问题描述

谁能解释一下Server.MapPath("."), Server.MapPath("~"), Server.MapPath(@"") 和 Server.MapPath("/")?

Can anyone explain the difference between Server.MapPath("."), Server.MapPath("~"), Server.MapPath(@"") and Server.MapPath("/")?

推荐答案

Server.MapPath 指定映射到物理目录的相对或虚拟路径.

Server.MapPath specifies the relative or virtual path to map to a physical directory.

• Server.MapPath(".")¹ 返回正在执行的文件(例如aspx)的当前物理目录
• Server.MapPath("..") 返回父目录
• Server.MapPath("~") 返回应用程序根目录的物理路径
• Server.MapPath("/")返回域名根的物理路径(不一定和应用的根相同)

• Server.MapPath(".")¹ returns the current physical directory of the file (e.g. aspx) being executed
• Server.MapPath("..") returns the parent directory
• Server.MapPath("~") returns the physical path to the root of the application
• Server.MapPath("/") returns the physical path to the root of the domain name (is not necessarily the same as the root of the application)

一个例子:

假设您将网站应用程序 (http://www.example.com/) 指向

Let's say you pointed a web site application (http://www.example.com/) to

C:Inetpubwwwroot

并在

D:WebAppsshop

例如，如果您在以下请求中调用 Server.MapPath():

For example, if you call Server.MapPath() in following request:

http://www.example.com/shop/products/GetProduct.aspx?id=2342

然后:

• Server.MapPath(".")¹ 返回 D:WebAppsshopproducts
• Server.MapPath("..") 返回 D:WebAppsshop
• Server.MapPath("~") 返回 D:WebAppsshop
• Server.MapPath("/") 返回 C:Inetpubwwwroot
• Server.MapPath("/shop") 返回 D:WebAppsshop

• Server.MapPath(".")¹ returns D:WebAppsshopproducts
• Server.MapPath("..") returns D:WebAppsshop
• Server.MapPath("~") returns D:WebAppsshop
• Server.MapPath("/") returns C:Inetpubwwwroot
• Server.MapPath("/shop") returns D:WebAppsshop

如果 Path 以正斜杠 (/) 或反斜杠 () 开头，则 MapPath() 返回的路径为如果 Path 是完整的虚拟路径.

If Path starts with either a forward slash (/) or backward slash (), the MapPath() returns a path as if Path was a full, virtual path.

如果 Path 不以斜杠开头，则 MapPath() 返回相对于正在处理的请求的目录的路径.

If Path doesn't start with a slash, the MapPath() returns a path relative to the directory of the request being processed.

注意:在 C# 中，@ 是逐字字面字符串运算符，表示字符串应该按原样"使用，而不是针对转义序列进行处理.

Note: in C#, @ is the verbatim literal string operator meaning that the string should be used "as is" and not be processed for escape sequences.

脚注

1. Server.MapPath(null) 和 Server.MapPath("") 将 也产生这种效果.

1. Server.MapPath(null) and Server.MapPath("") will produce this effect too.

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