You can upload multiple images at once using the single file upload control. Rather you can use datalist and put fileupload control to make it multiple. For doing multiple files upload, you have to put multiple FileUpload controls.
Theoretically, multiple files upload is pretty straight forward, but practically there usually are issues when the total size of the files become large.
Note, that the trick uses multiple forms system. When used inside asp.net form, it wont work. (because nested forms are not supported by browsers). You can either put it outside your main runat=server form, or use an iframe.
Hope this will help youSaritha.rajeshkumar, if this helps please login to Mark As Answer. | Alert Moderator