Loading data from an XML (WPF)

Question

At the minute I am loading the data directly from my xaml.cs file, but I want to now get it to load from an XML file as I have no current knowledge on how to do this I was wondering if people could help me out, these are my current files:

enter code here


        //Create a viewmodel and add some data to it. 
        var viewModel = new MyViewModel();
        viewModel.Items.Add(new Data() { Name = "Yes", Type = "Yes", Selected = true });
        viewModel.Items.Add(new Data() { Name = "Yes", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "No", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "Yes", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "No", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "No", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "No", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "No", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "No", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "Unknown", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "Yes", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "Yes", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "No", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "Yes", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "No", Type = "No", Selected = true });
        viewModel.Items.Add(new Data() { Name = "No", Type = "No", Selected = true });

        //Set the window's datacontext to the ViewModel.  This will make binding work. 
        this.DataContext = viewModel;

    }
}

//This is the ViewModel used to bind data
public class MyViewModel
{
    //This could just be a List<Data> but ObservableCollection<T> will automatically 
    //update UI when items are added or removed from the collection. 
    public ObservableCollection<Data> Items { get; set; }

    public MyViewModel()
    {
        Items = new ObservableCollection<Data>();
    }
}

//Just a sample class to hold the data for the grid. 
//This is the class that is contained in the ObservableColleciton in the ViewModel 
public class Data
{
    public string Name { get; set; }
    public string Type { get; set; }
    public bool Selected { get; set; }
}


//This is an example converter.  It looks to see if the element is set to "Yes"  
//If so, it returns Visibility.Collapsed.  Otherwise, it returns Visibility.Visible. 
public class YesToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value != null && value is string)
        {
            var input = (string)value;
            if (string.Equals(input, "Yes", StringComparison.CurrentCultureIgnoreCase))
            {
                return Visibility.Collapsed;
            }
            else
            {
                return Visibility.Visible;
            }
        }

        return Visibility.Visible;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

}

Please search Google / StackOverflow before posting very common questions like these... stackoverflow.com/questions/8972743/… — Vinit Sankhe
– Vinit Sankhe, Commented May 16, 2012 at 13:12
I would start by looking into MSDN, and checking out topics related to XML, XLinq, XML Serialization. HTH. — code4life
– code4life, Commented May 16, 2012 at 13:47

Surfbutler · Accepted Answer · 2012-07-16 15:36:02Z

You can leverage XLinq To serialize/deserialize from XML data.

For example:

Serialization

    public static String ToXml(ObservableCollection<Data> items)
    {
        try
        {
            XElement _items = new XElement("Root",
                                from item in items()
                                select new XElement("Item",
                                    new XElement("Name", item.OrderId),
                                    new XElement("Type", item.OrderType),
                                    new XElement("Selected", item.Security)
                                    )
                                    );

            return _items.ToString();

        }
        catch (Exception ex)
        {


        }
        return String.Empty;
    }

Deserialization

public static ObservableCollection<Data> FromXml(String data)
{
    ObservableCollection<Data> dataCollection = default(ObservableCollection<Data>);
    try
    {
        XElement _items = XElement.Parse(data);
        var items = _items.Elements("Item").Select(i
            =>
            new Data
            {
                Name = i.Element("Name").Value,
                    Selected = bool.Parse(i.Element("Selected").Value),
                    Type = i.Element("Type").Value,
            }
        ).ToArray();

        if (items != null)
        {
            dataCollection = new ObservableCollection<Data>();
            foreach (var item in dataCollection)
            {
                dataCollection.Add(item);
    }
            return dataCollection;
        }
    }
    catch (Exception e)
    {
    }
    return null;
}

You can use the above function with File.ReadAllText, File.WriteAllText to read/write string into file.

Thanks for the responce, I have decided to go straight for using the SQL database and I am figuring out now how to write the information to it :)

Collectives™ on Stack Overflow

Loading data from an XML (WPF)

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related