关于字符串操作的小问题

Question

using System.IO;
System.IO.Path.GetFileName(@"C:\aaa\bbb\bbb\filename.xml");//filename.xmlSystem.IO.Path.GetFileNameWithoutExtension(@"C:\aaa\bbb\bbb\filename.xml");//filename

Answer 1

string s = @"C:\aaa\bbb\bbb\filename.xml";
            string[] sArr = s.Split('\\');
            Console.WriteLine(sArr[sArr.Length-1]);

Answer 2

string a=@"C:\aaa\bbb\bbb\filename.xml";
a.Substring(a.IndexOf("filename"),"filename".Length)

Answer 3

string a=@"C:\aaa\bbb\bbb\filename.xml";
string b=a.Substring(a.LastIndexOf("\\"));

Answer 4

Regex r=new Regex("(?<name>\\w+)(.xml$)");string fileName=r.Match(yourString).Result("${name}");