CustomLegendItem.MarkerImage Property

Specifies the custom legend item’s marker image.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v18.2.dll

Declaration

C#

[XtraChartsLocalizableCategory(XtraChartsCategory.Data)]
[XtraSerializableProperty(XtraSerializationVisibility.Content)]
[PersistenceMode(PersistenceMode.InnerProperty)]
public ChartImage MarkerImage { get; }

VB.NET

<XtraChartsLocalizableCategory(XtraChartsCategory.Data)>
<XtraSerializableProperty(XtraSerializationVisibility.Content)>
<PersistenceMode(PersistenceMode.InnerProperty)>
Public ReadOnly Property MarkerImage As ChartImage

Property Value

Type	Description
ChartImage	A ChartImage object specifying the image used as a legend item marker.

Example

This example demonstrates how to add a custom item to the legend.

• Create a CustomLegendItem object and add it to the Legend.CustomItems collection.
• Use the MarkerImage and Text properties to specify the custom item’s content.
• The Legend.ItemVisibilityMode property allows you to define whether to show custom items and auto-generated items together.

The following code adds a custom legend item with an image and text.

C#

private void Form1_Load(object sender, EventArgs e) {
    double total = CalculateTotal(chartControl.Series[0]);

    CustomLegendItem customLegendItem = new CustomLegendItem();
    customLegendItem.MarkerImage.Image = new Bitmap("..\\..\\Images\\sum-icon.png");
    customLegendItem.MarkerImageSizeMode = ChartImageSizeMode.Zoom;
    customLegendItem.Text = string.Format("Total: ${0}M", total);            
    chartControl.Legend.CustomItems.Add(customLegendItem);
    chartControl.Legend.ItemVisibilityMode = LegendItemVisibilityMode.AutoGeneratedAndCustom;
    chartControl.Legend.Direction = LegendDirection.TopToBottom;
}
public Double CalculateTotal (Series series) {
    double total = 0;
    foreach(SeriesPoint point in series.Points) {
        total += point.Values[0];
    }
    return total;
}

VB.NET

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
    Dim total As Double = CalculateTotal(chartControl.Series(0))
    Dim customLegendItem As CustomLegendItem = New CustomLegendItem
    customLegendItem.MarkerImage.Image = New Bitmap("..\..\Images\sum-icon.png")
    customLegendItem.MarkerImageSizeMode = ChartImageSizeMode.Zoom
    customLegendItem.Text = String.Format("Total: ${0}M", total)
    chartControl.Legend.CustomItems.Add(customLegendItem)
    chartControl.Legend.ItemVisibilityMode = LegendItemVisibilityMode.AutoGeneratedAndCustom
    chartControl.Legend.Direction = LegendDirection.TopToBottom
End Sub

Public Function CalculateTotal(ByVal series As Series) As Double
    Dim total As Double = 0
    For Each point As SeriesPoint In series.Points
        total = (total + point.Values(0))
    Next
    Return total
End Function