public static object ChangeType(object item, Type destinationType)
{
if (item == null || item == DBNull.Value)
{
return destinationType == typeof(DBNull) ? DBNull.Value : null;
}
var itemType = item.GetType();
if (itemType == typeof(string))
{
object result;
if (TryStringToEnum(item, destinationType, out result))
{
return result;
}
}
else if (itemType.IsClass)
{
return ReflectionCast(item, destinationType);
}
var tmpItem = new CastItem(item, itemType);
tmpItem = TryUnpackNullable(tmpItem);
tmpItem = TryUnpackEnum(tmpItem);
item = tmpItem.Value;
return Pack(item, destinationType);
}
private static CastItem TryUnpackNullable(CastItem item)
{
var type = Nullable.GetUnderlyingType(item.Type);
if (type == null) return item;
var value = Convert.ChangeType(item.Value, type);
return new CastItem(value, type);
}
private static CastItem TryUnpackEnum(CastItem item)
{
if (!item.Type.IsEnum) return item;
var type = Enum.GetUnderlyingType(item.Type);
var value = Convert.ChangeType(item.Value, type);
return new CastItem(value, type);
}
public CastVm(CastItem castItem, IAppContext appContext)
: base(castItem.thumbnail, appContext)
{
_castItem = castItem;
_appContext = appContext;
Name = _castItem.name;
Role = _castItem.role;
}
private CastVm ItemFactory(CastItem arg)
{
if (first)
{
first = false;
return(new FirstCastVm(arg, _server));
}
return(new CastVm(arg, _server));
}
public FirstCastVm(CastItem castItem, AppContext appContext) : base(castItem, appContext)
{
ColSpan = 2;
RowSpan = 2;
}
