WinForms databinding on many-to-many relashionship

Hi,

Could someone explain how to deal with databinding on many-to-many relashionship ?

Especially : can this work on ListBox, CheckedListBox ans TreeView native/custom controls ?

Thanks

I'm very interested in the answer to these questions as well.

Thanks in advance,

Steve

How do you mean? I believe nettiers objects support loading data for many to many relationships via Entity.[ChildType]Collection and Entity.[Type]_Collection_From_[ChildType]. If you deep load all these (ChildType and Type) and use a binding source (or anything that has a currency manager) then you should be able to bind without any hustles. e.g if you have the types User, UserRole and Role in a many to many relationship you can deep load using:

UserService userService = new UserService();

User user = userService.GetByUserID(1);

userService.DeepLoad(user, true, Data.DeepLoadType.IncludeChildren, new Type[] {typeof(TList<UserRole>), typeof(TList<Role>) });

Use two binding sources UsersBS and RolesBS. Set UserBS.DataSource = user and RoleBS.DataSource = user.RoleCollection_From_UserRole.

This should work.