The three-tier structure of the login program is very suitable for beginners

三层结构登陆程序\LoginDAL\LoginBLL\bin\Debug\LoginBLL.dll
................\........\........\...\.....\LoginBLL.pdb
................\........\........\...\.....\LoginDAL.dll
................\........\........\...\.....\LoginDAL.pdb
................\........\........\...\.....\LoginModel.dll
................\........\........\...\.....\LoginModel.pdb
................\........\........\LoginBLL.csproj
................\........\........\LoginManage.cs
................\........\........\obj\Debug\LoginBLL.csproj.FileListAbsolute.txt
................\........\........\...\.....\LoginBLL.dll
................\........\........\...\.....\LoginBLL.pdb
................\........\........\...\.....\ResolveAssemblyReference.cache
................\........\........\Properties\AssemblyInfo.cs
................\........\.....DAL\bin\Debug\LoginDAL.dll
................\........\........\...\.....\LoginDAL.pdb
................\........\........\...\.....\LoginModel.dll
................\........\........\...\.....\LoginModel.pdb
................\........\........\DbHelper.cs
................\........\........\LoginDAL.csproj
................\........\........\obj\Debug\LoginDAL.csproj.FileListAbsolute.txt
................\........\........\...\.....\LoginDAL.dll
................\........\........\...\.....\LoginDAL.pdb
................\........\........\...\.....\ResolveAssemblyReference.cache
................\........\........\Properties\AssemblyInfo.cs
................\........\........\ScoreDAO.cs
................\........\........\UserDAO.cs
................\........\LoginDAL.sln
................\........\LoginDAL.suo
................\........\.....Model\bin\Debug\LoginModel.dll
................\........\..........\...\.....\LoginModel.pdb
................\........\..........\LoginModel.csproj
................\........\..........\obj\Debug\LoginModel.csproj.FileListAbsolute.txt
................\........\..........\...\.....\LoginModel.dll
................\........\..........\...\.....\LoginModel.pdb
................\........\..........\Properties\AssemblyInfo.cs
................\........\..........\UserInfo.cs
................\........\.....UI\app.config
................\........\.......\bin\Debug\LoginBLL.dll
................\........\.......\...\.....\LoginBLL.pdb
................\........\.......\...\.....\LoginDAL.dll
................\........\.......\...\.....\LoginDAL.pdb
................\........\.......\...\.....\LoginModel.dll
................\........\.......\...\.....\LoginModel.pdb
................\........\.......\...\.....\LoginUI.exe
................\........\.......\...\.....\LoginUI.exe.config
................\........\.......\...\.....\LoginUI.pdb
................\........\.......\...\.....\LoginUI.vshost.exe
................\........\.......\...\.....\LoginUI.vshost.exe.config
................\........\.......\...\.....\LoginUI.vshost.exe.manifest
................\........\.......\Form1.cs
................\........\.......\Form1.Designer.cs
................\........\.......\Form1.resx
................\........\.......\LoginUI.csproj
................\........\.......\obj\Debug\Login.UI.Properties.Resources.resources
................\........\.......\...\.....\LoginUI.csproj.FileListAbsolute.txt
................\........\.......\...\.....\LoginUI.csproj.GenerateResource.Cache
................\........\.......\...\.....\LoginUI.exe
................\........\.......\...\.....\LoginUI.Form1.resources
................\........\.......\...\.....\LoginUI.pdb
................\........\.......\...\.....\ResolveAssemblyReference.cache
................\........\.......\...\.....\TempPE\Properties.Resources.Designer.cs.dll
................\........\.......\Program.cs
................\........\.......\...perties\AssemblyInfo.cs
................\........\.......\..........\Resources.Designer.cs
................\........\.......\..........\Resources.resx
................\........\.......\..........\Settings.Designer.cs
................\........\.......\..........\Settings.settings
................\........\.....BLL\obj\Debug\TempPE
.

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