private Enum GetUndefinedValue()
{
var undefinedEnumValueAttribute = AttributeUtility.GetCustomAttribute <UndefinedEnumValueAttribute> (UnderlyingType, false);
if (undefinedEnumValueAttribute == null)
{
return(null);
}
if (!UnderlyingType.IsInstanceOfType(undefinedEnumValueAttribute.GetValue()))
{
throw new InvalidOperationException(
string.Format(
"The enum type '{0}' defines a '{1}' with an enum value that belongs to a different enum type.",
UnderlyingType,
typeof(UndefinedEnumValueAttribute)));
}
if (IsNullable)
{
throw new InvalidOperationException(
string.Format(
"The property '{0}' defined on type '{1}' must not be nullable since the property's type already defines a '{2}'.",
Identifier,
PropertyInfo.DeclaringType,
typeof(UndefinedEnumValueAttribute)));
}
return(undefinedEnumValueAttribute.GetValue());
}
protected override bool SetValueInternal(object value, ValueUpdateSource updateSource)
{
bool result = false;
#if _DOTNET2
NullableConverter nc = TypeConverter as NullableConverter;
if ((value == null) || ((value != null) && UnderlyingType.IsInstanceOfType(value)) ||
((nc != null) && ((value == null) || nc.UnderlyingType.IsInstanceOfType(value))))
#else
if ((value != null) && UnderlyingType.IsInstanceOfType(value))
#endif
{
UnderlyingValue = value;
result = true;
}
if (updateSource != ValueUpdateSource.FromChild)
{
if ((mOwnerEnumerator != null) && // mOwnerEnumerator could be null for the boolean of Property._enabledVariable
!mOwnerEnumerator.Property.Value.NoLinkWithChildren)
{
PropertyTypeDescriptorContext context = GetTypeDescriptorContext(OwnerEnumerator);
if (TypeConverter.GetPropertiesSupported(context) == false)
{
PropertyEnumerator childEnum = mOwnerEnumerator.Children;
if (childEnum.Count > 0)
{
string masterStr = mOwnerEnumerator.Property.Value.GetStringValue();
char separator = mOwnerEnumerator.Property.Value.GroupedValueSeparator;
while (childEnum != childEnum.RightBound)
{
masterStr.TrimStart(null);
int count = masterStr.IndexOf(separator);
if (count != -1)
{
childEnum.Property.Value.SetValue(masterStr.Substring(0, count));
if (count + 2 < masterStr.Length)
{
masterStr = masterStr.Substring(count + 2); // advance after the separator and the leading space
}
}
else
{
childEnum.Property.Value.SetValue(masterStr);
break;
}
childEnum.MoveNext();
}
}
}
}
}
return(result);
}