首先按数字排序

我有一个清单

 var x = new List() { "a", "1", "b", "2" };
 var sortedResultByNumeric = x
       .Select(s => new { OriginalString = s, 
                          ExtractNumbers = String.Join("", s.Where(Char.IsDigit)) })
       .OrderBy(o => o.ExtractNumbers).ToList();

输出是

a
b
1
2

但预计是

1
2
a
b

我怎么能这样做？

你看到的和预期的输出是基于OriginalString因为ExtractNumbers是"","","1","2"那么你应该OrderBy OriginalString:

var x = new List() { "a", "1", "b", "2" };
var sortedResultByNumeric = x
           .Select(s => new { OriginalString = s, ExtractNumbers = String.Join("", s.Where(Char.IsDigit)) })
          .OrderBy(o => o.OriginalString).ToList();

输出:

1

2

一个

b