Microsoft 报告 (rdlc) 阻止将数据保存到 SQL Server 数据库

Question

我们在 ASP.NET Web 窗体应用程序（在报表查看器控件上）中有一个复杂的 rdlc 报表，它会在报表生成期间阻止表中的所有行。在创建报表期间，如果我们尝试将数据（使用 EF 5.0）保存在报表从中获取数据的同一个表中，我们会收到以下异常：

 System.Data.SqlClient.SqlException: Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding. ---> 
 System.ComponentModel.Win32Exception: The wait operation timed out

--- End of inner exception stack trace ---

at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at System.Data.Objects.ObjectContext.ExecuteStoreCommand(String commandText, Object[] parameters)
...

我们在报告创建期间尝试使用未提交的读取隔离级别（如 [1] 中所述），但这没有帮助。我们能做什么？

[1] - http://www.c-sharpcorner.com/UploadFile/ff2f08/prevent-dead-lock-in-entity-framework/

Answer 1

您可以尝试将WITH(NOLOCK) 添加到 SSRS 查询中每个 FROM 语句的末尾：

SELECT * 
FROM table1 WITH(NOLOCK)

不过，这相当于使用READ UNCOMMITTED，所以您可能看不出有任何区别。