private void Frm_Report_Load(object sender, EventArgs e)
        {
            rptMental.ProcessingMode = ProcessingMode.Local;
            rptMental.LocalReport.ReportEmbeddedResource = @"Record.Client.Report.chic_Report.rdlc";
            rptMental.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(LocalReport_SubreportProcessing);
            rptMental.LocalReport.DataSources.Add(new ReportDataSource("Ds1_chic_Report", dtchic));
            this.rptMental.RefreshReport();
        }

        void LocalReport_SubreportProcessing(object sender, SubreportProcessingEventArgs e)
        {
            ReportDataSource rs = new ReportDataSource();
            rs.Name = "Ds1_chicDetail_Report";
            rs.Value = dtchicDetail;
            e.DataSources.Add(rs);
        }

            ReportDataSource rs= new ReportDataSource(); 
            rs.Name = "Ds1_chicDetail_Report";
            rs.Value = dtchicDetail;
            rptMental.LocalReport.DataSources.Clear();
            rptMental.LocalReport.DataSources.Add(rs);