QQDB.mdf
....\...............\..................\....\QQDB_log.ldf
....\...............\..................\QQUserManageSystem\app.config
....\...............\..................\..................\bin\Debug\QQUserManageSystem.exe
....\...............\..................\..................\...\.....\QQUserManageSystem.exe.config
....\...............\..................\..................\...\.....\QQUserManageSystem.pdb
....\...............\..................\..................\...\.....\QQUserManageSystem.vshost.exe
....\...............\..................\..................\...\.....\QQUserManageSystem.vshost.exe.config
....\...............\..................\..................\...\.....\QQUserManageSystem.vshost.exe.manifest
....\...............\..................\..................\ClassDiagram1.cd
....\...............\..................\..................\DBHandle.cs
....\...............\..................\..................\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
....\...............\..................\..................\...\.....\QQUserManageSystem.csproj.FileListAbsolute.txt
....\...............\..................\..................\...\.....\QQUserManageSystem.exe
....\...............\..................\..................\...\.....\QQUserManageSystem.pdb
....\...............\..................\..................\Program.cs
....\...............\..................\..................\...perties\AssemblyInfo.cs
....\...............\..................\..................\QQUserManageSystem.csproj
....\...............\..................\..................\QQUserManageSystem.csproj.user
....\...............\..................\..................\UserManager.cs
....\...............\..................\QQUserManageSystem.sln
....\....3：显示用户信息\QQUserManageSystem\data\QQDB.mdf
....\...................\..................\....\QQDB_log.ldf
....\...................\..................\QQUserManageSystem\app.config
....\...................\..................\..................\bin\Debug\QQUserManageSystem.exe
....\...................\..................\..................\...\.....\QQUserManageSystem.exe.config
....\...................\..............