去掉标签：Server.HtmlEncode编码
Server.HtmlDecode 解码（存入数据库）
public static string StripHTML(string strHtml)
{
string[] aryReg ={
@"<script[^>]*?>.*?</script>",
@"<(/s*)?!?((w+:)?w+)(w+(s*=?s*(([""'])(\[""'tbnr]|[^7])*?7|w+)|.{0})|s)*?(/s*)?>",
@"([
])[s]+",
@"&(quot|#34);",
@"&(amp|#38);",
@"&(lt|#60);",
@"&(gt|#62);",
@"&(nbsp|#160);",
@"&(iexcl|#161);",
@"&(cent|#162);",
@"&(pound|#163);",
@"&(copy|#169);",
@"&#(d+);",
@"-->",
@"<!--.*
"
};
string[] aryRep = {
"",
"",
"",
""",
"&",
"<",
">",
" ",
"xa1",//chr(161),
"xa2",//chr(162),
"xa3",//chr(163),
"xa9",//chr(169),
"",
"
",
""
};
string newReg = aryReg[0];
string strOutput = strHtml;
for (int i = 0; i < aryReg.Length; i++)
{
System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex(aryReg[i], System.Text.RegularExpressions.RegexOptions.IgnoreCase);
strOutput = regex.Replace(strOutput, aryRep[i]);
}
strOutput.Replace("<", "");
strOutput.Replace(">", "");
strOutput.Replace("
", "");
return strOutput;
}