How to get values from this parameters-CodePudding

can someone help me with this xml? How i can get the value hodnota from for eg. attribute named PC0.1

<items>
  <item kod_zbozi="1010113414">
    <Parametr kod_parametru="PC0.1" hodnota="AutoCont Allegro" />
    <Parametr kod_parametru="PC4.2" hodnota="Windows 10 Pro" />
  </item>
  <item kod_zbozi="1011124131">
    <Parametr kod_parametru="PC0.1" hodnota="AutoCont OfficePro" />
    <Parametr kod_parametru="PC4.2" hodnota="Windows 10 Pro" />
  </item>
  <item kod_zbozi="1011124135">
    <Parametr kod_parametru="PC0.1" hodnota="AutoCont OfficePro" />
    <Parametr kod_parametru="PC4.2" hodnota="Windows 10 Pro" />
  </item>
  <item kod_zbozi="1011124139">
    <Parametr kod_parametru="PC0.1" hodnota="AutoCont OfficePro" />
    <Parametr kod_parametru="PC4.2" hodnota="Windows 11 Pro" />
  </item>
  <item kod_zbozi="1011124145">
    <Parametr kod_parametru="PC0.1" hodnota="AutoCont OfficePro" />
    <Parametr kod_parametru="PC4.2" hodnota="Windows 10 Pro" />
  </item>
  <item kod_zbozi="1011340128">
    <Parametr kod_parametru="PC0.1" hodnota="AutoCont OfficePro" />
    <Parametr kod_parametru="PC4.2" hodnota="Windows 10 Pro" />
  </item>
</items>

thank you

CodePudding user response：

Assume this xml string is xmlData, you can get the output like this

using System.Xml;

// ..

var output = new List<string>();

var xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xmlData);
var nodes = xmlDoc.SelectNodes("items/item/Parametr");
if (nodes != null)
    foreach (XmlNode node in nodes)
    {
        if (node.Attributes != null
            && node.Attributes["kod_parametru"]?.InnerText == "PC0.1"
            && node.Attributes["hodnota"] != null)
            result.Add(node.Attributes["hodnota"].InnerText);
    }

// output is ready (count = 6)

CodePudding user response：

You can get the output using pattern matching (i.e. Regex).. Let's say this xml string is xmlData

var output = xmlData
                .ExtractEveryStringSurrounded("kod_parametru=\"PC0.1\" hodnota=\"", "\" />");
// output is List<string>, count = 6

Where ExtractEveryStringSurrounded is an extension function

public static class StringExtensions 
{
    public static List<string> ExtractEveryStringSurrounded(this string body, string start, string end)
    {
        var results = new List<string>();
        if (string.IsNullOrEmpty(body)) return results;
        var pattern = $"{Regex.Escape(start)}(. ?){Regex.Escape(end)}";
        var r = new Regex(pattern, RegexOptions.IgnoreCase | RegexOptions.Singleline);
        foreach (Match m in r.Matches(body))
            results.Add(m.Groups[1].Value);
        return results;
    }
    
    // other extensions
}