我有16张图表[最大]，每张图中有4条快速线。在每个图中，3个快速线表示最小值，最大值和理想值。第4条快线是硬件的实际值。我必须运行18,000个样本的测试。因此，已经绘制了前3条快速线，当开关打开并且数据进入时，绘制第4条快线。为了绘制第4行，我使用方法Series4.Add（actualvalue，“”，color.red）。 这是问题所在。每次在第4行绘制样本。必须刷新图表才能查看该样本的绘图。这也重绘了其他3条快线，每条快线有18,000个样本。所以它重新绘制了许多样本而没有一次又一次地使用。我只需画第四条快线。 我不能使用数组来填充值，然后将其指定为fastline的源，因为我事先没有任何值。我尝试了seri4.repaint（）方法和series4.refreshseries（）方法，但实际上并没有重新绘制第四个系列。我们必须刷新整个图表。 因此，它会降低性能，因为每个快线中的样本数量很大[18,000]，一个图表有4条快线，总共有16个这样的图形。
我已经完成了 Series4.AutoRepaint = false，Series4.DrawAllPoints = false; Series4.XValues.Order = ValueListOrder.None，Series4.YValues.Order = ValueListOrder.None
有什么方法可以提高性能吗？ 谢谢。
答案 0 :(得分：2)
我制作了一个简单的代码，其中我添加了4个图表，其中包含4个FastLines，每个快线使用18000个点，使用表格添加初始值，并在我仅更新Series4的值之后。性能对于我绘制的值的数量是好的：
public Form1()
{
InitializeComponent();
InitializeChart();
}
// Steema.TeeChart.Styles.FastLine Series1;
Timer timer1, timer2,timer3, timer4;
Random r;
DateTime dt;
DateTime[] Xvalues1;
double[] Yvalues1;
Steema.TeeChart.TChart tChart1, tChart2, tChart3,tChart4;
private void InitializeChart()
{
tChart1 = new TChart();
tChart2 = new TChart();
tChart3 = new TChart();
tChart4 = new TChart();
this.Controls.Add(tChart1);
this.Controls.Add(tChart2);
this.Controls.Add(tChart3);
this.Controls.Add(tChart4);
//Initialize Locations and size
this.Width = 908;
this.Height = 600;
//Location
tChart1.Left = 12;
tChart1.Top = 53;
tChart2.Left = 468;
tChart2.Top = 53;
tChart3.Left = 12;
tChart3.Top = 318;
tChart4.Left = 468;
tChart4.Top = 318;
//Size
tChart1.Width = 373;
tChart1.Height = 236;
tChart2.Width = 373;
tChart2.Height = 236;
tChart3.Width = 373;
tChart3.Height = 236;
tChart4.Width = 373;
tChart4.Height = 236;
tChart1.Aspect.View3D = false;
tChart2.Aspect.View3D = false;
tChart3.Aspect.View3D = false;
tChart4.Aspect.View3D = false;
tChart1.Legend.Visible = false;
tChart2.Legend.Visible = false;
tChart3.Legend.Visible = false;
tChart4.Legend.Visible = false;
tChart1.Panel.Gradient.Visible = false;
tChart2.Panel.Gradient.Visible = false;
tChart3.Panel.Gradient.Visible = false;
tChart4.Panel.Gradient.Visible = false;
tChart1.Axes.Bottom.AxisPen.Visible = false;
tChart2.Axes.Bottom.AxisPen.Visible = false;
tChart3.Axes.Bottom.AxisPen.Visible = false;
tChart4.Axes.Bottom.AxisPen.Visible = false;
tChart1.Axes.Left.AxisPen.Visible = false;
tChart2.Axes.Left.AxisPen.Visible = false;
tChart3.Axes.Left.AxisPen.Visible = false;
tChart4.Axes.Left.AxisPen.Visible = false;
//Series
tChart1.AutoRepaint = false;
tChart2.AutoRepaint = false;
tChart3.AutoRepaint = false;
tChart4.AutoRepaint = false;
for (int i = 0; i < 4; i++)
{
new Steema.TeeChart.Styles.FastLine(tChart1.Chart);
