>>okay, so you're saying the only way to force a maximum number of uploads is to force the user to upload 1 file at a time?

 

No.

 

Now I set MultipleFilesUpload="true", please check this example again.

 

Uploading multiple files (Limit the maximum number of files to be uploaded)
This example shows you how to limit the maximum allowed number of files to be uploaded. In the following example, you can only upload 3 files.