问：后台登陆后出现
“/”应用程序中的服务器错误。找不到网络路径。说明: 执行当前 Web 请求期间，出现未经处理的异常。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.ComponentModel.Win32Exception: 找不到网络路径。
源错误:
执行当前 Web 请求期间生成了未经处理的异常。可以使用下面的异常堆栈跟踪信息确定有关异常原因和发生位置的信息。
堆栈跟踪:
[Win32Exception (0x: 找不到网络路径。]
[SqlException (0x: 在与 SQL Server 建立连接时出现与网络相关的或特定于实例的错误。未找到或无法访问服务器。请验证实例名称是否正确并且 SQL Server 已配置为允许远程连接。 (provider: Named Pipes Provider, error: 40 – 无法打开到 SQL Server 的连接)]
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) 347
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) 78
System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) 191
System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) 154
System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) 21
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) 90
System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) 443
System.Data.SqlClient.SqlConnection.Open() 96
System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) 120
System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior) 160
System.Data.Common.DbDataAdapter.Fill(DataTable dataTable) 108
WangMei.DAL.SqlHelper.ExecuteDataTable(String sql, CommandType type, SqlParameter[] ps) in e:\\英国INSPEC国际有限公司\\WangMei\\WangMei.DAL\\SqlHelper.cs:55
WangMei.DAL.ManagerInfoDAL.GetEntityByUserName(String userName) in e:\\英国INSPEC国际有限公司\\WangMei\\WangMei.DAL\\ManagerInfoDAL.cs:162
WangMei.BLL.ManagerInfoBLL.GetEntityByUserName(String userName) in e:\\英国INSPEC国际有限公司\\WangMei\\WangMei.BLL\\ManagerInfoBll.cs:31
WangMei.Web..index.Page_Load(Object sender, EventArgs e) in e:\\英国INSPEC国际有限公司\\WangMei\\WangMei.Web\\\\index.aspx.cs:29
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) 51
System.Web.UI.Control.OnLoad(EventArgs e) 95
System.Web.UI.Control.LoadRecursive() 59
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) 678
版本信息: Microsoft .NET Framework 版本:4.0.30319; ASP.NET 版本:4.7.3930.0,网站后台无法登陆，麻烦看下
答：您好，
非常抱歉，目前机房网络故障，机房正在紧急处理中，请您耐心等待晚点再试下，非常感谢您长期对我司的支持。由此给您带来的不便之处，敬请原谅!谢谢！
