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Editorial Team
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Asked: 2026-06-13T13:52:32+00:00

I’m building a footnote editor for a specific need and I need a drop

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I’m building a footnote editor for a specific need and I need a drop list that shows special characters such as a dagger (&#134). Not sure if it matters, but the drop list is in a ajax modal popup form. Whenever I try to display the popup form, I get the error “A potentially dangerous Request.Form value was detected from the client (ctl00$MainContent$ucFootNoteList$DropDownList1=”*, &#134″).“

I tried adding
<httpRuntime requestValidationMode=”2.0″ />
to the Web.config file.

How do I show a special character in this scenario without this error coming up?

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1 Answer

  1. Editorial Team

    You could set the validateRequest property on the Page header of the corresponding WebForm to disable request validation and allow posting HTML characters:

    <%@ Page validateRequest="false" %>

    This could also be done globally for all WebForms in the web.config:

    <pages validateRequest="false" />

    Here’s an article on MSDN where you could read more about request validation in ASP.NET.

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