I am currently using RadAsyncUpload with ManualUpload="true". I have  MultipleFileSelection="Disabled" but will allow multiple file inputs.

I am also using RadProgressArea.

Is there a way to check for invalid files before I fire startUpload(); ??
Or if not, can I stop the upload without removing all of the inputs? 

If I cancel, can I restart the upload without removing all of the inputs?

Thanks, Marty

Hi Marty,

To limit the maximum allowed file inputs set MaxFileInputsCount property:
Regarding file validation you could browser this online demo which demonstrates the same functionality as you need.

Regards,
Hristo Valyavicharski
the Telerik team

Hristo,

not sure I follow.  The demo says:

"The sever-side FileUploaded event is fired separately for each and every uploaded file. Each file can be marked as a valid or invalid using the IsValid property of FileUploadedEventArgs. Valid files are automatically saved to the target folder."

Here is my problem.

I might select 3 separate files.  2 of them pass my validation, but the 3rd one does not.

I do not want the user to upload any of the files unless they all pass, also I don't want to remove the selected files that did pass validation. And ideally I want to show/ highlight the file that did fail validation.  It could be removed and placed in a separate list like the demo.

Keep in mind I am using manual upload button.

Can I validate each file when it is selected but before I start the manul upload?

Hi Marty,

RadAsyncUpload will validate each of the selected files automatically. If some of them doesn't pass the validation you could handle OnClientValidationFailed event and display notification message with wrong file name. Additionally you could check if three files are selected. I''m attaching small sample demonstrating how to achieved this functionality.

Regards,
Hristo Valyavicharski
the Telerik team