如何计算文本文件的出现次数 [英] How to count the occurence of the text file

问题描述

<Books Type="Science">

</Books>

<Books Type="Story"> 

</Books>

<Books Type="History">

</Books>

这是一个示例文本文件。

在这里，我想计算节点的出现次数，例如Type =Science，Story。



如何使用txt文件中的文本读取

This is a sample text file.
Here I want to count the number of occurrence of the nodes such as Type="Science" ,"Story".

How to do using text reading from txt file

推荐答案

您应该使用XPATH执行此操作（您可以在MSDN或Google上搜索XPATH）：

You should use XPATH for doing this (you could search on MSDN or Google about XPATH):

string expresion= "/Books[@Type='Science' or @Type='Story']"; //XPATH expression!

XmlDocument xml = new XmlDocument();
xml.LoadXml(filePath); //Your file path!
XmlNodeList nodeList = xml.SelectNodes(expresion);
int n = nodeList.Count;

您可以使用以下代码：< br $>

You can use below code:

XDocument doc = XDocument.Load(@"C:\XMLFile1.xml");
var query = from ele in doc.Descendants("Books")
            where ele.Attribute("Type").Value == "Science"
            select ele;
Console.WriteLine( query.Count());
Console.Read();

这可以解决您的问题。



谢谢

This should solve your problem.

Thanks

由于这看起来像XML，我建议使用.NET中已经存在的XML读取和分析功能。

看看

LINQ to XML [ ^ ]

和

System.Xml.Linq命名空间 [ ^ ]

Since this looks like XML, I'd suggest using the XML reading and analysis capabilities already present in .NET.
Look at
LINQ to XML[^]
and
System.Xml.Linq namespace[^]

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