CODEWITHSUNDEEP
c#visual-studio-2008clickonce
chicco
chicco

Reputation: 147

ClickOnce deployed application asks to install update even if there exists none

I have ClickOnce deployed application coded in C#. I wonder if anyone experienced the same problem.

Clickonce deployed application checks for updates always before execution. One of my clients using this application informs me about an update which the application asks to install even if there exists no update we had deployed. My clients installed the update. But what was installed is the same version. At this point, I wonder why a clickonce application decides if there is an update deployed. I believe this is a weird problem that I could not figure out why it happened.

Is there anyone who knows why such a weird thing could happen ? I suspect may be some of files of the installation removed, thus leading a reinstallation of the program. But I am not sure.

Upvotes: 1

Views: 789

Answers (1)

ean5533
ean5533

Reputation: 8994

We've had this problem before with some of our clients. The problem ended up being due to object caching on their proxy server. Basically, the client actually is running an old version, so when they start your program, ClickOnce correctly reports that there is an update available. The problem is that the client's proxy server caches an old copy of your program, so when the updater runs the proxy server intercepts the update request and instead sends back a cached copy of your program in place of the update. ClickOnce doesn't notice until its next startup that the "updated" program still isn't actually updated.

The solution is to get in touch with your client's IT staff and try to figure out where the caching is happening and have them clear the cache. It's probably on their custom-built proxy server, but webfilters like Barracuda do object caching too, and so do some of the fancier Cisco routers.

Upvotes: 2

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