主题：报表生成的问题

Dim wbr As WinForm.WebBrowser = e.Form.Controls("WebBrowser1")
Dim tmp As String = ProjectPath & "Attachments\订单清单.xls"
Dim rpt As String = "d:/订单/"+ e.DataRow("所属年份")+ e.DataRow("所属月份")+"订单清单.pdf"
Dim Book As New XLS.Book(tmp)
Book.Build()
Book.SaveToPDF(rpt) '保存为pdf文件
wbr.AddRess = rpt

此主题相关图片如下：qq拼音截图未命名.jpg

表名为“A表”在窗口的“生成报表”按钮里写的
我想把文件按照e.DataRow("所属年份")+ e.DataRow("所属月份")重命名并保存到D盘的订单文件夹里，请问怎么搞

Dim wbr As WinForm.WebBrowser = e.Form.Controls("WebBrowser1")
Dim tmp As String = ProjectPath & "Attachments\订单清单.xls"
Dim tmp1 As String = ProjectPath & "Attachments\订单接口报表.xls"
Dim rpt1 As String = "d:/订单/"+(Tables("订单报表").Current("所属年份")) + (Tables("订单报表").Current("所属月份"))   +"01.xls"
Dim rpt As String = "d:/订单/"+(Tables("订单报表").Current("所属年份")) + (Tables("订单报表").Current("所属月份"))   +"订单清单.pdf"
Dim Book As New XLS.Book(tmp)
Dim Book1 As New XLS.Book(tmp1)
Book.Build()
Book1.Build()
Book1.Save(rpt1)‘保存为pdf文件
Book.SaveToPDF(rpt) '保存为pdf文件
wbr.AddRess = rpt

能不能加一个IF啊，我想在保存以上2个文件是，检查这个文件是否已经存在，如果已存在就只显示，不保存