Question

我使用图表绘制传感器的一些信息。一切都正常，直到我达到3660点的间隔。所以，我想要做的是当我的积分达到该值时，我的图表将删除第一个点并添加新点，看看代码：

if (graficoKVm.Series[0].Points.Count > 3660)
{
    graficoKVm.Series[0].Points.RemoveAt(0);
    graficoKVm.Series[0].Points.AddXY(DateTime.Now.ToOADate(), _sensorCampoEletroMagnetico.kVm);
    graficoKVm.ResetAutoValues();
}

问题在于，如果图表被缩放，当它执行graficoKVm.ResetAutoValues();时，我的变焦被搞砸了。到目前为止，我已尝试存储缩放值，然后在重置后应用缩放，但我没有实现它。这是图表声明：

this.graficoKVm.BackColor = System.Drawing.Color.Black;
this.graficoKVm.BorderSkin.BorderColor = System.Drawing.Color.White;
chartArea1.AxisX.Interval = 5D;
chartArea1.AxisX.IntervalType = System.Windows.Forms.DataVisualization.Charting.DateTimeIntervalType.Minutes;
chartArea1.AxisX.LabelStyle.Angle = 45;
chartArea1.AxisX.LabelStyle.ForeColor = System.Drawing.Color.White;
chartArea1.AxisX.LabelStyle.Format = "HH:mm";
chartArea1.AxisX.LineColor = System.Drawing.Color.White;
chartArea1.AxisX.MajorGrid.LineColor = System.Drawing.Color.White;
chartArea1.AxisX.MajorGrid.LineDashStyle = System.Windows.Forms.DataVisualization.Charting.ChartDashStyle.Dash;
chartArea1.AxisX.MajorTickMark.LineColor = System.Drawing.Color.White;
chartArea1.AxisX.MinorGrid.LineColor = System.Drawing.Color.White;
chartArea1.AxisX.MinorTickMark.LineColor = System.Drawing.Color.White;
chartArea1.AxisX.ScaleBreakStyle.LineColor = System.Drawing.Color.White;
chartArea1.AxisX.ScaleView.SizeType = System.Windows.Forms.DataVisualization.Charting.DateTimeIntervalType.Minutes;
chartArea1.AxisX.ScaleView.SmallScrollMinSize = 5D;
chartArea1.AxisX.ScaleView.SmallScrollMinSizeType = System.Windows.Forms.DataVisualization.Charting.DateTimeIntervalType.Minutes;
chartArea1.AxisX.ScaleView.SmallScrollSizeType = System.Windows.Forms.DataVisualization.Charting.DateTimeIntervalType.Minutes;
chartArea1.AxisX.ScrollBar.BackColor = System.Drawing.Color.LightGray;
chartArea1.AxisX.ScrollBar.ButtonColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
chartArea1.AxisX.ScrollBar.LineColor = System.Drawing.Color.Black;
chartArea1.AxisX2.LineColor = System.Drawing.Color.White;
chartArea1.AxisX2.LineDashStyle = System.Windows.Forms.DataVisualization.Charting.ChartDashStyle.Dash;
chartArea1.AxisX2.ScrollBar.BackColor = System.Drawing.Color.LightGray;
chartArea1.AxisX2.ScrollBar.ButtonColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
chartArea1.AxisX2.ScrollBar.LineColor = System.Drawing.Color.Black;
chartArea1.AxisY.Interval = 2D;
chartArea1.AxisY.IntervalType = System.Windows.Forms.DataVisualization.Charting.DateTimeIntervalType.Number;
chartArea1.AxisY.LabelStyle.ForeColor = System.Drawing.Color.White;
chartArea1.AxisY.MajorGrid.LineColor = System.Drawing.Color.White;
chartArea1.AxisY.MajorGrid.LineDashStyle = System.Windows.Forms.DataVisualization.Charting.ChartDashStyle.Dash;
chartArea1.AxisY.MajorTickMark.LineColor = System.Drawing.Color.White;
chartArea1.AxisY.Maximum = 18D;
chartArea1.AxisY.Minimum = -18D;
chartArea1.AxisY.MinorGrid.LineColor = System.Drawing.Color.White;
chartArea1.AxisY.MinorTickMark.LineColor = System.Drawing.Color.White;
chartArea1.AxisY.ScaleBreakStyle.LineColor = System.Drawing.Color.White;
