I am sorry to say but the targeted scenario is not supported with the current version of the controls. For now editing the grid using a custom edit form is possible only when server-side binding is used. Moreover the Batch EditMode
is also not compatible with custom edit forms.
If the requirement is to edit the grid on the client using a customized form you can try integrating the approach illustrated here
. The idea is to create an external form and handle the CRUD operations manually.