如何检查xml中是否存在节点并通过读取CDATA值返回字符串值

Question

我的字符串中包含以下 xml，并且我使用的是 c# 2.0

string strXML ="<?xml version="1.0"?>
<tcm:Error xmlns:tcm="http://www.tridion.com/ContentManager/5.0" ErrorCode="80040329" Category="17" Source="Kernel" Severity="2">
  <tcm:Line ErrorCode="80040329" Cause="false" MessageID="16137">
    <![CDATA[Unable to save Keyword (tcm:0-0-0).]]><tcm:Token>RESID_4574</tcm:Token><tcm:Token>RESID_15309</tcm:Token><tcm:Token>tcm:0-0-0</tcm:Token>
  </tcm:Line>
  <tcm:Line ErrorCode="80040329" Cause="true" MessageID="15200">
    <![CDATA[Name must be unique for items of type: Keyword within this Category and its BluePrint context. Source or sources  of conflict: tcm:236-215788-1024,tcm:237-215788-1024,tcm:241-215788-1024,tcm:243-215788-1024,tcm:423-215788-1024.]]><tcm:Token>RESID_15214</tcm:Token><tcm:Token>RESID_15309</tcm:Token><tcm:Token>RESID_15293</tcm:Token><tcm:Token>tcm:236-215788-1024,tcm:237-215788-1024,tcm:241-215788-1024,tcm:243-215788-1024,tcm:423-215788-1024</tcm:Token>
  </tcm:Line>
  <tcm:Details>
    <tcm:CallStack>
      <tcm:Location>UtilitiesBL.AssertUniqueTitle</tcm:Location>
      <tcm:Location>UtilitiesBL.AssertUniqueTitle</tcm:Location>
      <tcm:Location>KeywordBL.Create</tcm:Location>
      <tcm:Location>XMLState.Save</tcm:Location>
      <tcm:Location>Keyword.Save</tcm:Location>
    </tcm:CallStack>
  </tcm:Details>
</tcm:Error>"

现在我想写一个函数，它首先检查字符串strXML中是否有xml节点节点，如果没有这样的节点则返回“有效”，否则我的函数将返回从上面的xml中获取的字符串值。

所以我的返回结果将是“无法保存关键字 (tcm:0-0-0)。对于以下类型的项目，名称必须是唯一的：此类别中的关键字及其蓝图上下文。来源或冲突来源: tcm:236-215788-1024,tcm:237-215788-1024,tcm:241-215788-1024,tcm:243-215788-1024,tcm:423-215788-1024.”，这些文字是在 XML 中。

请推荐！！

谢谢。

MS

Answer 1

用途：

XmlDocument xml = new XmlDocument();
xml.LoadXml(strXML);

XmlNamespaceManager xmlnsManager = new XmlNamespaceManager(xml.NameTable);
xmlnsManager.AddNamespace("tcm", "http://www.tridion.com/ContentManager/5.0");

XmlNodeList res = xml.SelectNodes("//tcm:Line/text()", xmlnsManager);


foreach (XmlNode item in res)
{
    Console.WriteLine(item.InnerText);
}