Assigning an event or command to a DataTemplate in ResourceDictionary
- by Scott
I have the following class:
public class Day
{
public int Date { get; set; }
public String DayName { get; set; }
public Day()
{
}
public Day(int date, string dayName)
{
Date = date;
DayName = dayName;
CommandManager.RegisterClassCommandBinding(typeof(Day), new CommandBinding(DayClick, new ExecutedRoutedEventHandler(OnExecutedDayClick),
new CanExecuteRoutedEventHandler(OnCanExecuteDayClick)));
}
public static readonly RoutedCommand DayClick = new RoutedCommand("DayClick", typeof(Day));
private static void OnCanExecuteDayClick(object sender, CanExecuteRoutedEventArgs e)
{
((Day)sender).OnCanExecuteDayClick(e);
}
private static void OnExecutedDayClick(object sender, ExecutedRoutedEventArgs e)
{
((Day)sender).OnExecutedDayClick(e);
}
protected virtual void OnCanExecuteDayClick(CanExecuteRoutedEventArgs e)
{
e.CanExecute = true;
e.Handled = false;
}
protected virtual void OnExecutedDayClick(ExecutedRoutedEventArgs e)
{
string content = String.Format("Day {0}, which is {1}, was clicked.", Date.ToString(), DayName);
MessageBox.Show(content);
e.Handled = true;
}
}
I am using the following DataTemplate (that is in a ResourceDictionary) to render it:
<DataTemplate DataType="{x:Type local:Day}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Rectangle Grid.ColumnSpan="2" x:Name="rectHasEntry" Fill="WhiteSmoke"/>
<TextBlock Grid.Column="0" x:Name="textBlockDayName" Text="{Binding DayName}"
FontFamily="Junction" FontSize="11" Background="Transparent" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,2,0,0"/>
<TextBlock Grid.Column="1" x:Name="textBlockDate" Text="{Binding Date}"
FontFamily="Junction" FontSize="11" Background="Transparent" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,2,0,0"/>
<Rectangle Grid.ColumnSpan="2" x:Name="rectMouseOver" Fill="#A2C0DA" Opacity="0"
Style="{StaticResource DayRectangleMouseOverStyle}">
</Rectangle>
</Grid>
</DataTemplate>
No problems so far, I can get it on screen.
What I want to be able to do is assign a Command, or use an event, so that when the user clicks on the Day it will notify the parent of the Day object that it has been clicked.
I've tried the following:
<Rectangle.CommandBindings>
<CommandBinding Command="{x:Static local:Day.NextDay}"
Executed="{x:Static local:Day.OnExecutedDayClick}"
CanExecute="{x:Static local:Day.OnCanExecuteDayClick}"/>
</Rectangle.CommandBindings>
to try and bind the commands that are in the Day class but it didn't work. I got an error stating:
'ResourceDictionary' root element requires a x:Class attribute to support event handlers in the XAML file. Either remove the event handler for the Executed event, or add a x:Class attribute to the root element.
Which I think means that there is no code-behind file for a ResourceDictionary, or something to that effect.
In any event, I'm not sure if I should be using Commands here, or somehow tying events to the Rectangle in question, or if this is even possible. I've seen various places where it sure looks like it's possible, I'm just unable to translate what I'm seeing into something that actually works, hence this post.
Thanks in advance.
