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InputExtensions.RadioButton Method (HtmlHelper, String, Object, Boolean)

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)

static member RadioButton : 
        htmlHelper:HtmlHelper * 
        name:string * 
        value:Object * 
        isChecked:bool -> MvcHtmlString

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.

isChecked
Type: System.Boolean

true to select the radio button; otherwise, false.

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 http://msdn.microsoft.com/en-us/library/bb384936(v=vs.108).aspx or http://msdn.microsoft.com/en-us/library/bb383977(v=vs.108).aspx.

ExceptionCondition
ArgumentException

The name parameter is a null reference (Nothing in Visual Basic) or empty.

ArgumentNullException

The value parameter is a null reference (Nothing in Visual Basic).

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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