1. in ASP.NET, you need to use an absolute path or use Server.MapPath2. also seeINFO: Considerations for Server-Side Automation of Office
http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q257757
http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q257757
是因为在取系统路径的时候“/”和“\”的问题。