Hi Anders,

First, since this is isolated to a certain machine, I would advise comparing some settings/installed software, especially VS plugins to try and find a difference. 

We've had a similar report related to VS and TFS integration. The issue was different (designer.cs fiiles were not being updated) but I will share the information with you in case it helps.

When VS2013 was tied to TFS (I am not sure of the version, perhaps 2010 was in the previous report) and the Get Everything when a solution or project is opened under Options -> Source Control -> Environment was selected, VS would not update the designed files. That was not just related to our controls, it happened with all standard controls too.

Thus, you can try unselecting this checkbox or temporarily removing source control binding to see if this is the case with you as well.

Regards,

Sorry to bring up an old post, but I have the exact issue described here (plus a slightly different one).

I have a root ASP.NET application that hosts several sub applications (they all reside in the same folder, the projects only include the relevant files for each application).

The issues are 

- I have a RibbonBar control in an .ascx that gets deleted from the designer.cs each time I save the .ascx file. I "solved" this moving the control declaration in my .cs file

- I have several pages hosting different Telerik controls which definition in the designer.cs files has the case of the tag in the .aspx file. So if the tag is telerik:radpane (all lowercase) this is the class name that I find in the designer.cs, so the project doesn't build

Any idea why these happen? Is it something related to the application structure?

Thanks

I'm having this issue as well and it's driving me crazy! We've been using the Telerik controls for almost 10 years now. After moving to VS2015, the Telerik controls occasionally get removed from the designer.cs files when an ASPX or ASCX file is edited. Moving the declarations that were in the designer file to the code-behind file instead is a work-around, but we should not have to do that. Sometimes, I can fix it by uninstalling and re-installing the controls on my machine through the Telerik Control Panel, sometimes I can fix it by removing all of the references in the project, copying the Telerik DLLs to the bin folder, and referencing them there, and sometimes no matter what I do it won't fix itself for a few hours, then all of a sudden I do one of the same steps and it works.

This seems to be tied to the NEW way Telerik is using the built-in licensing in VS2015, including the new licenses.licx file. I don't know of a solution yet.

I found something that worked for me this time:

I uninstalled the Telerik VS Extension, reopened VS 2015, loaded the solution, removed the Telerik references and the previously-copied DLLS in the bin folder, copied in the latest DLLs, added references, and then everything was working again.

Eventually, I would like to have the extension installed again, but for now at least I can continue working.

Thanks for the suggestions, Sypher!

I had this issue before installing the VS Extension, actually I tried to install it to SOLVE the problem :)

I didn't think to look in the .licx file, I will give it a shot.

Thanks again

Hi guys,

We have not had other reports about such issues and the only one we have managed to reproduce is the one I mentioned before about the TFS integration.

As for the licensing - we use the standard .NET licensing mechanism, so VS should be able to work with it without issues. Nevertheless, you can try deleting the contents of the license file, or deleting the entire file to see if this helps. This will cause VS to generate it again, so it should be correct.

I will also add the information you have provided to the Design-time Troubleshooting article for anyone else who stumbles upon such a problem: http://mbratano/devtools/aspnet-ajax/general-information/troubleshooting/design-time-troubleshooting#designer-files-are-not-updated-or-are-missing-telerik-controls. This new section will go live with our next documentation upload.

If you find further information, feel free to contribute to our GitHub repo with the details. The easiest way is to click the Edit this Page button on the top right-hand side corner.

Regards,

More about my environment. I have two machines I work from: one at the office and one at home. Both are running Windows 10 Enterprise with VS 2015 Enterprise. I am using visualstudio.com for TF​VC. The project has multiple master files, user controls, and pages.

After deleting the .licx file yesterday, removing the Telerik VS Extensions, and redoing the DLLs and references, everything was working fine. I checked in my changes and went home. No new .licx file was created. There is a lib\RCAJAX\2015.2.826.45 folder structure in the solution, but it has no files. I did some work on the project from home and everything was still fine. Checked in my changes and came back to work today. Manually got latest, started working on an ASCX page, and voila, the Telerik entries were automatically deleted from the designer file again.

The VS Get Everything when a solution or project is opened isn't the issue. I don't have that turned on, and the problem isn't that the designer files aren't getting updated, it's that they ​are getting updated, albeit incorrectly, as soon as I save changes to an ASPX or ASCX file.

It very well could have something to do with version control or with licensing, but without knowing exactly what is happening, I wouldn't want to list all of the things we are trying in the GitHub repo.

The empty lib folder structure is interesting to me. I'm going to try to get this all working again today and see if that has anything to do with it...

I've tried every combination of using DLLs from the GAC, not from the GAC, in the bin folder, assembly listed in the web.config, Extensions installed and uninstalled, and I haven't been able to get back to working. I tried what worked yesterday and it didn't work today. So I'm stuck again. I keep thinking, "This shouldn't be so hard" and "it's got to be something simple," but nothing is working. This is a freshly installed machine, but I'm using a very old solution, so maybe something else is messed up in here. It's just not immediately obvious. Still no license file, so that is a bit odd. Oh well, time for lunch.

Just tried from a different machine running Windows 8.1 and VS 2013 and the same project worked fine. So since this machine is all still fresh, I decided to totally delete the local copy of the solution and then Get Latest from TFVC. That worked! So my only guess is something was messed up on the local copy of the solution. It would be nice to know what that was specifically. As I'm sure this will come up again, next time I'll try to wipe the local solution first.

I still don't have a .licx file. I'm confused as to when it should show up.

Hi,

The ~/lib folder is where our VS Extensions can store files when getting a new release directly from VS. You can control that folder's location from their options: http://docs.telerik.com/devtools/aspnet-ajax/general-information/integration-with-visual-studio/visual-studio-extensions/visual-studio-extensions-options.

As for the license file - VS should generate it when you add a new licensed control to the markup. For example, if you add a new form and add a RadEditor on it, VS should generate the license.licx file in the root and the App_Licenses.dll in the BIN.
If you only edit existing control declarations, the license file would not be generated.

Regards,

I just had the same issues again. Everything is working one day, then the next time I open an ASPX or ASCX file to edit it, all of the Telerik controls get removed from the designer file and won't come back. If I create a new Telerik Web App, it works fine in there, so at least my environment seems to all be okay.

 This time, after removing the Telerik references and DLLs and setting them back up, it still wasn't working. Then, I deleted the solution's .SUO file (now located in the .vs folder for VS2015) and restarted VS and it worked! Not sure if that was the fix or not. I'm just posting this here so I know what to try first next time. It may have been the SUO file all along. :-P

Hello,

I have added this idea to the article: http://docs.telerik.com/devtools/aspnet-ajax/general-information/troubleshooting/design-time-troubleshooting#designer-files-are-not-updated-or-are-missing-telerik-controls. This concrete bullet will be live with our next upload.

I do hope that this will resolve the issue for you.

Regards,

I wasn't expecting to have the issue again so soon, but it happened again today. Possibly caused by me upgrading to the 2015 Q3 version that just came out.

Deleting my .SUO file before doing anything else solved the issue! However, I still consider this a workaround. We still don't know why this is happening in the first place. I may try to look at the differences between the bad .SUO file and the new one created after I delete it...