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?
What is the use of default keyword in C#? Is it introduced in C# 3.0 ?
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?
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);
}
What is the use of default keyword in C#? Is it introduced in C# 3.0 ?
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