First of all i want to mention that, you are going towards wrong direction. You can serve your purpose without going to another page. Following is a very simple solution for multiple image upload.
Multiple Image Upload in ASP.NET
If you are still looking for going to another page then upload images and come back to previous page with saved image. Let me know the reason, why you need to do that??
I hope the following link will fulfill your requirement with single page concept.
Multiple files uploader with preview on client side