Should I return ActionResult?

5 Answers. You cannot return anything that’s not an instance of MyDTO , besides throwing an exception. When you use IActionResult you are saying that you may return an instance of MyDTO , but you don’t have to. You can return BadRequest, InternalServerError or whatever suits the API/business needs.

How do I return an ActionResult error?

If you want to show the error in the form user submitted, You may use ModelState. AddModelError method along with the Html helper methods like Html. ValidationSummary etc to show the error to the user in the form he submitted. where you want the errors to display.

How do I return an empty view?

You can return EmptyResult to return an empty view. You can also just return null . ASP.NET will detect the return type null and will return an EmptyResult for you. See MSDN documentation for ActionResult for list of ActionResult types you can return.

How do I return a null in FileResult?

Return NotFound() in FileResult. Just change return type to ActionResult, because FileResult inherits from ActionResult. And then it is possible to return NotFound() e.g. when object equals null.

Should I use ActionResult or IActionResult?

IActionResult is an interface and ActionResult is an implementation of that interface in ASP.NET C#. There are not more different between IActionResult and ActionResult from usability perspective, but since IActionResult is the intended contract for action results, it’s better to use it as opposed to ActionResult.

What does ActionResult return?

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.

What is ContentResult in MVC?

ContentResult represents a user-defined content type. It is inherited from ActionResult. ContentResult has the following three properties: Content that we want to render on browser. ContentEncoding that defines the encoding of the content.

What is an ActionResult C#?

What does JsonResult return?

What is JsonResult ? JsonResult is one of the type of MVC action result type which returns the data back to the view or the browser in the form of JSON (JavaScript Object notation format).

What does IActionResult return?

The IActionResult return type is appropriate when multiple ActionResult return types are possible in an action. The ActionResult types represent various HTTP status codes. Any non-abstract class deriving from ActionResult qualifies as a valid return type.

What is return type in MVC?

Various Return Types From MVC Controller

• System.Web.Mvc.ContentResult.
• System.Web.Mvc.EmptyResult.
• System.Web.Mvc.FileResult.
• System.Web.Mvc.HttpStatusCodeResult.
• System.Web.Mvc.JavaScriptResult.
• System.Web.Mvc.JsonResult.
• System.Web.Mvc.RedirectResult.
• System.Web.Mvc.RedirectToRouteResult.

Can ActionResult return JSON?

Format-specific Action Results Actions can return results that are formatted in a particular format, regardless of client preferences. For example, returning JsonResult returns JSON-formatted data. Returning ContentResult or a string returns plain-text-formatted string data.

How to return no actionresult in ASP.NET?

The action takes the parameter and tries to process. I use a ‘message’ variable to give a visual indication of whether the process succeeds or fails. We return a Json result. This function (declared in our Ajax.BeginForm) then reports the text of our message. If the process fails in the action, we’ll see the exact reason for why it failed.

How to return an actionresult from a controller?

Alternatively, convenience methods in the ControllerBase class can be used to return ActionResult types from an action. For example, return BadRequest (); is a shorthand form of return new BadRequestResult ();.

Is there a way to return nothing with emptyresult?

You can use an EmptyResult to essentially return nothing : However, this is likely not what you want ( as it will simply return nothing ). If you want to just display your current View ( without a Model populating it ), you could use : Thanks Rion. I tried this but the Action is returning the original View as an empty page.

Is the action result a return type in MVC?

In fact, Action Result is a return type. This return type has many other derived types. First, look at the base and derived types of ActionResult. As we see in the Visual Studio, the ActionResult type is coming from System.Web.Mvc assembly. And the problem is that we can’t see inside this assembly with “Go to Definition” feature of Visual Studio.