C# 在 List<T> ForEach() 中设置多个属性？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/9114748/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Set multiple properties in a List<T> ForEach()?
提问by maxp
Given a class:
给定一个类：
class foo
{
public string a = "";
public int b = 0;
}
Then a generic list of them:
然后是它们的通用列表：
var list = new List<foo>(new []{new foo(), new foo()});
If I am to assign multipleproperties inside the following List<T>ForEach()method, is there a simpler way to do it that below? Hopefully I'm being a bit thick.
如果我要在以下方法中分配多个属性，下面List<T>ForEach()是否有更简单的方法？希望我有点厚。
// one property - easy peasy
list.ForEach(lambda => lambda.a="hello!");
// multiple properties - hmm
list.ForEach(lambda => new Action(delegate() { lambda.a = "hello!"; lambda.b = 99;}).Invoke());
Edit: Thought ForEach()was a LINQ extension method, when it's actually part of List<T>oops!
编辑：以为ForEach()是 LINQ 扩展方法，但实际上它是List<T>oops的一部分！
采纳答案by Justin Niessner
All you need to do is introduce some brackets so that your anonymous method can support multiple lines:
您需要做的就是引入一些括号，以便您的匿名方法可以支持多行：
list.ForEach(i => { i.a = "hello!"; i.b = 99; });
回答by sll
Anonymous method is your friend
匿名方法是你的朋友
list.ForEach(item =>
{
item.a = "hello!";
item.b = 99;
});
MSDN:
微软：
回答by Richard Friend
list.ForEach(lamba=>lambda.a="hello!");
Becomes
成为
list.ForEach(item=>{
item.a = "hello!";
item.b = 99;
});
Of course you can also assign them when you create the list like :
当然，您也可以在创建列表时分配它们，例如：
var list = new List<foo>(new []{new foo(){a="hello!",b=99}, new foo(){a="hello2",b=88}});
回答by Khodor
list.ForEach(i => i.DoStuff());
public void DoStuff(this foo lambda)
{
lambda.a="hello!";
lambda.b=99;
}
回答by Heinzi
Honestly, there's really no need to use List.ForEach here:
老实说，这里真的没有必要使用 List.ForEach：
foreach (var item in list) { item.a="hello!"; item.b=99; }
