private void FormSrytalreport_Load(object sender, EventArgs e)
        {


            try
            {
                //string st = SQL.getCon();
                SqlConnection con = new SqlConnection(SQL.getCon());
                string sql = "select * from patient_cf";
                con.Open();
                SqlDataAdapter sda = new SqlDataAdapter(sql, con);
                DataSet ds = new DataSet();
                sda.Fill(ds, "patient_cf");
                CrystalReport1 crr = new CrystalReport1();
                crr.SetDataSource(ds.Tables["patienet_cf"]);
                this.crystalReportViewer1.ReportSource = crr;

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }