Suspend Databinding of Controls

Question

I have a series of controls that are databound to values that change every second or so. From time to time, I need to \"pause\" the controls, so that they do not update their d

Answer 1

To deal with the source set the UpdateSourceTrigger to be Explicit.

Then in code behind reference a service which can deal with the actual updating as defined by your conditions.

BindingExpression be = myTextBox.GetBindingExpression(TextBox.TextProperty);
be.UpdateSource();

This will allow you to specify at which point the data goes back to the source from the target.

The target can be addressed by making a call to the same referenced service which has the knowledge on when to call the INotifyPropertyChanged.PropertyChanged event within your ViewModel.

    class Data : INotifyPropertyChanged
    {
        Manager _manager;

        public Data(Manager manager)
        {
            _manager = manager;
        }

        public event PropertyChangedEventHandler PropertyChanged;

        String _info = "Top Secret";
        public String Information
        {
            get { return _info; }
            set 
            {
                _info = value;

                if (!_manager.Paused)
                {
                    PropertyChangedEventHandler handler = PropertyChanged;
                    if (handler != null)
                        handler(this, new PropertyChangedEventArgs("Information"));
                }
            }
        }
    }