sqlexception


连接字符串:server=.;database=PNotice;uid=sa;pwd=happytech捕捉到 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=.
  State=1
  StackTrace:
       在 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
       在 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
       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, TimeoutTimer timeout, SqlConnection owningObject)
       在 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout)
       在 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, 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 DB_HELP.Sqlhelp.setDefaulConn() 位置 E:\happytech\通知通报\PNotice\PNotice\DB_HELP\Sqlhelp.cs:行号 186
  InnerException: 
这里抛出来的：
 try
            {
                conn = new SqlConnection(connnstr);
                conn.Open();
            }
            catch (SqlException e)
            { 
                
            }sql2008  ，安全性-》登录名-》sa:  授予连接到数据库引擎，  启用登陆；
服务器右击属性，安全性，启用  sqlserver和windows身份证验证模式
数据库客户端sa登陆没有问题；
程序运行调试一连接就错误