Question

I am creating an application to show a list of windows services not running. the problem is that those services should reflect any changes occurring, that is if a service starts, that service should be removed from the displayed list.

I used a ListView, here is the code:

<Window.Resources>
    <ObjectDataProvider ObjectType="{x:Type local:NotifiableServiceController}"
    MethodName="GetServices" x:Key="ManageServices">
    </ObjectDataProvider>
</Window.Resources>

<Grid>
    <ListView Name="lstViewServices" Width="Auto" ItemsSource="{Binding Source={StaticResource ManageServices}}"
                SelectionMode="Single">
        <ListView.View>
            <GridView>
                <GridViewColumn Header="SoftOne Services" DisplayMemberBinding="{Binding Path=DisplayName}" />
                <GridViewColumn Header="Status">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Path=Status}">
                            </TextBlock>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
            </GridView>
        </ListView.View>
    </ListView>
</Grid>

and the function getting the service List:

public static ObservableCollection<NotifiableServiceController> GetServices()
        {
            ObservableCollection<NotifiableServiceController> oaServices = new ObservableCollection<NotifiableServiceController>();

            //Retrieving the services starting with "SQL"
            foreach (ServiceController sc in ServiceController.GetServices().Where(p => p.DisplayName.StartsWith("SQL")))
            {
                oaServices.Add(new NotifiableServiceController(sc));
            }

            return oaServices;
        }

The NotifiableServiceController is being updated at time interval to refresh the status of the associated Windows service. But only the first-time retrieved services (from GetServices() function) will be refreshed.

That is all fine till now. I just need to have only stopped processes displayed in the Listview and I think that can be done using Style or Triggers in XAML? if yes, how?

Thanks for your time.

Answer 1

The solution was to add a style to the ListView and targetting the ListViewItem as follow:

<ListView.Resources>
    <Style TargetType="ListViewItem">
        <Style.Triggers>
            <DataTrigger Binding="{Binding Status}" Value="Running">
                <Setter Property="ListBoxItem.Visibility" Value="Hidden" />
                <Setter Property="Height" Value="0" />
            </DataTrigger>
        </Style.Triggers>
    </Style>
</ListView.Resources>

Depending of the Service Status, I can take set the visibility and the Height of the ListViewItem