ASP.NET Schedule deletion of temporary files

Question

Question: I have an ASP.NET application which creates temporary PDF files (for the user to download). Now, many users over many days can create many PDFs, which take much di

Answer 1

Use the cache expiry notification to trigger file deletion:

    private static void DeleteLater(string path)
    {
        HttpContext.Current.Cache.Add(path, path, null, Cache.NoAbsoluteExpiration, new TimeSpan(0, 8, 0, 0), CacheItemPriority.NotRemovable, UploadedFileCacheCallback);
    }

    private static void UploadedFileCacheCallback(string key, object value, CacheItemRemovedReason reason)
    {
        var path = (string) value;
        Debug.WriteLine(string.Format("Deleting upladed file '{0}'", path));
        File.Delete(path);
    }

ref: MSDN | How to: Notify an Application When an Item Is Removed from the Cache