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POWant to write to a file, but may have potentially multiple writers at once, need to lock
 

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    <p>In a asp.net web application, I want to write to a file. This function will first get data from the database, and then write out the flat file.</p> <p>What can I do to make sure only 1 write occurs, and once the write occurrs, the other threads that maybe want to write to the file don't since the write took place.</p> <p>I want to have this write done ONLY if it hasn't been done in say 15 minutes.</p> <p>I know there is a lock keyword, so should I wrap everything in a lock, then check if it has been updated in 15 minutes or more, or visa versa?</p> <p><b>Update</b></p> <p>Workflow:</p> <p>Since this is a web application, the multiple instances will be people viewing a particular web page. I could use the build in cache system, but if asp.net recycles it will be expensive to rebuild the cache so I just want to write it out to a flat file. My other option would be just to create a windows service, but that is more work to manage that I want.</p>
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      1. USDouglas Anderson
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    1. COAre all the writes happening within a single instance of a single application? Or will multiple instances of the application be attempting to write at the same time or will different applications be attempting to write at the same time?
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