Lambda表达式选择

本文介绍了Lambda表达式选择的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

你好！ 我有这个lambda表达式 .Select(res => new {res.YEAR，res.Week，res.Number}); 如何将res.YEAR，res.Week合并为lambda表达式中的一个字符串? 我也想在Year上做一个子字符串，这可能吗?

Hello! I have this lambda expression .Select(res => new {res.YEAR, res.Week, res.Number}); How can i combine res.YEAR, res.Week into one string in a lambda expression? I also want to do a substring on the Year, is this possible? Thanks!

推荐答案

嗨！ 是的，那是所有可能的.在示例中使用匿名类: Hi! Yes, that is all possible. Using an anonymous class as in your example: .Select(res => new { Combination = res.Week + res.Year, Substring = res.Year.Substring(0, 2) });

或者，如果您想要一个简单的字符串列表:

Or if you want a simple list of strings:

.Select(res => res.Year.Substring(0, 2))

或

or

.Select(res => res.Week + ", " + res.Year)