Bug Report T293800
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NullReferenceException occurs if TableView is located in the resource and the ShowCheckBoxSelectorColumn property has the True value

created 9 years ago

Setting ShowCheckBoxSelectorColumn="True" when a TableView is defined as a resource throws an exception. See the attached project. The workaround is to implement a behavior that sets ShowCheckBoxSelectorColumn="True" in the TableView.Loaded event handler.

public class TableViewCheckBoxColumnBehavior : Behavior<TableView> {
        protected override void OnAttached() {
            base.OnAttached();
            AssociatedObject.Loaded += OnLoaded;
        }

private void OnLoaded(object sender, RoutedEventArgs e) {
            AssociatedObject.ShowCheckBoxSelectorColumn = true;
        }

protected override void OnDetaching() {
            AssociatedObject.Loaded -= OnLoaded;
            base.OnDetaching();
        }
    }

Comments (1)
DevExpress Support Team 9 years ago

    Hello Mark,

    Thank you for providing the test project. I was able to replicate this issue on our side. I will forward this ticket to our R&D team and we will contact you as soon as we get any results.

    Thanks,
    Elliot

    Answers approved by DevExpress Support

    created 9 years ago

    We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.

    Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.

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