Lambda表达式选择 [英] Lambda expression select

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)

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