日期:2014-05-20 浏览次数:21142 次
protected void Page_Load(object sender, System.EventArgs e) { // Populate series with random data of different scale Random random = new Random(); DateTime date = DateTime.Now.Date; for(int pointIndex = 0; pointIndex < 13; pointIndex++) { Chart1.Series["Series1"].Points.AddXY(date, random.Next(5,100)); Chart1.Series["Series2"].Points.AddXY(date, random.Next(8000, 8200)); Chart1.Series["Series3"].Points.AddXY(date, random.Next(1000,3000)); date = date.AddDays(1); } if(UseMultipleYAxis.Checked) { // Set custom chart area position Chart1.ChartAreas["ChartArea1"].Position = new ElementPosition(25,10,68,85); Chart1.ChartAreas["ChartArea1"].InnerPlotPosition = new ElementPosition(10,0,90,90); // Create extra Y axis for second and third series CreateYAxis(Chart1, Chart1.ChartAreas["ChartArea1"], Chart1.Series["Series2"], 13, 8); CreateYAxis(Chart1, Chart1.ChartAreas["ChartArea1"], Chart1.Series["Series3"], 22, 8); } } /// <summary> /// Creates Y axis for the specified series. /// </summary> /// <param name="chart">Chart control.</param> /// <param name="area">Original chart area.</param> /// <param name="series">Series.</param> /// <param name="axisOffset">New Y axis offset in relative coordinates.</param> /// <param name="labelsSize">Extar space for new Y axis labels in relative coordinates.</param> public void CreateYAxis(Chart chart, ChartArea area, Series series, float axisOffset, float labelsSize) { // Create new chart area for original series ChartArea areaSeries = chart.ChartAreas.Add("ChartArea_" + series.Name); areaSeries.BackColor = Color.Transparent; areaSeries.BorderColor = Color.Transparent; areaSeries.Position.FromRectangleF(area.Position.ToRectangleF()); areaSeries.InnerPlotPosition.FromRectangleF(area.InnerPlotPosition.ToRectangleF()); areaSeries.AxisX.MajorGrid.Enabled = false; areaSeries.AxisX.MajorTickMark.Enabled = false; areaSeries.AxisX.LabelStyle.Enabled = false; areaSeries.AxisY.MajorGrid.Enabled = false; areaSeries.AxisY.MajorTickMark.Enabled = false; areaSeries.AxisY.LabelStyle.Enabled = false; areaSeries.AxisY.IsStartedFromZero = area.AxisY.IsStartedFromZero; series.ChartArea = areaSeries.Name; // Create new chart area for axis ChartArea areaAxis = chart.ChartAreas.Add("AxisY_" + series.ChartArea); areaAxis.BackColor = Color.Transparent; areaAxis.BorderColor = Color.Transparent; areaAxis.Position.FromRectangleF(chart.ChartAreas[series.ChartArea].Position.ToRectangleF()); areaAxis.InnerPlotPosition.FromRectangleF(chart.ChartAreas[series.ChartArea].InnerPlotPosition.ToRectangleF()); // Create a copy of specified series Series seriesCopy = chart.Series.Add(series.Name + "_Copy"); seriesCopy.ChartType = series.ChartType; foreach(DataPoint point in series.Points) { seriesCopy.Points.AddXY(point.XValue, point.YValues[0]); } // Hide copied series seriesCopy.IsVisibleInLegend = false; seriesCopy.Color = Color.Transparent; seriesCopy.BorderColor = Color.Transparent; seriesCopy.ChartArea = areaAxis.Name; // Disable drid lines & tickmarks areaAxis.AxisX.LineWidth = 0; areaAxis.AxisX.MajorGrid.Enabled = false; areaAxis.AxisX.MajorTickMark.Enabled = false; areaAxis.AxisX.LabelStyle.Enabled = false; areaAxis.AxisY.MajorGrid.Enabled = false; areaAxis.AxisY.IsStartedFromZero = area.AxisY.IsStartedFromZero; areaAxis.AxisY.LabelStyle.Font = area.AxisY.LabelStyle.Font; // Adjust area position areaAxis.Position.X -= axisOffset; areaAxis.InnerPlotPosition.X += labelsSize; }