private void btnextra_Click(object sender, EventArgs e) { CapaNegocio.Reportes Reportes = new CapaNegocio.Reportes(); DataTable dtReportes = new DataTable(); dtReportes = Reportes.CargarVentasPorEntrada(Int32.Parse(txtTipoEntrada.Text)); dtgReportes.DataSource = dtReportes; }