使用下面的代码,我可以在我的Xml中接收所有<job>
元素。但是,当我尝试搜索名为<Name>
且其文本等于"receiverjob"
的子项的作业时,即使作业存在,SelectNodes()
方法也会返回零。无法获取包含特定文本的特定类型的子节点
XmlDocument dom = new XmlDocument();
dom.Load(textBoxFilePath.Text);
XmlNamespaceManager nsManager = new XmlNamespaceManager(dom.NameTable);
nsManager.AddNamespace("d", "http://quartznet.sourceforge.net/JobSchedulingData");
XmlNodeList jobElements = dom.DocumentElement.SelectNodes("descendant::d:job[name=receiverjob]", nsManager);
的Xml:
<?xml version="1.0" encoding="UTF-8"?>
<!-- This file contains job definitions in schema version 2.0 format -->
<job-scheduling-data version="2.0" xmlns="http://quartznet.sourceforge.net/JobSchedulingData" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<processing-directives>
<overwrite-existing-data>true</overwrite-existing-data>
</processing-directives>
<schedule>
<job>
<name>receiverjob</name>
<group>receivergroup</group>
<job-type>Quartz.Server.ArgumentReceiverJob, Quartz.Server</job-type>
<job-data-map>
<entry>
<key>receivedargument</key>
<value>hamburger</value>
</entry>
</job-data-map>
</job>
<trigger>
<simple>
<name>argumentreceiverJobTrigger</name>
<group>argumentreceiverGroup</group>
<description>Simple trigger to simply fire sample job</description>
<job-name>receiverjob</job-name>
<job-group>receivergroup</job-group>
<misfire-instruction>SmartPolicy</misfire-instruction>
<repeat-count>-1</repeat-count>
<repeat-interval>10000</repeat-interval>
</simple>
</trigger>
<job>
<name>batchjob</name>
<group>batchGroup</group>
<job-type>Quartz.Server.BatchJob, Quartz.Server</job-type>
<durable>true</durable>
<recover>false</recover>
</job>
<trigger>
<cron>
<name>Trigger2</name>
<group>DEFAULT</group>
<job-name>batchjob</job-name>
<job-group>batchGroup</job-group>
<cron-expression>0/15 * * * * ?</cron-expression>
</cron>
</trigger>
<job>
<name>jobnamexxx</name>
</job>
<job>
<name>jobnamexxx</name>
</job>
<job>
<name>jobnamexxx</name>
</job>
</schedule>
</job-scheduling-data>
谢谢!你的XPath工作。我仍然不知道为什么我要在任何地方都提到这个前缀。我真的需要学习LINQ to XML,但上周我花了一些时间学习XPath,如果它通过编写一行代码来返回查询结果,那么我认为它是值得的。但是你是对的,我应该在LINQ中更好地自己。 – Disasterkid 2014-10-06 08:30:59
@Pedram:前缀用于指定您希望该名称空间中的元素......它是由于XML中的名称空间继承而引起的。请注意,我提出的四条线完全取代了您提交的五条线......如果您想将查询放在一条线上,也可以这样做......我只是认为这种方式更具可读性:) – 2014-10-06 08:32:36
很难不同意你的看法。 – Disasterkid 2014-10-06 08:35:26