Is it possible to set a Filter for the OpenFileFialog, when you browse for a file?

Example *.pdf

When the binding mode is set to TwoWay on SelectedAppointment, you cannot edit an appointment with a Recurrence pattern after is has been created.

The ShowDialog event will not even fire. Is this intended behavior?

Regards,

2020.1.218.45

When implementing ScheduleViewDragDropBehavior, the behavior performs correctly, but the XAML designer indicates "CustomScheduleViewDragDropBehavior is not a valid value for property 'DragDropBehavior'."

Regrards,

Windows 10 Pro 64, Visual Studio 2019, Telerik.UI.for.Wpf.NetCore.Xaml 2020.1.218

I'm starting  up a new project and want to use RadWindow as my main window, so I found this explanation of what to do and followed it:

https://www.telerik.com/support/kb/wpf/window/details/how-to-use-radwindow-as-main-window

My problem is that the RadWindow seems to be ignoring the properties I put into the MainWindow.xaml, so it displays a main window just large enough to contain the title bar in the upper left corner of my desktop with "RadWindow" as the header.  I added code in the MainWindow's  constructor in the code-behind and that works.  What have I missed?

MainWindow.xaml:

MainWindow.xaml.cs:

Note: Code that sets window properties is coded out to show initial conditions that caused the problem.

app.xaml:

app.xaml.cs:

Bad Main Window.png shows the main window as it originally appeared when I was assigning the properties only in the xaml.  Good Main Window.png shows how the main window should appear, centered on my screen.  That's how it looks after I added the code to MainWindow's constructor to set the properties.

When activating tabs by clicking on the header, some tabs take a while to load because the contents are slow to load. This is not a problem.

However, when this happens, frequently the tab is dragged and torn off the radtabbedwindow, creating a new one.

Is there a way to stop tearing off tabs if the mouse has move less than 20 pixels for example?

I'v tried to follow a few of the how to do it but I do not get any data in my controller.

The code below is my latest attempt. If I create RadTreeViewItems in my ViewModel and then set them directly to the ItemsSource the treview is populated.

Can anyone see if I am missing something?

<UserControl.Resources>

        <viewmodels:FilterViewModel x:Key="FVM" />

        <DataTemplate x:Key="QualifierHDT"
                      DataType="{x:Type models:Qualifier}">
            <TextBlock Text="{Binding Name}" />
        </DataTemplate>
        
        <HierarchicalDataTemplate x:Key="ComponentHDT"
                                  DataType="{x:Type models:Component}"
                                  ItemsSource="{Binding Components}"
                                  ItemTemplate="{StaticResource QualifierHDT}">
            <TextBlock Text="{Binding Name}" />
        </HierarchicalDataTemplate>

        <HierarchicalDataTemplate x:Key="SystemCollectionHDT"
                                  DataType="{x:Type models:SystemCollection}"
                                  ItemsSource="{Binding SystemCollections}"
                                  ItemTemplate="{StaticResource ComponentHDT}">
            <TextBlock Text="{Binding Name}" />
        </HierarchicalDataTemplate>

        <HierarchicalDataTemplate x:Key="BuildingHDT"
                                  DataType="{x:Type models:Building}"
                                  ItemsSource="{Binding Buildings}"
                                  ItemTemplate="{StaticResource SystemCollectionHDT}">
            <TextBlock Text="{Binding Name}" />
        </HierarchicalDataTemplate>

        <HierarchicalDataTemplate x:Key="AreaHDT"
                                  DataType="{x:Type models:Area}"
                                  ItemsSource="{Binding Areas}"
                                  ItemTemplate="{StaticResource BuildingHDT}">
            <TextBlock Text="{Binding Name}" />
        </HierarchicalDataTemplate>


        <Style x:Key="ItemContainerStyle" TargetType="{x:Type telerik:RadTreeViewItem}">
            <Setter Property="IsSelected" Value="{Binding Path=Selected}"/>
            <Setter Property="IsExpanded" Value="{Binding Path=Expanded}"/>
        </Style>
    
        <helpers:FilterViewTemplateSelector x:Key="myDataTemplateSelector"
                                            AreaTemplate="{StaticResource AreaHDT}"
                                            BuildingTemplate="{StaticResource BuildingHDT}"
                                            SystemCollectionTemplate="{StaticResource SystemCollectionHDT}"
                                            ComponentTemplate="{StaticResource ComponentHDT}"
                                            QualifierTemplate="{StaticResource QualifierHDT}"/>
        
    </UserControl.Resources>

 <telerik:RadTreeView MinWidth="200px"
                             ItemsSource="{Binding Source={StaticResource FVM}}"
                             ItemTemplate="{StaticResource AreaHDT}"
                             ItemContainerStyle="{StaticResource ItemContainerStyle}"
                             ItemTemplateSelector="{StaticResource myDataTemplateSelector}">
        </telerik:RadTreeView>

Class structure

Class  Area

string Name;

ICollection<Building> buildings

Class Building

string Name:

ICollection<SystemCollection> SystemCollections

Class SystemCollection

string Name;

ICollection<Componennt> Components

Class Component

string Name;

ICollection<Qualifier> Qualifiers

Class Qualifier

String Name;

As the title suggest, my question is if it is possible to set the DateTimeWatermarkContent of the DateTimePicker control based on if the DatePicker is enabled or not. 

More specifically what I want to do is to remove the DateTimeWatermarkContent text when the control is disalbled.

How would I go about doing that?