Hello lma,
I am just checking the progress of this issue and was wondering if you managed to achieve your goal or if you need any further assistance on the matter.
If the above suggestion helped you solve your issue please verify the thread as answered so other users may take better advantage of it.
Hello Ima,
I have been looking into your enquiry, however there is no built-in functionality that would synchronize the underlying DataSource with the XamDataGrid’s Records, since there are too many types of data that can be used. Nevertheless I can suggest you look into this forum thread where Stefan has shown a custom approach on how the XamDataGrid’s sorting and filtering can be replaced with the DataSource ones’, which seems to be the closest thing to your requirement, which will not result in a performance overhead: http://es.infragistics.com/community/forums/p/63907/323428.aspx
Please let me know, if I can be of any further assistance on the matter.