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PODoes this C# routine to delete all files that are NOT in an array look alright?
 

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  1. PODoes this C# routine to delete all files that are NOT in an array look alright?
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    <p>I have a DB that contains a list of paths to files. I want to build a routine to cleanup the folders, removing files in the directories if there is not a db record for it (for temp ajax file uploads, in cases where the user doesn't complete the form, etc...).</p> <p>I'm thinking something like this:</p> <pre><code>var dbFiles = db.allPaths(); var allFiles = Directory.EnumerateFiles(path); foreach (var f in allFiles) { if (!dbFiles.Contains(f) { File.Delete(f); } } </code></pre> <p>Any "Gotchas" waiting for me? The routine will be set to run once a week at first, more often if temp files become a problem. It will be run during a time when there are nearly no users on, so performance - while important - is not paramount.</p> <p><strong>UPDATE</strong></p> <p>Wow, lots of great answers. This bit of code is turning into something "share" worthy. ;D My code above was just a simple, quick placeholder bit... but it's transformed into solid code. Thank you!</p>
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    1. USChaddeus
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    1. COWhy do you use "var"? This rather new language construct is powerful for use with LINQ, but I regard it an anti-pattern to use var throughout your whole source code where it is not necessary.
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    2. COI'd say var is another step towards making code more change-friendly. So long as you keep methods small and your naming good, var is convenient and legible, while still being strongly typed. As C# becomes more dynamic, I think var will just become more useful. So while it may come down to preference, I think anti-pattern is over the top.
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      1. USMcMuttons
 

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