In this article I will explain with an example, how to use EmptyResult in ASP.Net MVC Razor.
EmptyResult is a class in ASP.Net MVC whose object is returned in case when NULL value or Nothing needs to be returned from Controller to View in ASP.Net MVC Razor.
Note: For beginners in ASP.Net MVC, please refer my article ASP.Net MVC Hello World Tutorial with Sample Program example.
 
 

Controller

The Controller consists of following Action methods.

Action method for handling GET operation

Inside this Action method, simply the View is returned.
 

Action method for handling AJAX POST operation

This Action method handles the AJAX Form submission and it accepts the value of the Form elements as parameter.
First, a check is performed whether valid Form values have been submitted and if the Form values are valid a BOOLEAN value TRUE is returned else an EmptyResult object (NULL) is returned.
public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }
 
    [HttpPost]
    public ActionResult AjaxMethod(string firstName, string lastName)
    {
        if (!string.IsNullOrEmpty(firstName) && !string.IsNullOrEmpty(lastName))
        {
            string name = string.Format("Name: {0} {1}", firstName, lastName);
            return Json(true);
        }
 
        return new EmptyResult();
    }
}
 
 

View

HTML Markup

The View consists of two TextBox fields created for capturing values for First Name and Last Name.
There’s also an HTML Button at the end of the Table which has been assigned with a JavaScript OnClick event handler.
When the Submit Button is clicked, the value of First Name and Last Name TextBoxes are passed to the AjaxMethod Action method using jQuery AJAX call.
Once the response is received, based on whether response is a BOOLEAN TRUE value or NULL object, appropriate message is displayed using JavaScript Alert Message Box.
@{
     Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <table>
        <tr>
            <td>First Name:</td>
            <td><input type="text" id="txtFirstName" /></td>
        </tr>
        <tr>
            <td>Last Name:</td>
            <td><input type="text" id="txtLastName" /></td>
        </tr>
        <tr>
            <td></td>
            <td><input type="button" value="Submit" onclick="AjaxFormSubmit()" /></td>
        </tr>
    </table>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript" src="https://ajax.cdnjs.com/ajax/libs/json2/20110223/json2.js"></script>
    <script type="text/javascript">
        function AjaxFormSubmit() {
            var person = {};
            person.FirstName = $("#txtFirstName").val();
            person.LastName = $("#txtLastName").val();
            $.ajax({
                 type: "POST",
                 url: "/Home/AjaxMethod",
                 data: JSON.stringify(person),
                 contentType: "application/json; charset=utf-8",
                 dataType: "json",
                 success: function (response) {
                    if (response == true) {
                        alert("Form submitted!");
                    }
                    if (response = null) {
                        alert("Invalid Form data!");
                    }
                }
            });
        }
    </script>
</body>
</html>
 
 

Screenshot

ASP.Net MVC EmptyResult Example: Return NULL (Nothing) from Controller to View
 
 

Browser Compatibility

The above code has been tested in the following browsers.
Microsoft Edge   FireFox  Chrome  Safari  Opera
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Downloads

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