How to associate file extension with my program in C#?

Question

1.00/5 (1 vote)

See more:

I made a sudoku game that saves the game to a ".sudoku" file, I want all ".sudoku" files to open with my program and show the icon of my program.

What I have tried:

c# - Associate File Extension with Application - Stack Overflow[^]

Posted 8-Nov-16 20:56pm

john1990_1

Updated 8-Nov-16 23:27pm

Add a Solution

Comments

Mehdi Gholam 9-Nov-16 4:01am

...and what is the problem?

john1990_1 9-Nov-16 4:08am

the code doesn't run for me, maybe in:

CurrentUser.DeleteSubKey("UserChoice", false);

I should replace "UserChoice" with something?

Mehdi Gholam 9-Nov-16 4:11am

Try running as admin.

john1990_1 9-Nov-16 12:03pm

see below

Richard MacCutchan 9-Nov-16 5:11am

Since you have the link to the StackOverflow answer, that is the place to ask the question.

john1990_1 9-Nov-16 8:19am

the ".sudoku" files got their icon as my program and now open with my program after calling the method in Main in the beginning of Main, but the program doesnt open, even if i run it as admin after publishing and installing it, the program just doesnt appear.

When i commented the line that runs the the method and published it and installed it, the window of the program opens and there's no problem, so calling this method disables opening the main form even when i right click and choose run as admin.

Richard MacCutchan 9-Nov-16 8:23am

Sorry, but I have no idea what those two sentences are supposed to mean.

john1990_1 9-Nov-16 8:32am

when the user runs my sudoku program for the first time, i call the method SetAssociation, it works, the ".sudoku" files now have the icon of my program and run as and in my program when i double click them, but the main windows that is called in Main after SetAssociation:

Application.Run(sudoku_Form = new Sudoku_FORM(args));

doesn't open, it's as if the program exited in or after SetAssociation.

I run the program by right clicking and chooseing "Run as admin".

when i comment the line that calls SetAssociation and publish (make an installer) and install it and run it, the window appears and the program works.

Richard MacCutchan 9-Nov-16 8:52am

If you want to set the associations when the program first runs, then it must run with Administrator privilege. Just the same as most self-installers.

john1990_1 9-Nov-16 9:17am

yes, the association has been set, the program successfully makes the association on first run, but the main window doesnt open afterwards when i call afterwards:

void Main(string[] args)
{
SetAssocation(....);//this runs well
//program deosnt arrive here
Application.Run(sudoku_Form = new Sudoku_FORM(args));//this doesnt run at all
}
the window of my program doesnt open, only the file association is set.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

#realJSOP · Answer 1 · 2016-11-08T23:27:00

Solution 1

Well, a solution was provided at the link you cited, so your only recourse at this point is to be an actual programmer, and put an exception around the code, a break point in the catch block, run the app in the debugger, and wait for t to fail. The exception (if thrown) will tell you exactly what's wrong.

You need admin rights to modify the registry, and my spirit animal suggests that you're probably not using an admin account.

Posted 8-Nov-16 23:27pm

#realJSOP

Comments

john1990_1 9-Nov-16 5:36am

i debugged it, it said:

Access to the registry key 'HKEY_CLASSES_ROOT\.sudoku' is denied.

how do i run it as admin from visual studio?

john1990_1 9-Nov-16 8:21am

see above