Server Error in '/expo' Application.

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Line 32: 
Line 33:     string requestUrl = StringHelper.GetRequestUrl(Request.Url.ToString());
Line 34:     CustomTitleDesKeywords customTitleDesKeywords = CustomTitleDesKeywordsSvr.Instance.GetItemByWebUrl(requestUrl);
Line 35:     if (customTitleDesKeywords != null)
Line 36:     {

[Win32Exception (0x80004005): 乐虎国际游戏_乐虎国际app下载-乐虎国际app下载]

[SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)]
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +353
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +118
   System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +268
   System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +315
   System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +128
   System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +265
   System.Data.SqlClient.SqlConnection.Open() +133
   IBatisNet.DataMapper.SqlMapSession.OpenConnection(String connectionString) +402

[DataMapperException: Unable to open connection to "Microsoft SQL Server, provider V2.0.0.0 in framework .NET V2.0".]
   IBatisNet.DataMapper.SqlMapSession.OpenConnection(String connectionString) +948
   IBatisNet.DataMapper.Commands.DbCommandDecorator.System.Data.IDbCommand.ExecuteReader() +35
   IBatisNet.DataMapper.MappedStatements.MappedStatement.RunQueryForObject(RequestScope request, ISqlMapSession session, Object parameterObject, T resultObject) +97
   IBatisNet.DataMapper.MappedStatements.MappedStatement.ExecuteQueryForObject(ISqlMapSession session, Object parameterObject, T resultObject) +185
   IBatisNet.DataMapper.MappedStatements.MappedStatement.ExecuteQueryForObject(ISqlMapSession session, Object parameterObject) +87
   IBatisNet.DataMapper.SqlMapper.QueryForObject(String statementName, Object parameterObject) +314
   TjCom.Dao.Service.CustomTitleDesKeywordsSvr.GetItemByWebUrl(String webUrl) in D:\糖玖网络\公司项目\tangjiu.comWap\tangjiu.com.dao\TjCom.Dao\TjCom.Dao\Service\CustomTitleDesKeywordsSvr.cs:42
   ASP._Page_Views_ExhibitionEntity_Inland_cshtml.Execute() in d:\wangyongpeng\zhanhuipindao\0.0.4\Views\ExhibitionEntity\Inland.cshtml:34
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +255
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +158
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +108
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +371
   System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +31
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +434
   System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +189
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +53
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +27
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +25
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +67
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +25
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +53
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +41
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +25
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +53
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +431
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +158