Dealing with Datagrids in WPF Application

[AaliyahS]

I Really need help in this ...I'm building an application where I need to have somethings in the datagrid.I want to have the datagrid to have drop-down lists, these lists will will change depending on other drop-down values, also depending on previous values. I can handle this ...I want to know how to know how to create the datagrid, i.e. how to add columns (statically), rows (dynamically).Mainly, the data will be stored in XML file.