使用C＃打印CrystalReportViewer文档

Question

我想打印CrystalReportViewer中显示的报告。我使用此代码在CrystalReportViewer中预览报表：

private void previewButton_Click(object sender, EventArgs e)
{
    string sql1 = "SELECT * FROM SousCategorie WHERE Stock > 0";
    SqlCommand cmd1 = new SqlCommand(sql1, con);
    SqlDataAdapter dscmd1 = new SqlDataAdapter(cmd1);
    DataSet ds1 = new DataSet();
    dscmd1.Fill(ds1, "SousCategorie");
    CrystalReport5 objRpt2 = new CrystalReport5();
    objRpt2.SetDataSource(ds1);
    crystalReportViewer5.ReportSource = objRpt2;
    crystalReportViewer5.Refresh();
}

我使用此代码打印CrystalReportViewer中预览的报告：

private void printButton_Click(object sender, EventArgs e)
{
    CrystalReport5 objRpt4 = new CrystalReport5();
    objRpt4.PrintOptions.PaperOrientation = PaperOrientation.Portrait;
    objRpt4.PrintOptions.PaperSize = PaperSize.PaperA4;
    objRpt4.PrintToPrinter(1, false, 0, 0);
}

但是我打印了一份空白报告。如何打印报告，如CrystalReportViewer工具栏中存在的打印按钮？