一个用C#过滤HTML代码的函数

public string checkStr(string html) 
      { 
          System.Text.RegularExpressions.Regex regex1 = new System.Text.RegularExpressions.Regex(@"<script[\s\S]+</script *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase); 
          System.Text.RegularExpressions.Regex regex2 = new System.Text.RegularExpressions.Regex(@" href *= *[\s\S]*script *:", System.Text.RegularExpressions.RegexOptions.IgnoreCase); 
          System.Text.RegularExpressions.Regex regex3 = new System.Text.RegularExpressions.Regex(@" no[\s\S]*=", System.Text.RegularExpressions.RegexOptions.IgnoreCase); 
          System.Text.RegularExpressions.Regex regex4 = new System.Text.RegularExpressions.Regex(@"<iframe[\s\S]+</iframe *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase); 
          System.Text.RegularExpressions.Regex regex5 = new System.Text.RegularExpressions.Regex(@"<frameset[\s\S]+</frameset *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase); 
          System.Text.RegularExpressions.Regex regex6 = new System.Text.RegularExpressions.Regex(@"\<img[^\>]+\>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);  
          System.Text.RegularExpressions.Regex regex7 = new System.Text.RegularExpressions.Regex(@"</p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase); 
          System.Text.RegularExpressions.Regex regex8 = new System.Text.RegularExpressions.Regex(@"<p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase); 
          System.Text.RegularExpressions.Regex regex9 = new System.Text.RegularExpressions.Regex(@"<[^>]*>", System.Text.RegularExpressions.RegexOptions.IgnoreCase); 
          html = regex1.Replace(html, ""); //过滤<script></script>标记 
          html = regex2.Replace(html, ""); //过滤href=JavaScript: (<A>) 属性 
          html = regex3.Replace(html, " _disibledevent="); //过滤其它控件的on...事件 
          html = regex4.Replace(html, ""); //过滤iframe 
          html = regex5.Replace(html, ""); //过滤frameset 
          html = regex6.Replace(html, ""); //过滤frameset 
          html = regex7.Replace(html, ""); //过滤frameset 
          html = regex8.Replace(html, ""); //过滤frameset 
          html = regex9.Replace(html, ""); 
          html = html.Replace(" ", ""); 
          html = html.Replace("</strong>", ""); 
          html = html.Replace("<strong>", ""); 
          return html; 
} 

转载地址：http://blog.csdn.net/wazhpi/archive/2008/12/28/3628524.aspx