Question

I have researched this and am stumped: I have a WPF DataGrid, and using an MVVM model. I want to, under certain circumstances, prevent the ability to change a row in the DataGrid. I have researched this and have tried techniques like the one found here.

In practice, this works, however there is an undesirable ‘flicker’ (it selects the clicked row for a moment then goes back to the previous selection), while this is a close solution I wish there was a more elegant way such as preventing the row change at all in the first place.

I am surprised there is not a SelectionChanging or BeforeSelectionChanged so I could cancel the event from firing; and forcibly preventing the index change in my view model does not seem to make any difference.

How can I do this?

Thank you.

Answer 1

what happens if you take the previewkeydown and previewmousedown events and just call e.Handled=true under your certain circumstance?

Edit:
to satisfy the mvvm style:
you can create a Behavior with a DependencyProperty you can bind your circumstance to.
in this behavior you can handle the events and maybe some other stuff, like does the user click on a datarow or header…