view model in asp.net mvc - An Overview

view model in asp.net mvc - An Overview

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public class ProjectViewModel                      public string Name   get; established;              general public string Surname   get; set;              general public int Age   get; established;              general public string Role   get; set;              general public string ProjectName   get; established;          

(all I know is They can be utilized to go some form of information from controller to view) and maybe inform me on what problem really should I use ViewData instead of ViewModel and vice versa

For the reason that we also render the Edit view template through the HTTP-POST Edit system (in scenarios when glitches happen), we'll want to ensure that we also update this method to incorporate the SelectList to ViewData if the view template is rendered in error eventualities:

For scenarios where by this is not the situation, a person option that you could use is to make a custom made-shaped ViewModel class whose item model is much more optimized for usage through the view – and which might appear wholly distinctive within the fundamental domain model object.

Although accomplishing this we'll examine two techniques that could be used to pass facts from controllers to views: ViewData and ViewModel.

ASP.Internet MVC view cannot have multiple model so if we must Show Houses from more than one model from the view, it is actually not possible. ViewModel serves this function.

The Html.DropDownList() helper strategy previously mentioned will take two parameters. The 1st would be the name from the HTML form ingredient to output. The 2nd would be the "SelectList" model we passed through the ViewData dictionary. We are using the C# "as" search phrase to Solid the type inside the dictionary as a SelectList.

If you want figure out extra methods to move multiple models to your view you are able to have a look at this write-up which post.

Among the list of key reasons for This can be that it is A fast path to making demo-code. And often it'd even be ideal the place the program being developed is one which mostly offers a CRUD software above those entities. If you want to make or update a Group in Northwind, all you really need is often a CategoryName and Description assets.

Pass the View Model to your View: Go the populated view model into the view from the controller view model in asp.net mvc utilizing the View overloaded system, which usually takes the model object as being a parameter.

The identify of the class is derived through the identify and site of the View file, and inherits from WebViewPage, and it is this that provides the solid-typing and IntelliSense support etc. If no View Model form is ready in a model directive, the type which is applied in its place is dynamic:

The real earth, on the other hand, is infrequently as simple. Commonly, Views are intricate and contain artefacts from multiple domain entity. And perhaps merely a subset of any entity's Qualities. The answer is to make a course whose sole position is always to work as a container for a particular View's data. Or simply a Model for that View, if you are going to, or a View Model.

I then make a checklist object of variety ProjectViewModel to carry the information from both of those the Project and Employee entities.

 We are going to develop a strongly typed view by picking the Model course ProjectViewModel and we want to make a List. The scaffold mechanism will create our view you can see beneath. As you could see down below in the initial line of your view I pass the ProjectViewModel ViewModel.