Bind visibility property to a variable

Question

I have a Border with Label inside a Window,

Answer 1

First you will need to make vis a Property:

private bool _vis;

public bool Vis
{
    get{return _vis;}
    set
    {
        if(_vis != value)
        {
            _vis = value;
        }
    }
}

Then you will need a ValueConverter.

[ValueConversion(typeof(bool), typeof(Visibility))]
    public class VisibilityConverter : IValueConverter
    {
        public const string Invert = "Invert";

        #region IValueConverter Members

        public object Convert(object value, Type targetType, object parameter,
            System.Globalization.CultureInfo culture)
        {
            if (targetType != typeof(Visibility))
                throw new InvalidOperationException("The target must be a Visibility.");

            bool? bValue = (bool?)value;

            if (parameter != null && parameter as string == Invert)
                bValue = !bValue;

            return bValue.HasValue && bValue.Value ? Visibility.Visible : Visibility.Collapsed;
        }

        public object ConvertBack(object value, Type targetType, object parameter,
            System.Globalization.CultureInfo culture)
        {
            throw new NotSupportedException();
        }
        #endregion
    }

You will need to create an instance of the converter like so in your resources:

Then you can bind your border like so: