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How to automatically delete files older than X in a folder

Posted on 2010-11-30
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Last Modified: 2013-11-07
We have a .net program and we create various log files and want to delete them after a certain amount of time. What is the best way to do this?
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Question by:jamesh1031
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LVL 75

Expert Comment

by:käµfm³d 👽
ID: 34241893
You can loop through the directory and check the time against a target value. For example, if you wanted to delete those older than 30 days, you could use:
public static void PurgeDirectory(string path)
{
    System.IO.DirectoryInfo info = new System.IO.DirectoryInfo(path);
    DateTime targetDate = DateTime.Now.AddDays(-30);

    foreach (System.IO.FileInfo fi in info.GetFiles())
    {
        if (fi.LastAccessTime > targetDate)
        {
            fi.Delete();
        }
    }
}

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Accepted Solution

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käµfm³d   👽 earned 2000 total points
ID: 34241948
If you use the above, you should be a bit more cautious by checking that the path exists before trying to get its files:
public static void PurgeDirectory(string path)
{
    System.IO.DirectoryInfo info = new System.IO.DirectoryInfo(path);

    if (info.Exists)
    {
        DateTime targetDate = DateTime.Now.AddDays(-30);

        foreach (System.IO.FileInfo fi in info.GetFiles())
        {
            if (fi.LastAccessTime > targetDate)
            {
                fi.Delete();
            }
        }
    }
}

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