VB.NET創建并下載Excel;

Private Sub PrintExcel()
        Dim time As String = DateTime.Now.ToString("yyyyMMddHHmmss")

        Dim xlApp As Microsoft.Office.Interop.Excel.Application
        Dim xlBook As Microsoft.Office.Interop.Excel.Workbook
        Dim xlSheet As Microsoft.Office.Interop.Excel.Worksheet

        xlApp = CreateObject("Excel.Application")
        xlBook = xlApp.Workbooks.Add
        xlSheet = xlBook.Worksheets(1)
        xlSheet.Activate()

        xlBook.SaveAs(Server.MapPath("\TmpReport\tmp" & time & "1.xls"))

        xlBook.Close()
        xlApp.Quit()

        xlApp = Nothing
        xlBook = Nothing
        xlSheet = Nothing

        Response.Expires = 0
        Response.Clear()
        Response.Buffer = True
        Response.Charset = "utf-8"
        'Response.ContentEncoding = System.Text.Encoding.UTF8
        Response.ContentEncoding = System.Text.Encoding.Unicode
        Response.ContentType = "application/vnd.ms-excel"
        Response.AddHeader("Content-Disposition", "attachment; filename=" & HttpUtility.UrlEncode(time & ".xls"))
        Response.WriteFile(Server.MapPath("\TmpReport\tmp" & time & "1.xls"))
        Response.Flush()
        Response.Clear()
    End Sub

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有什麽辦法解決！求指教！！ VB Excel

补充：VB ,  网络编程