Three-tier architecture+ abstract factory to achieve the conversion of different databases

三层结构连接不同数据库
......................\LoginBLL
......................\........\BLL.cs
......................\........\LoginBLL.csproj
......................\........\Properties
......................\........\..........\AssemblyInfo.cs
......................\........\bin
......................\........\...\Debug
......................\........\...\.....\LoginBLL.dll
......................\........\...\.....\LoginBLL.pdb
......................\........\...\.....\LoginDAL.dll
......................\........\...\.....\LoginDAL.pdb
......................\........\...\.....\LoginFaily.dll
......................\........\...\.....\LoginFaily.pdb
......................\........\...\.....\LoginIDAL.dll
......................\........\...\.....\LoginIDAL.pdb
......................\........\...\.....\LoginModel.dll
......................\........\...\.....\LoginModel.pdb
......................\........\obj
......................\........\...\Debug
......................\........\...\.....\LoginBLL.csproj.FileListAbsolute.txt
......................\........\...\.....\LoginBLL.dll
......................\........\...\.....\LoginBLL.pdb
......................\........\...\.....\Refactor
......................\........\...\.....\ResolveAssemblyReference.cache
......................\........\...\.....\TempPE
......................\LoginDAL
......................\........\ACC
......................\........\...\DAL.cs
......................\........\LoginDAL.csproj
......................\........\Properties
......................\........\..........\AssemblyInfo.cs
......................\........\SQL
......................\........\...\DAL.cs
......................\........\bin
......................\........\...\Debug
......................\........\...\.....\LoginDAL.dll
......................\........\...\.....\LoginDAL.pdb
......................\........\...\.....\LoginIDAL.dll
......................\........\...\.....\LoginIDAL.pdb
......................\........\...\.....\LoginModel.dll
......................\........\...\.....\LoginModel.pdb
......................\........\obj
......................\........\...\Debug
......................\........\...\.....\LoginDAL.csproj.FileListAbsolute.txt
......................\........\...\.....\LoginDAL.dll
......................\........\...\.....\LoginDAL.pdb
......................\........\...\.....\Refactor
......................\........\...\.....\ResolveAssemblyReference.cache
......................\........\...\.....\TempPE
......................\LoginFaily
......................\..........\Faily.cs
......................\..........\FailyACC.cs
......................\..........\FailySQL.cs
......................\..........\LoginFaily.csproj
......................\..........\Properties
......................\..........\..........\AssemblyInfo.cs
......................\..........\bin
......................\..........\...\Debug
......................\..........\...\.....\LoginDAL.dll
......................\..........\...\.....\LoginDAL.pdb
......................\..........\...\.....\LoginFaily.dll
......................\..........\...\.....\LoginFaily.pdb
......................\..........\...\.....\LoginIDAL.dll
......................\..........\...\.....\LoginIDAL.pdb
......................\..........\...\.....\LoginModel.dll
......................\..........\...\.....\LoginModel.pdb
......................\..........\obj
......................\..........\...\Debug
......................\..........\...\.....\LoginFaily.csproj.FileListAbsolute.txt
......................\..........\...\.....\LoginFaily.dll
......................\..........\...\.....\LoginFaily.pdb
......................\..........\...\.....\Refactor
......................\..........\...\.....\ResolveAssemblyReference.cache
......................\..........\...\.....\TempPE
......................\LoginIDAL
......................\.........\IDAL.cs
......................\.........\LoginIDAL.csproj
......................\.........\Properties
......................\.........\..........\AssemblyInfo.cs
...............

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