Hello,

I'd like to use a DesktopAlert in a WPF MVVM app.

I copy the code from the Telerik WPF app - DesktopAlert Examples - First Look app (email example).

Code:

public class AlertViewModel : BaseViewModel
{
private RadDesktopAlertManager desktopAlertManager;

public AlertViewModel()
{
this.desktopAlertManager = new RadDesktopAlertManager(AlertScreenPosition.BottomRight, 5d);
}

public Action ActivateMainWindowAction { get; set; }
private void OnAlertCommandExecuted(object param)
{            
if (this.ActivateMainWindowAction != null)
{
this.ActivateMainWindowAction.Invoke();
}            
}

public void TestAlert()
{
BitmapImage b = new BitmapImage();
b.BeginInit();
b.UriSource = new Uri("C:\\...\\error.png");
b.EndInit();

this.desktopAlertManager.ShowAlert(new DesktopAlertParameters
{
Header = "Header",
Content = "Content",
Icon = new Image { Source = b, Width = 48, Height = 48 },
IconColumnWidth = 48,
IconMargin = new Thickness(10, 0, 20, 0),
Command = new DelegateCommand(this.OnAlertCommandExecuted),
CommandParameter = "ABC"
});
}
}

public partial class Alert : UserControl
{
public Alert()
{
InitializeComponent();
AlertViewModel vm = ServiceLocator.Current.GetInstance<AlertViewModel>();
vm.ActivateMainWindowAction = new Action(this.ActivateMainWindow);
DataContext = vm;
}

private void ActivateMainWindow()
{
var mainWindow = Application.Current.MainWindow;

if (mainWindow != null)
{
if (mainWindow.WindowState == WindowState.Minimized)
{
mainWindow.WindowState = WindowState.Normal;
}

if (!mainWindow.IsActive)
{
mainWindow.Activate();
}
}
}
}

The DesktopAlertParameters command never execute and the alert never show.

Is there something i miss? If i try desktop alert on a new classic WPF app (no mvvm) works withuot problems.

Thanks.

Hi,

Any update on removing the white space from the menu if we are using less then 8 items?
Because it is looking very bad on the UI section.

Our clients want to remove the white space. So any option to do it?

Waiting for your quick reply.

When I view the RadGridView, I can hide columns using the IsVissible=false method.  This appears to be ignored when printing.  Is this true and if so, is there another way that I can dynamically cause columns to not be printed?

If all the columns show, it bleeds to a second page and if I force all columns to print on a single page, the font is simply too small to read.

Thanks.

I'm trying to add a tooltiptemplate for the series in my RadCartesianChart. I can't get this to work but I don't see any problem with it.

XAML:

<telerik:ScatterLineSeries x:Key="ToolTipDisplay2">
<telerik:ScatterLineSeries.PointTemplate>
<DataTemplate>
<Ellipse Width="2" Height="2" Fill="Black" />
</DataTemplate>
</telerik:ScatterLineSeries.PointTemplate>
</telerik:ScatterLineSeries>

C# code:

... series added...

ScatterLineSeries temp1 = (ScatterLineSeries) this.Resources["ToolTipDisplay2"];
survivalChart.Series[survivalChart.Series.Count() - 1].TooltipTemplate = (DataTemplate) temp1.TooltipTemplate;

Hi Guys,

I'm struggling with an issue and I can't figure why this goes wrong.

I cannot access my object in the resourcedictionary in my code behind.  What I have is the following
I have a resourcedictionary like this.

this whitin this resourcedictionary
I have a radgridview like this.

now I'm trying the access the gridViewAdminData by name in the code behind.

but it won't work at all.
I have this in my code

but gridViewAdminData won't get recognized. Also enabling the line above gives back a null value.

Does anyone have any idea about how to access this object in the code behind?

thank you

Hello,

I have a VisualizationLayer bound to a collection of objects. I've defined a MapEllipseView for (some of) the objects in the collection via an ItemTemplateSelector.
The issue I have is that when I add items to the collection the ellipses are only rendered on the map at the completion of a zoom animation.

How can I get them to appear straight away after they are added in the collection?

Thanks,
Chris

I am trying to bind a few ContextMenu items to the selected appointment's properties, however I can't seem to get to the DataContext of the scheduleview.

<telerik:RadMenuItem Header="Requires Nurse..." IsChecked="{Binding Menu.UIElement.SelectedAppointment.Require_Nurse}" />

I've tried RelativeSource up to the ScheduleGrid, or direct to UIElement and everything gives me the same binding expression error that Schedule_VM doesn't contain a property for Require_Nurse.

Is there any way to bind a context menu item to the appointment?  Even if I get it bound will it actually allow modifying of the property?

Hello,

I'm working on a WPF application using Prism 5 and Telerik UI for WPF R3 2016. The application loads dinamically 2 separate modules (dll) using UnityContainer and inject them in a RadDocking control as follows:

MainWindow.xaml

<Window.Resources>
        <Style TargetType="telerik:RadDocumentPane">
            <Setter Property="Header" Value="{Binding DataContext.Title}"/>
            <Setter Property="HeaderTemplate">
                <Setter.Value>
                    <DataTemplate>
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition />
                                <ColumnDefinition />
                            </Grid.ColumnDefinitions>
                            <ContentControl VerticalAlignment="Center" HorizontalAlignment="Center"
                                            Margin="0,0,7,0" Content="{Binding}"/>
                            <Button Grid.Column="1" Content="x">
                                <i:Interaction.Triggers>
                                    <i:EventTrigger EventName="Click">
                                        <prism:CloseTabAction/>
                                    </i:EventTrigger>
                                </i:Interaction.Triggers>
                            </Button>

                        </Grid>
                    </DataTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <StackPanel Orientation="Horizontal">
            <Button Content="Toolbar" Command="{Binding ShowToolbarCommand}" Width="50" Height="25" HorizontalAlignment="Left"></Button>
            <Button Content="Home" Command="{Binding ShowHomeCommand}" Width="50" Height="25" HorizontalAlignment="Left"></Button>
        </StackPanel>
        <DockPanel Grid.Row="1" LastChildFill="True">
            <telerikDocking:RadDocking x:Name="Docking" Background="Transparent"
                                      BorderThickness="0">
                <telerikDocking:RadDocking.DocumentHost>
                    <telerikDocking:RadSplitContainer >
                        <telerikDocking:RadPaneGroup regions:RegionManager.RegionName="{x:Static model:RegionNames.ContentRegion}"/>
                    </telerikDocking:RadSplitContainer>
                </telerikDocking:RadDocking.DocumentHost>
                <telerikDocking:RadSplitContainer MaxWidth="400" Width="175" MinWidth="175" InitialPosition="DockedLeft">
                    <telerikDocking:RadPaneGroup>
                        <telerikDocking:RadDocumentPane CanUserClose="False" PaneHeaderVisibility="Collapsed"
                                regions:RegionManager.RegionName="{x:Static model:RegionNames.LeftRegion}">
                        </telerikDocking:RadDocumentPane>
                    </telerikDocking:RadPaneGroup>
                </telerikDocking:RadSplitContainer>
            </telerikDocking:RadDocking>
        </DockPanel>
    </Grid>

CloseTabAction.cs

public class CloseTabAction : TriggerAction<Button>
    {
        protected override void Invoke(object parameter)
        {
            var args = parameter as RoutedEventArgs;
            if (args == null)
                return;
            var tabItem = FindParent<RadPane>(args.OriginalSource as DependencyObject);
            if (tabItem == null)
                return;
            var tabControl = FindParent<RadPaneGroup>(tabItem);
            if (tabControl == null)
                return;

