正则表达式过滤html标签对

    public string DealHtml(string str)

{

//str = Regex.Replace(str, @"(img)[^]*|/(img)", "", RegexOptions.IgnoreCase);

str = Regex.Replace(str, @"(table|tbody|tr|td|th)[^]*|/(table|tbody|tr|td|th)", "", RegexOptions.IgnoreCase);

str = Regex.Replace(str, @"(div|blockquote|fieldset|legend)[^]*|/(div|blockquote|fieldset|legend)", "", RegexOptions.IgnoreCase);

//str = Regex.Replace(str, @"(font|i|u|h[1-9]|s)[^]*|/(font|i|u|h[1-9]|s)", "", RegexOptions.IgnoreCase);

//str = Regex.Replace(str, @"(style|strong)[^]*|/(style|strong)", "", RegexOptions.IgnoreCase);

//str = Regex.Replace(str, @"a[^]*|/a", "", RegexOptions.IgnoreCase);

//str = Regex.Replace(str, @"(meta|iframe|frame|span|tbody|layer)[^]*|/(iframe|frame|meta|span|tbody|layer)", "", RegexOptions.IgnoreCase);

str = Regex.Replace(str, @"br[^]*", "", RegexOptions.IgnoreCase);

str = str.Replace("br", "");

return str;

}