去除HTML格式 截取字符串

//截取部分内容方法
public static string strvalue(string value, int length)
{
string strValue = NoHTML(value);// 去除HTML标记
if (strValue.Length > length)
{
return strValue.Substring(0, length) + "...";
}
else
{
return strValue;
}
}

#region 回车,空格过滤

/**/

/// <summary>

/// 去除HTML标记

/// </summary>

/// <param name="NoHTML">包括HTML的源码 </param>

/// <returns>已经去除后的文字</returns>

public static string NoHTML(string Htmlstring)
{

//删除脚本

Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "",

RegexOptions.IgnoreCase);

//删除HTML

Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"([/r/n])[/s]+", "",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "/"",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "/xa1",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "/xa2",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "/xa3",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "/xa9",

RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&#(/d+);", "",

RegexOptions.IgnoreCase);

Htmlstring.Replace("<", "");

Htmlstring.Replace(">", "");

Htmlstring.Replace("/r/n", "");

Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

return Htmlstring;

}

#endregion