IXmlNamespaceResolver.LookupNamespace(String) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets the namespace URI mapped to the specified prefix.
public:
System::String ^ LookupNamespace(System::String ^ prefix);
public string LookupNamespace (string prefix);
public string? LookupNamespace (string prefix);
abstract member LookupNamespace : string -> string
Public Function LookupNamespace (prefix As String) As String
Parameters
- prefix
- String
The prefix whose namespace URI you wish to find.
Returns
The namespace URI that is mapped to the prefix; null
if the prefix is not mapped to a namespace URI.
Remarks
Note
Namespace URI-to-prefix mappings can change from node to node in an XML document. You cannot depend on the result of a lookup being consistent from one node to the next.
The following table describes how the default and built-in namespaces are handled by the LookupNamespace method.
Prefix | Return Value |
---|---|
xml | http://www.w3.org/XML/1998/namespace |
xmlns | http://www.w3.org/2000/xmlns/ |
String.Empty (A default namespace has been assigned). |
The currently assigned default namespace. |
String.Empty (The default namespace has not been explicitly assigned). |
String.Empty (The blank prefix is associated with elements that are not in any namespace). |
Applies to
反馈
https://aka.ms/ContentUserFeedback。
即将发布:在整个 2024 年,我们将逐步淘汰作为内容反馈机制的“GitHub 问题”,并将其取代为新的反馈系统。 有关详细信息,请参阅:提交和查看相关反馈