Concentrix Frequently Asked ASP.NET MVC Interview Questions

Can I Use Razor Code In Javascript In Asp.net Mvc?

Yes. We can use the razor code in javascript in cshtml by using <text> element.

< script type="text/javascript">

@foreach (var item in Model) {

< text >

//javascript goes here which uses the server values

< text >

}

< script>

How Can I Return String Result From Action In Asp.net Mvc?

Below is the code snippet to return string from action method

public ActionResult TestAction() {

return Content("Hello Test !!");

}

What Are Ajax Helpers In Asp.net Mvc?

AJAX Helpers are used to create AJAX enabled elements like as Ajax enabled forms and links which performs the request asynchronously and these are extension methods of AJAXHelper class which exists in namespace - System.Web.ASP.Net MVC.

Concentrix Most Frequently Asked ASP.NET MVC Interview Questions Answers

Explain Sections Is Asp.net Mvc?

Section are the part of HTML which is to be rendered in layout page. In Layout page we will use the below syntax for rendering the HTML

@RenderSection("TestSection") And in child pages we are defining these sections as shown below

@section TestSection{

<h1>Test Content<h1>

} If any child page does not have this section defined then error will be thrown so to avoid that we can render the HTML like this

@RenderSection("TestSection", required: false)

How To Change The Action Name In Asp.net Mvc?

"ActionName" attribute can be used for changing the action name.

Below is the sample code snippet to demonstrate more

[ActionName("TestActionNew")]

public ActionResult TestAction()

    {

       return View();

    }

So in the above code snippet "TestAction" is the original action name and in "ActionName" attribute, name - "TestActionNew" is given. So the caller of this action method will use the name "TestActionNew" to call this action.

What Are Code Blocks In Views?

Unlike code expressions that are evaluated and sent to the response, it is the blocks of code that are executed. This is useful for declaring variables which we may be required to be used later.

@{

 int x = 123;

 string y = "aa";

 }

What Is The "helper Page.isajax" Property?

The Helper Page.IsAjax property gets a value that indicates whether Ajax is being used during the request of the Web page.

Can You Explain Renderbody And Renderpage In Asp.net Mvc?

RenderBody is like ContentPlaceHolder in web forms. This will exist in layout page and it will render the child pages/views. Layout page will have only one RenderBody() method. RenderPage also exists in Layout page and multiple RenderPage() can be there in Layout page.

What Is Viewstart Page In Asp.net Mvc?

This page is used to make sure common layout page will be used for multiple views. Code written in this file will be executed first when application is being loaded.

Explain The Methods Used To Render The Views In Asp.net Mvc?

Below are the methods used to render the views from action -

View() : To return the view from action.

PartialView() : To return the partial view from action.

RedirectToAction() : To Redirect to different action which can be in same controller or in different controller.

Redirect() : Similar to "Response.Redirect()" in webforms, used to redirect to specified URL.

RedirectToRoute() : Redirect to action from the specified URL but URL in the route table has been matched.

What Are The Sub Types Of Actionresult?

ActionResult is used to represent the action method result. Below are the subtypes of ActionResult

ViewResult
PartialViewResult
RedirectToRouteResult
RedirectResult
JavascriptResult
JSONResult
FileResult
HTTPStatusCodeResult

What Are Non Action Methods In Asp.net Mvc?

In ASP.Net MVC all public methods have been treated as Actions. So if you are creating a method and if you do not want to use it as an action method then the method has to be decorated with "NonAction" attribute as shown below

[NonAction]

public void TestMethod()

{

// Method logic

}