XDocument Descendants()在父节点中显示所有子值 [英] XDocument Descendants() displays all child values in the parent node

问题描述

这是要使用XDocument解析的XML:

This is the XML to be parsed, using XDocument:

<e xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <FormValues />
  <Others>
    <Bank>
      <Key>FirstKey</Key>
      <Value>FirstValue</Value>
    </Bank>
    <Bank>
      <Key>SecondKey</Key>
      <Value>SecondValue</Value>
    </Bank>
    <Bank>
      <Key>ThirdKey</Key>
      <Value>ThirdValue</Value>
    </Bank>
    <Bank>
      <Key>FourthKey</Key>
      <Value>FourthValue</Value>
    </Bank>
  </Others>
  <Prob>ProbValue</Prob>
  <URL>http://example.com/</URL>
  <Method>GET</Method>
</e>

如果我这样做:

string doc = "<e xmlns:xsd..> ..... </e>";
System.Xml.Linq.XDocument docNew = System.Xml.Linq.XDocument.Parse(doc);
var elements = docNew.Root.Descendants();
@foreach (var element in elements)
{
    <label>@element.Name.ToString():</label><span>@element.Value.ToString()</span>
}

它显示:

FormValues:
Others: FirstKeyFirstValueSecondKeySecondValueThirdKeyThirdValueFourthKeyFourthValue
Bank : FirstKeyFirstValue
Key  : FirstKey
Value: FirstValue
Bank : SecondKeySecondValue
Key  : SecondKey
Value: SecondValue
Bank : ThirdKeyThirdValue
Key  : ThirdKey
Value: ThirdValue
Bank : FourthKeyFourthValue
Key  : FourthKey
Value: FourthValue
Prob : ProbValue
URL  : http://example.com/
Method:GET

我只希望键和值节点显示值.喜欢:

I only want the Key and Value Nodes to display the value. Like:

Others
Bank
Key  : FirstKey
Value: FirstValue
Bank
Key  : SecondKey
Value: SecondValue
....

推荐答案

XText 每个 XElement 所拥有的子节点直接.(这些节点拥有实际的字符数据)元素.)

XElement.Value returns a string that contains all of the text content of this element, but you want to display just the concatenated value(s) of the XText child nodes directly owned by each XElement. (These are the nodes that hold the actual character data of an element.)

这可以如下进行:

var docNew = System.Xml.Linq.XDocument.Parse(doc);
foreach (var element in docNew.Root.Descendants())
{
    var textValue = string.Concat(element.Nodes().OfType<System.Xml.Linq.XText>().Select(tx => tx.Value));
    Console.WriteLine(string.Format("{0}: {1}", element.Name.ToString(), textValue));
}

此逻辑可以提取为扩展方法:

This logic can be extracted into an extension method:

public static partial class XNodeExtensions
{
    public static string LocalValue(this XContainer node)
    {
        if (node == null)
            return null;
        return string.Concat(node.Nodes().OfType<XText>().Select(tx => tx.Value));
    }
}

并按如下方式使用:

var textValue = element.LocalValue();

它打印以下内容:

FormValues: 
Others: 
Bank: 
Key: FirstKey
Value: FirstValue
Bank: 
Key: SecondKey
Value: SecondValue
Bank: 
Key: ThirdKey
Value: ThirdValue
Bank: 
Key: FourthKey
Value: FourthValue
Prob: ProbValue
URL: http://example.com/
Method: GET

演示小提琴此处.

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