Create tree on jQuery

It is necessary to implement such a tree [login to view URL] What need to do: • Need to do a tree like in the example (without buttons Collapse All, Expand All). • Only needs to do the "drag and drop" as entire folders (child folders) and documents separately • When you drag the result should be stored in the database. The architecture of the database can be any. • Saving should work through AJAX • When there is a saving to the database needs to spin progress (as in the example). • All you have to implement only on jquery (with all extensions and plugins), ASP.NET 4.5, MSSQL 2012 (Express version). Resources (pictures and everything you need) you can take from the example. The design is not important, but if it is similar to the original example, it's good.