How to add new XML element with a particular attribute name inside with an element in C#

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I have below xml file and i want to add new data to a particular element with name TES and

<product ip="3,4,4,4,4" op="33" />

<?xml version="1.0" encoding="utf-8"?>
<root>
  <Brand name="TES">
   
    <product ip="40,67, 0,0,0" op="0" />
    <product ip="49,25, 4,4,0" op="0" />
    <product ip="40,5, 3,64,0" op="0" />
    <product ip="85,27, 6,6,0" op="0" />
    <product ip="8,27, 6,6,0 " op="0" />
    <product ip="23,5, 4,1,0" op="0" />
    <product ip="26,25,0,33,10" op="0" />
    <product ip="100,0,0,0,0" op="0" />
  </Brand>
  <Brand name="SW">
    <product ip="0, 1, 0,0,0" op="1" />
    <product ip="0, 100,0,0,0" op="1" />
    <product ip="0, 25,0,75,0" op="1" />
    <product ip="0, 25,0,75,0" op="1" />
    <product ip="0, 35,0,55,0 " op="1" />
    <product ip="42, 43,0,82,6" op="1" />
    <product ip="24, 7,1,17,0" op="1" />
  </Brand>
</root>

What I have tried:

i had tried below c# but it only add attributes to first existing element

C#

XElement root = XElement.Load("sample.xml");
            root.Element("Brand").Element("product").Add( new XAttribute("IP", "3,4,4,4,4"),new XAttribute("OP", "33"));
            root.Save("output.xml");

Posted 20-Jun-18 20:49pm

vishnulalr

Updated 21-Jun-18 0:35am

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Comments

Eric Lynch 21-Jun-18 6:11am

Not clear what you are trying to do here. Your code is doing to you have asked it to. Which of the following are you trying to do?

Are you trying to add a new "product" element to "Brand"? -OR-
Are you trying to add new "ip"/"op" attributes to a specific "product" element within "Brand"? If so, which one? Currently, you are adding to the first one. -OR-
Are you trying to add additional values to the existing "ip"/"op" attributes (e.g. before: ip=1,2,3 / after: ip=1,2,3,4,5,6)?

The easiest way to ask is probably to show a small before XML document and after XML document for what you want to do.

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Eric Lynch · Answer 1 · 2018-06-21T00:36:00

Taking a guess here, because its not quite what you are asking, but are you trying to do this...

XElement element = root
  .Elements("Brand")
  .Where(e => e.Attribute("name").Value == "TES")
  .Single();

element.Add(
  new XElement("product",
    new XAttribute("ip", "3,4,4,4,4"),
    new XAttribute("op", "33")));

If not, I'd provide two small XML documents: a BEFORE document and an AFTER document, showing what you want to do (as I suggested in the comments).