Hi,
Working with John we've uncovered a little more where the problem lies. Within RadAsyncUpload.js we encounter a nullreference or "undefined" exception in the function below:
"frameDocument" becomes set, however, "inputInfo" is undefined.
The problem can be consistently reproduced, though the process is fairly complex. We have a page which contains a user control, which in turn, contains our AsyncUploader.
Our page displays the user control via an async postback using RadAjaxManager. The user control is always on the page, but initially visibility is set to false.
See Screenshots:
screenuchidden.jpg -> Page with user control hidden
screenucvisible.jpg -> User control shown
To replicate the problem, we show the user control and hit "Save" without attaching anything with the AsyncUpload. The user control is then hidden again.
We then go to add another "New Proof", and attach a file. When the AsyncUpload process starts it breaks with the exception John had mentioned in his original post. Strangely, we can then click "Remove" on the uploader and re-select a file and the upload process works again.
In an attempt to summarize our problem: When we try to attach/upload a file, the upload
always works
... unless it's followed by a postback in which no file was selected for attachment.
If I can clear this up any further please let me know. Thanks!
Daniel