C#基于正则表达式抓取a标签链接和innerhtml的方法

string text =File.ReadAllText(Environment.CurrentDirectory + "//test.txt", Encoding.GetEncoding("gb2312"));

string prttern = "<img(\\s*(src=\"(?<src>[^\"]*?)\"|data-url=\"(?<dataurl>[^\"]*?)\"|[-\\w]+=\"[^\"]*?\"))*\\s*/>";

var maths = Regex.Matches(text, prttern);

//抓取出来写入的文件

using (FileStream w = new FileStream(Environment.CurrentDirectory + "//wirter.txt", FileMode.Create))

{

    for (int i = 0; i < maths.Count; i++)

    {

      byte[] bs = Encoding.UTF8.GetBytes(string.Format("图片src:{0},  图片data-url：{1}", maths[i].Groups["src"].Value,

        maths[i].Groups["dataurl"].Value) + "\r\n");

      w.Write(bs, 0, bs.Length);

      Console.WriteLine();

    }

}