一种使用RegEx在字符串中查找一组文件名路径的方法

Question

早上好家伙

有没有一种在C#中使用正则表达式的好方法,以便在string变量中查找所有文件名及其路径？

例如,如果您有此字符串:

string s = @"Hello John

these are the files you have to send us today: <file>C:\Development\Projects 2010\Accounting\file20101130.csv</file>, <file>C:\Development\Projects 2010\Accounting\orders20101130.docx</file>

also we would like you to send <file>C:\Development\Projects 2010\Accounting\customersupdated.xls</file>

thank you";

结果将是:

C:\Development\Projects 2010\Accounting\file20101130.csv
C:\Development\Projects 2010\Accounting\orders20101130.docx
C:\Development\Projects 2010\Accounting\customersupdated.xls

编辑: 考虑到@Jim的内容,我编辑了字符串添加标签,以便更容易从字符串中提取所需的文件名!

Answer 1

这是我想出来的:

using System;
using System.Text.RegularExpressions;

public class Test
{

    public static void Main()
    {
        string s = @"Hello John these are the files you have to send us today: 
            C:\projects\orders20101130.docx also we would like you to send 
            C:\some\file.txt, C:\someother.file and d:\some file\with spaces.ext  

            Thank you";

        Extract(s);

    }

    private static readonly Regex rx = new Regex
        (@"[a-z]:\\(?:[^\\:]+\\)*((?:[^:\\]+)\.\w+)", RegexOptions.IgnoreCase);

    static void Extract(string text)
    {
        MatchCollection matches = rx.Matches(text);

        foreach (Match match in matches)
        {
            Console.WriteLine("'{0}'", match.Value);
        }
    }

}

产生:(见ideone)

'C:\projects\orders20101130.docx', file: 'orders20101130.docx'
'C:\some\file.txt', file: 'file.txt'
'C:\someother.file', file: 'someother.file'
'd:\some file\with spaces.ext', file: 'with spaces.ext'

正则表达式不是非常强大(它确实做了一些假设)但它也适用于您的示例.

如果您使用<file>标签,这是该程序的一个版本.更改正则表达式并Extract:

private static readonly Regex rx = new Regex
    (@"<file>(.+?)</file>", RegexOptions.IgnoreCase);

static void Extract(string text)
{
    MatchCollection matches = rx.Matches(text);

    foreach (Match match in matches)
    {
        Console.WriteLine("'{0}'", match.Groups[1]);
    }
}

也可以在ideone上使用.