24

鉴于:

List<Name> names = new List<Name>(); //list full of names

public void RemoveName(string name) {
   List<Name> n = names.Where(x => x.UserName == name);;
   names.Remove(n);
}

执行删除的 Lambda 语法是什么?

如果该功能是否删除,我如何获得“成功”的指示?

4

2 回答 2

46
names.RemoveAll(x => x.UserName == name);

请注意,所有lambda 语法所做的只是提供一个Predicate<T>; lambda 语法与它最终对 lambda所做的事情完全无关。

或单场比赛(见评论):

var found = names.Find(x => x.UserName == name);
if(found != null) names.Remove(found);

或者:

var index = names.FindIndex(x => x.UserName == name);
if(index >= 0) names.RemoveAt(index);
于 2013-01-16T12:23:05.983 回答
3
var n = names.SingleOrDefault(x => x.UserName == name)
if(n != null && n.UserName.length > 0)
{
 names.Remove(n);
}

或者

var n= names.Where(x => x.UserName == name).First();
names.Remove(n)
于 2013-01-16T12:25:56.560 回答