本文實例講述了C#基于正則表達式抓取a標簽鏈接和innerhtml的方法。分享給大家供大家參考，具體如下：
//讀取網頁htmlstring text = File.ReadAllText(Environment.CurrentDirectory + "//test.txt", Encoding.GetEncoding("gb2312"));string prttern = "<a(//s+(href=/"(?<url>([^/"])*)/"|'([^'])*'|//w+=/"(([^/"])*)/"|'([^'])*'))+>(?<text>(.*?))</a>";var maths = Regex.Matches(text, prttern);//抓取出來寫入的文件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("鏈接地址:{0}, innerhtml：{1}", maths[i].Groups["url"].Value, maths[i].Groups["text"].Value) + "/r/n"); w.Write(bs, 0, bs.Length); Console.WriteLine(); }}Console.ReadKey();圖解正則
朋友需要截取img標簽的src 和data-url 跟上面差不多。。順便附上
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);//抓取出來寫入的文件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("圖片src:{0}, 圖片data-url：{1}", maths[i].Groups["src"].Value, maths[i].Groups["dataurl"].Value) + "/r/n"); w.Write(bs, 0, bs.Length); Console.WriteLine(); }}希望本文所述對大家C#程序設計有所幫助。
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