主题：批量打印条形码

    If e.region = "SaleOrderDetail" Then
        If e.DataRow Is Nothing OrElse e.DataRow.IsNull("Lot") Then '如果是空行或者Lot列为空
            Dim img As New System.Drawing.Bitmap(1,1) '生成一个空白图片
            img.Save(ProjectPath & "Images\BarCode.gif")
        Else '否则生成条形码图片
            Dim Bar As New BarCodeBuilder
            Bar.Symbology = Barpro.Symbology.Code39
            Bar.Code = e.DataRow("Lot")
            Bar.BarRatio = 0.3
            Bar.BarHeight = 8
            bar.SaveImage(ProjectPath & "Images\BarCode.gif",300)
        End If
    End If
End If