I have a ComboBox with ItemsSource="{DynamicResource testResource}". The testResource is the Application resource that I set in C# code.
What I have noticed is that if I load Window befor Application created, the resource is not loaded by ComboBox:
Window window = (Window)LoadXaml("Window1.xaml");
Application app = new Application();
This code works
Application app = new Application();
Window window = (Window)LoadXaml("Window1.xaml");
Also, even if I created the window befor the application, I can load resource latter in button click handler.
Can some one explain, what happens? Why the order matters?
Window1.xaml:
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">
<StackPanel>
<ComboBox ItemsSource="{DynamicResource testResource}" SelectedIndex="0"></ComboBox>
<Button x:Name='testButton'>Test</Button>
</StackPanel>
</Window>
C#
class Program
{
[STAThread]
public static void Main()
{
Window window = (Window)LoadXaml("Window1.xaml");
Application app = new Application();
SetupResource();
(window.FindName("testButton") as Button).Click += new RoutedEventHandler(testButton_Click);
window.Show();
app.Run(window);
}
static void testButton_Click(object sender, RoutedEventArgs e)
{
SetupResource();
}
static void SetupResource()
{
List<string> list = new List<string>();
list.Add("Hola");
list.Add("Mundo");
Application.Current.Resources["testResource"] = list;
}
static object LoadXaml(string fileName)
{
return XamlReader.Load(File.Open(fileName, FileMode.Open));
}
}