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[b]server.mappath(path)[br][/b] the [b]mappath[/b] method maps the specified relative or virtual path to the corresponding physical directory on the server.[br]parameters (msdn:[url=ms-help://ms.msdnqtr.2003feb.2052/iisref/htm/ref_vbom_serommp.htm]ms-help://ms.msdnqtr.2003feb.2052/iisref/htm/ref_vbom_serommp.htm[/url])[br]用法：[br]1.server.mappath("/") 應用程序根目錄所在的位置 如 c:\inetpub\wwwroot\[br]2.server.mappath("./") 表示所在頁面的當前目錄 [br] 注：等價于server.mappath("") 返回 server.mappath("")所在頁面的物理文件路徑[br]3.server.mappath("../")表示上一級目錄 [br]4.server.mappath("~/")表示當前應用級程序的目錄，如果是根目錄，就是根目錄，如果是虛擬目錄，就是虛擬目錄所在的位置 如：c:\inetpub\wwwroot\example\[br]注：等效于server.mappath("~")。[br][br]不知道是否正確，研究中......[br]另：以下幾句等效[br]string filename=server.mappath("./") + @"\web.config";[br]string filename=server.mappath("./") + "/web.config";[br]string filename=server.mappath("") + @"\web.config"[br][br]附一例子：修改web.config的某一節點的屬性值[br]
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