DevExpress, EF export needed

Hello Friends. I need a good DevExpress EF export for a very basic simple task. I have two DevExpress grids on a winform application. Grid 1 is for users and grid 2 for there roles with selection checkboxes. right now if some one select any user from grid 1 they can assign roles to it by selecting the checkbox from grid 2 and press save button to save the role. We need to change it that Save button should work like bulk. From grid 1 they can select user one by one and assign roles from grid 2 and save them in List<userroles> etc. and at the end they can press save and all roles should save at once. it should not take more than 30 mints for an expert cause all is there. you need to make it work with multiple user and there role to save at once.