GroupBy使用linq方法语法(不是查询语法) [英] GroupBy with linq method syntax (not query syntax)

问题描述

如果我使用扩展方法语法，以下查询将如何显示?

How would the following query look if I was using the extension method syntax?

var query = from c in checks
group c by string.Format("{0} - {1}", c.CustomerId, c.CustomerName) 
into customerGroups
select new { Customer = customerGroups.Key, Payments = customerGroups }

推荐答案

它看起来像这样:

var query = checks
    .GroupBy(c => string.Format("{0} - {1}", c.CustomerId, c.CustomerName))
    .Select (g => new { Customer = g.Key, Payments = g });

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