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LINQ:C#中XML节点的总价值
原标题:LINQ: Sum values of XML nodes in C#
  • 时间:2010-03-11 00:20:07
  •  标签:
  • c#
  • xml
  • linq

我有一份XML文件,我谨总结具体名称的所有内容。 我如何这样做?

问题回答

您可以首先使用以下代码,该编码将<代码>特定Name各项要素在文件的任何部分(Descendants)的价值汇总起来,并以具体名称收集所有内容,而不论这些内容的深度为何:

var doc = XDocument.Load("doc.xml");
var sum = (from nd in doc.Descendants("specificName")
           select Int32.Parse(nd.Value)).Sum();

或者,如果你不希望使用 que子,你可以写这样的东西:

var sum = doc.Descendants("specificName").Sum(nd => 
            Int32.Parse(nd.Value));

这些例子假定,该数值作为正文储存在要素内,是一种ger。

证明:

<nodes>
     <reading c= 1 >17</reading>
     <reading c= 2 >18</reading>
     <reading c= 3 >19</reading>
     <reading c= 4 >21</reading>
     <reading c= 5 >4</reading>
     <reading c= 6 >3</reading>
     <reading c= 7 >7</reading>
</nodes>

然后使用该代码对<代码>reading要素的数值进行总结:

public void Run()
{
    XDocument doc = XDocument.Load(fileToLoad);
    System.Console.WriteLine("
Summing:");
    var sum = doc.Element("nodes")
                 .Elements("reading")
                 .Sum(n => int.Parse(n.Value));

    Console.WriteLine("  {0}", sum);
}




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