Question

How can add elements in an XML file in Windows Phone 7 using anything you want like (Linq or XmlWriter) I did it before in normal C# app but in Silverlight and WP7 is different.

The file is in the solution explorer folder (“files/IO.xml”), so no need to give answers about the IsolatedStorage.

My file is like this :

<?xml version="1.0" encoding="utf-8"?>
<lights>
    <light id="1" name="toto" />
    <light id="2" nom="titi" />  
</light>

Any ideas ?

Answer 1

Assuming your file is in IsolatedStorage, you can try something like this:

using (var store = IsolatedStorageFile.GetUserStoreForApplication())
{
  using (IsolatedStorageFileStream isoStore = new IsolatedStorageFileStream("IO.xml", FileMode.Open, store))
  {
    XDocument doc = XDocument.Load(isoStore);
    doc.Descendants("lights")
       .FirstOrDefault()
       .Add(new XElement("light", new XAttribute("id","3"), new XAttribute("name","tete"))

    doc.Save(isoStore);
  }
}