Modal Popup using ASPNet AJAX Modal disappear in postback

Hi,

I look for a good way for arrangement Admin pages Items

for example Admin Upload Page consists of these sections:

* make a new folder

* delete folder

* upload file in folder

* show folders information (in a gridview)

* download test

so I think one way is shoing this sections in modal

but when I tried make a new folder in modal after clicking in create folder button modal disappeared.

Is there any way that  modal doesnt disappeare until user click close button?

I mean I want modal to behave like a page.

If there isn't a way what's your suggestion for classification sections?