是否有LINQ函数用于获取字符串列表中最长的字符串？

Question

是否有一个LINQ功能,或者必须自己编码,如下所示:

static string GetLongestStringInList()
{
    string longest = list[0];

    foreach (string s in list)
    {
        if (s.Length > longest.Length)
        {
            longest = s;
        }
    }

    return longest;
}

Answer 1

这只需要一次循环迭代:

list.Aggregate("", (max, cur) => max.Length > cur.Length ? max : cur);

Answer 2

你可以用这个: list.OrderByDescending(s => s.Length).First();

Answer 3

var list = new List<string>(); // or string[] or any

list.Add("a");
list.Add("ccc");
list.Add("bb");
list.Add("eeeee");
list.Add("dddd");

// max-length
var length = list.Max(s => s.Length);

// biggest one
var biggest = list.FirstOrDefault(s => s.Length == length);

// if there is more that one by equal length
var biggestList = list.Where(s => s.Length == length);

// by ordering list
var biggest = list.OrderByDescending(s => s.Length).FirstOrDefault();

// biggest-list by LINQ
var bigList2 = from s in list where s.Length == list.Max(a => a.Length) select s;

// biggest by LINQ
var biggest2 = bigList2.FirstOrDefault();