在建立与服务器的连接时出错。在连接到 SQL Server 2005 时，在默认的设置下 SQL Server 不允许进行远程连接可能会导致此失败。

(provider: SQL 网络接口, error: 26 - 定位指定的服务器/实例时出错)
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。

异常详细信息: System.Data.SqlClient.SqlException: 在建立与服务器的连接时出错。在连接到 SQL Server 2005 时，在默认的设置下 SQL Server 不允许进行远程连接可能会导致此失败。 (provider: SQL 网络接口, error: 26 - 定位指定的服务器/实例时出错)

源错误:


行 1233: {
行 1234: string sql = "select * from ArticleClass where ParentID=0";
行 1235: return Control.SelectData(sql);
行 1236: }
行 1237: #endregion


源文件: f:\WebSite1\App_Code\Basesystem.cs 行: 1235

堆栈跟踪:


[SqlException (0x80131904): 在建立与服务器的连接时出错。在连接到 SQL Server 2005 时，在默认的设置下 SQL Server 不允许进行远程连接可能会导致此失败。 (provider: SQL 网络接口, error: 26 - 定位指定的服务器/实例时出错)]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +120
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +379
System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject) +463
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +317
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +799
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +415
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +310
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +775
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +89
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +625
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +163
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +884
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +187
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +143
System.Data.SqlClient.SqlConnection.Open() +262
Comm.Comm.OpenData() in G:\netweb\nju\数据库操作底层类\Comm\Comm.cs:53
Comm.Comm.SelectData(String sql) in G:\netweb\nju\数据库操作底层类\Comm\Comm.cs:137
Basesystem.ShowTopMenuClassList() in f:\WebSite1\App_Code\Basesystem.cs:1235
admin_SystemManage_AddAdmin.Page_Load(Object sender, EventArgs e) in f:\WebSite1\admin\SystemManage\AddAdmin.aspx.cs:23
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +37
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +91
System.Web.UI.Control.OnLoad(EventArgs e) +127
System.Web.UI.Control.LoadRecursive() +92
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3370