Question

I have an existing List<MyObject> containing 15 MyObject(s). I want to read an XML document and map the XML document to this data.

The MyObject class has 3 public properties;

+id :int
+value1 :float
+value2 :float

The XML document has this structure;

  <root>

    <objects>
         <object id="1">
             <value1>S</value1>
             <value2>B</value2>
         </object>
         <object id="2">
             <value1>A</value1>
             <value2>J</value2>
         </object>
     </objects>
   </root>

Although the original List<MyObject> has 15 items, the incoming XML document only has 2 items, I need to maps the XML objects by id and change the List values.

so the data for XML document

object id=1, value1 = s, value2= b
object id=2, value1 = a, value2= j

and the data for the List<MyObject> items are

object id=1 value1= a, value2 = b
object id=2 value1= c, value2 = d
object id=3 value1= k, value2 = z
object id=4 value1= y, value2 = e

I need to read the XML document and merge it with the existing List<MyObject>
the result of the list should look like;

object id=1 value1= s, value2 = b
object id=2 value1= a, value2 = j
object id=3 value1= k, value2 = z
object id=4 value1= y, value2 = e

Answer 1

Try this

using System.Xml;

...

XmlDocument doc = new XmlDocument();
doc.Load("filename.xml"); //or doc.LoadXml(xmlString);
XmlNodeList objects = doc.GetElementsByTagName("object"); //get list of objects from XML

List<object> myObjects = new List<object> { new object()}; //replace this with your List<object>

for (int i = 0; i < myObjects.Count; i++)
{
    foreach (XmlNode o in objects)
    {
        if (o.Attributes["id"].Value == myObjects[i].id.ToString())
        {
            myObjects[i].Value1 = o.ChildNodes[0].InnerText;
            myObjects[i].Value2 = o.ChildNodes[1].InnerText;
        }
    }
}