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c#asp.netcaching
Nick
Nick

Reputation: 7525

Invalidating a cache object in ASP.NET

I am maintaining an application in which the developer has used data caching in the following manner:

HttpContext.Current.Cache["key"] = myDataSet;

He hasn't specified when this cache gets invalidated. The myDataSet is a result of a SELECT from the database. The database was updated, but the cache is not invalidated. I do not want to change the source code. I simply want to invalidate it. I tried iisreset with no luck.

Upvotes: 1

Views: 1141

Answers (4)

Chris Ballance
Chris Ballance

Reputation: 34337

If you re-save the web.config, the app pool will recycle more gracefully than an iisreset, with the same result for the cache.

Upvotes: 3

Keplerf1
Keplerf1

Reputation: 84

iisreset should work. Whenever the ASP.Net application is unloaded from memory it will clear out any server managed Session data. Even just touching the web.config should unload the app.

Upvotes: 1

Nick
Nick

Reputation: 7525

iisreset did work! I did'nt notice the changes as the IE was caching the datasets. So, the original question is not fully accurate.

Thanks

Upvotes: 0

Olaf
Olaf

Reputation: 10247

The solution is going to be somewhat dirty anyway if you can't change the code (the clean way would be to use SqlCacheDependency).

Can you change the Global.asax.cs (although it's source code as well)? You can access the HttpContext from here and empty the cache in your code.

Upvotes: 1

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