Paragraph on the database connection library written in C#, use, simply: " the string M_str_sqlcon = the" Data Source = pc1 \ \ SQLEXPRESS the uid = sa pwd = root database = db_Tools " in the field replaced with your own database fields, and then compiled into dll file to use. The benefit of this method is to write a command on the database connection is very convenient for program maintenance.

CL_db
.....\CL_db
.....\CL_db.sln
.....\CL_db.suo
.....\.....\bin
.....\.....\...\Debug
.....\.....\...\.....\CL_db.dll
.....\.....\...\.....\CL_db.pdb
.....\.....\Class1.cs
.....\.....\CL_db.csproj
.....\.....\obj
.....\.....\...\CL_db.csproj.FileList.txt
.....\.....\...\CL_db.csproj.FileListAbsolute.txt
.....\.....\...\Debug
.....\.....\...\.....\CL_db.csproj.FileListAbsolute.txt
.....\.....\...\.....\CL_db.dll
.....\.....\...\.....\CL_db.pdb
.....\.....\...\.....\TempPE
.....\.....\Properties
.....\.....\..........\AssemblyInfo.cs

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