Rad Docking - PreviewClose and close events -MVVM

Question

When user clicks on X, I want to check whether there are any unsaved changes in the page. I have isSaved Property which tells me that.

Now, if there are any unsaved changes, I want to show Alert window(which is in place) to confirm by user to close pane or not.

If user says Yes, I want to close. If not I dont want to close.

How can I implement this in MVVM ? I understand PreviewClose in triggering first. If there are unsaved changes, How can I stop closing the pane ?

Here are my interaction trigger.

 <i:Interaction.Triggers>
                <i:EventTrigger EventName="PreviewClose">
                    <cmd:EventToCommand Command="{Binding PreviewCloseCommand}" CommandParameter="{Binding ElementName=ContentContainer}" />
                </i:EventTrigger>
                <i:EventTrigger EventName="Close">
                    <cmd:EventToCommand Command="{Binding CloseCommand}" CommandParameter="{Binding ElementName=ContentContainer}" />
                </i:EventTrigger>
            </i:Interaction.Triggers>

See http://stackoverflow.com/questions/3683450/handling-the-window-closing-event-with-wpf-mvvm-light-toolkit — Contango, Jun 04 '15 at 22:42

score 0 · Answer 1 · edited May 23 '17 at 12:21

0

For a couple of solutions, see Handling the window closing event with WPF / MVVM Light Toolkit.

As for cancelling the window closing, you can update CancelEventArgs to cancel the event.

edited May 23 '17 at 12:21

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answered Jun 04 '15 at 22:48

Contango

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Rad Docking - PreviewClose and close events -MVVM

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