Comments for The Inquisitive Coder - Davy Brion's Blog

Comment on MVP In Silverlight/WPF: Architectural Overview by Dan M

Dan M — Wed, 22 Feb 2012 17:27:00 +0000

Thanks, Davy. I’ll look forward to it

Comment on MVP In Silverlight/WPF: Architectural Overview by Davy Brion

Davy Brion — Wed, 22 Feb 2012 09:05:00 +0000

interesting question… i’m gonna turn that into its own post in a few days

Comment on MVP In Silverlight/WPF: Architectural Overview by Dan M

Dan M — Wed, 22 Feb 2012 00:42:00 +0000

I guess this comment is rather late, but I want to thank you for all the hard work you put into this series, especially the sample project. I’ve read a little about MPV before, but I think this is the first time I really got a feel for how it would work with a WPF/Silverlight app.

I can definitely see how this nicely decouples the binding model from the service layer, though it does seem a little awkward to me that you have to go through the code-behind to get to the presenter. It would be nice if you could somehow use commands to directly execute methods on the presenter, rather than having to go through a “middle man”. I don’t think there’s any straightforward way to do it, though. If there were a CommandContext to go along with the DataContext, maybe then it would be feasible.

I wonder if you have any thoughts on whether there is a size/complexity point where your MVP-BM architecture is overkill vs MVVM. For example, I tend to work on small to medium sized desktop apps that have a local database. While my view models do still have two responsibilities (data and commands), it just doesn’t feel like they’re “doing too much”. In addition, I’ve recently started using NotifyPropertyWeaver, which makes the data aspect of my view models almost trivially easy in many cases. Finally, even if I did have a remote data source/web service, I wonder if the new async features of .NET 4.5 wouldn’t simplify the code enough to still not warrant the more complex architecture.

Comment on DTO’s Should Transfer Data, Not Entities by Frank Vega

Frank Vega — Tue, 21 Feb 2012 23:08:00 +0000

“I think it makes a lot more sense to use DTO’s per service operation which are optimized for the use case that that service operation is meant to implement.”
Good advice! Even if syntactic coupling doesn’t bite you (by going heavily toward an entity-mimicking-DTO-route), the resulting semantic coupling might (maybe even worse?).

Comment on Prefixing Input Elements Of Partial Views With ASP.NET MVC by Just

Just — Tue, 21 Feb 2012 06:37:00 +0000

This doesn’t work with data annotations when rendering a model that fails validation because this data is in the ViewData dictionary. None of the validation messages will be sent into the partial, so validation won’t happen. In fact, you’ll likely wind up with a broken page as a result as the rendering pipeline gets hosed up by the changed view data dictionary.

Comment on Introducing AgUnit: Silverlight Unit Testing With Resharper by termit

termit — Mon, 20 Feb 2012 14:57:00 +0000

Still doesn’t work for Resharper 6.1

Comment on DTO’s Should Transfer Data, Not Entities by The Morning Brew - Chris Alcock » The Morning Brew #1047

The Morning Brew - Chris Alcock » The Morning Brew #1047 — Mon, 20 Feb 2012 09:32:09 +0000

[...] DTO’s Should Transfer Data, Not Entities – Davy Brion discusses a common Data Transfer Object anti-patern where the DTO starts to look a lot like the entity it is modelling, sharing some recommendations along they way. [...]

Comment on Think Twice Before You Map Entities To DTOs by DTO’s Should Transfer Data, Not Entities

DTO’s Should Transfer Data, Not Entities — Mon, 20 Feb 2012 09:20:22 +0000

[...] Populating those DTO's can then simply be done through straight SQL, a view, a stored procedure, a projection through your ORM, a map/reduce operation, or whatever else that makes sense. The point is that in most cases, you [...]

