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Subject:
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Create Filter that accept certain html tags inText
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Posted By:
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bekim
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Post Date:
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10/7/2004 5:23:57 AM
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Hello
I am trying to create a filter that only accepts 3 html tags like
<Br>
<B></B>
<mailto:someone@website.com>
from textbox.
How do I go about doing this? What properties & methods should I use??
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Reply By:
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bmains
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Reply Date:
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10/7/2004 7:57:19 AM
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I would probably lean towards using regular expressions, the Regex class in the System.Text.RegularExpressions namespace. This class has an IsMatch shared function that checks the text against a reg exp string, and returns a boolean value.
Brian
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Reply By:
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bekim
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Reply Date:
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10/8/2004 3:34:15 AM
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bmains,
Can you give me an brief example of IsMatch shared function that checks the text against a reg exp string of the Regex class in the System.Text.RegularExpressions namespace.
There is no example of this in MSDN.COM.
Thanks
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Reply By:
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bekim
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Reply Date:
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10/8/2004 6:07:45 AM
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Hello
Is there a 3rd party Assembly that already has all html tags as regular expression to use to filter textbox to validate safe html tags that I can purchase??
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Reply By:
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bmains
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Reply Date:
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10/8/2004 5:20:02 PM
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Hey,
I don't think there is a third-party tool. What you may want to consider is creating a custom validator control for yourself. This wouldn't be too hard.
Regular expressions use a peculiar string of characters to match patterns. It is really powerful stuff. The IsMatch is a shared method that takes the input string to check, matches it against the regexp expresssion (2nd param), and returns a boolean value.
Brian
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Reply By:
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bekim
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Reply Date:
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10/8/2004 7:30:28 PM
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I can use custom validator control to see if the textbox.Text string only allows <Br><B> and <mailto: >? I only saw examples of custom validator that only check for one expression like email address. Where do I go to set multiple regular expressions in custom validator control?? (Can I only do this as code behind??)
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