mschart 多Y轴,设置图例位置

 private bool DrawChartImage(ChartData chartData, string chartPath)

        {

            if (chartData == null || chartData.isHasData == false)

                return false;

            int axisXInterval = 1;

            bool multiY = false;



            #region 图表横轴interval



            if (chartData.categories.Length > 0)

            {

                string category = chartData.categories[0];

                if (Regex.IsMatch(category, "^\\d{4}$"))//年统计图表

                    axisXInterval = 1;

                else

                    if (chartData.categories.Length.Equals(12) || chartData.categories.Length.Equals(15))

                        axisXInterval = 1;

                    else

                        if (chartData.categories.Length >= 28 && chartData.categories.Length <= 31 || chartData.categories.Length.Equals(34))

                            axisXInterval = 1;

                        else

                            axisXInterval = 24;

            }



            #endregion



            string chartName = chartData.name;

            multiY = chartData.units.Length > 1 && chartName.Contains("&");

            string unit = string.Empty;

            unit = chartData.units[0];

            JavaScriptSerializer jserializer = new JavaScriptSerializer();

            int seriesCount = 0;

            Chart Chart = new Chart();

            Chart.Width = 1000;

            Chart.Height = 500;

            Title title = new Title(chartName, Docking.Top, new System.Drawing.Font("Trebuchet MS", 12, System.Drawing.FontStyle.Regular), System.Drawing.Color.FromArgb(26, 59, 105));

            Chart.Titles.Add(title);

            Chart.ChartAreas.Add("ChartAreas 1");

            Chart.ChartAreas[0].AxisX.Interval = axisXInterval;

            Chart.ChartAreas[0].AxisY.IntervalAutoMode = IntervalAutoMode.VariableCount;

            Chart.ChartAreas[0].AxisY2.IntervalAutoMode = IntervalAutoMode.VariableCount;

            //Chart.ChartAreas[0].AxisX.MajorTickMark.Interval = 2;//次要辅助线间隔

            Chart.ChartAreas[0].AxisX.IntervalOffset = 0;

            //Chart.ChartAreas[0].AxisX.MinorGrid.LineWidth = 0;

            Chart.ChartAreas[0].AxisX.MajorGrid.LineWidth = 0;

            Chart.ChartAreas[0].AxisY.MajorGrid.LineWidth = 1;

            Chart.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.FromArgb(209, 208, 206);

            Chart.ChartAreas[0].AxisY2.MajorGrid.LineColor = System.Drawing.Color.FromArgb(209, 208, 206);

            Chart.ChartAreas[0].AxisY.Title = string.Format("[{0}]", unit);

            Chart.ChartAreas[0].AxisX.LabelStyle.Angle = -90;//横坐标字符倾斜角度



            #region 图例配置



            Legend legend = new Legend();

            legend.Alignment = StringAlignment.Center;

            legend.Docking = Docking.Bottom;

            legend.Name = string.Format("Legends {0}", 0);

            Chart.Legends.Add(legend);



            #endregion



            Chart.SuppressExceptions = true;

            while (seriesCount++ < chartData.series.Length)

            {



                #region 设置图表类型



                SeriesChartType seriesChartType = SeriesChartType.Column;



                string chartType = chartData.series[seriesCount - 1].type;

                if (chartType.ToLower().Equals("area"))

                    seriesChartType = SeriesChartType.Area;

                if (chartType.ToLower().Equals("line"))

                    seriesChartType = SeriesChartType.Line;

                if (chartType.ToLower().Equals("column"))

                    seriesChartType = SeriesChartType.Column;



                #endregion



                #region 设置图表颜色



                string color = chartData.series[seriesCount - 1].color;

                string r = color.Substring(1, 2);

                string g = color.Substring(3, 2);

                string b = color.Substring(5, 2);



                #endregion





                IList<KeyValuePair<string, float?>> outputData = new List<KeyValuePair<string, float?>>();

                for (int i = 0; i < chartData.categories.Length; i++)

                    outputData.Add(new KeyValuePair<string, float?>(chartData.categories[i], chartData.series[seriesCount - 1].data[i]));

                Chart.Series.Add(string.Format("Series {0}", seriesCount - 1));

                Chart.Series[seriesCount - 1].Points.DataBind(outputData, "key", "value", "");

                Chart.Series[seriesCount - 1].Color = System.Drawing.Color.FromArgb(Convert.ToInt32(r, 16), Convert.ToInt32(g, 16), Convert.ToInt32(b, 16));

                Chart.Series[seriesCount - 1].XValueType = ChartValueType.String;

                Chart.Series[seriesCount - 1].ChartType = seriesChartType;

                #region 图例



                //图例文字

                Chart.Series[seriesCount - 1].LegendText = chartData.series[seriesCount - 1].name;





                #endregion



                if (multiY)

                {

                    Chart.Series[seriesCount - 1].YAxisType = seriesCount % 2 == 1 ? AxisType.Primary : AxisType.Secondary;

                }



            }

            Chart.BorderSkin.SkinStyle = BorderSkinStyle.None;

            Chart.SaveImage(chartPath);

            return true;

        }