In this article I will explain with an example, how to perform Client Side validation for RadioButton in ASP.Net MVC Razor using jQuery.
The Client Side validations will be performed using Model class and Data Annotation attributes.
Note: For beginners in ASP.Net MVC, please refer my article ASP.Net MVC Hello World Tutorial with Sample Program example.
 
 

Configuring Bundles and enabling Client Side validations

Please refer the following article for complete information on how to configure Bundles and enable Client Side validation in ASP.Net MVC project.
Using Bundles (ScriptBundle) in ASP.Net MVC Razor
Note: By default the validation done using Data Annotation attributes is Server Side. And hence to make it work Client Side, the Client Side validation must be enabled.
 
 

Model

The following Model class consists of one property Gender. The property is decorated with the following Data Annotation attributes for performing validations.
1. Required Data Annotation attribute.
Note: The Data Annotations attributes can be used with the Entity Data Model (EDM), LINQ to SQL, and other data models.
 
The Required Data Annotation attribute has been specified with a property Error Message with a string value. As the name suggest, this string value will be displayed to the user when the respective validation fails.
public class PersonModel
{
    [Required(ErrorMessage = "Gender is required.")]
    public string Gender { get; set; }
}
 
 

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 POST operation

This action method handles the POST operation and when the form is submitted, the object of the PersonModel class is sent to this method.
public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        return View();
    }
 
    [HttpPost]
    public ActionResult Index(PersonModel person)
    {
        return View();
    }
}
 
 

View

HTML Markup

Inside the View, in the very first line the PersonModel class is declared as Model for the View.
The View consists of an HTML Form which has been created using the Html.BeginForm method with the following parameters.
ActionName – Name of the Action. In this case the name is Index.
ControllerName – Name of the Controller. In this case the name is Home.
FormMethod – It specifies the Form Method i.e. GET or POST. In this case it will be set to POST.
Inside the View, the following three HTML Helper functions are used:-
1. Html.Label – Displaying the text for each RadioButton.
2. Html.RadioButtonFor – Creating a RadioButton for the Model property.
3. Html.ValidationMessageFor – Displaying the Validation message for the property.
There is also Submit button which when clicked, the Form gets submitted.
The jQuery and the jQuery Validation script bundles are rendered at the end of the Model using the Scripts.Render function.
@model RadioButton_Validation_MVC.Models.PersonModel
 
@{
     Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    @using (Html.BeginForm("Index", "Home", FormMethod.Post))
    {
        <table>
            <tr>
                <td>@Html.DisplayFor(m =>m.Gender)</td>
                <td>
                    @Html.Label("Male")
                    @Html.RadioButtonFor(model => model.Gender, "M")
                    @Html.Label("Female")
                    @Html.RadioButtonFor(model =>model.Gender, "F")
                </td>
                <td>@Html.ValidationMessageFor(m => m.Gender, "", new  { @class = "error" })</td>
            </tr>
            <tr>
                <td></td>
                <td><input type="submit" value="Submit" /></td>
                <td></td>
            </tr>
        </table>
    }
</body>
@Scripts.Render("~/bundles/jquery")
@Scripts.Render("~/bundles/jqueryval")
</html>
 
 

Screenshot

Client Side RadioButton validation in ASP.Net MVC Razor using jQuery
 
 

Downloads

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