Server.MapPath(“.")、Server.MapPath(“~")、Server.MapPath(@“")、Server.MapPath(“/").有什么不同? [英] Server.MapPath("."), Server.MapPath("~"), Server.MapPath(@""), Server.MapPath("/"). What is the difference?

问题描述

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

解决方案

Server.MapPath 指定将映射到物理目录的相对或虚拟路径.

• 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(不一定与应用的根相同)

示例:

假设您将一个网站应用程序 (http://www.example.com/) 指向

C:Inetpubwwwroot

并在

中安装您的商店应用程序(子网站作为IIS中的虚拟目录，标记为应用程序)

D:WebAppsshop

例如，如果您在以下请求中调用 Server.MapPath():

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

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

如果 Path 不以斜杠开头，MapPath() 将返回一个相对于正在处理的请求的目录的路径.

注意:在 C# 中，@ 是逐字文本字符串运算符，这意味着该字符串应该按原样"使用，而不是针对转义序列进行处理.>

脚注

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

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

解决方案

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

• 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)

An example:

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

C:Inetpubwwwroot

and installed your shop application (sub web as virtual directory in IIS, marked as application) in

D:WebAppsshop

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

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

then:

• 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

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

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

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.

Footnotes

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

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