Edit XML file in Windows Store app

Question

I am making an app in windows store and having a problem in writing xml in created xml file. I have followed this Editing XML file in Windows Store App but it didn't work for me.

I want this xml to be wrote in my xml file on button click.

Any alternate way for this stuff..

<drink>
    <drinkImage>ck.png</drinkImage>
    <drinkTitle>COKE</drinkTitle>
    <drinkDescription>(1793-1844)</drinkDescription>
  </drink>

my current file is this:

   <?xml version="1.0" encoding="utf-8" ?>
    <drinks>
      <drink>
        <drinkImage>pepsi.png</drinkImage>
        <drinkTitle>PEPSI</drinkTitle>
        <drinkDescription>(1793-1844)</drinkDescription>
      </drink>
**<here I Want above xml on button click>**
    </drinks>

Here is what I have tried:

namespace DrinksApp
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class coke : Page
    {
        public coke()
        {
            this.InitializeComponent();

        }
        XmlDocument dom = new XmlDocument();


        private void Button_Click(object sender, RoutedEventArgs e)
        {
            this.Frame.Navigate(typeof(softdrinks));
        }

        private async void Button_Click_1(object sender, RoutedEventArgs e)
        {
               XDocument xmlDoc = XDocument.Load("favourite//fav.xml");
        xmlDoc.Root.Add(new XElement("drink",
                    new XAttribute("drinkImage","ck.png"),
                    new XAttribute("drinkTitle","PEPSI"),
                    new XAttribute("drinkDescription","NONE")

                ));



xmlDoc.Save(xmlDoc); **//This isn't working in windows store ..**
            }



        }




    }
}

I already have an xml file as mentioned above:

Answer 1

Wrote this in a console app, but it should still work for Windows Store App.

      XDocument xdoc = XDocument.Load("fa.xml");

        xdoc.Root.Add(new XElement("drink",
            new XElement("drinkImage", "Img.png"),
            new XElement("drinkTitle", "NewDrink"),
            new XElement("drinkDescription", "HelloWorld")));

        xdoc.Save("fa.xml");

Output:

<?xml version="1.0" encoding="utf-8"?>
<drinks>
  <drink>
    <drinkImage>pepsi.png</drinkImage>
    <drinkTitle>PEPSI</drinkTitle>
    <drinkDescription>(1793-1844)</drinkDescription>
  </drink>
  <drink>
    <drinkImage>Img.png</drinkImage>
    <drinkTitle>NewDrink</drinkTitle>
    <drinkDescription>HelloWorld</drinkDescription>
  </drink>
</drinks>

Your original code is very close to what you wanted. You used 'XAttribute' rather than 'XElement'. This isn't a problem but the output would have looked like this...

<drink drinkImage="ck.png" drinkTitle="PEPSI" drinkDescription="NONE" />

Your actual problem was saving. XDoucment.Save accepts a stream, text writer, xml writer, or string. In this example I used the string path. See more here: https://msdn.microsoft.com/en-us/library/system.xml.linq.xdocument(v=vs.110).aspx

EDIT: Try using a filestream:

var xmlFile = await StorageFile.GetFileFromPathAsync("fav.xml");
using (var fileStream = await xmlFile.OpenStreamForWriteAsync())
{
   xdoc.Save(fileStream);
}