以前做项目时，曾经遇到一个问题，就是要一段含html的文本中html的标签清除掉，并将清除后的文本显示在winform的Label上面。当时在网上搜寻了好久，终于找到了点资料，自己好好对照整理了下，现在分享给大家：
/// <summary>
/// 清除文本中Html的标签
/// </summary>
/// <param name="Content"></param>
/// <returns></returns>
private string ClearHtml(string Content)
{
Content = Zxj_ReplaceHtml("&#[^>]*;", "", Content);
Content = Zxj_ReplaceHtml("</?marquee[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?object[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?param[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?embed[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?table[^>]*>", "", Content);
Content = Zxj_ReplaceHtml(" ", "", Content);
Content = Zxj_ReplaceHtml("</?tr[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?th[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?p[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?a[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?img[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?tbody[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?li[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?span[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?div[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?th[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?td[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?script[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("(javascript|jscript|vbscript|vbs):", "", Content);
Content = Zxj_ReplaceHtml("on(mouse|exit|error|click|key)", "", Content);
Content = Zxj_ReplaceHtml("<\\?xml[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("<\\/?[a-z]+:[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?font[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?b[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?u[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?i[^>]*>", "", Content);
Content = Zxj_ReplaceHtml("</?strong[^>]*>", "", Content);
string clearHtml = Content;
return clearHtml;
}
}
/// <summary>
/// 清除文本中的Html标签
/// </summary>
/// <param name="patrn">要替换的标签正则表达式</param>
/// <param name="strRep">替换为的内容</param>
/// <param name="content">要替换的内容</param>
/// <returns></returns>
private string Zxj_ReplaceHtml(string patrn, string strRep, string content)
{
if (string.IsNullOrEmpty(content))
{
content = "";
}
Regex rgEx = new Regex(patrn, RegexOptions.IgnoreCase);
string strTxt = rgEx.Replace(content, strRep);
return strTxt;
}