Perhaps you can assign the same instance of data collection object to two different windows' DataContext.
Example: (ListView data will be updated after changed data in the main window datagrid)
<Window x:Class="BindingToMultipleWindows.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Name="mainWin"
Title="MainWindow" Height="350" Width="525">
<StackPanel>
<ListView ItemsSource="{Binding}">
<ListView.View>
<GridView>
<GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}"/>
<GridViewColumn Header="Age" DisplayMemberBinding="{Binding Age}"/>
</GridView>
</ListView.View>
</ListView>
<DataGrid ItemsSource="{Binding}"/>
<Button Content="Launch second window" Click="Button_Click"/>
</StackPanel>
</Window>
using System.Collections.ObjectModel;
using System.Windows;
namespace BindingToMultipleWindows
{
public partial class MainWindow : Window
{
ObservableCollection<Person> people = new ObservableCollection<Person>
{
new Person {Name = "Tom", Age = 10},
new Person {Name = "Dick", Age = 20},
new Person {Name = "Harry", Age = 30},
};
public MainWindow()
{
InitializeComponent();
DataContext = people;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
new Window1() { DataContext = people }.Show();
}
}
public class Person
{
public string Name { set; get; }
public int Age { set; get; }
}
}
<Window x:Class="BindingToMultipleWindows.Window1"
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>
<ListView ItemsSource="{Binding}">
<ListView.View>
<GridView>
<GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}"/>
<GridViewColumn Header="Age" DisplayMemberBinding="{Binding Age}"/>
</GridView>
</ListView.View>
</ListView>
</StackPanel>
</Window>
William
