在DownloadString中查找并替换href [英] find and replace href in DownloadString

问题描述

在使用webclient获取下载字符串后，我希望将所有的href部分替换为新的plz帮助

after use webclient to get downloadstring， i wish to replace all the href part with something new, plz help

推荐答案

String.Replace [

String.Replace[^] will help you replace string with other text.

使用 Regex.Replace [ ^ ]
试试这个:

Use Regex.Replace[^]
Try this:

using System;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        // original string
        string input = "<a href='http://oldurl.com'>somewhere</a>";
        // use Regex.Replace to replace the pattern in the input.
        string pattern = @"(?<=href=[']).+(?=')";
        string output = Regex.Replace(input, pattern,"http://newurl.com");
        // Write the output.
        Console.WriteLine(input);
        Console.WriteLine(output);
    }
}

它将输出:

It will output:

<a href='http://oldurl.com'>somewhere</a>
<a href='http://newurl.com'>somewhere</a>

进一步了解 Regex [ ^ ]

Learn more about Regex[^]

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