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)

[ExtensionAttribute]
public:
static MvcHtmlString^ RadioButton(
	HtmlHelper^ htmlHelper, 
	String^ name, 
	Object^ value, 
	bool isChecked
)

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
The value of the selected radio button. The value is retrieved in this order - the ModelStateDictionary object, the value of this parameter, the ViewDataDictionary object, and lastly, a value attribute in the html attributes.
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 https://msdn.microsoft.com/en-us/library/bb384936(v=vs.118).aspx or https://msdn.microsoft.com/en-us/library/bb383977(v=vs.118).aspx.

ExceptionCondition
ArgumentException

The name parameter is nullptr or empty.

ArgumentNullException

The value parameter is nullptr.

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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