AreaSparklineView.AreaOpacity Property

Specifies the opacity (0-255) of the area sparkline.

Namespace: DevExpress.Sparkline

Assembly: DevExpress.Sparkline.v19.2.Core.dll

Declaration

C#

public byte AreaOpacity { get; set; }

VB.NET

Public Property AreaOpacity As Byte

Property Value

Type	Description
Byte	A Byte value from 0 (transparent) to 255 (opaque).

Example

This example demonstrates how to create a sparkline control, fill it with data, choose the way to represent this data, and customize the sparkline appearance.

To do this, you should create a SparklineEdit object and assign the datasource object to its BaseEdit.EditValue property. Then, you need to set the appropriate view instance to the SparklineEdit.Properties.View property and customize view properties to meet your requirements.

Note that in this sample, the AreaSparklineView class is used to display area sparklines. To display other sparklines types, use the BarSparklineView, LineSparklineView or WinLossSparklineView classes instead.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-create-a-sparkline-control-e4689

Form1.cs

using System;
using System.Drawing;
using System.Windows.Forms;
using DevExpress.Sparkline;
using DevExpress.XtraEditors;
        private SparklineEdit CreateSparkline() {
            // Create a Sparkline editor and set its dock style.
            SparklineEdit sparkline = new SparklineEdit();
            sparkline.Dock = DockStyle.Fill;

            sparkline.EditValue = CreateData();

            // Create an Area view and assign it to the sparkline.
            AreaSparklineView view = new AreaSparklineView();
            sparkline.Properties.View = view;

            // Customize area appearance.
            view.Color = Color.Aqua;
            view.AreaOpacity = 50;

            // Show markerks.
            view.HighlightStartPoint = true;
            view.HighlightEndPoint = true;
            view.HighlightMaxPoint = true;
            view.HighlightMinPoint = true;
            view.HighlightNegativePoints = true;
            view.SetSizeForAllMarkers(10);

            return sparkline;
        }

        private double[] CreateData() {
            return new double[] { 2, 4, 5, 1, -1, -2, -1, 2, 4, 5, 6, 3, 5, 4, 8, -1, 6 };
        }

Form1.vb

Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports DevExpress.Sparkline
Imports DevExpress.XtraEditors
        Private Function CreateSparkline() As SparklineEdit
            ' Create a Sparkline editor and set its dock style.
            Dim sparkline As New SparklineEdit()
            sparkline.Dock = DockStyle.Fill

            sparkline.EditValue = CreateData()

            ' Create an Area view and assign it to the sparkline.
            Dim view As New AreaSparklineView()
            sparkline.Properties.View = view

            ' Customize area appearance.
            view.Color = Color.Aqua
            view.AreaOpacity = 50

            ' Show markerks.
            view.HighlightStartPoint = True
            view.HighlightEndPoint = True
            view.HighlightMaxPoint = True
            view.HighlightMinPoint = True
            view.HighlightNegativePoints = True
            view.SetSizeForAllMarkers(10)

            Return sparkline
        End Function

        Private Function CreateData() As Double()
            Return New Double() { 2, 4, 5, 1, -1, -2, -1, 2, 4, 5, 6, 3, 5, 4, 8, -1, 6 }
        End Function

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the AreaOpacity 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#

how-to-create-a-sparkline-control-e4689/CS/SparklineSample/Form1.cs#L34

view.Color = Color.Aqua;
view.AreaOpacity = 50;

VB.NET

how-to-create-a-sparkline-control-e4689/VB/SparklineSample/Form1.vb#L36

view.Color = Color.Aqua
view.AreaOpacity = 50