Hi Richard,
Thank you for choosing Syncfusion products.
There is no option to choose more than one file at same time and upload those chosen files.
But the Multiple File Upload can be achieved the following the below specified steps.
To upload multiple files, you have to place more than one upload control . You can choose the files by using the upload control and at last click the 'Upload' button which will upload the multiple files chosen in each upload control.
The online demo for the Multiple File Upload can be obtained from the following link:
http://www2.syncfusion.com/syncfusion/infrastructure/samplebrowserasp/samples.aspx?version=2_0 In the above link navigate to the Notification Package/Upload/Single and Multiple FileUpload.
Please let us know if you have any other queries.
Regards,
Valli