Custom Axis Annotation

In some situations you may need to create custom axis annotation. The following scenarios can be useful for creating custom axis annotation:

When the ItemsSource property is a collection of numbers or DateTime values the chart uses these values as axis labels. The following code uses the ItemsSource property to create the custom Y-axis labels:

C#	Copy Code
c1Chart1.Reset(true); c1Chart1.Data.Children.Add( new DataSeries() { ValuesSource = new double[] { 1, 2, 1, 3, 1, 4 } }); c1Chart1.ChartType = ChartType.LineSymbols; c1Chart1.View.AxisY.ItemsSource = new double[] { 1.25, 1.5, 1.75, 4 };

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c1Chart1.Reset(true);
        c1Chart1.Data.Children.Add(
          new DataSeries() { ValuesSource = new double[] { 1, 2, 1, 3, 1, 4 } });
        c1Chart1.ChartType = ChartType.LineSymbols;
        c1Chart1.View.AxisY.ItemsSource = new double[] { 1.25, 1.5, 1.75, 4 };

Here is what the chart appears like after adding the preceding code:

C#	Copy Code
c1Chart1.Reset(true); c1Chart1.Data.Children.Add( new DataSeries() { ValuesSource = new double[] { 1, 2, 1, 3, 1, 4 } }); c1Chart1.ChartType = ChartType.LineSymbols; c1Chart1.View.AxisY.ItemsSource = new List<KeyValuePair<object,double>> { new KeyValuePair<object,double>("Min=1", 1), new KeyValuePair<object,double>("Average=2.5", 2.5), new KeyValuePair<object,double>("Max=4", 4)};

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c1Chart1.Reset(true);

        c1Chart1.Data.Children.Add(
          new DataSeries() { ValuesSource = new double[] { 1, 2, 1, 3, 1, 4 } });
        c1Chart1.ChartType = ChartType.LineSymbols;

        c1Chart1.View.AxisY.ItemsSource = new List<KeyValuePair<object,double>>
          { new KeyValuePair<object,double>("Min=1", 1),
            new KeyValuePair<object,double>("Average=2.5", 2.5),
            new KeyValuePair<object,double>("Max=4", 4)};

Here is what the chart appears like after adding the preceding code:

You can use the ItemsValueBinding and ItemsLabelBinding properties to create axis labels using arbitrary collection as data source, like in the following code:

C#	Copy Code
c1Chart1.Reset(true); Point[] pts = new Point[] { new Point(1, 1.3), new Point(2, 2.7), new Point(3, 3.9) }; c1Chart1.DataContext = pts; c1Chart1.ChartType = ChartType.LineSymbols; c1Chart1.View.AxisY.ItemsSource = pts; c1Chart1.View.AxisY.ItemsValueBinding = new Binding("Y"); c1Chart1.View.AxisY.ItemsLabelBinding = new Binding();

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c1Chart1.Reset(true);

        Point[] pts = new Point[] { new Point(1, 1.3), new Point(2, 2.7), new Point(3, 3.9) };
        c1Chart1.DataContext = pts;
        c1Chart1.ChartType = ChartType.LineSymbols;

        c1Chart1.View.AxisY.ItemsSource = pts;
        c1Chart1.View.AxisY.ItemsValueBinding = new Binding("Y");
        c1Chart1.View.AxisY.ItemsLabelBinding = new Binding();

Here is what the chart appears like after adding the preceding code: