Data Binding
RadBreadCumb internally uses an invisible RadTreeView to manage the hierarchical structure if there is not associated tree view via the RadBreadCrumb.DefaultTreeView property. You can access it via the InternalTreeViewElement property of the RadBreadCrumbElement.
When the RadBreadCrumbElement.DefaultTreeViewElement property is set (which means that you have an associated tree view), the InternalTreeViewElement will be ignored.
Define Relations in RadBreadCrumb
Since RadBreadCrumb internally uses a RadTreeView, you can use the data binding options that RadTreeView offers. The following code snippet demonstrates how to define relations between 3 different data collections and build 3-level hierarchy:
RadBreadCrumb bound to the MusicCollection database
this.radBreadCrumb1.IsAutoCompleteEnabled = true;
this.radBreadCrumb1.DataSource = this.artistsBindingSource;
this.radBreadCrumb1.DisplayMember = "ArtistName";
this.radBreadCrumb1.ValueMember = "ArtistID";
this.radBreadCrumb1.RelationBindings.Add(new RelationBinding(this.albumsBindingSource, "AlbumName", "ArtistID", "ArtistID", "AlbumID"));
this.radBreadCrumb1.RelationBindings.Add(new RelationBinding(this.songsBindingSource, "SongName", "AlbumID", "AlbumID", "SongID"));
Me.radBreadCrumb1.IsAutoCompleteEnabled = True
Me.radBreadCrumb1.DataSource = Me.artistsBindingSource
Me.radBreadCrumb1.DisplayMember = "ArtistName"
Me.radBreadCrumb1.ValueMember = "ArtistID"
Me.radBreadCrumb1.RelationBindings.Add(New RelationBinding(Me.albumsBindingSource, "AlbumName", "ArtistID", "ArtistID", "AlbumID"))
Me.radBreadCrumb1.RelationBindings.Add(New RelationBinding(Me.songsBindingSource, "SongName", "AlbumID", "AlbumID", "SongID"))