public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string)
{
AnimalList animals = new AnimalList();
string[] animalStrings = (value as string).Split(new char[] { '#', '$' }, StringSplitOptions.RemoveEmptyEntries);
foreach (string animalString in animalStrings)
{
string[] animalInfo = animalString.Split(':');
AnimalInfo animal = new AnimalInfo();
animal.Name = animalInfo[0];
animal.Number = Int32.Parse(animalInfo[1]);
animals.Add(animal);
}
return(animals);
}
else
{
throw new ArgumentException("In ConvertFrom: can not convert to List<AnimalInfo>.");
}
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (value is AnimalList)
{
AnimalList animals = value as AnimalList;
StringBuilder text = new StringBuilder();
for (int i = 0; i < animals.Count; i++)
{
AnimalInfo animal = animals[i];
text.Append(animal.Name + ":" + animal.Number);
if (i != animals.Count - 1)
{
text.Append("#");
}
}
return(text.ToString());
}
else
{
throw new ArgumentException(string.Format("In ConvertTo: can not convert type '{0}' to string.", value.GetType().AssemblyQualifiedName));
}
}