ASP.NET Uploaded File

Question

I have an ASP.NET web application that uses jQuery on client side. On one of the web forms I have a bunch of controls to fill, and an upload control. User can run upload whi

Answer 1

I think the most appropriate solution will be storing uploaded file in cache. Here is the code

    var fileKey = Guid.NewGuid();
    var fileStream = new Byte[Request.Files[0].ContentLength];
    Request.Files[0].InputStream.Read(fileStream, 0, Request.Files[0].ContentLength);
    Cache[fileKey.ToString()] = fileStream;

The fileKey GUID can be stored in ViewState, or sent as the response to client. Later, when whole form will be saved, cached file can be retrieved and stored into database with other data. The good thing about this method is that if user navigates from the page cached file will expire, thus avoiding resource flooding. We can set expiration time using

Cache.Add(fileKey, fileStream, null, DateTime.UtcNow.AddMinutes(10), Cache.NoSlidingExpiration, CacheItemPriority.Default, null);

function.