asp.net web api - What is the format of a .NET connection string? -

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i can find dozens of examples of connectionstring entry in web.config, there appears no comprehensive definition of values in string. following mean:

  • data source -- appears server identity, misinterpretation
  • initial catalog
  • attachdbfilename -- seems file name of db file, how relate initial catalog? , |datadirectory| mean when included in name?
  • integrated security -- assume "true" means "windows authentication" used vs "sql server authentication", that's guess.
  • userid/password -- used in few odd examples. not clear when these might/might not needed.
  • server -- see in rare examples -- how different data source?
  • database -- ditto.
  • multipleactiveresultsets -- ??

that's documented right here on msdn.

  • datasource: name or network address of instance of sql server connect.
  • intial catalog: name of database in scope when connecting.
  • attachdbfilename: name of primary database file, including full path name of attachable database. attachdbfilename supported primary data files .mdf extension.
  • integrated security: when false, user id , password specified in connection. when true, current windows account credentials used authentication.
  • user id / pasword: used sql authentication.
  • server: similar purpose datasource, appears support different syntaxs depending on needs.
  • multipleactiveresultsets: when true, application can maintain multiple active result sets (mars). when false, application must process or cancel result sets 1 batch before can execute other batch on connection.

there lot more detail on each of these in documentation.


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