Binding an object to data grid cell - conditional cell style

Question

TL;DR: if a DataGrid cell is bound to a specific object (not string, int, ...), how can I access it in converter or setter?

Answer 1

You can't really store the Person object in the DataRow. You can confirm this yourself:

var dr = dt.NewRow();
//set the Name column to a Person object
dr["Name"] = new Person(name, age >= 18);
//...and retrieve it. It is now a string:    
var thePerson = dr["Name"] as string;

Mixing an object model with a DataTable is not a good idea. You should replace the DataTable with a collection of custom objects. Then you will be able to use a value converter or a DataTrigger to set the Background property of the cell.