:)   多谢您的支持！

楼主客气了，还是感谢楼主的支持！

楼主还没有把问题描述的很清楚，请再仔细或者抓图过来

修改Sql数据库的sa密码或在web.config中修改为sa的密码就是了

“/Asp”应用程序中的服务器错误。<br/>--------------------------------------------------------------------------------<br/><br/>用户 'sa' 登录失败。 <br/>说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 <br/><br/>异常详细信息: System.Data.SqlClient.SqlException: 用户 'sa' 登录失败。<br/><br/>源错误: <br/><br/><br/>行 112:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{<br/>行 113:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;///打开链接<br/>行 114:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;myConnection.Open();<br/>行 115:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;///读取数据<br/>行 116:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dr = myCommand.ExecuteReader(CommandBehavior.CloseConnection);<br/> <br/><br/>源文件: c:\Documents and Settings\桌面\Asp\App_Code\User.cs&nbsp;&nbsp;&nbsp;&nbsp;行: 114 <br/><br/>堆栈跟踪: <br/><br/><br/>[SqlException (0x80131904): 用户 'sa' 登录失败。]<br/>&nbsp;&nbsp; System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +171<br/>&nbsp;&nbsp; System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +199<br/>&nbsp;&nbsp; System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2300<br/>&nbsp;&nbsp; System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +34<br/>&nbsp;&nbsp; System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +606<br/>&nbsp;&nbsp; System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +193<br/>&nbsp;&nbsp; System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +502<br/>&nbsp;&nbsp; System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +28<br/>&nbsp;&nbsp; System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +429<br/>&nbsp;&nbsp; System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +70<br/>&nbsp;&nbsp; System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +510<br/>&nbsp;&nbsp; System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +85<br/>&nbsp;&nbsp; System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +89<br/>&nbsp;&nbsp; System.Data.SqlClient.SqlConnection.Open() +160<br/>&nbsp;&nbsp; User.GetUserLogin(String sUserName, String sPassword) in c:\Documents and Settings\丹英\桌面\Asp\App_Code\User.cs:114<br/><br/>[Exception: 用户 'sa' 登录失败。]<br/>&nbsp;&nbsp; User.GetUserLogin(String sUserName, String sPassword) in c:\Documents and Settings\丹英\桌面\Asp\App_Code\User.cs:121<br/>&nbsp;&nbsp; _Default.LoginBtn_Click(Object sender, EventArgs e) in c:\Documents and Settings\丹英\桌面\Asp\Default.aspx.cs:48<br/>&nbsp;&nbsp; System.Web.UI.WebControls.Button.OnClick(EventArgs e) +75<br/>&nbsp;&nbsp; System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +97<br/>&nbsp;&nbsp; System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7<br/>&nbsp;&nbsp; System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11<br/>&nbsp;&nbsp; System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33<br/>&nbsp;&nbsp; System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4921

请问怎么修改呢?<br/>我是刚刚学这个的~初学者<br/>能否说得详细点呢?<br/>谢谢了!!!

使用Visual Web Developer 2005 Express Edition调试<br/>Asp.net简单留言板源码，进入主页输入用户名/密码/验证码，51aspx/51aspx<br/>出现下面的出错提示<br/>数据库链接成功，provider: 命名管道提供程序, error: 0 - 管道的另一端上无任何进程<br/>A connection was successfully established with the server, but then an error occurred during the login process. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.)

顺着出错向导至帮助信息<br/>InnerException<br/>{&quot;Cannot open database \&quot;LeavewordDB\&quot; requested by the login. The login failed.\r\nLogin failed for user 'sa'.&quot;}