WPF Datagrid in place editing.

Question

I have two issues in wpf :

 

 

1. I am working on a project in WPF where I have do give excel style edit and add facility in a datagrid. Initially the datgrid will be normally displayed and  

    when a user clicks on a cell the whole row will be changed in edit mode with multiple controls like combobox,checkbox and datepicker in columns.

 

2. How to populate another combobox say City ComboBoox on change event of Country ComboBox inside a datgrid in edit mode  using LInq to SQL classes

    only.

 

 

Can you post a project or snippet for this ?