Custom Control in ASP.NET C#

Question

Hello all,

I created a simple custom control that only inherits from the Literal control, and doesn't have any extensions yet, code is empty.

Namespace: CustomControls

Class name: Literal : System.Web.UI.WebControls.Literal

Next thing I do is registering this control in the aspx page as following:

<%@ Register TagPrefix="web" Namespace="CustomControls" %>

(I read in few tutorials that this is one of the ways to register it, besides web.config etc.)

After all, no intellisence for me, and worse- I get a parse error 'unknown server tag: web' when I try to run the page with the control in it.

I used 'create new project' and not new website, in case this info is needed.

What could be my problem?

Thanks in advance.

Answer 1

Do it like this:

<%@ Register TagPrefix="sometag" Namespace="Somewhere" Assembly="Somewhere.Project" %>

Then when you type: sometag you should get a list of all valid controls in the "Somewhere" namespace that is contained in the "Somewhere.Project" assembly.

See how u go.

Answer 2

You can also register your control in web.config if you would like to use it on other pages

<pages>
        <controls>
          <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
          <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
          <add tagPrefix="web" namespace="MyProject.CustomControls" assembly="MyProject" />
        </controls>
      </pages>

For web site this will work

<add tagPrefix ="web" namespace="ASP.App_Code.CustomControls" />