如何在 C# 上对列表进行排序？

Question

I've an compile time error message when I try to use the Sort method from LINQ . What's wrong with my code?

Thanks in advance

public class tt
{
    public string zz;
    public string yy;
}

...   

var tts = new List<tt>();
var sorted = tts.Sort(x => x.yy); // <- Compile Time Error here

Compile Time Error :

Cannot convert lambda expression to type 'IComparer' because it is not a delegate type

Answer 1

You have 2 options here. If you want to sort inplace , ie you want tts itself being sorted, use Sort :

   // Here we should explain how to compare two items (a and b)
   tts.Sort((a, b) => string.Compare(a.yy, b.yy));

If you want to have separated sorted list (while initial tts being preserved intact ), put OrderBy :

   using System.Linq;

   ...

   // Here while given item x we should provide value to sort by (x.yy)
   var sorted = tts.OrderBy(x => x.yy).ToList();