asp.net和C#正則Match的使用

Regex imgreg = new Regex(@"src=(.*)", RegexOptions.IgnoreCase | RegexOptions.Compiled);

string img1 = "";

Match MV2 = imgreg.Match(html);

while (MV2.Success)

{

//hb.Append(MV.Groups[0]);

img1 = MV2.Groups[1].ToString().Trim();

if (img1 != "")

{

Uri addr2 = new Uri(relativeLocation, img1);

html = html.Replace(MV2.Groups[1].Value, addr2.AbsoluteUri); /*復雜替換方法*/

}

MV2 = MV2.NextMatch();

}