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Filter HTML string summary in ASP. NET, asp.net string

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Author: User
Tags asp net
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Filter HTML string summary in ASP. NET, asp.net string

Write down for backup first!

 

C # code
  1. /// <Summary> remove HTML tags
  2. ///
  3. /// </Summary>
  4. /// <Param name = "Htmlstring"> including the source code of HTML </param>
  5. /// <Returns> removed text </returns>
  6. Public static string GetNoHTMLString (string Htmlstring)
  7. {
  8. // Delete the script
  9. Htmlstring = Regex. Replace (Htmlstring, @ "<script [^>] *?>. *? </Script> "," ", RegexOptions. IgnoreCase );
  10. // Delete HTML
  11. Htmlstring = Regex. Replace (Htmlstring, @ "<(. [^>] *)>", "", RegexOptions. IgnoreCase );
  12. Htmlstring = Regex. Replace (Htmlstring, @ "([\ r \ n]) [\ s] +", "", RegexOptions. IgnoreCase );
  13. Htmlstring = Regex. Replace (Htmlstring, @ "-->", "", RegexOptions. IgnoreCase );
  14. Htmlstring = Regex. Replace (Htmlstring, @ "<! --. * "," ", RegexOptions. IgnoreCase );
  17. Htmlstring = Regex. Replace (Htmlstring, @ "& (quot | #34);", "\" ", RegexOptions. IgnoreCase );
  18. Htmlstring = Regex. Replace (Htmlstring, @ "& (amp | #38);", "&", RegexOptions. IgnoreCase );
  19. Htmlstring = Regex. Replace (Htmlstring, @ "& (lt | #60);", "<", RegexOptions. IgnoreCase );
  20. Htmlstring = Regex. Replace (Htmlstring, @ "& (gt | #62);", ">", RegexOptions. IgnoreCase );
  21. Htmlstring = Regex. Replace (Htmlstring, @ "& (nbsp | #160);", "", RegexOptions. IgnoreCase );
  22. Htmlstring = Regex. Replace (Htmlstring, @ "& (iexcl | #161);", "\ xa1", RegexOptions. IgnoreCase );
  23. Htmlstring = Regex. Replace (Htmlstring, @ "& (cent | #162);", "\ xa2", RegexOptions. IgnoreCase );
  24. Htmlstring = Regex. Replace (Htmlstring, @ "& (pound | #163);", "\ xa3", RegexOptions. IgnoreCase );
  25. Htmlstring = Regex. Replace (Htmlstring, @ "& (copy | #169);", "\ xa9", RegexOptions. IgnoreCase );
  26. Htmlstring = Regex. Replace (Htmlstring, @ "& # (\ d +);", "", RegexOptions. IgnoreCase );
  29. Htmlstring. Replace ("<","");
  30. Htmlstring. Replace ("> ","");
  31. Htmlstring. Replace ("\ r \ n ","");
  32. Htmlstring = HttpContext. Current. Server. HtmlEncode (Htmlstring). Trim ();
  35. Return Htmlstring;
  36. }
  39. /// <Summary> obtain the displayed string to display HTML tags, but filter dangerous HTML tags, such as iframe and script.
  40. ///
  41. /// </Summary>
  42. /// <Param name = "str"> unprocessed string </param>
  43. /// <Returns> </returns>
  44. Public static string GetSafeHTMLString (string str)
  45. {
  46. Str = Regex. Replace (str, @ "<applet [^>] *?>. *? </Applet> "," ", RegexOptions. IgnoreCase );
  47. Str = Regex. Replace (str, @ "<body [^>] *?>. *? </Body> "," ", RegexOptions. IgnoreCase );
  48. Str = Regex. Replace (str, @ "<embed [^>] *?>. *? </Embed> "," ", RegexOptions. IgnoreCase );
  49. Str = Regex. Replace (str, @ "<frame [^>] *?>. *? </Frame> "," ", RegexOptions. IgnoreCase );
  50. Str = Regex. Replace (str, @ "<script [^>] *?>. *? </Script> "," ", RegexOptions. IgnoreCase );
  51. Str = Regex. Replace (str, @ "<frameset [^>] *?>. *? </Frameset> "," ", RegexOptions. IgnoreCase );
  52. Str = Regex. Replace (str, @ "
  53. Str = Regex. Replace (str, @ "<iframe [^>] *?>. *? </Iframe> "," ", RegexOptions. IgnoreCase );
  54. Str = Regex. Replace (str, @ "<style [^>] *?>. *? </Style> "," ", RegexOptions. IgnoreCase );
  55. Str = Regex. Replace (str, @ "<layer [^>] *?>. *? </Layer> "," ", RegexOptions. IgnoreCase );
  56. Str = Regex. Replace (str, @ "<link [^>] *?>. *? </Link> "," ", RegexOptions. IgnoreCase );
  57. Str = Regex. Replace (str, @ "<ilayer [^>] *?>. *? </Ilayer> "," ", RegexOptions. IgnoreCase );
  58. Str = Regex. Replace (str, @ "<meta [^>] *?>. *? </Meta> "," ", RegexOptions. IgnoreCase );
  59. Str = Regex. Replace (str, @ "<object [^>] *?>. *? </Object> "," ", RegexOptions. IgnoreCase );
  60. Return str;
  61. }

 


How does aspnet filter out html code?

Public static string NoHtml (string text)
{
// Delete the script
Text = Regex. Replace (text, @ "<script [^>] *?>. *? </Script> "," ", RegexOptions. IgnoreCase );
// Delete HTML
Text = Regex. Replace (text, @ "<(. [^>] *)>", "", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "([\ r \ n]) [\ s] +", "", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "-->", "", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "<! --. * "," ", RegexOptions. IgnoreCase );

Text = Regex. Replace (text, @ "& (quot | #34);", "\" ", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "& (amp | #38);", "&", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "& (lt | #60);", "<", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "& (gt | #62);", ">", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "& (nbsp | #160);", "", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "& (iexcl | #161);", "\ xa1", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "& (cent | #162);", "\ xa2", RegexOptions. IgnoreCase );
Text = Regex. Replace (text, @ "& (poun ...... the remaining full text>

Asp net filters html code

By default, POST requests containing HTML tags are prohibited. Set ValidateRequest = "false ".

For example:

<% @ Page Language = "C #" AutoEventWireup = "true" CodeBehind = "Default. aspx. cs" Inherits = YourNameSpace. YourClassName "ValidateRequest =" false "%>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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