怎么用正则表达式获取文章内容中的<img标签和 src的路径

正则:

查找Img标签开头的图片路径
[iI][mM][gG][\s]*[sS][rR][cC][\s]*=[\s'"]*(?<ref_value>.*?(\.gif|\.jpg|\.png))

查找Function中的图片路径
[a-zA-Z_][a-zA-Z0-9_]+[\s]*\([^)]+?('|")(?<ref_value>[a-zA-Z0-9/\\-_\.]+?(\.gif|\.jpg|\.png))('|")[^)]*\)

查找background标签的图片路径
background="(?<ref_value>[^"]+)

查找URL的图片路径
:[\s]*url[\s]*\([\s"']*(?<ref_value>["']*[^)]+)

通用的:
("|')(?<ref_value>[^"']+?(\.gif|\.png|\.jpg))("|')


url\(['\"]?\s*(?<ref_value>[^>]+?)['\"]?\s*\)
Cimg[\d+]*[\s]*\([\s"']*(?<ref_value>[^"')]+)

 

 

private IList<string> MatchImgPath(string content, string regexPattern)
  {
  IList<string> _ret = new List<string>();
  Regex reg = new Regex(regexPattern);
  string _imgPath = "";
  MatchCollection mc = reg.Matches(content);
  if (mc != null && mc.Count > 0)
  {
  foreach (Match match in mc)
  {
  if (match.Success == false || match.Value == null || match.Value == "")
  continue;

  foreach (string name in reg.GetGroupNames())
  {
  if (name == null || name == "" || name == "0")
  continue;

  if (name == "ref_value"
  && match.Groups[name].Value != null
  && match.Groups[name].Value != "")
  {
  _imgPath = match.Groups[name].Value;
  if(!_ret.Contains(_imgPath.ToLower()))
  _ret.Add(_imgPath.ToLower());
  }
  }
  }
  }
  return _ret;
  }