LINQ:将.Single()转换为查询符号 [英] LINQ: convert .Single() to query notation

问题描述

所以我知道查询符号

var word = from s in stringList
           where s.Length == 3
           select s;

等效于点符号

var word = stringList
           .Where(s => s.Length == 3)
           .Select(s => s);

但是如何将点符号转换为查询符号?

But how do you convert this dot notation to a query notation?

var word = wordsList
           .Single(p => p.Id == savedId);

我在Google上找不到太多资源.

I couldn't find much resources on Google.

推荐答案

您不能.许多LINQ函数不能在查询语法中使用.充其量，您可以将两者结合起来并做类似的事情

You can't. A lot of LINQ functions can't be used in the query syntax. At best, you can combine both and do something like

var word = (from p in wordsList
            where p.Id == savedId
            select p).Single()

，但在 collection.Single(condition) 的简单情况下，点符号"对我来说更容易理解.

but in the simple case of collection.Single(condition), the "dot notation" seems more readable to me.

在 MSDN 上，有LINQ使用的关键字列表，您可以从该列表中查看哪些功能已集成到该语言中.

There is a list of keywords used by LINQ on MSDN, you can see which functions are integrated into the language from that list.

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