chartArea1.AxisY.ScaleView.SmallScrollMinSize = 0.5D;
chartArea1.AxisY.ScaleView.SmallScrollSize = 0.5D;
chartArea1.AxisY.ScrollBar.BackColor = System.Drawing.Color.LightGray;
chartArea1.AxisY.ScrollBar.ButtonColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
chartArea1.AxisY.ScrollBar.LineColor = System.Drawing.Color.Black;
chartArea1.AxisY2.LineColor = System.Drawing.Color.White;
chartArea1.AxisY2.LineDashStyle = System.Windows.Forms.DataVisualization.Charting.ChartDashStyle.Dash;
chartArea1.AxisY2.ScrollBar.BackColor = System.Drawing.Color.LightGray;
chartArea1.AxisY2.ScrollBar.ButtonColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
chartArea1.AxisY2.ScrollBar.LineColor = System.Drawing.Color.Black;
chartArea1.BackColor = System.Drawing.Color.Black;
chartArea1.BorderColor = System.Drawing.Color.White;
chartArea1.CursorX.Interval = 0.01D;
chartArea1.CursorX.IntervalType = System.Windows.Forms.DataVisualization.Charting.DateTimeIntervalType.Minutes;
chartArea1.CursorX.IsUserEnabled = true;
chartArea1.CursorX.IsUserSelectionEnabled = true;
chartArea1.CursorX.SelectionColor = System.Drawing.Color.White;
chartArea1.CursorY.IsUserEnabled = true;
chartArea1.CursorY.IsUserSelectionEnabled = true;
chartArea1.CursorY.SelectionColor = System.Drawing.Color.White;
chartArea1.InnerPlotPosition.Auto = false;
chartArea1.InnerPlotPosition.Height = 91.06797F;
chartArea1.InnerPlotPosition.Width = 95F;
chartArea1.InnerPlotPosition.X = 5F;
chartArea1.InnerPlotPosition.Y = 2.16495F;
chartArea1.Name = "ChartArea1";
chartArea1.Position.Auto = false;
chartArea1.Position.Height = 97F;
chartArea1.Position.Width = 97F;
this.graficoKVm.ChartAreas.Add(chartArea1);
this.graficoKVm.Location = new System.Drawing.Point(3, 270);
this.graficoKVm.Margin = new System.Windows.Forms.Padding(0);
this.graficoKVm.Name = "graficoKVm";
series1.BorderWidth = 2;
series1.ChartArea = "ChartArea1";
series1.ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
series1.Color = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(128)))), ((int)(((byte)(0)))));
series1.IsVisibleInLegend = false;
series1.Name = "Valor";
series1.ShadowColor = System.Drawing.Color.Black;
series1.XValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.DateTime;
this.graficoKVm.Series.Add(series1);
this.graficoKVm.Size = new System.Drawing.Size(1201, 295);
this.graficoKVm.TabIndex = 27;
this.graficoKVm.Text = "chart1";

Answer 1

您是否尝试过使用Refresh或Update代码？当索引达到3660时，无论您应用了多少缩放，图表都将使用系列中保存的Point重新绘制。

Answer 2

为了让它以正确的方式运作，我已经完成了这个实现：

if (graficoKVm.Series[0].Points.Count > 3659)
{
    graficoKVm.Series[0].Points.AddXY(DateTime.Now.ToOADate(), _sensorCampoEletroMagnetico.kVm);
    if (!graficoKVm.ChartAreas[0].AxisX.ScaleView.IsZoomed &&
        !graficoKVm.ChartAreas[0].AxisY.ScaleView.IsZoomed &&
        !graficoKVm.ChartAreas[0].AxisY2.ScaleView.IsZoomed &&
        !graficoKVm.ChartAreas[0].AxisX2.ScaleView.IsZoomed)
    {
        while (graficoKVm.Series[0].Points.Count > 3660)
        {
            graficoKVm.Series[0].Points.RemoveAt(0);
        }
        graficoKVm.ResetAutoValues();
    }
}

因此，如果图表在任何轴上放大，它将不会重置每个轴的最小值和最大值。消除缩放问题。

图表混乱放大ResetAutoValues

2 个答案: