BTW, Daniel said exactly what you said.
On Thu, Dec 18, 2008 at 11:25 PM, Will Shaver <[email protected]> wrote:
> Yes, but with both Daniel and Tuna's examples are incomplete.
> if (typeof(IAuditableEntity).IsAssignableFrom(entity.GetType())) {
> ((IAuditableEntity) entity).Audit();
> }
> or
> if (entity is IAuditableEntity) {
> ((IAuditableEntity) entity).Audit();
> }
>
> In BOTH cases you have to do TWO casts. In mine you only have to do one. I
> learned in C++ where casting and boxing take cycles.
>
> -Will
>
>
> On Thu, Dec 18, 2008 at 1:17 PM, Tuna Toksöz <[email protected]> wrote:
>
>> or
>>
>> if (entity is IAuditableEntity)
>> ? :)
>>
>> On Thu, Dec 18, 2008 at 11:08 PM, Daniel Fernandes <
>> [email protected]> wrote:
>>
>>>
>>> Beside the point I know but :
>>> if (typeof(IAuditableEntity).IsAssignableFrom(entity.GetType())) {
>>> to
>>> var auditable = entity as IAuditableEntity;
>>> if (auditable != null) {
>>>
>>> isn't easier to read ?
>>>
>>>
>>>
>>> On Dec 18, 6:35 am, "Stefan Sedich" <[email protected]> wrote:
>>> > Hello,
>>> >
>>> > I am setting date last modified audit on an entity, I implement an
>>> > IAuditableEntity interface and use a helper to set the date modified:
>>> >
>>> > public override bool OnFlushDirty(object entity, object id, object[]
>>> > currentState, object[] previousState, string[] propertyNames,
>>> > global::NHibernate.Type.IType[] types) {
>>> >
>>> > if
>>> (typeof(IAuditableEntity).IsAssignableFrom(entity.GetType())) {
>>> >
>>> > // If entity is auditable as this is only an update
>>> > set the last modified date.
>>> > SetValue(propertyNames, currentState, item =>
>>> > item.LastModified, DateTime.Now);
>>> >
>>> > }
>>> >
>>> > return false;
>>> > }
>>> >
>>> > Type safe helper:
>>> >
>>> > public void SetValue<T>(string[] propertyNames, object[] state,
>>> > Expression<System.Func<IAuditableEntity, T>> propertyExpression, T
>>> > value) {
>>> >
>>> > var memberExpression = propertyExpression.Body as
>>> MemberExpression;
>>> > if (memberExpression == null)
>>> > throw new ArgumentException("The member expression was
>>> > not a valid member expression.");
>>> >
>>> > string name = memberExpression.Member.Name;
>>> > int index = propertyNames.ToList().IndexOf(name);
>>> >
>>> > if(index == -1)
>>> > throw new
>>> > InvalidOperationException(string.Format("Property {0} does no exist on
>>> > entity.", name));
>>> >
>>> > state[index] = value;
>>> >
>>> > }
>>> >
>>> > Now the question is, I saw that you must set the current state and not
>>> > the entity directly why would
>>> >
>>> > var ent = entity as IAuditableEntity;
>>> > ent.LastModified = DateTime.Now;
>>> >
>>> > Not work properly or will it be fine to do this?
>>> >
>>> > Thanks
>>> >
>>> > --
>>> > Stefan Sedich
>>> > Software Developerhttp://weblogs.asp.net/stefansedich
>>>
>>>
>>
>>
>> --
>> Tuna Toksöz
>> http://tunatoksoz.com
>>
>> Typos included to enhance the readers attention!
>>
>>
>>
>>
>>
>
> >
>
--
Tuna Toksöz
http://tunatoksoz.com
Typos included to enhance the readers attention!
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