Design Pattern For A Simple CRUD Data Driven Application?
Jul 28, 2010
the best practice for a designing a simple CRUD application with some screens updating various tables (like admin pages to maintain static data for an application). the simplest way would be to drag a data grid/gridview, bind it to a dataset and use a data adapter for CRUD operations. but if this application needs to be scalable, lets say to add any extra UI/business logic in future, then is there any design pattern that can with this? should I be using an object data source control and bind it to business objects instead? or are there any better ways of doing it? should I build a complete layered application or will that be overengineering for this requirement?
View 3 Replies
Similar Messages:
Nov 17, 2010
I am looking for an accepted pattern for using MVC 2 and EF. Especially I am interested on how to implement updates. Where should the ObjectContext be created, where should the queries be, how to pass a model object from the controller and have it persisted with minimum robust code. I also want to be able to use transactions when updating multiple objects.
I used Linq in an asp.net application (code behind model). With EF I was hearing it was much more n-tier friendly, but I don't find it any different, rather than people talking about POCO which to me, all it means is satisfying the desire of those that want to have control of every piece of code being created.
View 6 Replies
Aug 21, 2010
Now that the next version of ASP.NET MVC is being prototyped and previewed (ASP.NET MVC 3 Preview 1 came out a couple of weeks ago), I wonder if we should call the attention of the Core Dev team (S Hanselman, Phil Haack and all) to this "feature."there a easy/non tacky way of associating subdomains → areas?Something like:
[URL]Also, whats the best accepted design pattern in implementing PRG pattern in ASP.NET MVC? I guess it should also get some official loving in MVC 3.
View 2 Replies
Jan 17, 2010
I didn't really know where and how to put this so here we go:
I'm trying to design a map with co-ordinates that's driven from data in a database. I want it to look something like this:
Also, the selected X/Y co-ordinate must be centered for the user to see. How could I produce something like this?
View 5 Replies
Mar 9, 2011
Assuming my application did not warrant a full blown DDD setup, would Repositories still be useful? I like the way they shield from implementation details (such as use of Entity Framework) underneath. However Repositories tend to be tied to Aggregate Roots (the concept is still a holy grail to me) by definition.
I suppose the question could also be put as such: if I have a typical 3-tier application, with a business layer facade consisting of "logical grouping" classes based on functionality (rather than aggregate roots as in DDD) such as TradingManager and ContactsManager, would it make sense to also create "logical grouping" repositories. Or perhaps a Data Access Object, which I believe is like a Repository without the aggregate root requirement. Of course I will still have a Model (EF POCOs) that will be passed up and down between the layers.
Also, is what I just described would be considered as a Transaction Script approach? It's certainly not DDD, and not Active Record. I'm not even sure if Active Record exists with EF4 like it does with Nhibernate.
I am trying to understand how others structure n-layered applications when they do not follow DDD.
View 2 Replies
Aug 7, 2010
I want to know what is the advantages of using aggregates in c# for design patterns.
suppose i have tree tables
Member(M_Id,M_Info)
Bid(B_Id,B_Info,M_Id,Item_Id)
Item(Item_Id,Item_Info)
"One member can place more than one bid on more than one item."
so there is one to many bidirectional association between Bid and Member table.
And one to many association between bid and item table Now According to defination of aggregates in this case Item table is the root of aggregate item and item has aggregation with bid table.
and bid table holds unidirectional reference to member table and hence only bid table has access over member table.
But ultimately this will also map in database same as without using aggregate then what is use of aggregates?
View 4 Replies
Apr 18, 2010
design pattern that works well with Visual Studio data tools against an MS SQL server; to retrieve a subset of an object's fields for all rows, and then on-demand retrieve the remainder for one row. I.E. just the small summary fields that I will serialize to a master grid view, then the larger properties including a large blob that I will render in a detail view. The performance hit from retrieving the large blob with the master result list would be too great.
The data shape is static, and I can define two separate data classes to match the specific summary vs. detail information returned. However that sounds anti-pattern-ish, to define the data classes specifically to suit the presentation layer. It also presents another problem, how to translate from the summary item to the detail item in an object-oriented way?
View 9 Replies
Nov 25, 2010
Sample web application code where content(like forms) is generated based on user role like admin,priority1 user,priority2 user.
View 1 Replies
May 24, 2010
So, after all and after all these projects that have been done. What is the best way and I should consider as standard in the furute to start any further ASP.NET Projects that are database driven.
I have done many using
1. Store procedures and classes
2. One class to handle all the add,delete,update ...etc functions
3. ADO.NET
4. Using sql statements directly on the code (I know not recommended, it was my first project) :))
..and so on
What method you recommend in the future that will save me code and errors and optimize my application speed as well.
View 2 Replies
Jul 20, 2010
I am using asp.net and c#.
I have a some classes. Some of the classes are having same methods insert, update and delete.
Each insert will insert different data to different table. (same for update and delete). What type of pattern can be applied for this kind of class.
View 3 Replies
Feb 26, 2011
So yesterday my mate and myself had this duscussion about the architecture of this e-shopping website that im developing. Note that I work with ASP.NET for this. He was quite surprised to learn that I do not keep the Items added to the shopping-cart in an ArrayList or other Generic list but rather i insert them straight to the database using LINQ To Entities. Could I pass only for this web app and not use n-tire or should I do as my friend suggested which is, have methods that perform updates, deletions etc..
View 2 Replies
Apr 4, 2011
I sell products throgh my website. Recently we've been given a list of rules that need to be checked against each order, to make sure it's not fraudulent. So this list of rules/fraud indicators will change and grow so I want to make sure it's easily maintainable and really solid. I'm thinking I have an abstract class rule that each of the rules implements.
abstract class Rule
{
public string Message;
public bool Success;
public void CheckOrder(OrderItem currentOrder);
}
class FakeCreditCardNumberRule : Rule
{
public string Message = "Fake CC Number Rule";
public void CheckOrder(OrderItem currentOrder)
{
currentOrder.CreditCardNumber = "1234-5678-9012-3456";
Success = false;
}
}
class ReallyLargeOrderRule : Rule
{
public string Message = "Really Large Order Rule";
public void CheckOrder(OrderItem currentOrder)
{
currentOrder.ItemsOrder.Count > 100;
Success = false;
}
}
Then I'm thinking of having a class that accepts an Order object in it's costructor and checks though the list of rules. Something like:
class FraudChecker
{
List<Rule> rules;
public FraudChecker(OrderItem currentOrder)
{
foreach(var rule in rules)
{
rule.CheckOrder(currentOrder);
}
}
}
So I was trying to think of the best place/best way to populate the FraudChecker.Rules list and started thinking there might be some nice design pattern that does something like what I'm doing. Has anyone seen a design pattern I should use here? Or can anyone think of a good place to populate this list?
View 3 Replies
Sep 14, 2010
I am planning to generate the UI from database.The platfrom will be ASP.net.Can anyone help in identifying the best design pattern/Architecture that suits for generating the UI and events dynamically.
View 3 Replies
Mar 22, 2011
suggest me a good design pattern for implmenting the following? I have an object say myObject. This myObject is created using few inputs from the UI. After the creation of myObject. This object will be passed to few methods.. like method1(myObject);
method2(myObject);... method5(myObject);etc. Each methods will prepare the input for successive methods call. For example method1(myObject) will set the values necessary for the operation of method2.Then method2(myObject) will set up the values necessary for the operation of method3 and so on..Same object is used as the argument for every method calls.Which design pattern can be implemented?
View 2 Replies
Jan 28, 2011
I'm looking to build an ajax page; it's a reporting page. By default, load today's report. On the page there's a calendar control and when the user clicks on a date, reload the gridview with the corresponding data. Is it considered good practice to do the following:
1) on the first page load, query the data for the page
2) put the query result in the session object and display it in a gridview
3) if the user requests new data, get new data from the query with different parameters
4) put the result of the second query in the session object and display it
5) if the user then requests the data from the first query, get it from the session object
6) do the sorting and paging with the data held in the session.
Note: the data of each query will contain about 300-500 rows and about 15 columns. I'd like to do all this with ajax calls. What are some suggestions and pitfalls to avoid.
View 4 Replies
Apr 1, 2010
how the data pass from one layer to another layer in mvc design pattern...
View 2 Replies
Mar 4, 2011
Firstly - I'm not asking this question How to include a web service in MVC3? I know where the button is :-)
I'm trying to find an example of best practices of how to use the new DI / Common Service Locator framework in order to make web service calls (and code dependent on web service calls) testable. I've no experience of using NInject or the like - is that the way to go?
View 2 Replies
Jul 17, 2010
I visited this Link to study about Factory design pattern.http://wiki.asp.net/page.aspx/310/factory/ But i am confused about it still. What i understood is that we must use an Interface to define a class .In the interface we will give the prototype of functions and later on we will define it in concrete class. Is that simple concept is Factory design pattern ?
View 13 Replies
May 2, 2010
We have a big portal that needs user registration to allow them use its services. It's already done in .NET and SOL Server 2005. we are in the phase now of discovering all the problems of the current registration system to build a new robust flexible one that can be extended easily and can be more usable for all services.
View 3 Replies
Jan 12, 2011
i want to know which design pattern is good for forums web site design
View 5 Replies
Mar 19, 2010
We are going to develop content Management System in ASP.net. what is the good design pattern do we need to follow in order to have good design.
View 2 Replies
Mar 13, 2011
i would like to ask about the design pattern of insert/update/delete record in the datagrid.
my page have 3 datagrids, each datagrid display different data.
but when clicking the save/update/delete button, how can i write a good progrmming pattern to perform this action.
any example code for my reference?
View 1 Replies
May 7, 2015
In one of the interview, I was asked why should we have to go for Single Design pattern, instead of just creating static methods. Because creating static methods also serve the same purpose, i.;e avoiding flooding of objects.
View 1 Replies
Jan 19, 2010
When I first heard about ASP.NET MVC, I was thinking that would mean applications with three parts: model, view, and controller.
Then I read NerdDinner and learned the ways of repositories and view-models. Next, I read this tutorial and soon became sold on the virtues of a service layer. Finally, I read the Fluent Validation documentation, and I'll be darned if I didn't end up writing a bunch of validators.
Tonight, I took a step back and thought about what had become of my project. It seems to have become the victim of the design pattern equivalent of "feature creep". Somehow I'd gone from Model-View-Controller to Model-Repository-Service-Validator-View-ViewModel-Controller. You want loosely coupled and DRY? We got your loosely coupled and DRY right here! But I'm wondering if this could be a case of too much of a good thing.
Am I right to be concerned? Or is this actually not as crazy as it sounds? On one hand, it seems crazy to have so many layers. On the other hand, every layer has a clearly defined purpose that makes sense to me. Have your MVC applications turned into MRSVVVMC apps too? If not, what do they look like? Where's that right balance?
View 2 Replies
Feb 17, 2010
I'm trying to write a web app using 4-tier design pattern ( Data Store, DAL, BLL and UI).
Among other things this app would also implement a forum.
Suppose I want to move a thread from one forum to another. In order to do this, UI layer must pass down to other layers the ID of a thread and the ID of a forum to which I wish to move this thread ( UI would pass these parameters by calling method A in BLL layer and A would in turn call method B in DAL layer... ).
a) Now should one of the bottom layers provide some sort of checking mechanism to ensure that the two ID arguments supplied by UI layer really represent an existing thread and an existing forum or is it the responsibility of UI layer to provide valid ID values?
EDIT:
I would consider the ability to pass invalid IDs a bug.
Should non existing ID be considered a bug just in the case of moving a thread, or also in the case of displaying a thread. Thus when user navigates to page Showthread.aspx?ID={0}, if query string parameter ID references non existing ID, If none of the layers check for the validity of ID, then GridView simply won't display any
"But in this case it doesn't look like the ids are in any sort of list. If they were one could only assume that this would never happen as I assume the lists would be populated by a stored procedure or a DAL procedure that pulls all valid IDs."
But even if user chooses IDs from a set of list, by the time it posts the page back, the DB table containing this ID could be changed in the mean time by admin or whomever?!
View 5 Replies
