How to Display ObservableCollection in a UserControl

Question

I\'m new to WPF and I\'ve found some similar questions but can\'t quite figure out the last part. I have a ViewModel with an ObservableCollection that contains error messag

Answer 1

Simplest way:

Assuming your viewmodel implements INotifyPropertyChange, create an event handler for the ObservableCollection PropertyChanged event. Create a property which aggregates all of the items in the observable colleciton into a single string. Whenever the observable collection changes, fire off a notification event for your new property. Bind to that property

public class ViewModel : INotifyPropertyChange
{
    public ViewModel()
    {
        MyStrings.CollectionChanged += ChangedCollection;
    }
    public ObservableCollection MyStrings{get;set;}

    public void ChangedCollection(args,args)
    {
        base.PropertyChanged("MyAllerts");
    }

    public string MyAllerts
    {
        get
        {
            string collated = "";
            foreach(var allert in MyStrings)
            {
                collated += allert;
                    collated += "\n";
            }
        }
    }

}

I know this code is fraught with errors (i wrote it in SO instead of VS), but it should give you some idea.