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.
- C# code
"server=localhost;database=master;integrated security=SSPI"
登陆成功
出现状况：
- C# code
"server=localhost;database=master;uid=sa;pwd=sa"
用户 'sa' 登录失败
- C# code
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.DbConnectionFactory.GetConnection(DbConnection owningConnection) 在 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) 在 System.Data.SqlClient.SqlConnection.Open() 在 ConsoleApplication1.Program.OpenSqlConnection() 位置 C:\Projects\ConsoleApplication1\ConsoleApplication1\Program.cs:行号 21 在 ConsoleApplication1.Program.Main(String[] args) 位置 C:\Projects\ConsoleApplication1\ConsoleApplication1\Program.cs:行号 13 在 System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) 在 System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) 在 Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 在 System.Threading.ThreadHelper.ThreadStart_Context(Object state) 在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 在 System.Threading.ThreadHelper.ThreadStart() InnerException: