I have question about N-tier architecture. everyone about 3-Layer architecture these are:1). UI Layer, 2). Business Layer, 3). Data Access Layer.i already have worked on this.Then i heard about LINQ to sql. please tell me how many layer an web application should contain. As my knowledge. if i use LINQ to slq then i have to worked only 2-Laye
View 9 RepliesI have question about N-tier architecture. everyone about 3-Layer architecture these are:
1). UI Layer,
2). Business Layer,
3). Data Access Layer.
i already have worked on this.
Then i heard about LINQ to sql. how many layer an web application should contain.
As my knowledge. if i use LINQ to slq then i have to worked only 2-Layer:
- Data Acess/Business Layer: which contains only *.dbml files which is my database and
- UI Layer: which contains *.aspx files.
I am implementing 3-tier architecture. I just wanted to know the role of business layer in 3-tier architecture.
I am developing application in using entity framework. So I have entity object which is accessiable in PL,BL & DL. My question is whether input assignment to entity object should be in PL OR BL.(Consider there is save method)
whats is the difference three tier and three layer architecture. I need three tier architecture which is fulfill the object oriented requirement. and database change flexibility.
View 4 RepliesI am making use of 3-tier architecture.In UI layer, i am getting user input and converting it into XML document. But now question arises that how can i pass this xml document to business and data access layer?
View 2 RepliesIn this website article http://aspalliance.com/1943_ASPNET_40_and_the_Entity_Framework_4__Part_4__A_3_Layered_Approach_to_the_Entit_Framework
Vince Varallo says this in his opening paragraphs. "it will introduce a pattern for developing the application as a three layered application. Notice that I didn't say three tiered application. A tier really means a logical and physical separation of the layers. A layer implies just a logical separation. For many applications that's all you need. I'm not one to advocate over-engineering a system.
I always follow the simpler, better approach as long as the developers working with you understand the pattern."
Question 1. Can some explain to me what is difference between a 3 layer application and a 3 tiered application?
Question 2. Also, can some give me a link to a simple 3 tiered tutorial for entity framework?
How to create the DAL Layer for the 3tier Architechture
View 1 RepliesI have a solution that consists of some web projects and websites (seperate projects in one solution) When I run the main project and debug I want to step into a function that resides in another project as a business layer function and then step into another function in DAL project. I set breakpoints in both projects (DAL and BLL) but am not able to step into those functions!!!
What is the problem with vwd express, It should support such vital thing.
How can I ensure that web application converted from 2003 visual studio to 2008 visual studio
to have two files as it is when create a web file in visual studio 2008.The web application is in Chsarp. I have converted these filesfrom 2003 to 2008 but they still have three files each.
is there any impact of using static methods in Business Access layer in 3 tier applciation,
View 4 RepliesAll the data between UI and Data tier communicates through xml.I am using Utf-8 which causes the broken xml whenever special characters are inserted in UI. Is there some way, that I can convert the Utf-8 to Utf-16. Does it affect the existing code? What is the best way to convert or allow these special characters?
View 3 RepliesI'm trying to publish my ASP.NET web application in Visual Studio 2010. I'm then trying to install it as a website on a server using IIS. I've gotten my application to publish (to a .zip file) but it points to the physical directory on my hard drive. This obviously will not work on the server.
View 3 Replieshow can i install linq in my visual studio 2008.
View 2 RepliesI'm trying to install LINQ to SQL Debug Visualizer on Visual Studio 2010 Professional on a x64 Windows7 machine.I've downloaded SqlServerQueryVisualizer.dll assembly from following locationhttp://www.scottgu.com/blogposts/linqquery/SqlServerQueryVisualizer.zipand copied assembly to C:Program Files (x86)Microsoft Visual Studio 10.0Common7PackagesDebuggerVisualizers
View 1 RepliesI am not able to catch the databing mechanism when used with LINQ.I am able to populate the data correclty agaisnt my comboboxes. the thing I am not able to catch is when changing an item in the dropdownlist and set the focus on some other control in my form, the combobox resets to its original value. this way I am not able to send changes back to the database.ave you got any solution, or you need more explanation?:)
View 2 RepliesHow to remove the unused references in form level, vb.net application and web application?
How can I use fxcop to identity undisposed objects like dataset, dataview, connection, stream...? Any one having custom rules for the same?
on desktop start has disappeared, getting above issue on double clicking/running any application.have VS2005 installed with sp1 and all other relevant updates as per MS..., i read some forums which states because of VC++ the system files may be currupted....have not installed VC++can anyone guide me the issue here and its solution...
View 3 RepliesIn some of my new websites under .NET 4.0 my Visual Studio does not recognize System.Linq as a valid class. I need to add a reference to System.Core in Web.Config to solve this but there are projects where this is not needed.
View 8 RepliesI'm developing a n-tier architecture... I'm confused with handling exception in the layers... Is it a good practise to add a Exception Layer to the architecture.
View 3 Repliesis it possible to convert whole visual studio 2008 web site project to visual studio 2010 web site project
my current project references
i have a very annoying iis problem
iis server stops working until app pool is recycled
i am hoping that new visual studio (net framework 4.0) may solve this very annoying unsolveable problem
I have an MVC 2 web application which uses models auto-generated by LINQ. When I add a Silverlight project to my solution, generating a new strongly-typed View fails with the message:
Compiling transformation: The type or namespace name 'Data' does not exist in the namespace 'System' (are you missing an assembly reference?). I understand this is most likely because Silverlight does not access the System.Data namespace (at least, I can't add the reference to my Silverlight app). However, it's not really important - I'm just trying to generate an .aspx View at this stage, not a Silverlight View.
Is there any way to get this template generation to work, or do I have to create my Silverlight project outside the solution and build it separately? I was kind of hoping to take advtage of WCF RIA and some of the other goodies one gets from including the Silverlight app within the main solution... anybody got a fix?
Using System.Linq; namespace does not supportted in VS2005 version 2.00.
View 1 RepliesI can't believe I'm having so much trouble finding this information. I'm endeavouring to learn about creating model classes with Linq to SQL. By default VS2010 wants to use SQL Express, but our organisation has several database servers for development so I'd rather use one of those. PLEASE can somebody tell me how I can configure VS2010 to do that, as all I get is 'A network-related or instance-specific error occurred while establishing a connection to SQL Server ... Verify that the instance name is correct'. Yeah, thanks Microsoft. Actually telling me how to verify the instance name would be a really good move here.
View 1 RepliesAnyone know if I can maintain a VS 2008 (.net 3.5) project by using the VS 2010 IDE ?
View 1 RepliesThis problem is trivial to duplicate. Do any query on a table which contains a timestamp / rowversion column. Set a breakpoint and examine the resulting query in the Linq to SQL visualizer. Click on Execute which displays the results in a DataGridView. For each row you get "System Argument Exception: Parameter is not valid" when it tries to display the timestamp / rowversion in the grid. What is most annoying is that there is no way to get out of the visualizer without going to Task Manager and killing the Visual Studio process, devenv.exe.
This is definitely a bug. How can you presume to be able to display a database query when you can't display an essential datatype like timestamp / rowversion? Is there any way around this ? I would like to add that in general the CLR is woefully inadequate in the way it handles timestamp / rowversion fields. It would be nice if they could be defined, copied, compared, displayed and serialized in some standardized automatic way.