            IRegion region = RegionManager.GetObservableRegion(tabControl).Value;
            if (region == null)
                return;
            RemoveItemFromRegion(tabItem.Content, region);
        }

        void RemoveItemFromRegion(object item, IRegion region)
        {
            var navigationContext = new NavigationContext(region.NavigationService, null);
            if (CanRemove(item, navigationContext))
            {
                InvokeOnNavigatedFrom(item, navigationContext);
                region.Remove(item);
            }
        }

        void InvokeOnNavigatedFrom(object item, NavigationContext navigationContext)
        {
            var navigationAwareItem = item as INavigationAware;
            if (navigationAwareItem != null)
                navigationAwareItem.OnNavigatedFrom(navigationContext);
            var frameworkElement = item as FrameworkElement;
            if (frameworkElement != null)
            {
                INavigationAware navigationAwareDataContext = frameworkElement.DataContext as INavigationAware;
                if (navigationAwareDataContext != null)
                {
                    navigationAwareDataContext.OnNavigatedFrom(navigationContext);
                }
            }
        }

        bool CanRemove(object item, NavigationContext navigationContext)
        {
            bool canRemove = true;
            var confirmRequestItem = item as IConfirmNavigationRequest;
            if (confirmRequestItem != null)
            {
                confirmRequestItem.ConfirmNavigationRequest(navigationContext, result =>
                {
                    canRemove = result;
                });
            }
            var frameworkElement = item as FrameworkElement;
            if (frameworkElement != null && canRemove)
            {
                IConfirmNavigationRequest confirmRequestDataContext = frameworkElement.DataContext as IConfirmNavigationRequest;
                if (confirmRequestDataContext != null)
                {
                    confirmRequestDataContext.ConfirmNavigationRequest(navigationContext, result =>
                    {
                        canRemove = result;
                    });
                }
            }
            return canRemove;
        }

        static T FindParent<T>(DependencyObject child) where T : DependencyObject
        {
            DependencyObject parentObject = VisualTreeHelper.GetParent(child);
            if (parentObject == null)
                return null;
            var parent = parentObject as T;
            if (parent != null)
                return parent;
            return FindParent<T>(parentObject);
        }
    }

I've overrided Prism ScopedRegionNavigationContentLoader in order to allow views injections using navigation to create ScopedRegions:

public class ScopedRegionNavigationContentLoader: IRegionNavigationContentLoader
    {
        private readonly IServiceLocator serviceLocator;

        /// <summary>
        /// Initializes a new instance of the <see cref="RegionNavigationContentLoader"/> class with a service locator.
        /// </summary>
        /// <param name="serviceLocator">The service locator.</param>
        public ScopedRegionNavigationContentLoader(IServiceLocator serviceLocator)
        {
            this.serviceLocator = serviceLocator;
        }

        /// <summary>
        /// Gets the view to which the navigation request represented by <paramref name="navigationContext"/> applies.
        /// </summary>
        /// <param name="region">The region.</param>
        /// <param name="navigationContext">The context representing the navigation request.</param>
        /// <returns>
        /// The view to be the target of the navigation request.
        /// </returns>
        /// <remarks>
        /// If none of the views in the region can be the target of the navigation request, a new view
        /// is created and added to the region.
        /// </remarks>
        /// <exception cref="ArgumentException">when a new view cannot be created for the navigation request.</exception>
        public object LoadContent(IRegion region, NavigationContext navigationContext)
        {
            if (region == null) throw new ArgumentNullException("region");
            if (navigationContext == null) throw new ArgumentNullException("navigationContext");

            string candidateTargetContract = this.GetContractFromNavigationContext(navigationContext);

            var candidates = this.GetCandidatesFromRegion(region, candidateTargetContract);

            var acceptingCandidates =
                candidates.Where(
                    v =>
                    {
                        var navigationAware = v as INavigationAware;
                        if (navigationAware != null && !navigationAware.IsNavigationTarget(navigationContext))
                        {
                            return false;
                        }

