Of Models / Entities and N-tier applications

Posted by Jonn on Stack Overflow See other posts from Stack Overflow or by Jonn
Published on 2010-05-03T15:44:46Z Indexed on 2010/05/03 15:48 UTC
Read the original article Hit count: 245

Filed under:

n-tier-architecture

|

model

I've only discovered a month ago the folly of directly accessing entities / models from the data access layer of an n-tier app. After reading about ViewModels while studying ASP.NET MVC, I've come to understand that to make a truly extensible application the model that the UI layer interacts with must be different from the one that the Data Access layer has access to.

But what about the Business layer? Should I have a different set of models for my business layer as well? For true separation of concern, should I have a specific set of models that are relevant only to my business layer so as not to mess around with any entities (possibly generated by for example, the entity framework, or EJB) in the DAL or would that be overkill?

© Stack Overflow or respective owner

Related posts about n-tier-architecture

3-Tier Architecture in asp.net

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
Three-tier (layer) is a client-server architecture in which the user interface, business process (business rules) and data storage and data access are developed and maintained as independent modules or most often on separate platforms. Basically, there are 3 layers, tier 1 (presentation tier… >>> More
How to implement a .net 3-tier architecture using Winforms

as seen on Stack Overflow - Search for 'Stack Overflow'
I have for some time build n-tier Applications using a database server as the data tier, Winforms as the presentation tier and an ASP.NET asmx webservice in the middle to send back and forth untyped Datasets. While this approach has worked for me so far, it certainly does feel outdated today. What… >>> More
N-Tier Architecture - Structure with multiple projects in VB.NET

as seen on Stack Overflow - Search for 'Stack Overflow'
I would like some advice on the best approach to use in the following situation... I will have a Windows Application and a Web Application (presentation layers), these will both access a common business layer. The business layer will look at a configuration file to find the name of the dll (data… >>> More
WCF and N-tier architecture

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi,,, I’m working on an application which has been designed using n-tire application architecture .The application was developed in the .NET platform utilizing C#,VB.NEt, Framework 3.5, Dataset, WCF, asp.net update panel, JavaScript ,Josn, 3rd Party tools. my current proposed layout is such presentation… >>> More
General N-Tier Architecture Question

as seen on Stack Overflow - Search for 'Stack Overflow'
In an N-Tier app you're supposed to have a business logic layer and a data access layer. Is it bad to simply have two assemblies: BusinessLogicLayer.dll and DataAccessLayer.dll to handle all this logic? How do you actually represent these layers. It seems silly, the way I've seen it, to have a BusinessLogic… >>> More

Related posts about model

Why model => model.Reason_ID turns to model =>Convert(model.Reason_ID)

as seen on Stack Overflow - Search for 'Stack Overflow'
I have my own html helper extension, wich I use this way <%=Html.LocalizableLabelFor(model => model.Reason_ID, Register.PurchaseReason) %> which declared like this. public static MvcHtmlString LocalizableLabelFor<T>(this HtmlHelper<T> helper, Expression<Func<T, object>>… >>> More
Rails model belongs to model that belongs to model but i want to use another name

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello. This may be a stupid question but im just starting to learn Rail thats why i am asking thsi question. I have one model called "User" which handles all the users in my community. Now i want to add a guestbook to every user. So i created a model called "user_guestbook" and inserted this into… >>> More
AngularJS on top of ASP.NET: Moving the MVC framework out to the browser

as seen on Simple Talk - Search for 'Simple Talk'
Heavily drawing inspiration from Ruby on Rails, MVC4’s convention over configuration model of development soon became the Holy Grail of .NET web development. The MVC model brought with it the goodness of proper separation of concerns between business logic, data, and the presentation logic. However… >>> More
strange data annotations issue in MVC 2

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I came across something strange when creating an edit form with MVC 2. i realised that my error messages come up on form sumission even when i have filled ut valid data! i am using a buddy class which i have configured correctly ( i know that cos i can see my custom errors). Here is the code… >>> More
How to disabled the input,textarea,select using this code..

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello friends I am using this code in my view.. <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<NorthernTrust.ATP.iTool.Core.Business.Entities.Exceptions.PricingMassEditBE>" %> <script type="text/javascript"> $("#PricingEditExceptions").find("input, select… >>> More