What does ActionResult return?

What is an ActionResult? An ActionResult is a return type of a controller method, also called an action method, and serves as the base class for *Result classes. Action methods return models to views, file streams, redirect to other controllers, or whatever is necessary for the task at hand.

How do I return null ActionResult?

There are two ways to return NULL from an ActionResult (Action Method): 1. Using EmptyResult class. In order to learn more about EmptyResult class, please refer my article ASP.Net MVC EmptyResult Example: Return NULL (Nothing) from Controller to View.

Can ActionResult return string?

You can’t return a string from a method which returns an ActionResult, so in this case you return Content(“”) as swilliams explained.

What is JavaScript result in MVC?

JavaScript result sends JavaScript content to the response. Here we create one div element in the index. cshtml page. We write some text inside the div element. In the JavaScript result method we get a div element and update its content using JavaScript.

What should I return in ActionResult?

ActionResult is a return type of a controller method in ASP.NET MVC. It help us to return models to views, other return value, and also redirect to another controller’s action method. There are many derived ActionResult types in MVC that we use to return the result of a controller method to the view.

How do I return an ActionResult model?

Index(). ViewData. Model; If your method signature’s return type is ActionResult instead of ViewResult, you will need to cast it to ViewResult first.

CAN controller return null?

If a controller returns a null view name, or declares a void return type, Spring will attempt to infer the view name from the request URL. In your case, it will assume the view name is form , and proceed on that assumption.

Should API return null or empty string?

If you want to split your workflow and more explicitly capture when something is not set, use null. If you would rather the program just keep doing as it does, use an empty string. The important thing is that you are consistent, pick a common return and stick with that.

What is RedirectResult in MVC?

RedirectResult. RedirectResult is an ActionResult that returns a Found (302), Moved Permanently (301), Temporary Redirect (307), or Permanent Redirect (308) response with a Location header to the supplied URL. It will redirect us to the provided URL, it doesn’t matter if the URL is relative or absolute.

What is a controller JavaScript?

A controller is a JavaScript object that contains attributes/properties, and functions. Each controller accepts $scope as a parameter, which refers to the application/module that the controller needs to handle.

Should API return null or empty String?

How do I restrict the API to return JSON response?

Let’s explore them:

1. Change the default formatter for Accept: text/html to return JSON.
2. Change the default formatter for Accept: text/html to return JSON, and also return a valid Content-Type: application/json header.
3. Completely remove the XML formatter, forcing ASP.NET Web API to return JSON by default.

What happens if you send a null value in an API call?

If a “NULL” is passed in the JSON, we get NULL in the object, but any other field that is not passed is NULL as well. Therefore we cannot distinguish which field can be deleted and which field cannot be touched. The complete object is sent.

How do you handle a null response in JSON?

Handling JSON null and empty arrays and objects

1. id – If the property is defined as nillable in the schema, then it will be set to null.
2. firstName – The null value is set on the property.
3. address – If the property is defined as nillable in the schema, then it will be set to null.