C#删除所有的Html标记,或者删除特定标记
C#删除所有的Html标记
删除字符串中的特定标记
删除字符串中的一组标记
方法示例：
/// <summary>
/// 删除所有的html标记
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string DelHtmlString(string str)
{
string[] Regexs =
{
@"<script[^>]*?>.*?</script>",
@"<(\/\s*)?!?((\w :)?\w )(\w (\s*=?\s*(([""'])(\\[""'tbnr]|[^\7])*?\7|\w )|.{0})|\s)*?(\/\s*)?>",
@"([\r\n])[\s] ",
@"&(quot|#34);",
@"&(amp|#38);",
@"&(lt|#60);",
@"&(gt|#62);",
@"&(nbsp|#160);",
@"&(iexcl|#161);",
@"&(cent|#162);",
@"&(pound|#163);",
@"&(copy|#169);",
@"&#(\d );",
@"-->",
@"<!--.*\n"
};
string[] Replaces =
{
"",
"",
"",
"\"",
"&",
"<",
">",
" ",
"\xa1", //chr(161),
"\xa2", //chr(162),
"\xa3", //chr(163),
"\xa9", //chr(169),
"",
"\r\n",
""
};
string s = str;
for (int i = 0; i < Regexs.Length; i )
{
s = new Regex(Regexs[i], RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(s, Replaces[i]);
}
s.Replace("<", "");
s.Replace(">", "");
s.Replace("\r\n", "");
return s;
}
/// <summary>
/// 删除字符串中的特定标记
/// </summary>
/// <param name="str"></param>
/// <param name="tag"></param>
/// <param name="isContent">是否清除内容 </param>
/// <returns></returns>
public static string DelTag(string str, string tag, bool isContent)
{
if (tag == null || tag == " ")
{
return str;
}
if (isContent) //要求清除内容
{
return Regex.Replace(str, string.Format("<({0})[^>]*>([\\s\\S]*?)<\\/\\1>", tag), "", RegexOptions.IgnoreCase);
}
return Regex.Replace(str, string.Format(@"(<{0}[^>]*(>)?)|(</{0}[^>] *>)|", tag), "", RegexOptions.IgnoreCase);
}
/// <summary>
/// 删除字符串中的一组标记
/// </summary>
/// <param name="str"></param>
/// <param name="tagA"></param>
/// <param name="isContent">是否清除内容 </param>
/// <returns></returns>
public static string DelTagArray(string str, string tagA, bool isContent)
{
string[] tagAa = tagA.Split(',');
foreach (string sr1 in tagAa) //遍历所有标记，删除
{
str = DelTag(str, sr1, isContent);
}
return str;
}