Home / Community & Support / Developer Productivity Tools Forums / ASP.NET > Toolbar > Cannot drag and drop controls to forms in an existing .net 3.5 application

• Radhika Ganesh

  Posted on Feb 1, 2010 (permalink)

  Opened one of my .Net 3.5 applications in Visual Studio 2008, created a new aspx page.When I drag and drop a control (any control) on to the form, nothing happens. No error messages. I spend several hours searching all the solutions but no result. After dragging, when I place the mouse on the form, the rectangle appears as if it is recognizing.
  
  When I open a whole new solution, perform the same task on a new aspx page, it works fine. I campared both the forms, and there is no difference. Added the following on the aspx page. No result:
  

   

  <%

  @ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>

   

   

  Thank you.
  
  
  

• Radhika Ganesh

  Posted on Feb 1, 2010 (permalink)

  I got it resolved. I removed Telerik.Web.UI.dll from the reference, added it back from the new installation of telerik, rebuilt the solution.
  I had my machine re-imaged recently and had to reinstall everything. The solution was probably using an older version of Telerik in the reference.

• Gabriele

  Posted on Oct 12, 2010 (permalink)

  I have the same problem. I am testing the trial version to decide if telerik is the set of controls we want to buy.
  
  I am using Visual Studio 2010 and .NF 4.0
  
  I was able to create a project, all the sudden I cannot add anymore telerik controls to the page dragging them from the toolbox.
  Once you frop the object, you see the area flashing and then nothing happens, the control is not added.
  
  Even creating  an empty project I am not able to add telerik controls to it, is this a limitation of the trial version?
  
  -Gabriele
  

• Gabriele

  Posted on Oct 12, 2010 (permalink)

  I probably found the issue!
  
  There seesm to be some case where the version of the tools in the Visual Studio toolBox does not match anymore the version of the referenced dll.
  
  I had an older trial version installed and the ToolBox was referencing to that version while the project was using the latest available.
  
  Once I remove all the references from the toolbox and update them woth the current dll used in the project, everithing starts working fine again and toolbox controls can be now dragged again into the project.
  
  I think the setup or update should take care of this when installing or updating to a newver version of the DLLs.
  
  -Gabriele

• Yana Yana

  Posted on Oct 13, 2010 (permalink)

  Hello Gabriele,
  
  I'm glad that you managed to fix the issue. We'll research the reasons for it.
  
  Regards,
  Yana
  the Telerik team

  
  Check out Telerik Trainer, the state of the art learning tool for Telerik products.

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