如何在OxyPlot图表上绘制MULTIPLE LineSeries？

Question

我为问这么多OxyPlot问题而道歉,但我似乎真的在努力使用OxyPlot图表控件.

我的项目是WPF格式,所以我最初使用托管的WINFORMS图表,它就像一个魅力,并且做了我需要的所有内容,直到我需要在托管的winform图表上覆盖WPF元素.由于"AirSpace"问题,无论我做什么,我都无法看到我放在托管图表顶部的WPF元素.那时我决定选择OxyPlot,这给我带来了很多令人头痛的问题.

这是我的原始问题!我在CodePlex询问过.我似乎没有得到太多帮助,所以我在这里再试一次.

我的问题是:

有谁知道如何将多个LineSeries绘制到一个图上？

到目前为止我的方法:

我正在使用ac#List数组并添加一个包含要绘制的新数据的LineSeries的新副本.我的代码:

    // Function to plot data
    private void plotData(double numWeeks, double startingSS)
    {

        // Initialize new Salt Split class for acess to data variables
        Salt_Split_Builder calcSS = new Salt_Split_Builder();
        calcSS.compute(numWeeks, startingSS, maxDegSS);

        // Create the OxyPlot graph for Salt Split
        OxyPlot.Wpf.PlotView plot = new OxyPlot.Wpf.PlotView();

        var model = new PlotModel();

        // Add Chart Title
        model.Title = "Salt Split Degradation";

        // Create new Line Series
        LineSeries linePoints = new LineSeries() { StrokeThickness = 1, MarkerSize = 1, Title = numWeeks.ToString() + " weeks" };


        // Add each point to the new series
        foreach (var point in calcSS.saltSplitCurve)
        {
            DataPoint XYpoint = new DataPoint();
            XYpoint = new DataPoint(point.Key, point.Value * 100);
            linePoints.Format("%", XYpoint.Y);
            linePoints.Points.Add(XYpoint);
        }

        listPointAray.Add(linePoints);


        // Define X-Axis
        var Xaxis = new OxyPlot.Axes.LinearAxis();
        Xaxis.Maximum = numWeeks;
        Xaxis.Minimum = 0;
        Xaxis.Position = OxyPlot.Axes.AxisPosition.Bottom;
        Xaxis.Title = "Number of Weeks";
        model.Axes.Add(Xaxis);

        //Define Y-Axis
        var Yaxis = new OxyPlot.Axes.LinearAxis();
        Yaxis.MajorStep = 15;
        Yaxis.Maximum = calcSS.saltSplitCurve.Last().Value * 100;
        Yaxis.MaximumPadding = 0;
        Yaxis.Minimum = 0;
        Yaxis.MinimumPadding = 0;
        Yaxis.MinorStep = 5;
        Yaxis.Title = "Percent Degradation";
        model.Axes.Add(Yaxis);

        // Add Each series to the
        foreach (var series in listPointAray)
        {
            LineSeries newpoints = new LineSeries();
            newpoints = linePoints;
            model.Series.Add(newpoints);
        }


        // Add the plot to the window
        plot.Model = model;
        SaltSplitChartGrid.Children.Add(plot);

