具有命名空间前缀的Linq to XML不起作用 [英] Linq to XML with Namespace Prefix Not Working

问题描述

我一直在斯科特·艾伦(Scott Allen)的

I have been working from Scott Allen's Puralsight course on Linq Fundamentals and this linked section describes reading xml with Namespace prefixes, yet I'm not able to make this work.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<OutboundEvent
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="urn:abb.com:assetsuite:IF:Event http://apifw/devifa/xml/GeneralLedger/GeneralLedger.Publish.Event.V940.xsd"
    xmlns="urn:abb.com:assetsuite:IF:Event"
    xmlns:hdr="urn:abb.com:assetsuite:IF:Header"
    xmlns:bo="urn:abb.com:assetsuite:IF:BO"
    xmlns:boe="urn:abb.com:assetsuite:IF:IFExtension"
>
...
    <bo:BusinessObject>
    ...
    </bo:BusinessObject>
</OutboundEvent>

我应该从下面的代码中返回一个XElement，但是我没有:

I should be getting a single XElement returned from the following code, yet I am not:

var document = XDocument.Load(path);
var bo = (XNamespace)"urn:abb.com:assetsuite:IF:BO";

var businessobjects =
    from elements in document.Element("OutboundEvent")?.Elements(bo + "BusinessObject") 
        ?? Enumerable.Empty<XElement>()
    select elements;

推荐答案

OutboundEvent节点位于名称空间中，但是您的代码引用了它，好像没有.它在urn:abb.com:assetsuite:IF:Event命名空间中.

The OutboundEvent node is in a namespace but your code references it as if it wasn't. It is in the urn:abb.com:assetsuite:IF:Event namespace.

XNamespace ns = "urn:abb.com:assetsuite:IF:Event";
XNamespace bo = "urn:abb.com:assetsuite:IF:BO";
var businessObjects =
    document.Elements(ns + "OutboundEvent").Elements(bo + "BusinessObject");

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