如何在C#图表库中绘制空白点?我不希望在图表中绘制最后一个空值为11/10的0值,但是尽管将其设置为空点,但它的值为0。
查看此处的图表。
以下是代码:
void Main()
{
System.Windows.Forms.DataVisualization.Charting.Chart chart1 = new Chart();
ChartArea chartArea1 = new ChartArea("foobar");
chartArea1.Name = "ChartArea1";
chart1.ChartAreas.Add(chartArea1);
chart1.Name = "chart1";
chart1.Palette = System.Windows.Forms.DataVisualization.Charting.ChartColorPalette.Fire;
Series series1 = new Series("seriesfoo")
{
XValueType = ChartValueType.Date,
ChartArea = "ChartArea1",
ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.StackedArea,
Legend = "Legend1",
Name = "MyGraph",
IsXValueIndexed = true,
};
Series series2 = new Series("seriesbar")
{
XValueType = ChartValueType.Date,
ChartArea = "ChartArea1",
ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line,
Legend = "Legend1",
Name = "Gap",
IsXValueIndexed = true,
YAxisType = System.Windows.Forms.DataVisualization.Charting.AxisType.Secondary,
YValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.Double
};
chart1.Series.Add(series1);
chart1.Series.Add(series2);
chart1.Size = new System.Drawing.Size(797, 267);
chart1.Text = "chart1";
int[] dat = {20, 19, 10};
for (int i = 0; i < dat.Length; i++ )
{
// Add X and Y values for a point.
chart1.Series[0].Points.AddXY(DateTime.Today.AddDays(i), dat[i]);
}
int[] dat2 = {20, 16, 12, 8, 4, 0};
for (int i = 0; i < dat2.Length; i++ )
{
chart1.Series[1].Points.AddXY(DateTime.Today.AddDays(i), dat2[i]);
}
chart1.DataManipulator.InsertEmptyPoints(1, IntervalType.Days, "MyGraph, Gap");
chart1.DataManipulator.IsEmptyPointIgnored = true;
MemoryStream stream = new MemoryStream(2048);
chart1.SaveImage("C:\\temp\\chart.png", ChartImageFormat.Png);
}
答案 0 :(得分:2)
我找到了答案,不得不设置。
chart1.Series[0].EmptyPointStyle.Color = Color.Transparent;
另外,我要从系列中删除下面的属性,这会干扰上面的风格,并且尽管设置了空的点颜色,但总是提到这一点。
BackGradientStyle = GradientStyle.TopBottom,