Sending Parameters to crystal reports

Question

My Code Fallows  like this.

 ReportDocument cryRpt = new ReportDocument();

            ParameterField paramField = new ParameterField();

          

            ParameterDiscreteValue dis = new ParameterDiscreteValue();

            this.WindowState = FormWindowState.Maximized;

            conn.ConnectionString = connectionstring.get_string(connectionstring.GetsqlName());

            balreport bs = new balreport();

            BalDatasetTableAdapters.tbl_Balence_Sheet_1TableAdapter ta = new Reports.BalDatasetTableAdapters.tbl_Balence_Sheet_1TableAdapter();

            BalDataset.tbl_Balence_Sheet_1DataTable table = ta.GetData();

          //  bs.SetParameterValue("@Socname", socname);

           // bs.ParameterFields.Add(paramField);

           

            paramField.ParameterFieldName = "@Socname";

            dis.Value = socname;

            paramField.CurrentValues.Add(dis);

            //bs.SetParameterValue("@From_date", fromdate);

            //bs.SetParameterValue("@To_date", todate);

            bs.SetDataSource(table.DefaultView);

            crystalReportViewer1.ReportSource = bs;

            crystalReportViewer1.Refresh();

Thanks in Advance.....