how to get two table or method in reportviewer

public void bill()
      {
          try
          {
           

              ReportViewer1.LocalReport.DataSources.Clear();
              ReportViewer1.LocalReport.DataSources.Add(new ReportDataSource("DataSet1", DateWiseServiceData()));
              
              ReportViewer1.LocalReport.ReportPath = HttpContext.Current.Server.MapPath("~/Admin/Report/Jobcard.rdlc");
            //  ReportViewer1.LocalReport.Refresh();
              //Button1.Visible = true;

          }
          catch (Exception objException)
          {
              //ExceptionManager.ShowException(objException, this.ToString(), MethodInfo.GetCurrentMethod().Name);
              //objException = null;
          }
          finally
          {

          }

 private DataTable DateWiseServiceData()
        {
            try
            {
                if (conn.State == ConnectionState.Open)
                    conn.Close();
                conn.Open();
                //string startDate = txtStartDate.Text;

                //startDate = startDate + " 00:00";
                //string endDate = txtEndDate.Text;
                //endDate = endDate + " 23:59";
                // Create a Command  
               
                 
                SqlDataAdapter SqlDa = new SqlDataAdapter( "select jobcard_creation.jobcard_no,jobcard_creation.vehicle_no,jobcard_creation.vehicle_model,jobcard_creation.date, jobcard_staff.staff_name, "
                     + "  jobcard_creation.delivery_date,jobcard_creation.total_days,vehicle_type.vehicle_name,Job_type.jobtype_name from jobcard_creation "
                    + " left outer join vehicle_type on jobcard_creation.department_id=vehicle_type.vehicle_id   left outer join Job_type on job_type.jobtype_id=jobcard_creation.job_type  "
                    + " left join jobcard_staff on jobcard_staff.jobcard_id=jobcard_creation.jobcard_id  where "
                    + " jobcard_creation.jobcard_id='" + txtJobCardId.Text + "' and jobcard_creation.type='N' and jobcard_staff.type='N' ", conn);



               //SqlDataAdapter SqlDa1 = new SqlDataAdapter("select isnull(describtion,'') as describtion from jobcard_work_description where jobcard_id='" + txtJobCardId.Text + "' ",conn);
              
                DataSet1.jobcardDataTable InvoiceBill = new DataSet1.jobcardDataTable();
                //DataSet1.InvoiceDataTable InvoiceBill = new DataSet1.InvoiceDataTable();
                //DataSet1.Jobcard1DataTable InvoiceBill = new DataSet1.Jobcard1DataTable();
               

              
               
                //SqlDa1.Fill(dtble1);
                

               


                SqlDa.Fill(InvoiceBill);
              //  SqlDa1.Fill(InvoiceBill);
                return InvoiceBill;

                // SqlCommand SqlComm1 = new SqlCommand();
                //SqlComm1.Connection = conn;
                //SqlComm1.CommandType = CommandType.Text;
                //SqlComm1.CommandText = "select describtion from jobcard_work_description where jobcard_id='" + txtJobCardId.Text + "'";
                //DataSet1.InvoiceDataTable InvoiceBill1 = new DataSet1.InvoiceDataTable();
                //SqlDataAdapter SqlDa1 = new SqlDataAdapter(SqlComm);
                //SqlDa1.Fill(InvoiceBill1); // Fill Data in NorthwindDataSet Object.  

                //return InvoiceBill1;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }