RadWindow as MainWindow ignores xaml properties

[Ken]

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:

<telerik:RadWindow x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    Header="Program Launcher" WindowStartupLocation="CenterScreen" Height="200" Width="400">
    <Grid>

    </Grid>
</telerik:RadWindow>

 

MainWindow.xaml.cs:

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Telerik.Windows.Controls;

namespace ProgramLauncher
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : RadWindow
    {
        public MainWindow()
        {
            //InitializeComponent();
            //    Header = "Program Launcher";
            //    WindowStartupLocation = WindowStartupLocation.CenterScreen;
            //    Height = 200;
            //    Width = 400;
        }
    }
}

 

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

app.xaml:

<Application x:Class="ProgramLauncher.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <!--xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"-->
    <!--StartupUri="MainWindow.xaml">-->
    <Application.Resources>
      <ResourceDictionary>
          <ResourceDictionary.MergedDictionaries>
          </ResourceDictionary.MergedDictionaries>
      </ResourceDictionary>
    </Application.Resources>
</Application>

 

app.xaml.cs:

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Windows;

namespace ProgramLauncher
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
        public App()
        {
           //this.InitializeComponent();
        }
        protected override void OnStartup(StartupEventArgs e)
        {
            new MainWindow().Show();
            base.OnStartup(e);
        }
    }
}

 

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.

[Ken]

Reinstalled Telerik UI for WPF and it's working now.

[Dinko | Tech Support Engineer]

Hi Ken,

I am happy to hear that you have found a solution to your scenario. If you have any other questions, you can open a new forum thread with your questions inside.

Regards,
Dinko
Progress Telerik