Dim Book As New XLS.Book(ProjectPath & "Attachments\作废收购单.xls") Dim fl As String = ProjectPath & "Reports\作废收购单.xls" Book.Build() Book.Save(fl) Dim App As New MSExcel.Application Dim Wb As MSExcel.WorkBook = App.WorkBooks.Open(fl) Dim Ws As MSExcel.WorkSheet = Wb.WorkSheets(1)