Question

I have a customer class which has a byte array property.
The application uses the byte array as a source for an image.
When I change this array, the UI doesn’t update (since byte[] is not an ObservableCollection).

When can I do to force the UI to refresh?

EDIT : the image is saved as a byte array because that how it sits in the DB(varbinary(MAX)). I tried changing the type to IList but that popped errors in nhibernate : could not determine type for System..IList

Answer 1

Have your class implement INotifyPropertyChanged

As soon as the Byte array changes, raise the PropertyChanged event.

For example:

class Customer : INotifyPropertyChanged
{
    private byte[] byteArray;

    public byte[] ByteArray
    {
        get
        {
            return byteArray;
        }
        set
        {
            if (value != byteArray)
            {
                byteArray = value;
                RaisePropertyChanged("ByteArray");
            }
        }
    }

    private void RaisePropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName);
        }
    }


    public event PropertyChangedEventHandler PropertyChanged;
}