I cannot drag web custom controls from toolbox to web form

I have created some web custom controls (both composite controls or derived/inherited controls).  I successfully added them to the toolbox.

However, when I try to drag them onto the form, the cursor changes into a black circle with a diagonal line, and cannot drag them.  I also tried double-clicking them from the toolbox but it still won't work.

I sent the Control Library (DLL) to a friend, and he managed to use it properly.  I am assuming this is a problem with my Visual Studio.

Has anyone encountered such a problem?  Any suggestions or solutions?



5/4/2006 8:51:19 PM
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Is it a Web form or Windows form? Which class did you derive the custom control from?


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5/5/2006 3:42:58 AM

Try close and reopen the Visual Studio.


5/5/2006 4:59:02 AM

It's a web form, and I derived from the Control class, and implemented the INamingContainer interface.

I wanted to point out also, that if I created a derived/inherited control, it still doesn't work.

e.g. CustomTextBox control that inherits from System.Web.....TextBox Control

Any third-party controls, or any controls I create can be added to the toolbox, but then I CANNOT drag them onto the form.

5/5/2006 6:03:17 AM

Libor: I tried restarting VS.NET, and it didn't work.


I even restarted the PC, and it still didn't work! :(

5/5/2006 6:04:15 AM
I believe Web controls should be derited from WebControl.


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5/9/2006 6:38:49 PM

The control works perfectly on another computer, but on my machine using the current Visual Studio .NET installation, it simply won't allow me to drag and drop any controls I create.

Only the included web controls work.

Any other ideas?   

5/9/2006 8:49:44 PM
Well you can do this in your page code... Just add the reference to your control... and then add one the place you want. 

<%@ Register tagPrefix="controls" tagName="WhataControl" src="..\Controls\MyControl.ascx" %>

5/9/2006 11:34:51 PM

I'm having exactly the same problem :( I might give up and just reinstall VS2003.

Any advice would be appreciated from anyone who's come across this.


10/1/2006 11:26:43 AM

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