new Steema.TeeChart.Styles.FastLine(tChart2.Chart);
new Steema.TeeChart.Styles.FastLine(tChart3.Chart);
new Steema.TeeChart.Styles.FastLine(tChart4.Chart);
tChart1[i].XValues.DateTime=true;
tChart2[i].XValues.DateTime = true;
tChart3[i].XValues.DateTime = true;
tChart4[i].XValues.DateTime = true;
InitialDataSeries(tChart1[i]);
InitialDataSeries(tChart2[i]);
InitialDataSeries(tChart3[i]);
InitialDataSeries(tChart4[i]);
}
//Axes labels
tChart1.Axes.Bottom.Labels.DateTimeFormat = "dd/MM";
tChart1.Axes.Bottom.Labels.Angle = 90;
tChart2.Axes.Bottom.Labels.DateTimeFormat = "dd/MM";
tChart2.Axes.Bottom.Labels.Angle = 90;
tChart3.Axes.Bottom.Labels.DateTimeFormat = "dd/MM";
tChart3.Axes.Bottom.Labels.Angle = 90;
tChart4.Axes.Bottom.Labels.DateTimeFormat = "dd/MM";
tChart4.Axes.Bottom.Labels.Angle = 90;
tChart1.AutoRepaint = true;
tChart2.AutoRepaint = true;
tChart3.AutoRepaint = true;
tChart4.AutoRepaint = true;
tChart1.Refresh();
tChart2.Refresh();
tChart3.Refresh();
tChart4.Refresh();
//Timer
timer1 = new Timer();
timer1.Start();
timer1.Interval = 100;
timer1.Tick += new EventHandler(timer1_Tick);
}
void timer1_Tick(object sender, EventArgs e)
{
//See the chart data updated.
tChart1[0].Visible = false;
tChart1[1].Visible = false;
tChart1[2].Visible = false;
PopulateSeries(tChart1[3]);
PopulateSeries(tChart2[3]);
PopulateSeries(tChart3[3]);
PopulateSeries(tChart4[3]);
}
private void PopulateSeries(Steema.TeeChart.Styles.Series Series1)
{
r = new Random();
dt = DateTime.Now;
tChart1.AutoRepaint = false;
tChart2.AutoRepaint = false;
tChart3.AutoRepaint = false;
tChart4.AutoRepaint = false;
// show only 50 points - delete the rest
while (Series1.Count > 10000)
{
Series1.Delete(0);
}
if (Series1.Count > 10000)
{
Series1.Delete(0);
}
else
{
for (int t = 0; t < 100; t++)
{
Series1.Add(dt, r.Next(1000));
dt = dt.AddSeconds(15);
}
}
tChart1.AutoRepaint = true;
tChart2.AutoRepaint = true;
tChart3.AutoRepaint = true;
tChart4.AutoRepaint = true;
tChart1.Refresh();
tChart2.Refresh();
tChart3.Refresh();
tChart4.Refresh();
}
private void InitialDataSeries(Steema.TeeChart.Styles.Series Series1)
{
//Arrays
dt = DateTime.Now;
r = new Random();
Xvalues1 = new DateTime[18000];
Yvalues1 = new double[18000];
(Series1 as Steema.TeeChart.Styles.FastLine).DrawAllPoints = false;
for (int j = 0; j < 18000; j++)
{
Xvalues1[j] = dt;
dt = dt.AddSeconds(15);
Yvalues1[j] = r.Next(1000);
}
Series1.Add(Xvalues1, Yvalues1);
}
你能告诉我们它对你有帮助吗？另一方面，如果我的代码对您没有帮助，我建议您使用TeeChartDirect2D，这是DSP实时应用程序所需的高速数据吞吐量的理想选择。有关详细信息，请参阅白皮书Boosting graphics-rendering performance in Windows Forms。
谢谢，