Accessing items in ObservableCollection bound to WPF DataGrid

Question

I have an ObservableCollection bound to a WPF DataGrid in which MyClass has a Boolean flag indicating if item has been seen or not. If the item in the DataGrid is selected I want to set the MyClass.Seen property to true to indicate that it was viewed. Initially, the SelectedIndex of the DataGrid matches to the index of the ObservableCollection but if I ever sort the DataGrid using any of the various columns that it displays, the SelectedIndex no longer matches with the ObservableCollection.

Up until now I have been looping thru the ObservableCollection comparing a value in MyClass to a column value of the DataGrid's SelectedIndex row to find a match. Is there a better way to accomplish this where referencing the SelectedIndex of the DataGrid points me to the correct item in the ObservableCollection?

Answer 1

Rather than using SelectedIndex , have you tried using SelectedItem or SelectedValue ? If the DataGrid 's ItemSource is set to your ObservableCollection , then those properties should point directly to the selected contained object.