I've just downloaded the new AjaxControlToolkit from codeplex to give the much anticipated AsyncFileUpload control a go, but unfortunately it has fallen at the first hurdle...
I have put it on a fairly simple page called uploadFile.aspx which takes a url argument:
uploadFile.aspx?myDbId=1
In the page load, it's doing stuff with Request["myDbId"].
When selecting a file using the new control, it posts it back straight away, but it hits a 500 error with the Request["myDbId"] line because it has stripped ALL url arguments and replaced them for it's own:
uploadFile.aspx?AsyncFileUploadID=ctl00_BodyPlaceHolder_ctl00&rnd=08382490910589695
This to me is a massive problem, and one I haven't been able to get around. Any solutions?
Here's an alternate solution if that one doesn't work out. This solution has been around for a year or two, and it is his second version. It includes a progress bar that doesn't require a flash dependency, and can handle very large files without problems.
ASP.Net File Upload Module v2
http://darrenjohnstone.net/aspnet-file-uploaddownload-module-v2-documentation/