Need help on Upgradation of application

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Hi,
My question is not directly related to programming. I want to know the best approach for updating the application. The way I know is to replace the .exe file in your application file with the new updated one. But I wonder how different applications do this while they are running and updates are downloaded from internet.

Any help please?

Thanks

Posted 7-Dec-11 5:16am

Furqan Sehgal

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Mehdi Gholam · Answer 1 · 2011-12-07T05:31:00

Solution 1

One way is to create a very basic loader EXE (with a splash screen) that dynamically loads the main application as a series of DLL files.

This loader can replace the old DLL files that have been downloaded to a "Update" folder if updates exists and load the main DLL as usual.

Posted 7-Dec-11 5:31am

Mehdi Gholam

Sergey Alexandrovich Kryukov · Answer 2 · 2011-12-07T05:53:00

Yes, the question is pretty much pointless. First, replacing of just one executable file is dangerous as the software product usually have several ones and the main application file usually depends on others, especially DLLs. There are different systems for partial upgrade, but they all are based in some meta-data manifesting versioning and dependencies. Such upgrade systems are pretty complex.

Another thing to remember: when any process is running, it is impossible to delete, modify or replace any of the executable files loaded by this process, as well as data files opened for exclusive use, which is the default. That said, for any upgrade, an application needs to be closed.

—SA

Albert Holguin · Answer 3 · 2011-12-07T07:19:00

Solution 3

Another method is to load the updates into an upgrade folder and launch an installer application from there (there's a variety of installers available). First task of the installer, make sure the application you're upgrading is closed.

Posted 7-Dec-11 7:19am

Albert Holguin

Comments

loubnabertat 17-Dec-11 10:16am

Hi,
i'm a new member in this web site i need your help to déploiement an application i have created with VB.NET 2008.So please help me .Thank You

Albert Holguin 19-Dec-11 9:05am

Post your questions in the Q&A or the development forums portion of the website. Don't ask individuals for help like this.