用户 'sa' 登录失败
情况大致是这样
1.SQL SERVER 2008
2.sa配置正常，SQL Server Management Studio 用windows验证登陆和SQL验证（sa）登陆都正常

3.

"server=localhost;database=master;integrated security=SSPI"

登陆成功
出现状况：

"server=localhost;database=master;uid=sa;pwd=sa"

用户 'sa' 登录失败

未处理 System.Data.SqlClient.SqlException

  Message="用户 'sa' 登录失败。"

  Source=".Net SqlClient Data Provider"

  ErrorCode=-2146232060

  Class=14

  LineNumber=65536

  Number=18456

  Procedure=""

  Server="localhost"

  State=1

  StackTrace:

       在 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)

       在 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)

       在 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)

       在 System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK)

       在 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject)

       在 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart)

       在 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)

       在 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)

       在 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)

       在 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)

       在 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)

       在 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)

       在 System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)

       在 System.Data.ProviderBase.DbConnection