Question

我有一个我在WinForms应用程序中通过图表控件创建的极坐标图表。 X轴类型为距离，Y轴类型为方位角。

我的问题是我不能在中心设置X，Y初始点，即（0,0），它总是出现在不同的地方。如图1所示 enter image description here

如上图所示，方位角值在270处为零，在90处为360，距离在180处为0，在0处为100。这是我用来创建极坐标图的代码。

public PolarChart()
    {
        this.WindowState = FormWindowState.Maximized;
        InitializeComponent();

        Series s0 = new Series("PolarChart");
        s0.Color = Color.Gray;
        s0.ChartType = SeriesChartType.Polar;
        s0.Points.AddXY(0, 0);
        chart1.Series.Add(s0);
        chart1.Series[0]["PolarDrawingStyle"] = "line";
        chart1.ChartAreas[0].AxisX.Minimum = 0;
        chart1.ChartAreas[0].AxisX.Maximum = 360;
        chart1.ChartAreas[0].AxisX.Interval = 30;
        chart1.ChartAreas[0].AxisY.Minimum = 0;
        chart1.ChartAreas[0].AxisY.Maximum = 100;
        chart1.ChartAreas[0].AxisY.Interval = 10;            
    }

 private void btnDisplay_Click(object sender, EventArgs e)
    {

        TextFieldParser reader = new TextFieldParser("LFPoints.txt");
        reader.Delimiters = new string[] { "," };
        reader.HasFieldsEnclosedInQuotes = true;
        string[] read = reader.ReadFields();
        try
        {

            Series S2 = new Series("Plot");
            S2.ChartType = SeriesChartType.Polar;
            S2.BorderColor = Color.Red;
            if (read != null)

                if (read.Length != 0)
                {
                    foreach (string other in read)
                    {
                        ComputeDistanceAngle(other, Base);
                        S2.Points.AddXY(Azimuth, Distance);
                    }
                    chart1.Series.Add(S2);
                    chart1.Series["LFPlot"]["PolarDrawingStyle"] = "marker";
                }
                else
                {
                    MessageBox.Show("No Graph to Plot");
                }
            else
                MessageBox.Show("No Graph to Plot");
        }
        catch (Exception)
        {

        }
    }

private void chart1_MouseMove(object sender, MouseEventArgs e)
    {
        var pos = e.Location;
        if (prevPosition.HasValue && pos == prevPosition.Value)
            return;
        tooltip.RemoveAll();
        prevPosition = pos;
        var results = chart1.HitTest(pos.X, pos.Y, false,
                                     ChartElementType.PlottingArea);
        foreach (var result in results)
        {
            if (result.ChartElementType == ChartElementType.PlottingArea)
            {
                var xVal = result.ChartArea.AxisX.PixelPositionToValue(pos.X);
                var yVal = result.ChartArea.AxisY.PixelPositionToValue(pos.Y);

                tooltip.Show("Azimuth = " + xVal + "\n"+" Distance = " + yVal, this.chart1,
                             pos.X, pos.Y - 15);
            }
        }
    }

在我经常尝试之后，我开始了解＆＃34; Crossing＆＃34;属性。

chart1.ChartAreas[0].AxisX.Crossing = 90;
chart1.ChartAreas[0].AxisY.Crossing = 0;

但我没有得到我需要的东西。所以请帮我绘制极坐标图表中的点，从中心开始用X和Y点。这是我需要极地图表的链接。 enter link description here

我正在使用Visual Studio 2010。

极坐标图x轴y轴（0,0）放置在C＃winforms VS2010中

0 个答案: