Chart折线图 支持图表区放大缩小数据

			Random rd = new Random();
            int[] RandomNumber = new int[1000];

            for (int i = 0; i < 1000; i++)
            {
                RandomNumber[i] = rd.Next(1, 100);
            }


            // 设置曲线的样式
            Series series = chart1.Series[0];
            // 画样条曲线（Spline）
            series.ChartType = SeriesChartType.Line;
            // 线宽2个像素
            series.BorderWidth = 2;
            // 线的颜色：红色
            series.Color = System.Drawing.Color.Blue;
            // 图示上的文字
            series.LegendText = "演示曲线";
            
            //
            series.IsVisibleInLegend = false;

            //设置点样式
            series.MarkerStyle = MarkerStyle.Circle;
            

            

            //设置显示示数
            //series.IsValueShownAsLabel = true;
            //鼠标移动到对应点显示数值
            series.ToolTip = "#VAL";     
            // 准备数据
            float[] values = { 95, 30, 20, 23, 60, 87, 42, 77, 92, 51, 29 };

            // 在chart中显示数据
            int x = 1;
            foreach (float v in RandomNumber)
            {
                series.Points.AddXY(x, v);
                x++;
            }

            // 设置显示范围
            ChartArea chartArea = chart1.ChartAreas[0];
            chartArea.AxisX.Minimum = 0;
            chartArea.AxisX.Maximum = 1000;
            chartArea.AxisY.Minimum = 0d;
            chartArea.AxisY.Maximum = 100d;
            chartArea.AxisY.Interval = 25;
            chartArea.AxisX.Interval = 100;

            //删除或添加 坚游标(竖红线) 属性
            chartArea.CursorX.IsUserEnabled = false;
            //选中图表区范围(放大)
            chartArea.CursorX.IsUserSelectionEnabled = true;
            //轴显示角度
            chartArea.AxisX.LabelStyle.Angle = 90;