New Post: Launch ChildWindow when DataGrid row selected

Hi,

Here's an example. You define your ChildWindow into the WindowContainer and set its DataContext to the DataGrid.SelectedItem. You only need to open the ChildWindow when the Selection changes :

<Grid>
      <DataGrid x:Name="_dataGrid"
                ItemsSource="{Binding Players}"
                SelectedItem="{Binding SelectedPlayer}"
                SelectionChanged="DataGrid_SelectionChanged"/>

      <xctk:WindowContainer>
         <xctk:ChildWindow x:Name="_childWindow"
                           DataContext="{Binding SelectedItem, ElementName=_dataGrid}"
                           Caption="Player's details"
                           Left="75"
                           Top="150"
                           Width="275"
                           Height="125">
            <StackPanel>
               <StackPanel Orientation="Horizontal">
                  <TextBlock Text="FirstName:" />
                  <TextBlock Text="{Binding FirstName}"
                             Margin="10,0,0,0"/>
               </StackPanel>
               <StackPanel Orientation="Horizontal">
                  <TextBlock Text="LastName:" />
                  <TextBlock Text="{Binding LastName}"
                             Margin="10,0,0,0" />
               </StackPanel>
               <StackPanel Orientation="Horizontal">
                  <TextBlock Text="Number:" />
                  <TextBlock Text="{Binding Number}"
                             Margin="10,0,0,0" />
               </StackPanel>
            </StackPanel>
         </xctk:ChildWindow>
      </xctk:WindowContainer>
   </Grid>

 public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();

      _dataGrid.DataContext = this;
      this.Players = new List<Player>()
      {
        new Player() { FirstName = "PK", LastName = "Subban", Number = 76 },
        new Player() { FirstName = "Carey", LastName = "Price", Number = 31 },
        new Player() { FirstName = "Max", LastName = "Pacioretty", Number = 67 },
        new Player() { FirstName = "Alex", LastName = "Galchenyuk", Number = 27 },
      };
      this.SelectedPlayer = this.Players[ 1 ];
    }

    public Player SelectedPlayer
    {
      get;
      set;
    }

    public List<Player> Players
    {
      get;
      set;
    }

    private void DataGrid_SelectionChanged( object sender, SelectionChangedEventArgs e )
    {
      _childWindow.WindowState = Xceed.Wpf.Toolkit.WindowState.Open;
    }
  }

  public class Player
  {
    public string FirstName
    {
      get;
      set;
    }
    public string LastName
    {
      get;
      set;
    }
    public int Number
    {
      get;
      set;
    }
  }