The smart Trick of view model in asp.net mvc That Nobody is Discussing

The smart Trick of view model in asp.net mvc That Nobody is Discussing

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Your reasoning is questionable and suspect to favoritism. Granted I do know nothing at all about MVVM, however, if an architecture such as MVC can mimic the behavior with-out having to create 50k lines of code, then whats the big deal?

(all I'm sure is They can be accustomed to go some form of knowledge from controller to view) and perhaps inform me on what circumstance must I take advantage of ViewData as an alternative to ViewModel and vice versa

The Product item will come directly from the domain entities created from the Entity Framework. It will take advantage of any validation or other attributes which could happen to be placed on a buddy class.

A more typical and trivial illustration of a view model is actually a login variety: You probably have a website model known as Consumer and you want them to log in. The User area model can be massive and just a little A part of it is required for that authentication. In addition, it has validation logic for the database which doesn't stand for validation logic for your login kind.

Applying ViewModels offers you the pliability to use knowledge as the thing is fit. ViewModels spot generally a more versatile technique to access several facts resources than models + ViewBag/ViewData objects.

ASP.NET MVC view won't be able to have more than one model Therefore if we must Screen Attributes from more than one model from the view, it's impossible. ViewModel serves this purpose.

Let's say I have a page that enables the editing of a person's particulars, so I've a ViewModel similar to this:

(That features things such as SelectLists. Neither your controller nor view should really need to understand how to make a SelectList for the dropdown.)

As an example, your Model may have the subsequent Homes, that happen to be direct representations within your knowledge source:

public class AddViewModel view model in asp.net mvc public int a get; set; community int b get; set; general public int Overall get; set;

Using ViewModels in MVC for finer granularity and much better SoC results in much more simply maintainable and testable code. Recall, device screening is about screening tiny units

Sai AvinashSai Avinash four,7511717 gold badges6262 silver badges9898 bronze badges 4 Do you see the predicted values in the shape selection? I'm not really guaranteed, but because your undertaking an AJAX-postback I think you model is becoming serialized once you do a postback.

Inside the olden times of Website development, developers employed RecordSet objects or even more not long ago DataSets or DataTables as a method to transfer data in the database to some view template. The View template may need been a basic ASP file that contains a mix of HTML and server-aspect code, or a Web Type consisting of databound server controls like a GridView or ListView. Regardless, the data is untyped and dealing with it always contains referring to merchandise by index or by making use of "magic strings" to reference details container values that borrow within the schema of your databases that the information originated from.

Some situations like a lookup desk symbolizing states inside the United states of america, could very easily get the job done with either ViewModels or a ViewBag/ViewData item, so You can find some potential overlap from time to time. It’s as many as the appliance architects and developers to choose what will work greatest with their precise use situation.