WPF DataGrid validation when bound to a DataView

Question

I am attempting to validate input on a DataGrid which is populated by a DataView (e.g. myDataGrid.ItemsSource = myDataView). However, all the WPF DataGrid validation examples I have seen assume that the DataGrid source is a C# class. I can't figure out how to hook up a single cell (i.e. a column) to a code-behind validation. Can someone give an example or point me to one?

Answer 1

So I did some more research, and what I was basically missing was that I can specify the column name with the Path attribute of a Binding (or even use the column ordinal in brackets, e.g. Path="[0]"). After that realization, everything is basically the same as using a class property. So a typical DataGrid column definition I use follows:

<DataGridTextColumn Header="Regular" EditingElementStyle="{StaticResource ValidationErrorStyleBoxRA}" ElementStyle="{StaticResource ValidationErrorStyleBlockRA}" Width="60">
    <DataGridTextColumn.Binding>
        <Binding Path="HourlyRate" StringFormat="F3" ValidatesOnExceptions="True" ValidatesOnDataErrors="True" UpdateSourceTrigger="PropertyChanged">
            <Binding.ValidationRules>
                <local:HourlyRatesAmountValidate ValidatesOnTargetUpdated="True" />
            </Binding.ValidationRules>
        </Binding>
    </DataGridTextColumn.Binding>
</DataGridTextColumn>