Linq订单通过自定义订单 [英] Linq OrderBy custom order

问题描述

说我有以下字符数组:

char[] c = new char[] { 'G', 'R', 'D', 'D', 'G', 'R', 'R', 'C', 'D', 'G', 'R', 'R', 'C', 'G', 'R', 'D', 'D', 'G', 'R', 'R', 'C', 'D', 'G', 'R', 'R', 'C' };


c.OrderBy(y => y).ForEach(x => Console.WriteLine(x));
//CCCCDDDDDDGGGGGGRRRRRRRRRR

如何使用linq生成以下命令?

How do I use linq to produce the following order?

//DDDDDDGGGGGGRRRRRRRRRRCCCC

推荐答案

也许您想做这样的事情:

May be you want to do something like this :

char [] customOrder = { 'D', 'G', 'R', 'C'}; 
char [] c = new char[] { 'G', 'R', 'D', 'D', 'G', 'R', 
                         'R', 'C', 'D', 'G', 'R', 'R', 
                         'C', 'G', 'R', 'D', 'D', 'G', 
                         'R', 'R', 'C', 'D', 'G', 'R', 'R', 'C' };

foreach (char item in c.OrderBy(ch => Array.IndexOf(customOrder, ch))) {
    Console.Write(item); 
}

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