堆积条形图

堆积条形图 是由 StackedBarSeriesView 对象来表示的，此对象属于条形和柱状系列视图。这种视图把不同系列中有相同参数的所有点显示为一个堆积条形 (例如，用于展示每个条形表示一个特定的类别)。因此，每个条形的高度取决于该类别的所有系列值的总计。

在下面的插图中显示了一个堆积条形图。注意，这种图表类型基于 XYDiagram，因此可以被旋转，从而垂直地或水平地显示图表。

注意
堆积条形图可以显示包含正值或负值数据点的系列。但是，有正值的系列只能与其他包含正值的系列相堆积；有负值的系列与其他包含负值的系列相堆积。注意，如果系列同时包含正值和负值数据点，那么它被作为有正值的系列进行处理，而它的所有负值都被视为零。

注意

堆积条形图可以显示包含正值或负值数据点的系列。但是，有正值的系列只能与其他包含正值的系列相堆积；有负值的系列与其他包含负值的系列相堆积。

注意，如果系列同时包含正值和负值数据点，那么它被作为有正值的系列进行处理，而它的所有负值都被视为零。

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	StackedBarSeriesView
图象类型	2D- XYDiagram
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堆积条形图组合使用的信息，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 (拥有两个 StackedBarSeriesView 类型的系列)，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 stackedBarChart = new ChartControl(); // Create two stacked bar series. Series series1 = new Series("Series 1", ViewType.StackedBar); Series series2 = new Series("Series 2", ViewType.StackedBar); // Add points to them series1.Points.Add(new SeriesPoint("A", 10)); series1.Points.Add(new SeriesPoint("B", 12)); series1.Points.Add(new SeriesPoint("C", 14)); series1.Points.Add(new SeriesPoint("D", 17)); series2.Points.Add(new SeriesPoint("A", 15)); series2.Points.Add(new SeriesPoint("B", 18)); series2.Points.Add(new SeriesPoint("C", 25)); series2.Points.Add(new SeriesPoint("D", 33)); // Add both series to the chart. stackedBarChart.Series.AddRange(new Series[] { series1, series2 }); // Access the view-type-specific options of the series. ((StackedBarSeriesView)series1.View).BarWidth = 0.8; // Access the type-specific options of the diagram. ((XYDiagram)stackedBarChart.Diagram).EnableAxisXZooming = true; // Hide the legend (if necessary). stackedBarChart.Legend.Visible = false; // Add a title to the chart (if necessary). stackedBarChart.Titles.Add(new ChartTitle()); stackedBarChart.Titles[0].Text = "A Stacked Bar Chart"; // Add the chart to the form. stackedBarChart.Dock = DockStyle.Fill; this.Controls.Add(stackedBarChart); }

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 stackedBarChart = new ChartControl();

    // Create two stacked bar series.
    Series series1 = new Series("Series 1", ViewType.StackedBar);
    Series series2 = new Series("Series 2", ViewType.StackedBar);
    
    // Add points to them
    series1.Points.Add(new SeriesPoint("A", 10));
    series1.Points.Add(new SeriesPoint("B", 12));
    series1.Points.Add(new SeriesPoint("C", 14));
    series1.Points.Add(new SeriesPoint("D", 17));
    
    series2.Points.Add(new SeriesPoint("A", 15));
    series2.Points.Add(new SeriesPoint("B", 18));
    series2.Points.Add(new SeriesPoint("C", 25));
    series2.Points.Add(new SeriesPoint("D", 33));

    // Add both series to the chart.
    stackedBarChart.Series.AddRange(new Series[] { series1, series2 });

    // Access the view-type-specific options of the series.
    ((StackedBarSeriesView)series1.View).BarWidth = 0.8;

    // Access the type-specific options of the diagram.
    ((XYDiagram)stackedBarChart.Diagram).EnableAxisXZooming = true;

    // Hide the legend (if necessary).
    stackedBarChart.Legend.Visible = false;

    // Add a title to the chart (if necessary).
    stackedBarChart.Titles.Add(new ChartTitle());
    stackedBarChart.Titles[0].Text = "A Stacked Bar Chart";

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

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 stackedBarChart As New ChartControl() ' Create two stacked bar series. Dim series1 As New Series("Series 1", ViewType.StackedBar) Dim series2 As New Series("Series 2", ViewType.StackedBar) ' Add points to them series1.Points.Add(New SeriesPoint("A", 10)) series1.Points.Add(New SeriesPoint("B", 12)) series1.Points.Add(New SeriesPoint("C", 14)) series1.Points.Add(New SeriesPoint("D", 17)) series2.Points.Add(New SeriesPoint("A", 15)) series2.Points.Add(New SeriesPoint("B", 18)) series2.Points.Add(New SeriesPoint("C", 25)) series2.Points.Add(New SeriesPoint("D", 33)) ' Add both series to the chart. stackedBarChart.Series.AddRange(New Series() { series1, series2 }) ' Access the view-type-specific options of the series. CType(series1.View, StackedBarSeriesView).BarWidth = 0.8 ' Access the type-specific options of the diagram. CType(stackedBarChart.Diagram, XYDiagram).EnableAxisXZooming = True ' Hide the legend (if necessary). stackedBarChart.Legend.Visible = False ' Add a title to the chart (if necessary). stackedBarChart.Titles.Add(New ChartTitle()) stackedBarChart.Titles(0).Text = "A Stacked Bar Chart" ' Add the chart to the form. stackedBarChart.Dock = DockStyle.Fill Me.Controls.Add(stackedBarChart) 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 stackedBarChart As New ChartControl()

    ' Create two stacked bar series.
    Dim series1 As New Series("Series 1", ViewType.StackedBar)
    Dim series2 As New Series("Series 2", ViewType.StackedBar)

    ' Add points to them
    series1.Points.Add(New SeriesPoint("A", 10))
    series1.Points.Add(New SeriesPoint("B", 12))
    series1.Points.Add(New SeriesPoint("C", 14))
    series1.Points.Add(New SeriesPoint("D", 17))

    series2.Points.Add(New SeriesPoint("A", 15))
    series2.Points.Add(New SeriesPoint("B", 18))
    series2.Points.Add(New SeriesPoint("C", 25))
    series2.Points.Add(New SeriesPoint("D", 33))

    ' Add both series to the chart.
    stackedBarChart.Series.AddRange(New Series() { series1, series2 })

    ' Access the view-type-specific options of the series.
    CType(series1.View, StackedBarSeriesView).BarWidth = 0.8

    ' Access the type-specific options of the diagram.
    CType(stackedBarChart.Diagram, XYDiagram).EnableAxisXZooming = True

    ' Hide the legend (if necessary).
    stackedBarChart.Legend.Visible = False

    ' Add a title to the chart (if necessary).
    stackedBarChart.Titles.Add(New ChartTitle())
    stackedBarChart.Titles(0).Text = "A Stacked Bar Chart"

    ' Add the chart to the form.
    stackedBarChart.Dock = DockStyle.Fill
    Me.Controls.Add(stackedBarChart)
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=E1211。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。

XY-图象

简要说明

图表类型特征

示例

参阅