I am trying to build a very simple Contact browser. I have a Collection of Contact objects that displayed in a ListBox control which shows the FullName of the Contact and to the right I have a customControl called BasicContactCard. This is the XAML for the ContacWindow that displays the ListBox:
<DockPanel Width="auto" Height="auto" Margin="8 8 8 8">
<Border Height="56" HorizontalAlignment="Stretch" VerticalAlignment="Top" BorderThickness="1" CornerRadius="8" DockPanel.Dock="Top" Background="Beige">
<TextBox Height="32" Margin="23,5,135,5" Text="Search for contact here" FontStyle="Italic" Foreground="#FFAD9595" FontSize="14" BorderBrush="LightGray"/>
</Border>
<ListBox x:Name="contactList" DockPanel.Dock="Left" Width="192" Height="auto" Margin="5 4 0 8" />
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="1*" />
<RowDefinition Height="0.125*" />
</Grid.RowDefinitions>
<local:BasicContactCard Margin="8 8 8 8" />
<Button Grid.Row="1" x:Name="exit" Content="Exit" HorizontalAlignment="Right" Width="50" Height="25" Click="exit_Click" />
</Grid>
</DockPanel>
and this is the XAML for the CustomControl:
<DockPanel Width="auto " Height="auto" Margin="8,8,8,8">
<Grid Width="auto" Height="auto" DockPanel.Dock="Top">
<Grid.RowDefinitions>
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
</Grid.RowDefinitions>
<TextBlock x:Name="companyField" Grid.Row="0" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="Company"/>
<TextBlock x:Name="contactField" Grid.Row="1" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="Contact"/>
<TextBlock x:Name="phoneField" Grid.Row="2" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="Phone"/>
<TextBlock x:Name="emailField" Grid.Row="3" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="email"/>
</Grid>
</DockPanel>
The problem I have is how do I bind the individual elements of the CustomControl to the object behind the SelectedItem in the ListBox?
I think using a DataTemplate
for the ItemTemplates
of the ListBox
is the better choice. There is no need for using a CustomControl. The DataTemplate
defines the look of every item in your list.
You can use the SelectedItem property of the ListBox as your DataContext (is not a DataSource but is something "similar" if you will) for the user control.
Let's assume you have this object:
public class Contact
{
public string Name { get; set; }
public string LastName { get; set; }
public string Phone { get; set; }
public string Email { get; set; }
}
Then this your new XAML:
<DockPanel Width="auto" Height="auto" Margin="8 8 8 8">
<Border Height="56" HorizontalAlignment="Stretch" VerticalAlignment="Top" BorderThickness="1" CornerRadius="8" DockPanel.Dock="Top" Background="Beige">
<TextBox Height="32" Margin="23,5,135,5" Text="Search for contact here" FontStyle="Italic" Foreground="#FFAD9595" FontSize="14" BorderBrush="LightGray"/>
</Border>
<ListBox x:Name="contactList" DockPanel.Dock="Left" Width="192" Height="auto" Margin="5 4 0 8" />
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="1*" />
<RowDefinition Height="0.125*" />
</Grid.RowDefinitions>
<local:BasicContactCard Margin="8 8 8 8" />
<Button Grid.Row="1" x:Name="exit" Content="Exit" HorizontalAlignment="Right" Width="50" Height="25" Click="exit_Click" />
</Grid>
</DockPanel>
<DockPanel Width="auto " Height="auto" Margin="8,8,8,8" DataContext="{Binding ElementName='contactList', Path=SelectedItem}">
<Grid Width="auto" Height="auto" DockPanel.Dock="Top">
<Grid.RowDefinitions>
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
</Grid.RowDefinitions>
<TextBlock x:Name="companyField" Grid.Row="0" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="{Binding Company }"/>
<TextBlock x:Name="contactField" Grid.Row="1" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="{Binding Contact }"/>
<TextBlock x:Name="phoneField" Grid.Row="2" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="{Binding Phone }"/>
<TextBlock x:Name="emailField" Grid.Row="3" Width="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="8,8,8,8" Text="{Binding Email }"/>
</Grid>
</DockPanel>
The key part is this:
<DockPanel Width="auto " Height="auto" Margin="8,8,8,8" DataContext="{Binding ElementName='contactList', Path=SelectedItem}">
Of course, take a look how to obtain the values for the TextBlock:
Text="{Binding Company }"/>
There you are setting the DataContext of the DockPanel from the selected Item of the 'contactList' ListBox.
I did not test it, but I think you have an idea of you the two things relate. Good Luck.
Well I figured it out in the end and it was much simper than I thought! Doh!
Basically I set the DataContext for the Grid object in the ContactWindow to the ListBox so that any object inside that Grid would inherit the DataContext.
<DockPanel Width="auto" Height="auto" Margin="8 8 8 8">
<Border Height="56" HorizontalAlignment="Stretch" VerticalAlignment="Top" BorderThickness="1" CornerRadius="8" DockPanel.Dock="Top" Background="Beige">
<TextBox Height="32" Margin="23,5,135,5" Text="Search for contact here" FontStyle="Italic" Foreground="#FFAD9595" FontSize="14" BorderBrush="LightGray"/>
</Border>
<ListBox x:Name="contactList" DockPanel.Dock="Left" Width="192" Height="auto" Margin="5 4 0 8" ItemsSource="{Binding}" DisplayMemberPath="FullName" />
<Grid DataContext="{Binding ElementName=contactList, Path=SelectedItem}">
<Grid.RowDefinitions>
<RowDefinition Height="1*" />
<RowDefinition Height="0.125*" />
</Grid.RowDefinitions>
<local:BasicContactCard Margin="8 8 8 8" />
<Button Grid.Row="1" x:Name="exit" Content="Exit" HorizontalAlignment="Right" Width="50" Height="25" Click="exit_Click" />
</Grid>
</DockPanel>
Hopefully this might help someone else in the same boat as I was during their learning.
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