散形线图

散形线图 是由 ScatterLineSeriesView 对象来表示的，此对象属于点、折线和样条系列视图。这种视图以系列点在集合中一致的顺序来呈现系列点。与其他视图类型不同的是，这种视图按照参数对系列点排序，并且某些有相同参数的点沿 X 轴聚集到一个位置中。一个较好的例子是这种视图类型在所有其他方面与折线图最相似。或者，可以把散形线图与点图进行比较，(二者中只有) 散形线图的点是通过线条连接的。

例如，下面的插图展示了一个散形线图，它呈现了一个阿基米德涡线图。

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	ScatterLineSeriesView
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散形线图组合使用的信息，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 ScatterLineSeriesView 类型的系列)，并把图表添加到窗体中。注意，仅针对这种特定的刻度类型，典型的是没有按照参数对系列点排序，而是改为按照系列点被添加到集合中的顺序来显示它们。

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 DevExpress.XtraCharts; // ... private void Form1_Load(object sender, EventArgs e) { // Create a new chart. ChartControl scatterLineChart = new ChartControl(); // Create a scatter line series. Series series1 = new Series("Series 1", ViewType.ScatterLine); // Add points to it. series1.Points.Add(new SeriesPoint(1, 2)); series1.Points.Add(new SeriesPoint(2, 10)); series1.Points.Add(new SeriesPoint(3, 4)); series1.Points.Add(new SeriesPoint(4, 12)); series1.Points.Add(new SeriesPoint(1.5, 17)); series1.Points.Add(new SeriesPoint(2.5, 3)); series1.Points.Add(new SeriesPoint(3.5, 14)); series1.Points.Add(new SeriesPoint(2, 6)); // Add the series to the chart. scatterLineChart.Series.Add(series1); // Set the numerical argument scale types for the series, // as it is qualitative, by default. series1.ArgumentScaleType = ScaleType.Numerical; // Access the view-type-specific options of the series. ((ScatterLineSeriesView)series1.View).LineStyle.DashStyle = DashStyle.Dash; // Access the type-specific options of the diagram. ((XYDiagram)scatterLineChart.Diagram).EnableAxisXZooming = true; // Hide the legend (if necessary). scatterLineChart.Legend.Visible = false; // Add a title to the chart (if necessary). scatterLineChart.Titles.Add(new ChartTitle()); scatterLineChart.Titles[0].Text = "A Scatter Line Chart"; // Add the chart to the form. scatterLineChart.Dock = DockStyle.Fill; this.Controls.Add(scatterLineChart); }

C#

复制代码

using DevExpress.XtraCharts;
// ...

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

    // Create a scatter line series.
    Series series1 = new Series("Series 1", ViewType.ScatterLine);

    // Add points to it.
    series1.Points.Add(new SeriesPoint(1, 2));
    series1.Points.Add(new SeriesPoint(2, 10));
    series1.Points.Add(new SeriesPoint(3, 4));
    series1.Points.Add(new SeriesPoint(4, 12));
    series1.Points.Add(new SeriesPoint(1.5, 17));
    series1.Points.Add(new SeriesPoint(2.5, 3));
    series1.Points.Add(new SeriesPoint(3.5, 14));
    series1.Points.Add(new SeriesPoint(2, 6));

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

    // Set the numerical argument scale types for the series,
    // as it is qualitative, by default.
    series1.ArgumentScaleType = ScaleType.Numerical;

    // Access the view-type-specific options of the series.
    ((ScatterLineSeriesView)series1.View).LineStyle.DashStyle = DashStyle.Dash;

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

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

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

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

Visual Basic	复制代码
Imports DevExpress.XtraCharts ' ... Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load ' Create a new chart. Dim scatterLineChart As New ChartControl() ' Create a scatter line series. Dim series1 As New Series("Series 1", ViewType.ScatterLine) ' Add points to it. series1.Points.Add(New SeriesPoint(1, 2)) series1.Points.Add(New SeriesPoint(2, 10)) series1.Points.Add(New SeriesPoint(3, 4)) series1.Points.Add(New SeriesPoint(4, 12)) series1.Points.Add(New SeriesPoint(1.5, 17)) series1.Points.Add(New SeriesPoint(2.5, 3)) series1.Points.Add(New SeriesPoint(3.5, 14)) series1.Points.Add(New SeriesPoint(2, 6)) ' Add the series to the chart. scatterLineChart.Series.Add(series1) ' Set the numerical argument scale types for the series, ' as it is qualitative, by default. series1.ArgumentScaleType = ScaleType.Numerical ' Access the view-type-specific options of the series. CType(series1.View, ScatterLineSeriesView).LineStyle.DashStyle = DashStyle.Dash ' Access the type-specific options of the diagram. CType(scatterLineChart.Diagram, XYDiagram).EnableAxisXZooming = True ' Hide the legend (if necessary). scatterLineChart.Legend.Visible = False ' Add a title to the chart (if necessary). scatterLineChart.Titles.Add(New ChartTitle()) scatterLineChart.Titles(0).Text = "A Scatter Line Chart" ' Add the chart to the form. scatterLineChart.Dock = DockStyle.Fill Me.Controls.Add(scatterLineChart) End Sub

Visual Basic

复制代码

Imports DevExpress.XtraCharts
' ...

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

    ' Create a scatter line series.
    Dim series1 As New Series("Series 1", ViewType.ScatterLine)

    ' Add points to it.
    series1.Points.Add(New SeriesPoint(1, 2))
    series1.Points.Add(New SeriesPoint(2, 10))
    series1.Points.Add(New SeriesPoint(3, 4))
    series1.Points.Add(New SeriesPoint(4, 12))
    series1.Points.Add(New SeriesPoint(1.5, 17))
    series1.Points.Add(New SeriesPoint(2.5, 3))
    series1.Points.Add(New SeriesPoint(3.5, 14))
    series1.Points.Add(New SeriesPoint(2, 6))

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

    ' Set the numerical argument scale types for the series,
    ' as it is qualitative, by default.
    series1.ArgumentScaleType = ScaleType.Numerical

    ' Access the view-type-specific options of the series.
    CType(series1.View, ScatterLineSeriesView).LineStyle.DashStyle = DashStyle.Dash

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

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

    ' Add a title to the chart (if necessary).
    scatterLineChart.Titles.Add(New ChartTitle())
    scatterLineChart.Titles(0).Text = "A Scatter Line Chart"

    ' Add the chart to the form.
    scatterLineChart.Dock = DockStyle.Fill
    Me.Controls.Add(scatterLineChart)
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=E1472。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