面积图

面积图 是由 Area3DSeriesView 对象来表示的，此对象属于面积系列视图。这种视图把系列显示为图象上的填充面积，把每个数据点显示为区域中的峰、谷。当需要在同一个图象上显示多个系列的趋势时，或者显示局部与整体的关系时，使用这种视图。

在下面的插图中显示了一个面积图。

下表列出了这种图表类型的主要特征。

特征	取值
系列视图类型	Area3DSeriesView
图象类型	XYDiagram3D
每个数据点的参数个数	1
每个数据点的取值个数	1

注意
要获得关于哪些图表类型可以与面积图组合使用的信息，请参阅组合使用不同的系列视图文档。

下面的示例演示了在运行时刻如何创建 ChartControl (拥有一个 Area3DSeriesView 类型的系列)，设置它的常规属性，并把图表添加到窗体中。在继续本示例之前，首先要在 Visual Studio 中创建一个 Windows 窗体应用程序，并把所有必需的程序集包含到项目的“引用”列表中。

然后，把下列代码添加到 Form.Load 事件处理程序。

C#	复制代码
using System; using System.Windows.Forms; using DevExpress.XtraCharts; // ... private void Form1_Load(object sender, EventArgs e) { // Create a new chart. ChartControl areaChart3D = new ChartControl(); // Add an area series to it. Series series1 = new Series("Series 1", ViewType.Area3D); // Add points to the series. series1.Points.Add(new SeriesPoint("A", 10)); series1.Points.Add(new SeriesPoint("B", 2)); series1.Points.Add(new SeriesPoint("C", 14)); series1.Points.Add(new SeriesPoint("D", 7)); // Add the series to the chart. areaChart3D.Series.Add(series1); // Customize the view-type-specific properties of the series. ((Area3DSeriesView)series1.View).AreaWidth = 5; // Access the diagram's options. ((XYDiagram3D)areaChart3D.Diagram).ZoomPercent = 110; // Add a title to the chart and hide the legend. ChartTitle chartTitle1 = new ChartTitle(); chartTitle1.Text = "3D Area Chart"; areaChart3D.Titles.Add(chartTitle1); areaChart3D.Legend.Visible = false; // Add the chart to the form. areaChart3D.Dock = DockStyle.Fill; this.Controls.Add(areaChart3D); }

C#

复制代码

using System;
using System.Windows.Forms;
using DevExpress.XtraCharts;
// ...

private void Form1_Load(object sender, EventArgs e) {
    // Create a new chart.
    ChartControl areaChart3D = new ChartControl();

    // Add an area series to it.
    Series series1 = new Series("Series 1", ViewType.Area3D);
    
    // Add points to the series.
    series1.Points.Add(new SeriesPoint("A", 10));
    series1.Points.Add(new SeriesPoint("B", 2));
    series1.Points.Add(new SeriesPoint("C", 14));
    series1.Points.Add(new SeriesPoint("D", 7));

    // Add the series to the chart.
    areaChart3D.Series.Add(series1);

    // Customize the view-type-specific properties of the series.
    ((Area3DSeriesView)series1.View).AreaWidth = 5;

    // Access the diagram's options.
    ((XYDiagram3D)areaChart3D.Diagram).ZoomPercent = 110;

    // Add a title to the chart and hide the legend.
    ChartTitle chartTitle1 = new ChartTitle();
    chartTitle1.Text = "3D Area Chart";
    areaChart3D.Titles.Add(chartTitle1);
    areaChart3D.Legend.Visible = false;

    // Add the chart to the form.
    areaChart3D.Dock = DockStyle.Fill;
    this.Controls.Add(areaChart3D);
}

Visual Basic	复制代码
Imports System Imports System.Windows.Forms Imports DevExpress.XtraCharts ' ... Private Sub Form1_Load(ByVal sender As Object, _ ByVal e As EventArgs) Handles MyBase.Load ' Create a new chart. Dim areaChart3D As New ChartControl() ' Add an area series to it. Dim series1 As New Series("Series 1", ViewType.Area3D) ' Add points to the series. series1.Points.Add(New SeriesPoint("A", 10)) series1.Points.Add(New SeriesPoint("B", 2)) series1.Points.Add(New SeriesPoint("C", 14)) series1.Points.Add(New SeriesPoint("D", 7)) ' Add the series to the chart. areaChart3D.Series.Add(series1) ' Customize the view-type-specific properties of the series. CType(series1.View, Area3DSeriesView).AreaWidth = 5 ' Access the diagram's options. CType(areaChart3D.Diagram, XYDiagram3D).ZoomPercent = 110 ' Add a title to the chart and hide the legend. Dim chartTitle1 As New ChartTitle() chartTitle1.Text = "3D Area Chart" areaChart3D.Titles.Add(chartTitle1) areaChart3D.Legend.Visible = False ' Add the chart to the form. areaChart3D.Dock = DockStyle.Fill Me.Controls.Add(areaChart3D) End Sub

Visual Basic

复制代码

Imports System
Imports System.Windows.Forms
Imports DevExpress.XtraCharts
' ...

Private Sub Form1_Load(ByVal sender As Object, _ 
ByVal e As EventArgs) Handles MyBase.Load
    ' Create a new chart.
    Dim areaChart3D As New ChartControl()

    ' Add an area series to it.
    Dim series1 As New Series("Series 1", ViewType.Area3D)

    ' Add points to the series.
    series1.Points.Add(New SeriesPoint("A", 10))
    series1.Points.Add(New SeriesPoint("B", 2))
    series1.Points.Add(New SeriesPoint("C", 14))
    series1.Points.Add(New SeriesPoint("D", 7))

    ' Add the series to the chart.
    areaChart3D.Series.Add(series1)

    ' Customize the view-type-specific properties of the series.
    CType(series1.View, Area3DSeriesView).AreaWidth = 5

    ' Access the diagram's options.
    CType(areaChart3D.Diagram, XYDiagram3D).ZoomPercent = 110

    ' Add a title to the chart and hide the legend.
    Dim chartTitle1 As New ChartTitle()
    chartTitle1.Text = "3D Area Chart"
    areaChart3D.Titles.Add(chartTitle1)
    areaChart3D.Legend.Visible = False

    ' Add the chart to the form.
    areaChart3D.Dock = DockStyle.Fill
    Me.Controls.Add(areaChart3D)
End Sub

Show Me
在 DevExpress Code Central 数据库中可以找到完整的示例项目，网址是 http://www.devexpress.com/example=E1019。取决于目标平台类型 (ASP.NET、WinForms 等)，可以在线运行本示例，或者下载自动可执行的示例。

三维 XY-图象

简要说明

图表类型特征

示例

参阅