ListView/ GridView Selection quesiton

Question

I have a simple WPF ListView that is bound to a Dataset.  The ListView defines a number of columns using the following format:

<Listview>

  <ListView.View>

    <GridView>

      <GridView.CellTemplate>

        <DataTemplate>

        </DataTemplate>

      <GridView.CellTemplate>

    </GridView>

  </ListView.View>

</Listview>

There are multiple columns.  My question is simple, If I have a button or textbox in one of the columns, and I click on on the column/row, how do I get the DataRow that is selected?  The RoutedEventArgs (in the case of clicking on a button) doesn't seem to provide that information.  If I set the IsSynchronizedWithCurrentItem Property of the View.CurrentPosition doesn't seem to report the DataRow Index of the Gridvew row index.

Thanks.

Answer 1

You actually have to pull it from the DataContext of the Button that was clicked since the Button is a child of the row and the row's DataContext is the item in question. You can do something like this

XAML

<ListView x:Name="listView">
  <ListView.View>
    <GridView>
      <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}"></GridViewColumn>
      <GridViewColumn>
        <GridViewColumn.CellTemplate>
          <DataTemplate>
            <Button Click="Button_Click">Click Me</Button>
          </DataTemplate>
        </GridViewColumn.CellTemplate>
      </GridViewColumn>
    </GridView>
  </ListView.View>
</ListView>

CODE

public partial class Window1 : Window
{
  public Window1()
  {
    InitializeComponent();

    listView.ItemsSource = new List<DataClass>() 
    { 
      new DataClass() { Name = "Robotuner"},
      new DataClass() { Name = "MSearles"},
    };
  }

  private void Button_Click(object sender, RoutedEventArgs e)
  {
    Button button = sender as Button;
    DataClass dataClass = button.DataContext as DataClass;

    Console.WriteLine(dataClass.Name);
  }
}

class DataClass
{
  public string Name { get; set; }
}

Or if you're using commands, use CommandParameter="{Binding }".

 

Warm regards,

Matt

Answer 2

Hi Robotuner,

You can create a CollectionViewSource to simplify this work:

    CollectionViewSource _viewSource = new CollectionViewSource();
    public Window1()
    {
      InitializeComponent(); 
      _viewSource.Source = new List<DataClass>();
      listView1.ItemsSource = _viewSource.View;
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
      var item = _viewSource.View.CurrentItem;
      var index = _viewSource.View.CurrentPosition;
    }

Let me know if this does not help.
Aland Li

---

Please mark the replies as answers if they help and unmark if they don't. This can be beneficial to other community members reading the thread.