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c#xmlxelement

Change Xml value with XElement (with specified Attributes)

<?xml version="1.0" encoding="utf-8"?>
<Instances>
  <InstanceInfos Name="i-82c61ac1">
    <MaxTime>38</MaxTime>
  </InstanceInfos>
  <InstanceInfos Name="i-83c61ac0">
    <MaxTime>447</MaxTime>
  </InstanceInfos>
</Instances>

Hello, I am looking a way to edit a specified value with Xelement by specify the attribute (ex: i-82c61ac1).

(Actually i know how to load xml file and add Elements, but i am stuck for editing value specified by Attributs.)

for exemple i want to edit <MaxTime>38</MaxTime> but only under <InstanceInfos Name="i-82c61ac1">

Thank for your help,

Best regards.

Solution 
  • XDocument xDoc = XDocument.Load("file.xml");

        XElement result = xDoc.Descendants("InstanceInfos")
            .Where(x => x.Attribute("Name")
                .Value == "i-82c61ac1")
            .Descendants()
            .SingleOrDefault();

        result.Value = "Foo";

        xDoc.Save("file.xml");