WPF - referencing a class member in an event

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I have a collection of classes that hold images and the paths of those images:

C#

public ObservableCollection<Item> PictureList { get; set; }

public class Item
{

public ImageSource picture { get; set; }
public string fullName { get; set; }

}

I am using a listbox to display the images.

<ListBox Height="Auto"
            Width="200"
                 Margin="0"
                 ItemsSource="{Binding PictureList}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel>

                    <Image Source="{Binding picture}"
                           Height="100"
                           Width="100"
                           MouseUp="Picture_Click"/>

                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

What I would like to be able to do is reference the fullName property in the Picture_Click event, however as the image is bound to picture I cannot figure out how to access the fullName property.

I have googled but had not luck in working this out.

Any help on this much appreciated.

Posted 12-Oct-13 7:21am

GuyThiebaut

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Matt T Heffron · Accepted Answer · 2013-10-16T06:53:00

Solution 3

You don't need the Button, just reference the DataContext of the Image similar to what you did:

C#

private void Picture_Click(object sender, RoutedEventArgs e)
{
  MessageBox.Show(((Item)(((Image)sender).DataContext)).fullName);
}

Ought to work.

Posted 16-Oct-13 6:53am

Matt T Heffron

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GuyThiebaut 16-Oct-13 16:38pm

Thanks Matt,

That does work - my code above was testing code so hopefully I can use what you have shown in the changes I have made.

GuyThiebaut · Accepted Answer · 2013-10-12T08:09:00

I fixed it by wrapping the image inside a button:

HTML

<listbox height="Auto">
            Width="200"
                 Margin="0"
                 ItemsSource="{Binding PictureList}">
        <listbox.itemtemplate>
            <datatemplate>
                <stackpanel>

                    <button background="Transparent">
                            Click="Button_Click">
                        <image source="{Binding picture}">
                                   Height="100"
                                   Width="100"/>
                    </image></button>

                </stackpanel>
            </datatemplate>
        </listbox.itemtemplate>
    </listbox>

WIthin the Button_Click method I then reference the fullName property.

C#

private void Button_Click(object sender, RoutedEventArgs e)
      {

          MessageBox.Show(((Item)(((Button)sender).DataContext)).fullName);

      }

It's not pretty so anyone with a more elegant solution please post it here - thanks.