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InputExtensions.RadioButton Method (HtmlHelper, String, Object)

Returns a radio button input element that is used to present mutually exclusive options.

Namespace:  System.Web.Mvc.Html
Assembly:  System.Web.Mvc (in System.Web.Mvc.dll)

public static MvcHtmlString RadioButton(
	this HtmlHelper htmlHelper,
	string name,
	Object value
)

Parameters

htmlHelper
Type: System.Web.Mvc.HtmlHelper
The HTML helper instance that this method extends.
name
Type: System.String
The name of the form field and the ViewDataDictionary key that is used to look up the value.
value
Type: System.Object
If this radio button is selected, the value of the radio button that is submitted when the form is posted. If the value of the selected radio button in the ViewDataDictionary or the ModelStateDictionary object matches this value, this radio button is selected.

Return Value

Type: System.Web.Mvc.MvcHtmlString
An input element whose type attribute is set to "radio".

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type HtmlHelper. When you use instance method syntax to call this method, omit the first parameter. For more information, see b8020aae-374d-46a9-bcb7-8cc2390b93b6 or 175ce3ff-9bbf-4e64-8421-faeb81a0bb51.

ExceptionCondition
ArgumentException

The name parameter is null or empty.

ArgumentNullException

The value parameter is null.

The difference between calling the RadioButton method and using an input element is that the RadioButton method is designed to make it easy to bind to view data or model data.

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