是否在Java的URIResolver概念在C＃和.NET的存在吗？ [英] Does the Java URIResolver concept exist in C# and .NET?

问题描述

在爪哇XML转换包，有被称为一个的的URIResolver ，这是实现此接口，可以由处理器调用把一个URI用于文档（），XSL的对象：进口，或XSL：包括成源对象。

In the Java XML transformation package, there is a concept known as a URIResolver, which is "An object that implements this interface that can be called by the processor to turn a URI used in document(), xsl:import, or xsl:include into a Source object."

所以，如果您的XSL有一个这样的进口

So, if your XSL has an import like this

<xsl:import href="URI"/>

这可以让你把URI和其映射到的您所选择的来源 - 也许它来自于一个数据库，或者您想要映射的URI与另一个URI。这可能是有用的，因为你不能使用的xsl：在 XSL变量：进口HREF

This allows you to take URI and map it to the Source of your choice - maybe it comes from a database, or maybe you want to map the URI to another URI. This can be useful, since you can't use an xsl:variable in the xsl:import href.

下面是一些示例的Java code，创建一个变压器做了改变。

Here is some sample Java code that creates a transformer and does a transform.

URIResolver uriResolver = new MyURIResolver();  // sample
TransformerFactory transformerFactory = TransformerFactory.newInstance();
transformerFactory.setURIResolver(uriResolver);
Transformer transformer = transformerFactory.newTransformer();
transformer.setURIResolver(uriResolver);
transformer.transform(xml, result);

请注意，有两个地方在code，其中的URIResolver使用：

Note, there are two places in the code where the URIResolver is used:

• 的TransformerFactory <一href="http://java.sun.com/webservices/docs/1.6/api/javax/xml/transform/TransformerFactory.html#setURIResolver%28javax.xml.transform.URIResolver%29"相对=nofollow> setURIResolver - 设置对象 期间所使用的默认 转型要解决的URI使用 文件（），XSL：进口，或 XSL：包括
。
• 变压器<一href="http://java.sun.com/webservices/docs/1.6/api/javax/xml/transform/Transformer.html#setURIResolver%28javax.xml.transform.URIResolver%29"相对=nofollow> setURIResolver - 设置 一个对象，将用于 解决文档（）中使用的URI。

• TransformerFactory setURIResolver - "Set an object that is used by default during the transformation to resolve URIs used in document(), xsl:import, or xsl:include."
• Transformer setURIResolver - "Set an object that will be used to resolve URIs used in document()."

问题：是否有类似的概念到Java的URIResolver在C＃和.NET

Question: Is there a similar concept to the Java URIResolver in C# and .NET?

推荐答案

是的，这就是所谓的 的XmlResolver 。

Yes, it's called XmlResolver.

的XmlResolver 是的System.Xml 抽象之一，这意味着你可以在不同的API，如用它 XslCompiledTransform ，的XmlDocument ，的XmlReader （通过 XmlReaderSettings ），等等。

XmlResolver is one of System.Xml abstractions, which means you can use it in various APIs, such as XslCompiledTransform, XmlDocument, XmlReader (via XmlReaderSettings), etc.

下面是它是如何工作的更深入，以及如何实施你自己的解析器。

Here's a more in-depth on how it works, and how you can implement your own resolver.

在默认情况下，这些不同的API使用 XmlUrlResolver ，它可以解决开始的URI 的http：// 和文件：// 。

By default, these various APIs use the XmlUrlResolver, which can resolve URIs that start with http:// and file://.

此外，为解决外部实体，可以覆盖默认的<一个href="https://msdn.microsoft.com/en-us/library/system.xml.xmlreader.resolveentity%28v=vs.110%29.aspx"相对=nofollow> ResolveEntity 方法上 的XmlReader 。

In addition, for resolving external entities, you can override the default ResolveEntity method on XmlReader.

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