private void Impresion_Load(object sender, EventArgs e)
{
DataTable dt = new DataTable();
ConexionGeneral CG = new ConexionGeneral();
dt = CG.ImprimirFactura(facturaID);
reportViewer1.LocalReport.DataSources.Clear();
ReportDataSource rp = new ReportDataSource("DataSet1", dt);
reportViewer1.LocalReport.DataSources.Add(rp);
this.reportViewer1.RefreshReport();
}