.NET Tips and Tricks -How the RefreshPropertiesAttribute works

How the RefreshPropertiesAttribute works

Use the RefreshPropertiesAttribute to indicate how a designer or a databound control refreshes its properties when they are changed. This is extremely useful for properties whose values should be updated and displayed when other properties are changed.

Example:

		
public class Square : Shape
{
    private double _length;
    
    public override int NumberOfSides
    {
        get
        {
            return 4;
        }
    }

    [Browsable(true)]
    [RefreshProperties(RefreshProperties.All)]
    public double Length
    {
        get
        {
            return _length;
        }
        set
        {
            _length = value;
        }
    }

    public override double Area
    {
        get
        {
            return _length*_length;
        }
    }
}

In the example above, whenever the Length property changes, the Area property is automatically requeried and repainted in the designer and/or PropertyGrid.

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