Winforms C# app does not open on other user instances

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Hello everyone,
I made a WinForms App using C#, and even created an installer for it. However, as soon as I double-click it from another user, it just wouldn't open.

Can anyone please help?

What I have tried:

I tried changing the file paths in my code to make them depend on the user files and folders, but it doesn't change anything.

Posted 26-Jul-23 22:13pm

LiterallyGutsFromBerserk

Updated 26-Jul-23 23:16pm

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Graeme_Grant 27-Jul-23 4:25am

Have you tried adding an unhandled exception handler and show the error message?

LiterallyGutsFromBerserk 27-Jul-23 4:34am

What I did was publish the app, then copy the published app folder (including the setup) into another user's folder (using a shared directory) before starting it. While it does work with my session, whenever I log in with another session, it doesn't work

Graeme_Grant 27-Jul-23 4:45am

You did not answer what I asked.

LiterallyGutsFromBerserk 27-Jul-23 5:02am

how do I add an unhandled exception handler

Richard MacCutchan 27-Jul-23 4:30am

"Can anyone please help?"
As it stands, most unlikely. We have no idea what your application does, or even which version of .NET it was built against.

LiterallyGutsFromBerserk 27-Jul-23 4:33am

My application was built using .NET Framework 4.7.2 and basically takes a query from a databaseand puts it in a datagridview, before exporting it to Excel.

Richard MacCutchan 27-Jul-23 4:41am

Well that still does not tell us anything useful as to why it is failing. You need to add some debug/logging code to your application to find out what is going on.

BillWoodruff 27-Jul-23 4:47am

"as soon as I double-click it from another user, it just wouldn't open."

please be specific.

LiterallyGutsFromBerserk 27-Jul-23 5:08am

Sorry if I'm not being specific, but after publishing the app, I copy the files into another directory, and nothing happens. I tracked movement in the Task Manager, but nothing happens.

CHill60 27-Jul-23 4:49am

Have you tried looking in the event log to see what's going on - and what do you mean by "session" - is this someone else's machine, or same machine different logon?

LiterallyGutsFromBerserk 27-Jul-23 5:03am

same machine different logon

CHill60 27-Jul-23 4:51am

You might also want to have a look at this CodeProject article Debugging Live Systems[^]

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Graeme_Grant · Answer 1 · 2023-07-26T23:16:00

Solution 1

To see what is happening, try capturing undandled exceptions: Application.ThreadException Event (System.Windows.Forms) | Microsoft Learn[^]
Store to a file and raise as a MessageBox so that you can see what the error is.

Posted 26-Jul-23 23:16pm

Graeme_Grant

Comments

LiterallyGutsFromBerserk 27-Jul-23 5:19am

It might have to do with my database being local. That's why I'll try and see how I can make it present on the network