xml属性名不变但不同节点的值发生变化时，如何替换xml中的属性值

Question

我有一个 xml 并且想在我找到它的任何地方替换属性值，元素名称和属性名称保持不变，但要替换的属性值取决于其当前值。

原xml:

<Loan>
<status="First">
    <report active = "True" raw_xml = "My name is abc and I am a doctor"/>
</status>
<status="Second">
    <report active = "True" raw_xml = "My name is def and I am an actor"/>  
</status>
<status="Third">
    <report active = "True" raw_xml = "My name is xyz and I am a coder"/>
</status>
</Loan>

希望输出为：

<Loan>
<status="First">
    <report active = "True" raw_xml = "My  doctor"/>
</status>
<status="Second">
    <report active = "True" raw_xml = "My  actor"/> 
</status>
<status="Third">
    <report active = "True" raw_xml = "My  coder"/>
</status>
</Loan>

我正在做一些操作来提取 raw_xml 的部分并替换它的当前值。

我有提取和替换值的代码。

但是当我使用方法 Single/Default 时它失败并出现错误

Sequence contains more than one matching element

如何通过它并循环遍历它并使用 Xdocument.descendants 替换值..我不想使用 Xpath 因为我正在处理的真实 xml 有这么多其中的内部节点并为每个属性获取 xpath 真的很难。

我用来替换的当前代码。

foreach (var report in doc.Descendants("report"))
{
    var xms = "";

    xms = report.Attribute("raw_xml").Value;

    //My code to change to extract the required attribute value goes here..creating an xmsdoc variable and storing the output value for attribute in it

    var element = doc.Descendants("report").Single(x => x.Attribute("active").Value == "True");
    element.SetAttributeValue("raw_xml", xmsdoc.ToString());
}

Answer 1

好的，我创建了一个可编译的示例：

test.xml（属性修复命名为 id）

<Loan>
  <status id="First">
    <report active = "True" raw_xml = "My name is abc and I am a doctor"/>
  </status>
  <status id="Second">
    <report active = "True" raw_xml = "My name is def and I am an actor"/>
  </status>
  <status id="Third">
    <report active = "True" raw_xml = "My name is xyz and I am a coder"/>
  </status>
</Loan>

Program.cs

using System.Xml.Linq;

namespace ConsoleApplication99
{
  class Program
  {
    static string FixXmlString(string value)
    {
      int namePos = value.IndexOf(" name ");
      if (namePos < 0) return value; // name not found
      int lastSpace = value.LastIndexOf(' ');

      int cutLength = lastSpace - namePos;

      return value.Remove(namePos, cutLength);
    }

    static void Main()
    {
      XDocument doc = XDocument.Load("test.xml");

      foreach (XElement x in doc.Descendants("report").Where(x => x.Attribute("active").Value == "True"))
      {
        var attribute = x.Attribute("raw_xml");

        if (attribute != null)
        {
          attribute.Value = FixXmlString(attribute.Value);
        }
      }

      doc.Save("new.xml");
    }

  }
}

结果 new.xml：

<Loan>
  <status id="First">
    <report active="True" raw_xml="My doctor" />
  </status>
  <status id="Second">
    <report active="True" raw_xml="My actor" />
  </status>
  <status id="Third">
    <report active="True" raw_xml="My coder" />
  </status>
</Loan>

编辑：添加缺失的"active"检查

xml属性名不变但不同节点的值发生变化时，如何替换xml中的属性值

How to replace the attribute value in xml when the attribute name remains same but value of it changes in different nodes

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