public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string text)
{
return(CharacterCollection.Parse(text));
}
return(base.ConvertFrom(context, culture, value));
}
/// <summary>
/// 0-255,256
/// </summary>
public static CharacterCollection Parse(string text)
{
if (text == null)
{
throw new ArgumentNullException(nameof(text));
}
var items = text.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
var capacity = GetCapacity(items);
var characters = new CharacterCollection(capacity);
Enumerate(items, (item) =>
{
var min = item.min;
var max = item.max;
for (var i = min; i <= max; i++)
{
characters.Add(i);
}
});
return(characters);
}