/// <summary>

        /// 缩放

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void button6_Click(object sender, EventArgs e)

        {

            //缩放的技巧

            //首先找到待缩放的区域，例如横轴10-30，纵轴4-8

            //那么待放到的区域就是x=10;x=30;y=4;y=8;这四条线组成的矩形

            //首先确定矩形的左上角的坐标，然后确定矩形的宽和高

            try

            {

                if (tChart1 != null)

                {

                    if (tChart1.Series.Count > )

                    {

                        int x1 = Convert.ToInt32(textBox8.Text);//x轴的起始

                        int x2 = Convert.ToInt32(textBox9.Text);//x轴的结束

                        int y1 = Convert.ToInt32(textBox11.Text);

                        int y2 = Convert.ToInt32(textBox10.Text);

                        int x; int y; int height; int width; Rectangle r;

                        Series series = tChart1.Series[];

                        //单独横向

                        //xmin = series.CalcXPosValue(x1);

                        //xmax = series.CalcXPosValue(x2);

                        //ymin = series.CalcYPosValue(tChart1.Axes.Left.MinYValue);

                        //ymax = series.CalcYPosValue(tChart1.Axes.Left.MaxYValue);

                        //x = xmin;

                        //y = ymax;

                        //height = ymin - ymax;

                        //width = xmax - xmin;

                        //Console.WriteLine("x:{0},y:{1}", x, y);

                        //Console.WriteLine("width:{0},height:{1}", width, height);

                        //r = new Rectangle(x, y, width, height);//a和b代表的是矩形左上角的点的坐标

                        //tChart1.Zoom.ZoomRect(r);

                        //单独纵向

                        //ymin = series.CalcYPosValue(y1);

                        //ymax = series.CalcYPosValue(y2);

                        //xmin = series.CalcXPosValue(tChart1.Axes.Bottom.MinXValue);

                        //xmax = series.CalcXPosValue(tChart1.Axes.Bottom.MaxXValue);

                        //x = xmin;

                        //y = ymax;

                        //height = ymin - ymax;

                        //width = xmax - xmin;

                        //Console.WriteLine("x:{0},y:{1}", x, y);

                        //Console.WriteLine("width:{0},height:{1}", width, height);

                        //r = new Rectangle(x, y, width, height);

                        //tChart1.Zoom.ZoomRect(r);

                        x = series.CalcXPosValue(x1);

                        y = series.CalcYPosValue(y2);

                        width = series.CalcXPosValue(x2)-series.CalcXPosValue(x1);

                        height = series.CalcYPosValue(y1)-series.CalcYPosValue(y2);

                        r = new Rectangle(x, y, width, height);

                        tChart1.Zoom.ZoomRect(r);

                    }

                }

            }catch

            {

            }

        }