Comment on DTO’s Should Transfer Data, Not Entities by Davy Brion

Davy Brion — Mon, 20 Feb 2012 09:10:00 +0000

depends on the use case… if there’s an order screen where they can see the general details of a selection of orders, and then select an order to see the orderlines, i’d just return an array of dto’s containing the orderline data when it needs to be shown

if an order has to be shown in its entirety, i’d go with 2 DTO’s… one for the general order data, and another containing the data of all lines

there really is no one answer to that question… it all depends on the use case, which is the point of the post

Comment on DTO’s Should Transfer Data, Not Entities by Daniel Fernandes

Daniel Fernandes — Mon, 20 Feb 2012 06:59:00 +0000

Mmmh got confused by that guest posting

Comment on DTO’s Should Transfer Data, Not Entities by Blog

Blog — Mon, 20 Feb 2012 06:57:00 +0000

Indeed.
DTO or in general message types should ideally be both meaningful and intentional.
The only reuse is through composition but that needs to be used carefully to avoid confusion.

Comment on DTO’s Should Transfer Data, Not Entities by Mrdec

Mrdec — Mon, 20 Feb 2012 00:26:00 +0000

I’m interested in how You map an Order to DTOs. Reference from OrderDto to CustomerDto is not necessary, but how you map Order Lines?

Comment on NHibernate and virtual methods/properties by Daniel Marbach

Daniel Marbach — Sun, 19 Feb 2012 23:41:00 +0000

Hy
I know this post is a little old. But just wanted to mention that there is a post sharp static proxy extension for NHibernate which removes the need to declare virtual members.

See: https://github.com/Zoubi/NHibernate.StaticProxy

Comment on Why You Shouldn’t Expose Your Entities Through Your Services by DTO’s Should Transfer Data, Not Entities

DTO’s Should Transfer Data, Not Entities — Sun, 19 Feb 2012 19:32:21 +0000

[...] making those entities available outside of the service boundary for reasons that I've discussed earlier. That doesn't mean that you should go the entity-mimicking-DTO-route though. In fact, [...]

Comment on Storing data in the HttpSession by MN.BS

MN.BS — Sat, 18 Feb 2012 18:35:00 +0000

Thank you for sharing this knowledge, i was looking for this answer for a very long time. Probably i was not searching with the right key word.

Could you give one example how to access HttpSession with some kind of class.

Comment on Using SQL Functions in Criteria Restrictions by Rizwan Akram

Rizwan Akram — Wed, 15 Feb 2012 13:11:00 +0000

how to use function’s parameters like TO_CHAR(date_column, ‘dd-mon-yyyy’), how I supply ‘dd-mon-yyyy’ as parameter in the example?

Comment on Of Course NHibernate Is Slow When You Use It Incorrectly by 最想要的实体框架功能 | chainding

最想要的实体框架功能 | chainding — Mon, 13 Feb 2012 03:20:37 +0000

[...] 对于业务线（LOB，即Line of Business）应用程序而言，批量创建/更新/删除是一关键功能，而在大多数对象关系映射（ORM）工具中大概都没有此功能。像DBase和PowerBuilder等一些早期编程语言在几十年前已有此种能力。一些人甚至提出，对象关系映射（ORM）工具不适用于大容量事务，而更适合于在线交易处理（OLTP）及非批处理操作。 [...]

Comment on Hosting A Node.js Site Through Apache by Aloofpanda

Aloofpanda — Sun, 12 Feb 2012 05:42:00 +0000

Why do you still want to use Apache? Its slow and only has a max concurrent connection of 20k.

Comment on Everybody Wins In The Certification Game by Nathan Smith

Nathan Smith — Fri, 10 Feb 2012 21:17:00 +0000

That’s not accurate. You did not HAVE to get certified. While Avanade’s publicly stated policy is that you need a certification in a year, the fact of the matter is that it’s not enforced. It may be used as an aid to construct an improvement plan to get someone fired that you know can’t complete it, but that policy was laughable. At best, 10% of people in the Desert region at the time had a premier ceritifcation, if that. In fact, I’m pretty sure it was just two people (me being one of them).

Comment on The Non-Typical .NET Job by Stuart

Stuart — Fri, 10 Feb 2012 11:30:00 +0000

@9599ffd81cd03f5c34610ce13caf1ca3:disqus – yeah it has been addressed already but no steps has been take yet to fix it.

http://www.tatvasoft.co.uk/microsoft-dot-net-development.php