                        var frameworkElement = v as FrameworkElement;
                        if (frameworkElement == null)
                        {
                            return true;
                        }

                        navigationAware = frameworkElement.DataContext as INavigationAware;
                        return navigationAware == null || navigationAware.IsNavigationTarget(navigationContext);
                    });


            var view = acceptingCandidates.FirstOrDefault();

            if (view != null)
            {
                return view;
            }

            view = this.CreateNewRegionItem(candidateTargetContract);

            region.Add(view, null, CreateRegionManagerScope(view));

            return view;
        }

        private bool CreateRegionManagerScope(object view)
        {
            bool createRegionManagerScope = false;

            var viewHasScopedRegions = view as ICreateRegionManagerScope;
            if (viewHasScopedRegions != null)
                createRegionManagerScope = viewHasScopedRegions.CreateRegionManagerScope;

            return createRegionManagerScope;
        }

        /// <summary>
        /// Provides a new item for the region based on the supplied candidate target contract name.
        /// </summary>
        /// <param name="candidateTargetContract">The target contract to build.</param>
        /// <returns>An instance of an item to put into the <see cref="IRegion"/>.</returns>
        protected virtual object CreateNewRegionItem(string candidateTargetContract)
        {
            object newRegionItem;
            try
            {           
                newRegionItem = this.serviceLocator.GetInstance<object>(candidateTargetContract);
            }
            catch (ActivationException e)
            {
                throw new InvalidOperationException(
                    string.Format(CultureInfo.CurrentCulture, "Cannot create navigation target", candidateTargetContract),
                    e);
            }
            return newRegionItem;
        }

        /// <summary>
        /// Returns the candidate TargetContract based on the <see cref="NavigationContext"/>.
        /// </summary>
        /// <param name="navigationContext">The navigation contract.</param>
        /// <returns>The candidate contract to seek within the <see cref="IRegion"/> and to use, if not found, when resolving from the container.</returns>
        protected virtual string GetContractFromNavigationContext(NavigationContext navigationContext)
        {
            if (navigationContext == null) throw new ArgumentNullException("navigationContext");

            var candidateTargetContract = UriParsingHelper.GetAbsolutePath(navigationContext.Uri);
            candidateTargetContract = candidateTargetContract.TrimStart('/');
            return candidateTargetContract;
        }

        /// <summary>
        /// Returns the set of candidates that may satisfiy this navigation request.
        /// </summary>
        /// <param name="region">The region containing items that may satisfy the navigation request.</param>
        /// <param name="candidateNavigationContract">The candidate navigation target as determined by <see cref="GetContractFromNavigationContext"/></param>
        /// <returns>An enumerable of candidate objects from the <see cref="IRegion"/></returns>
        protected virtual IEnumerable<object> GetCandidatesFromRegion(IRegion region, string candidateNavigationContract)
        {
            if (region == null) throw new ArgumentNullException("region");
            return region.Views.Where(v =>
                string.Equals(v.GetType().Name, candidateNavigationContract, StringComparison.Ordinal) ||
                string.Equals(v.GetType().FullName, candidateNavigationContract, StringComparison.Ordinal));
        }
    }

Everything works fine for creation / add RadPanes except Closing and Moving event.

On Close, the the exception is: An unhandled exception of type 'System.InvalidCastException' occurred in Telerik.Windows.Controls.Docking.dll

Additional information: Unable to cast object of type 'ModuleA.Views.ModuleAHomeView' to type 'Telerik.Windows.Controls.RadPane'.

but hostControl is a valid RadPaneGroup and Items collection DO contain ModuleA.Views.ModuleAHomeView

On Move,  I've got a NullReferenceExceltopn at Telerik.Windows.Controls.RadPane.OnHeaderMouseLeftButtonDown(Object sender, MouseButtonEventArgs e)

Any help would be highly appreciated.

Best regards,

Alin Halatiu