    }

```

我的代码第一次按下"图形数据"按钮时工作,但在连续尝试时失败并出现以下错误:

该元素无法添加,它已属于Plot Model

下图是我想要生成的图表类型(使用WinForms Chart控件可以正常工作):

图片http://i59.tinypic.com/jqs3n9.jpg

我想在每次运行方法时绘制一个新颜色的新线.

Answer 1

这就是我之前在OxyPlot图表上创建多行的关键,关键是为每个系列创建一组DataPoints - 在以下示例代码中称为circlePoints和linePoints,然后将这些数据绑定到CircleSeries和LineSeries:

var xAxis = new DateTimeAxis
{
    Position = AxisPosition.Bottom,
    StringFormat = Constants.MarketData.DisplayDateFormat,
    Title = "End of Day",
    IntervalLength = 75,
    MinorIntervalType = DateTimeIntervalType.Days,
    IntervalType = DateTimeIntervalType.Days,
    MajorGridlineStyle = LineStyle.Solid,
    MinorGridlineStyle = LineStyle.None,
};

var yAxis = new LinearAxis
{
    Position = AxisPosition.Left,
    Title = "Value",
    MajorGridlineStyle = LineStyle.Solid,
    MinorGridlineStyle = LineStyle.None
};

var plot = new PlotModel();
plot.Axes.Add(xAxis);
plot.Axes.Add(yAxis);

var circlePoints = new[]
{
    new ScatterPoint(DateTimeAxis.ToDouble(date1), value1),
    new ScatterPoint(DateTimeAxis.ToDouble(date2), value2),
};

var circleSeries =  new ScatterSeries
{
    MarkerSize = 7,
    MarkerType = MarkerType.Circle,
    ItemsSource = circlePoints
};

var linePoints = new[]
{
    new DataPoint(DateTimeAxis.ToDouble(date1), value1),
    new DataPoint(DateTimeAxis.ToDouble(date2), value2),
};

var lineSeries = new LineSeries
{
    StrokeThickness = 2,
    Color = LineDataPointColor,
    ItemsSource = linePoints
};

plot.Series.Add(circleSeries);
plot.Series.Add(lineSeries);

Answer 2

成功！！！！

AwkwardCoder，谢谢你的帮助，但我意识到我的错误只是我忽略了一些事情！

这是有效的代码版本：

        // Make a new plotmodel
    private PlotModel model = new PlotModel();

    // Create the OxyPlot graph for Salt Split
    private OxyPlot.Wpf.PlotView plot = new OxyPlot.Wpf.PlotView();

    // Function to plot data
    private void plotData(double numWeeks, double startingSS)
    {
        List<LineSeries> listPointAray = new List<LineSeries>();

        // Initialize new Salt Split class for acess to data variables
        Salt_Split_Builder calcSS = new Salt_Split_Builder();
        calcSS.compute(numWeeks, startingSS, maxDegSS);

        // Create new Line Series
        LineSeries linePoints = new LineSeries() 
        { StrokeThickness = 1, MarkerSize = 1, Title = numWeeks.ToString() + " weeks" };


        // Add each point to the new series
        foreach (var point in calcSS.saltSplitCurve)
        {
            DataPoint XYpoint = new DataPoint();
            XYpoint = new DataPoint(point.Key, point.Value * 100);
            linePoints.Format("%", XYpoint.Y);
            linePoints.Points.Add(XYpoint);
        }

        listPointAray.Add(linePoints);

        // Add Chart Title
        model.Title = "Salt Split Degradation";

        // Add Each series to the
        foreach (var series in listPointAray)
        {
            // Define X-Axis
            OxyPlot.Axes.LinearAxis Xaxis = new OxyPlot.Axes.LinearAxis();
            Xaxis.Maximum = numWeeks;
            Xaxis.Minimum = 0;
            Xaxis.Position = OxyPlot.Axes.AxisPosition.Bottom;
            Xaxis.Title = "Number of Weeks";
            model.Axes.Add(Xaxis);

            //Define Y-Axis
            OxyPlot.Axes.LinearAxis Yaxis = new OxyPlot.Axes.LinearAxis();
            Yaxis.MajorStep = 15;
            Yaxis.Maximum = calcSS.saltSplitCurve.Last().Value * 100;
            Yaxis.MaximumPadding = 0;
            Yaxis.Minimum = 0;
            Yaxis.MinimumPadding = 0;
            Yaxis.MinorStep = 5;
            Yaxis.Title = "Percent Degradation";
            //Yaxis.StringFormat = "{0.00} %";
            model.Axes.Add(Yaxis);

            model.Series.Add(series);
        }


        // Add the plot to the window

        plot.Model = model;
        plot.InvalidatePlot(true);
        SaltSplitChartGrid.Children.Clear();
        SaltSplitChartGrid.Children.Add(plot);

    }

以下是我做错的多件事：

1. 在我的 foreach var 系列循环中，我添加了已添加的原始系列，而不是列表中的下一个 var 系列！（哑的！）
2. 每次运行该方法时，我都在创建一个新模型。这意味着每次运行代码时，我都会添加之前模型中已经存在的系列。（也蠢！）
3. 我每次都在创建一个新图，并尝试在新图中添加一个已经属于前一个图的模型。（越来越傻了..）
4. 每次运行该方法时，该图都会添加到网格中，因此在重新添加相同的图之前，我必须先清除网格的子项。
5. 我没有刷新情节。

那是很多错误，但我克服了它。希望这对将来的某人有所帮助。另外，我知道我没有使用普通的数据绑定技术，但这至少是有效的。

最后结果：