Question

I’m using web project and web forms.

I create Custom Class

 Namespace CustomWebControls
  Public Class NoValidationDDL
    Inherits DropDownList


  End Class
End Namespace

and i try to register this class in assembly web.config page section

<controls>
        <add tagPrefix="customDDL" namespace="CustomWebControls" assembly="ae" />
</controls>

and try to use in ascx

<customDDL:NoValidationDDL ID ="id" runat="server"></customDDL:NoValidationDDL>

How can i do this in web project?

Answer 1

This should work (assuming the assembly name for your project is ae) – make sure that you build the project after creating/modifying your custom control. Unless updated ‘ae.dll’ is present in your bin directory, intellisense etc will not work.

Instead of modify web.config, you may also try register control at page(aspx) or control(ascx) level by adding register directive after page directive:

<%@ Register Assembly="ae" Namespace="CustomWebControls" TagPrefix="customDDL" %>