Question

现在正在学习C＃和WPF约5或6周，我在一个项目上作为实习生工作。没有做坏事，但现在我被卡住了，我无法弄清楚为什么。尝试将WinForms应用程序迁移到WPF。旧的应用程序使用Z-graphs，编写了OxyPlot的代码，但我的图表没有显示，我不明白为什么。

XAML

<Border BorderBrush="{StaticResource chromeBrush}" BorderThickness="5 5 5 5" Margin="2 3 0 2" Grid.Column="3" Grid.ColumnSpan="36" Grid.Row="3" Grid.RowSpan="33" Background="Black"> <DockPanel> <DockPanel.DataContext> <local:Main/> </DockPanel.DataContext> <oxy:Plot Model="{Binding openPlot}" /> </DockPanel> </Border>

和C＃

public partial class Main : Window
{

    public Dictionary<string, DoorData> doorList;

    public Main()
    {
        //this.InitializeComponent();
        doorList = new Dictionary<string, DoorData>();

    }

    public DoorData doorGraphs = new DoorData();

    private void unitList_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        string selectedUnit = unitList.SelectedItem.ToString();
        doorGraphs = doorList[selectedUnit];

        this.Title = selectedUnit + " Open";
        PlotModel openPlot = new PlotModel();

        List<SmartDDUOperation> values = doorGraphs.Data;
        doorGraphs.FilterToType(SmartOperationType.Open);
        IEnumerable<SmartDDUOperation> drawOrder = values.OrderByDescending(x => x.TimeStamp);

        List<LineSeries> linePointsArray = new List<LineSeries>();
        foreach (SmartDDUOperation doorOp in drawOrder)
        {
            List<Tuple<double, double>> points = new List<Tuple<double, double>>();
            points = doorOp.GetTimePoints2();
            LineSeries linePoints = new LineSeries();

            foreach (Tuple<double, double> p in points)
            {
                DataPoint XYPoint = new DataPoint(p.Item1, p.Item2);
                linePoints.Points.Add(XYPoint);
            }

            linePointsArray.Add(linePoints);
        }

        LinearAxis Xaxis = new LinearAxis();
        Xaxis.Maximum = 6;
        Xaxis.Minimum = 0;
        Xaxis.Position = AxisPosition.Bottom;
        Xaxis.Title = "Time (s)";
        openPlot.Axes.Add(Xaxis);

        LinearAxis Yaxis = new LinearAxis();
        Yaxis.Maximum = 12;
        Yaxis.Minimum = 1;
        Yaxis.Position = AxisPosition.Left;
        Yaxis.Title = "Door Position";
        openPlot.Axes.Add(Yaxis);

        // Adds each series to the graph

        foreach (var series in linePointsArray)
        {
            openPlot.Series.Add(series);
        }



    }

使用以下命名空间......

enter using OxyPlot; using OxyPlot.Annotations; using OxyPlot.Series; using OxyPlot.Axes;

就像我说的那样，只有一个初学者，因此可能存在一些明显的错误。随意指出并教育我。

由于

Answer 1

您在方法中声明了PlotModel ...当您离开该函数时，它将超出范围。所以你什么都没有约束力。您的PlotModel需要在ViewModel / Main中公开访问并声明。

Answer 2

我自己是OxyPlot的新手。据我所知，您可能需要包含一个使用

using OxyPlot.WPF;

声明。

同时致电

openPlot InvalidatePlot(true);

可能需要触发重绘。

您可能需要添加

openPlot.Series.Clear();

在添加系列之前，如果有任何方法可能会再次添加这些系列。

与OxyPlot苦苦挣扎

2 个答案: