有没有合适的方法来创建一个 html src 路径？

Question

我知道处理文件/目录路径的正确方法是使用Path.AltDirectorySeparatorChar，但这是否适用于 html 源路径？

或者，是否反斜杠是 html 所需的路径分隔符？我一直使用反斜杠（即<img src="images\birthdaysurprise.jpg" />）来完成它，但现在我想知道我是否一直在做不正确的事情？

Answer 1

虽然我不知道法律的确切字母，但请使用正斜杠作为所有路径分隔符。甚至 Windows 也可以在其 API 中使用正斜杠作为分隔符。

使用反斜杠可能在 Windows 平台下工作，但是：

• 看起来很奇怪
• 如果您迁移到基于 *nix 的系统，将会死而复生。
• 可能最终会破坏一些假定正斜杠的代码
• \ 在许多情况下都会启动转义序列，因此 \n 可能会以意想不到的方式进行翻译。

Answer 2

“法律条文”是正斜杠 ('/') 是这样做的方式。根据RFC 2396, Uniform Resource Identifiers (URI): Generic Syntax，§3，“URI 语法组件”：

The URI syntax does not require that the scheme-specific-part have
any general structure or set of semantics which is common among all
URI.  However, a subset of URI do share a common syntax for
representing hierarchical relationships within the namespace.  This
"generic URI" syntax consists of a sequence of four main components:

   <scheme>://<authority><path>?<query>

each of which, except <scheme>, may be absent from a particular URI.
For example, some URI schemes do not allow an <authority> component,
and others do not use a <query> component.

   absoluteURI   = scheme ":" ( hier_part | opaque_part )

URI that are hierarchical in nature use the slash "/" character for
separating hierarchical components.  For some file systems, a "/"
character (used to denote the hierarchical structure of a URI) is the
delimiter used to construct a file name hierarchy, and thus the URI
path will look similar to a file pathname.  This does NOT imply that
the resource is a file or that the URI maps to an actual filesystem
pathname.

   hier_part     = ( net_path | abs_path ) [ "?" query ]

   net_path      = "//" authority [ abs_path ]

   abs_path      = "/"  path_segments

URI that do not make use of the slash "/" character for separating
hierarchical components are considered opaque by the generic URI
parser.

   opaque_part   = uric_no_slash *uric

   uric_no_slash = unreserved | escaped | ";" | "?" | ":" | "@" |
                   "&" | "=" | "+" | "$" | ","

We use the term <path> to refer to both the <abs_path> and
<opaque_part> constructs, since they are mutually exclusive for any
given URI and can be parsed as a single component.

您的 URI 需要最少数量的正斜杠来将 scheme 与 authority 分开。 URI 的其余部分（path 和 query 组件）只有在相关 scheme 和 authority。但是，有几点需要考虑：

• 一，URI paths 是 not 文件系统路径（除非 URI 方案是 file (file://...)。URI 路径只是有意义的标识符授权 可能（或可能不）映射到特定文件系统条目。

• 两个不透明的 URI 路径（不使用 '/' 作为路径分隔符的路径，不能被通用工具很好地处理。此外，所讨论的路径不一定是不透明的：意思是应用不透明 URI 的通用工具可能会导致意外行为。