private void btnPreview_Click(object sender, EventArgs e)
        {
            initData();

            if (CharForm != null)
            {
                CharForm.Close();
            }


            CharForm       = new CowPriceChartForm();
            CharForm.data1 = data1;
            CharForm.data2 = data2;
            CharForm.data3 = data3;
            CharForm.data4 = data4;
            CharForm.Show();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            data1 = new Double?[12];
            data2 = new Double?[12];
            data3 = new Double?[12];
            data4 = new Double?[12];

            for (int i = 0; i < 12; i++)
            {
                if (random.Next(1000, 12000) % 12 != i)
                {
                    data1[i] = random.Next(10000, 20000);
                }

                if (random.Next(1000, 12000) % 12 != i)
                {
                    data2[i] = random.Next(10000, 20000);
                }

                if (random.Next(1000, 12000) % 12 != i)
                {
                    data3[i] = random.Next(10000, 20000);
                }

                if (random.Next(1000, 12000) % 12 != i)
                {
                    data4[i] = random.Next(10000, 20000);
                }
            }


            if (CharForm != null)
            {
                CharForm.Close();
            }


            CharForm       = new CowPriceChartForm();
            CharForm.data1 = data1;
            CharForm.data2 = data2;
            CharForm.data3 = data3;
            CharForm.data4 = data4;
            CharForm.Show();
        }