[英]c# XML read: read of nodes with same node name
我在下面的XML中具有更多的“字符串”节点(字符串节点的数量由工具定义-向其中添加了几种语言),我使用system.xml
将每个节点保存为字符串,如以下代码所示:
是否可以将每个“字符串”的InnerText
保存到数组? 我也尝试了下面的代码(for循环),但是不知道如何定义循环数(stringnumber)。 任何意见,将不胜感激。
valid = TBElement.GetElementsByTagName("Valid")[0].InnerText;
for (int b = 0; b == stringnumber; b++)
{
languages[b] = TBElement.GetElementsByTagName("Languages/string")[0].InnerText;
}
这是XML:
<ArrayOfGlobalInfo>
<GlobalInfo>
<NumberOfEntries>2</NumberOfEntries>
<LanguageNewDefaultOptions />
<Languages>
<string>eng</string>
<string>ger</string>
<string>ita</string>
<string>fre</string>
</Languages>
<Valid>true</Valid>
</GlobalInfo>
</ArrayOfGlobalInfo>
循环数可以从下面找到
TBElement.GetElementsByTagName("Languages/string").Count()
只需将其存储在变量中并在循环条件下使用
var stringnumber = TBElement.GetElementsByTagName("Languages/string").Count()
您可以按照以下方式操作:
XDocument xdoc = XDocument.Load("YourXMLFile");
XmlNodeList elemList = xdoc.GetElementsByTagName("string");
for (int i = 0; i < elemList.Count; i++)
{
Console.WriteLine(elemList[i].InnerText);
}
另一个解决方案是这样的:
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("Your file path");
XmlNodeList dataNodes = xmlDoc.SelectNodes("/ArrayOfGlobalInfo/GlobalInfo/Languages/string");
foreach (XmlNode node in dataNodes)
{
//Your code goes here
}
尝试这个:
var stringElements = TBElement.GetElementsByTagName("Languages/string");
List<string> languages = new List<string>();
foreach (var element in stringElements)
languages.Add(element.InnerText);
如果您更喜欢数组:
var stringElements = TBElement.GetElementsByTagName("Languages/string");
string[] languages = new string[stringElements.Count];
for (int i = 0; i != stringElements.Count; ++i)
languages[i] = stringElements[i].InnerText;
在一条指令中使用XML Linq做到这一点
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication49
{
class Program
{
const string FILENAME = @"c:\temp\test.xml";
static void Main(string[] args)
{
XDocument doc = XDocument.Load(FILENAME);
string[] languages = doc.Descendants("string").Select(x => (string)x).ToArray();
}
}
}
您问题的直接答案是这样做:
xmlNodeList.Cast<XmlNode>().Select(n => n.InnerText).ToArray();
...其中xmlNodeList是您在GetElementsByTagName()中成功评估的XPath表达式的结果。
但您可能会考虑:
这说明了您的一些选择:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Linq;
namespace _43387906
{
class Program
{
private static string _xml = "<ArrayOfGlobalInfo>\r\n <GlobalInfo>\r\n <NumberOfEntries>2</NumberOfEntries>\r\n <LanguageNewDefaultOptions />\r\n <Languages>\r\n <string>eng</string>\r\n <string>ger</string>\r\n <string>ita</string>\r\n <string>fre</string>\r\n </Languages>\r\n <Valid>true</Valid>\r\n </GlobalInfo>\r\n</ArrayOfGlobalInfo>";
static void Main(string[] args)
{
try
{
var xDocument = XDocument.Parse(_xml);
UseXDocumentVerbose(xDocument);
UseXDocumentShorter(xDocument);
var xmlDocument = new XmlDocument();
xmlDocument.LoadXml(_xml);
UseXmlDocument(xmlDocument);
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
Console.ReadLine();
}
private static void UseXmlDocument(XmlDocument xmlDocument)
{
var languages = xmlDocument.SelectNodes("ArrayOfGlobalInfo/GlobalInfo/Languages/string");
//You can use languages.Count without converting to an array
for (int i = 0; i < languages.Count; i++)
{
Console.WriteLine(languages[i].InnerText);
}
//The trick is to use Cast<T>() and ToArray()
var languagesArray = languages.Cast<XmlNode>().Select(n => n.InnerText).ToArray();
for (int i = 0; i < languagesArray.Length; i++)
{
Console.WriteLine(languagesArray[i]);
}
}
private static void UseXDocumentShorter(XDocument xDocument)
{
if (xDocument.Root.Name != "ArrayOfGlobalInfo")
throw new Exception("Root isn't ArrayOfGlobalInfo");
var languages = xDocument.Root
.Elements("GlobalInfo")
.SelectMany(i => i.Elements("Languages"))
.SelectMany(l => l.Elements("string"))
.Select(s => s.Value).Where(s => !string.IsNullOrWhiteSpace(s))
.ToArray();
for (int i = 0; i < languages.Length; i++)
{
Console.WriteLine(languages[i]);
}
}
private static void UseXDocumentVerbose(XDocument xDocument)
{
if (xDocument.Root.Name != "ArrayOfGlobalInfo")
throw new Exception("Root isn't ArrayOfGlobalInfo");
var globalInfoElements = xDocument.Root.Elements("GlobalInfo");
var languageElements = globalInfoElements.SelectMany(i => i.Elements("Languages"));
var languages = languageElements.SelectMany(l => l.Elements("string")).Select(s => s.Value).Where(s => !string.IsNullOrWhiteSpace(s)).ToArray();
for (int i = 0; i < languages.Length; i++)
{
Console.WriteLine(languages[i]);
}
}
}
}
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