Question

我有一个xml文档，如下所示。

<?xml version="1.0" encoding="UTF-8"?>
<Projects>
  <Project>
        <ProjectNo>111</ProjectNo>
        <Client/>
        <Responsible/>
        <Participants/>
        <Date>13-11-2015</Date>
  </Project>
  <Transfers ID="1">
        <SampleID>1</SampleID>
        <SampleNo>222</SampleNo>
        <ChamberNo>p111</ChamberNo>
  </Transfers>
  <Transfers ID="2">
        <SampleID>2</SampleID>
        <SampleNo>32</SampleNo>
        <ChamberNo>p311</ChamberNo>
  </Transfers>
  <Transfers ID="3">
        <SampleID>3</SampleID>
        <SampleNo>42</SampleNo>
        <ChamberNo>p211</ChamberNo>
  </Transfers>
</Projects>

我正在尝试读取节点及其元素

XDocument xmlDocument = XDocument.Load(GlobalVariables.XmlPath + "\\"  + GlobalVariables.ProjectID + ".xml");

var project = from p in xmlDocument.Descendants("Project")
              select new Project
              {

                  ProjectNo = p.Element("ProjectNo").Value,
                  Client = p.Element("Client").Value,                       
                  ProjectResponsible = p.Element("Responsible").Value,
                  Participants = p.Element("Participants").Value,
                  Date = Convert.ToDateTime(p.Element("Date").Value).Date,
              };

var Samples = (from s in xmlDocument.Descendants("Transfers")
               select new Sample
               {

                   SampleID = Convert.ToInt32(s.Element("SampleID").Value),
                   SampleNo = s.Element("SampleNo").Value,
                   ChamberNo = s.Element("ChamberNo").Value,
               }

              );
int SamplesNo = Samples.Count();

CreateWordDocument(project, Samples, SamplesNo);

我能够在第一时间读取节点及其元素，但如果我在xml文件中编辑值并尝试再次读取，那么我收到错误＆＃34; NullreferenceException未处理＆＃34;对象引用未设置为对象的实例。

可能是什么问题以及如何纠正？有什么建议吗？

使用C＃中的XDocument读取节点及其元素的问题

0 个答案: