Entity Framework linq to entity 在代码上很慢但在 SQL Server Management Studio 中很快

Question

以下 EF 查询在代码中运行缓慢，但在 SQL Server Management Studio 中运行速度很快。我如何重写此 EF 语句以缩短执行时间？

Context.OfferQuotations
          .Include(x => x.OfferRevision)
          .Include(x => x.OfferRevision.OfferParameters)
          .Include(x => x.OfferRevision.OfferParameters.Select(a => a.CostOfFundings.Select(i => i.OfferCostOfFunding.TermRange)))
          .Where(x => x.Id == quotationId);

Answer 1

我以前遇到过这个问题，所以我就打开了LazyLoading和ProxyCreating。

this.Context.Configuration.LazyLoadingEnabled = true;
this.Context.Configuration.ProxyCreationEnabled = true;

http://www.entityframeworktutorial.net/EntityFramework4.3/lazy-loading-with-dbcontext.aspx

Answer 2

关闭上下文的延迟加载选项。关注本文

https://msdn.microsoft.com/en-us/library/jj574232(v=vs.113).aspx

然后也尝试将您的查询转换为连接，目前它以子查询方式工作。