请教正则的写法.

[fancystyle]

如何实现如下替换:

如:
a1a ---> a001a
1aa ---> 001aa
b12 ---> b012

意图是想用用C#实现 StrCmpLogical 方法,实现Windows Explore 下的按文件名排序,
也就是:
如果有三个文件如: 1.txt,2.txt,10.txt ,默认字符串排序会排成1.txt,10.txt,2.txt

[q107770540]

你到底是要替换还是排序呢？

[q107770540]

void Main()
{
	string[] ay={"a1a","1aa","b12"};
	foreach(string s in ay)
	{
	  Console.WriteLine(Regex.Replace(s,"\\d+",m=>m.Value.PadLeft(3,'0')));
	}
	/*
	a001a
	001aa
	b012
	*/
}

[EnForGrass]

请说清楚你的问题

[cnfixit]

lsv5

[q107770540]

string[] ay={"1.txt","2.txt","10.txt"};
ay=ay.OrderBy(a=>System.IO.Path.GetFileNameWithoutExtension(a)).ToArray();

[EnForGrass]

PadLeft补充0.1楼已经给了答案

  string[] arr = { @"C:\1.txt", @"C:\2.txt", @"C:\10.txt" };
  arr = arr.OrderBy(p => System.IO.Path.GetFileName(p)).ToArray();
  arr.ToList().ForEach(x => Console.WriteLine(x));

[fancystyle]

结帖.
Regex.Replace(s,"\\d+",m=>m.Value.PadLeft(3,'0'))

[cjh200102]

楼上good.