FastReport 打印多张报表合并打印

private void button3_Click(object sender, EventArgs e)
{
    Report report1 = new Report();
    report1.Load(report_path + "report1.frx");
    report1.Prepare();
    report1.Load(report_path + "report2.frx");
    report1.Prepare(true);
    report1.ShowPrepared();
}

 void LoadData(Report report, string rptFile, DataTable dt_s, DataTable dt_m, DataTable dt_d, bool isFirst)
{
    report.Load(rptFile);

    //注册数据源
    report.RegisterData(dt_s, "S");
    report.RegisterData(dt_m, "M");
    report.RegisterData(dt_d, "D");

    //给DataBand数据列表绑定数据源
    DataBand dataBand1 = report.FindObject("Data1") as DataBand;
    dataBand1.DataSource = report.GetDataSource("D");

    if (isFirst)
        report.Prepare();
    else
        report.Prepare(true);


}