Jon Jon - 17 days ago 5
ASP.NET (C#) Question

Button placed on listitem, how to access said listitem in button eventhandler?

I'm making a playlist management app in UWP and I need to be able to do a number of operations on items in the listviews I have set up. I've attached buttons to the listitems, but I don't know how to reference the "parent" listitem in the eventhandler of the button.

For instance:

page resource:

<DataTemplate x:DataType="data:JonPlaylist" x:Key="PlaylistDataTemplate">
<StackPanel>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Name:" Foreground="Azure" VerticalAlignment="Bottom" HorizontalAlignment="Left" FontStyle="Italic" Margin="0,0,10,0"/>
<Button Name="DeletePlayListButton" Content="Delete" Foreground="Azure" Background="SteelBlue" BorderBrush="Azure" Click="DeletePlayListButton_Click"/>
</StackPanel>
</StackPanel>
</DataTemplate>


listview:(althought it might not be relevant.)

<ListView Name="PlayListView" ItemsSource="{x:Bind Playlists}"
IsItemClickEnabled="True"
ItemClick="PlayListView_ItemClick"
ItemTemplate="{StaticResource PlaylistDataTemplate}"
Visibility="Collapsed"
Height="420"
ScrollViewer.VerticalScrollBarVisibility="Visible"/>


And the eventhandler for the deletebutton. This is where I'm stuck, I want to reference the listitem on which the button clicked was located.

private void DeletePlayListButton_Click(object sender, RoutedEventArgs e)
{
?????
}

Answer

So if you're looking to get the bound JonPlaylist, if you're not changing the DataContext in the DataTemplate (which it appears you're not), you can get that like this:

    private void DeletePlayListButton_Click(object sender, RoutedEventArgs e)
    {
        var button = sender as Button;
        if (button != null)
        {
            var boundItem = button.DataContext as JonPlaylist;
        }
    }