>In a data entry form, the client has entered some encoded HTML characters. Those are not dangerous because they are for the French characters. But, the interface rejects them as soon as posted. The message is:
>
>A potentially dangerous Request.Form value was detected from the client...
>
>When looking at the calling chain, there is no way to take action on that. How can this be accomplished?

Michel,

There is a setting called ValidateRequest that you can set to turn this feature on and off. The setting is in Machine.config, web.config, and can be set in the @ Page directive.

There is not an event hook for this, but it throws an HttpRequestValidationException that you can intercept in a Try/Catch block. I'm not too sure where to put the Try/Catch. You can also look for the error in the Global.asax Application_Error event.