Asp.net中如何过滤html,js,css代码

#region/// 过滤html,js,css代码

/// <summary>

/// 过滤html,js,css代码

/// </summary>

/// <param name="html">参数传入</param>

/// <returns></returns>

public static string CheckStr(string html)

{

System.Text.RegularExpressions.Regex regex1 = new System.Text.RegularExpressions.Regex(@"<script[\s\S]+</script *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

System.Text.RegularExpressions.Regex regex2 = new System.Text.RegularExpressions.Regex(@" href *= *[\s\S]*script *:", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

System.Text.RegularExpressions.Regex regex3 = new System.Text.RegularExpressions.Regex(@" no[\s\S]*=", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

System.Text.RegularExpressions.Regex regex4 = new System.Text.RegularExpressions.Regex(@"<iframe[\s\S]+</iframe *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

System.Text.RegularExpressions.Regex regex5 = new System.Text.RegularExpressions.Regex(@"<frameset[\s\S]+</frameset *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

System.Text.RegularExpressions.Regex regex6 = new System.Text.RegularExpressions.Regex(@"\<img[^\>]+\>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

System.Text.RegularExpressions.Regex regex7 = new System.Text.RegularExpressions.Regex(@"</p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

System.Text.RegularExpressions.Regex regex8 = new System.Text.RegularExpressions.Regex(@"<p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

System.Text.RegularExpressions.Regex regex9 = new System.Text.RegularExpressions.Regex(@"<[^>]*>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

html = regex1.Replace(html, ""); //过滤<script></script>标记

html = regex2.Replace(html, ""); //过滤href=javascript: (<A>) 属性

html = regex3.Replace(html, " _disibledevent="); //过滤其它控件的on...事件

html = regex4.Replace(html, ""); //过滤iframe

html = regex5.Replace(html, ""); //过滤frameset

html = regex6.Replace(html, ""); //过滤frameset

html = regex7.Replace(html, ""); //过滤frameset

html = regex8.Replace(html, ""); //过滤frameset

html = regex9.Replace(html, "");

html = html.Replace(" ", "");

html = html.Replace("</strong>", "");

html = html.Replace("<strong>", "");

return html;

}

#endregion

#region /// 过滤p /p代码

/// <summary>

/// 过滤p /p代码

/// </summary>

/// <param name="html">参数传入</param>

/// <returns></returns>

public static string InputStr(string html)

{

html = html.Replace(@"\<img[^\>]+\>", "");

html = html.Replace(@"<p>", "");

html = html.Replace(@"</p>", "");

return html;

}

#endregion

/// <summary>

/// 截取字符串

/// </summary>

/// <param name="str"></param>

/// <param name="length"></param>

/// <returns></returns>

protected string GetLength(string str, int length)

{

string strR = str;

if (str.Length > length)

{

strR = str.Substring(0, length) + "...";

}

return strR;

}

 
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