Creating an Annotation Template

To create a custom annotation using the AnnoTemplate property, use the following XAML markup or C# code:

XAML	Copy Code
<c1chart:ChartView.AxisX> <c1chart:Axis> <c1chart:Axis.Resources > <local:ColorConverter x:Key="clrcnv" /> </c1chart:Axis.Resources> <c1chart:Axis.AnnoTemplate> <DataTemplate> <TextBlock Width="25" TextAlignment="Center" Text="{Binding Path=Value}" Foreground="{Binding Converter={StaticResource clrcnv}}"/> </DataTemplate> </c1chart:Axis.AnnoTemplate> </c1chart:Axis> </c1chart:ChartView.AxisX>

XAML

Copy Code

<c1chart:ChartView.AxisX>
      <c1chart:Axis>
        <c1chart:Axis.Resources >
          <local:ColorConverter x:Key="clrcnv" />
        </c1chart:Axis.Resources>
        <c1chart:Axis.AnnoTemplate>
          <DataTemplate>
            <TextBlock Width="25" TextAlignment="Center"
             Text="{Binding Path=Value}"
             Foreground="{Binding Converter={StaticResource clrcnv}}"/>
          </DataTemplate>
        </c1chart:Axis.AnnoTemplate>
      </c1chart:Axis>
    </c1chart:ChartView.AxisX>

C#	Copy Code
public class ColorConverter : IValueConverter { int cnt = 0; public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { //DataPoint dpt = (DataPoint)value; // alternate the brushes return cnt++ % 2 == 0 ? Brushes.Blue : Brushes.Red; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { return null; } }

Copy Code

public class ColorConverter : IValueConverter {
   int cnt = 0;
   public object Convert(object value, Type targetType,
     object parameter, CultureInfo culture)
   {
     //DataPoint dpt = (DataPoint)value;
     // alternate the brushes
     return cnt++ % 2 == 0 ? Brushes.Blue : Brushes.Red;
   }

   public object ConvertBack(object value, Type targetType,
    object parameter, CultureInfo culture)
   {
     return null;
   }
}