Hi,
Consider the following implementation.
Initially No rows in datagrid and user enters a row in data grid which have three columns Country, State and Districts. After inserting a new row Countries column must get populated with all countries and after that according to Country -> states get selected and according to States -> district gets selected.
I implemented first using wpftookit and MVVM. All is working fine but when the same data grid is replaced with presentation framework datagrid the drop down of states and districts will not at all get populated till user inserts a second row, i.e. the setter property in case of presentation framework datagrid is called only when new row is inserted.
I used the approach as mentioned at http://blogs.msdn.com/b/vinsibal/archive/2008/12/17/wpf-datagrid-dynamically-updating-datagridcomboboxcolumn.aspx
Please help me find the issue.