LegendBase.ItemVisibilityMode Property

Specifies how to display custom and automatically generated items in a legend.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v23.2.dll

NuGet Package: DevExpress.Charts

Declaration

C#

[XtraChartsLocalizableCategory(XtraChartsCategory.Elements)]
public LegendItemVisibilityMode ItemVisibilityMode { get; set; }

VB.NET

<XtraChartsLocalizableCategory(XtraChartsCategory.Elements)>
Public Property ItemVisibilityMode As LegendItemVisibilityMode

Property Value

Type	Description
LegendItemVisibilityMode	A LegendItemVisibilityMode enumeration value that specifies the legend’s visibility mode.

Available values:

Name	Description
Default	If a legend has custom items, then automatically generated items are not displayed.
AutoGeneratedAndCustom	The legend displays custom and automatically generated items together.

Example

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

View Example

Create a CustomLegendItem object and add it to the CustomItems collection. Use the following properties to configure the custom item:

CustomLegendItem.MarkerImage

Returns the custom legend item’s marker image.

CustomLegendItem.Text

Gets or sets the text the custom legend item displays.

To show custom and automatically generated legend items, set the LegendBase.ItemVisibilityMode to AutoGeneratedAndCustom.

Form1.cs

using DevExpress.Drawing;
using DevExpress.XtraCharts;
using System;
using System.IO;
using System.Windows.Forms;

namespace CustomLegendItemSample {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e) {
            #region #CustomLegendItems
            // Create a new custom item.
            CustomLegendItem item = new CustomLegendItem();
            chart.Legend.CustomItems.Add(item);
            // Specify its text and marker.
            item.Text = "Custom Legend Item";
            FileStream outfile = new FileStream("Image\\DXLogo_16x16.png", FileMode.Open);
            DXImage image = DXImage.FromStream(outfile);
            item.MarkerImage.DXImage = image;

            // Set a value indicating that both autogenerated and custom items are displayed.
            chart.Legend.ItemVisibilityMode = LegendItemVisibilityMode.AutoGeneratedAndCustom;
            #endregion #CustomLegendItems
        }
    }
}

Form1.vb

Imports DevExpress.Drawing
Imports DevExpress.XtraCharts
Imports System
Imports System.IO
Imports System.Windows.Forms

Namespace CustomLegendItemSample

    Public Partial Class Form1
        Inherits Form

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
#Region "#CustomLegendItems"
            ' Create a new custom item.
            Dim item As CustomLegendItem = New CustomLegendItem()
            chart.Legend.CustomItems.Add(item)
            ' Specify its text and marker.
            item.Text = "Custom Legend Item"
            Dim outfile As FileStream = New FileStream("Image\DXLogo_16x16.png", FileMode.Open)
            Dim image As DXImage = DXImage.FromStream(outfile)
            item.MarkerImage.DXImage = image
            ' Set a value indicating that both autogenerated and custom items are displayed.
            chart.Legend.ItemVisibilityMode = LegendItemVisibilityMode.AutoGeneratedAndCustom
#End Region  ' #CustomLegendItems
        End Sub
    End Class
End Namespace

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the ItemVisibilityMode property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

winforms-chart-add-a-custom-legend-item/CS/CustomLegendItemSample/Form1.cs#L24

// Set a value indicating that both autogenerated and custom items are displayed.
chart.Legend.ItemVisibilityMode = LegendItemVisibilityMode.AutoGeneratedAndCustom;
#endregion #CustomLegendItems

VB.NET

winforms-chart-add-a-custom-legend-item/VB/CustomLegendItemSample/Form1.vb#L27

            ' Set a value indicating that both autogenerated and custom items are displayed.
            chart.Legend.ItemVisibilityMode = LegendItemVisibilityMode.AutoGeneratedAndCustom
#End Region  ' #CustomLegendItems