Temp Directory

Image Uploader uses standard ASP.NET file upload approach. It means that you have an access to the uploaded files using Request.Files[] collection only.

You can also process files using Aurigma.ImageUploader.FileUploaded event handler and its args of Aurigma.ImageUploader.FileUploadEventArgs type.

In this case FileUploadEventArgs class just encapsualtes the access to Request.Files[] collection.

As ASP.NET infrastracture handles upload automatically and doesn't provide direct access to uploaded files dumped to disk (small files are not dumped at all), you should specify in your code where you want to save the uploaded file.

For example, please check Handling Upload paragraph of Inserting Image Uploader ASP.NET Control into ASP.NET Page topic. In short you can save files using the following code:

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, System.EventArgs e)
    {

    }

    protected void FileUploaded(object sender, Aurigma.ImageUploader.FileUploadEventArgs e)
    {
        string galleryPath = "Gallery/";
        string thumbnailsPath = galleryPath + "Thumbnails/";

        Aurigma.ImageUploader.SourceFileInfo sourceFile = e.SourceFile;
        Aurigma.ImageUploader.ThumbnailInfo thumbnail = e.Thumbnails[1];

        string safeFileName = sourceFile.GetSafeFileName(Server.MapPath(galleryPath));

        sourceFile.Save(Server.MapPath(galleryPath + safeFileName));
        thumbnail.Save(Server.MapPath(thumbnailsPath + safeFileName));
    }
}

Edited by user Monday, March 15, 2010 10:59:45 AM(UTC)  | Reason: Not specified

ASP.NET infrastructure automatically deletes temp files. You don't need to take care about it.

You should save the upload files in the final location using SaveAs method or InputStream property. If you didn't do it, the files are deleted automatically.

Most probably you should use Web farm to serve ~5000 users where each server should have its own temp directory.

If it doesn't meet your requirements, then you can implement a custom HttpModule to process uploaded files without creation of temporary files.