// Exceptions:
// System.ArgumentNullException:
// source object is null.
//
// System.ArgumentException:
// source object is not null and is not a valid type that can be converted to
// a System.Windows.GridLength.
/// <summary>
/// Attempts to convert a specified object to an instance of System.Windows.GridLength.
/// </summary>
/// <param name="context">Describes the context information of a type.</param>
/// <param name="culture">Cultural specific information that should be respected during conversion.</param>
/// <param name="value">The object being converted.</param>
/// <returns>
/// The instance of System.Windows.GridLength that is created from the converted
/// source.
/// </returns>
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value == null)
{
throw GetConvertFromException(value);
}
if (value is string)
{
return(GridLength.INTERNAL_ConvertFromString((string)value));
}
return(base.ConvertFrom(context, culture, value));
}