When I first wrote the original version of the Mask Email Image Generator (Email Obfuscator), I didn't bother to add any code to periodically remove the images from the server. Yesterday I discovered it had almost 50,000 images in that folder. Not to repeat the same mistake, I wrote a function to delete image files that are older than 3 minutes. Sample code follows.

protected void CleanImageFolder()
{
    string imgFolder = Server.MapPath("~/lab/maskemail/img/");
    string[] imgList = Directory.GetFiles(imgFolder, "*.jpg");
    foreach (string img in imgList)
    {
        FileInfo imgInfo = new FileInfo(img);
        if (imgInfo.LastWriteTime < DateTime.Now.AddMinutes(-3))
        {
            imgInfo.Delete();
        }
    }
}

Labels: ASP.NET, Csharp, Directory, FileInfo