Code folding is NOT working on a user control c# file

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Harlock123
Created

I have a project with a LARGE c# file that houses a usercontrol for a on-screen WinForms Grid. There are over 20000 lines of code in this file. The project has a number of WinForms files that all work fine but the code folding options when this c# file is in the editor do NOTHING and no errors of any kind are shown. Rider just does nothing.

Incidentally the WinForms designer crashes as well on this file and I have to turn the designer off. The project otherwise compiles and runs just fine. In Rider as well as VS2019 or VS2022 (Where folding and the designer on either VS version work as expected)

Anyone have any ideas?.

I have read and tried all of the applicable other tips in these forms having to do with code folding and deactivating or re-activating the WinForms designer

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Dmitry Kazantsev
Created

Hello,

Thank you for contacting Rider support.
We are sorry to hear that you have run into such a problem.

Would you mind sharing IDE logs with us, so that we can take a deeper look at the issue?

  • Open project in Rider;
  • Enable WinForms and Editors trace scenarios via Help → Diagnostic Tools → Choose Trace Scenarios;
  • Close Rider and clear everything in `%LOCALAPPDATA%\JetBrains\Rider{version}\log`;
  • Open Rider again and reproduce the issue:
    • Open the problematic designer.cs and reproduce the issue with folding;
    • Open the designer, so that it crashes;
  • Collect logs via Help → Collect Logs and Diagnostic Data;
  • Disable trace scenarios enabled;
  • Upload the generated archive to the Upload service and let me know the upload ID;

Thank you in advance and have a nice day!

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Harlock123
Created

Done

Upload ID

2024_01_11_hrdbQPeZegm95MhPdq7z31

 

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Dmitry Kazantsev
Created

Thank you!
I see Rider fails to parse the TAIGridControl.cs file. That one is the problematic one, right?

Specifically, it fails on line 3031 (3031-3042 lines as per the logs).

Would it be possible to share any of the following? (the higher is better)

  • Your solution, so that we can reproduce the issue and debug the problem;
  • The specific problematic file;
  • Piece of code that is around the mentioned lines (If the lines fall into parts of a method, please include the entire method, screenshots with line numbers would be fine);

Please use the same method (upload service) of upload (so that only JB employee can access to these files);

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Dmitry Kazantsev
Created

Additional note:
Would you mind sharing a full-screen screenshot of Rider with problematic file (where you can't fold the text) opened?

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Harlock123
Created

As the project is on my GitHub publicly it can be had at

https://github.com/Harlock123/TAIGridControlDLL.git

 

And you can open that cs file in its entirety

Thats the same file that has the folding issues (There are some other forms in that project that do NOT have that problem so perhaps both problems are related to the parse issue you noted…

 

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Dmitry Kazantsev
Created

Hello Harlock,

Thank you for sharing the project.

Folding doesn't work
Do you have code highlighting in the problematic .cs file? If it is not complete (you see only a couple of colors, as in the screenshot below), please try switching the analysis on, as shown in the screenshot. Note: you will need to wait for several seconds before Rider analyses the whole file:

If the file is highlighted fine (as in the next screenshot), but you have no folding options, please tell me.

Explanation for this: Rider suspends code analysis in large files for performance reasons. Due to this, code folding is by default not available in such files. If missing a folding option in that scenario disturbs you, you are welcome to upvote this issue: Support code folding when analysis is disabled on document (due to file size threshold). 

Designer fails to load a form
I reproduced the issue and reported it to our tracker: Designer fails to load a form. A developer will take a look. Please follow the issue page for further updates regarding this issue. At the moment I have no workaround to suggest, regrettably.

Have a nice day!

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