Received this question:

I need to bind some objects to an XML file – and refresh the binding whenever the XML source changes. By default my application (c# .exe) reads the source values romthe XML once at start-up, and doesn’t notice subsequent changes.

I didn't see an easy way to do this in Markup but with two lines of code you can call the refresh on the XMLDataProvider:

private void Button1click(object sender, RoutedEventArgs e)

{

XmlDataProvider DataProv = (XmlDataProvider)this.Window.FindResource("QuestionsDS");
DataProv.Refresh();
//this.LayoutRoot.DataContext = DataProv;

}

And the markup is:

<Window

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2006" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"

x:Class="UntitledProject18.Window1"

x:Name="Window"

Title="Window1"

Width="640" Height="480">

<Window.Resources>

<XmlDataProvider x:Name="Chuck" x:Key="QuestionsDS" d:IsDataSource="True" Source="C:\teched\XMLFile1.xml"/>

</Window.Resources>

<Grid x:Name="LayoutRoot">

<ListBox Margin="144,93,280,151" ItemsSource="{Binding Mode=Default, Source={StaticResource QuestionsDS}, XPath=/Questions/Question/@Wrong_answer2}"/>

<Button HorizontalAlignment="Left" Margin="88,23,0,0" VerticalAlignment="Top" Width="154" Height="57" Content="Button" x:Name="Button1" Click="Button1click"/>

</Grid>

</Window>