Customize Dialog window prism

Question

I have implemented the new DialogService as shown in this issue A New IDialogService for WPF

However, this doesn't explain how to edit the window of the dialog itself, since the NotificationDialog is a UserControl .

I have tried changing it to a Window but then an exception is raised due to not being the root Window.

Any idea how can I change the Window of the dialog?

Since the Title and the Icon is set in DialogViewModelBase , I have tried to add a ResizeMode property as well.

In DialogViewModelBase :

private ResizeMode _resizeMode;
public ResizeMode ResizeMode
{
   get => _resizeMode;
   set => SetProperty(ref _resizeMode, value);
}

and in NotificationDialogViewModel implementation:

public NotificationDialogViewModel()
{
    Title = "Notification";
    ResizeMode = System.Windows.ResizeMode.CanMinimize;
    CloseDialogCommand = new DelegateCommand(CloseDialog);
}

However it doesn't work as intended.

Answer 1

For others who search for this - the style can be set using prism:Dialog.WindowStyle .

Example from https://github.com/PrismLibrary/Prism/blob/master/Sandbox/Wpf/HelloWorld/HelloWorld/Dialogs/NotificationDialog.xaml

New link: https://prismlibrary.com/docs/wpf/dialog-service.html#style-the-dialogwindow

<UserControl x:Class="HelloWorld.Dialogs.NotificationDialog"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:prism="http://prismlibrary.com/"
             prism:ViewModelLocator.AutoWireViewModel="True"
             Width="300" Height="150">

    <prism:Dialog.WindowStyle>
        <Style TargetType="Window">
            <Setter Property="prism:Dialog.WindowStartupLocation" Value="CenterScreen" />
            <Setter Property="ResizeMode" Value="NoResize"/>
            <Setter Property="ShowInTaskbar" Value="False"/>
            <Setter Property="SizeToContent" Value="WidthAndHeight"/>
        </Style>
    </prism:Dialog.WindowStyle>

    <Grid x:Name="LayoutRoot" Margin="5">
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <TextBlock Text="{Binding Message}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Row="0" TextWrapping="Wrap" />
        <Button Command="{Binding CloseDialogCommand}" CommandParameter="True" Content="OK" Width="75" Height="25" HorizontalAlignment="Right" Margin="0,10,0,0" Grid.Row="1" IsDefault="True" />
    </Grid>
</UserControl>

Other properties can also be set using Setter . For example,

<Setter Property="WindowStyle" Value="None" />

will hide the title bar.

Answer 2

Any idea how can I change the Window of the dialog?

Looking at the code , it looks like you have to implement IDialogWindow and override the default registration to the built-in implementation.

Also, you don't need to inherit from DialogViewModelBase , just implementing IDialogAware suffices.