IHtmlHelper.RadioButton Method

Definition

Namespace:

Microsoft.AspNetCore.Mvc.Rendering

Assembly:

Microsoft.AspNetCore.Mvc.ViewFeatures.dll

Package:

Microsoft.AspNetCore.App.Ref v8.0.0

Returns an <input> element of type "radio" for the specified expression. Adds a "value" attribute to the element containing the first non-null value found in: the value parameter, or the htmlAttributes dictionary entry with key "value". Adds a "checked" attribute to the element if value matches the first non-null value found in: the htmlAttributes dictionary entry with key "checked", the ModelState entry with full name, the ViewData entry with full name, or the expression evaluated against Model. If isChecked is non-null, instead uses the first non-null value found in: the ModelState entry with full name, or the isChecked parameter. See Name(String) for more information about a "full name".

public:
 Microsoft::AspNetCore::Html::IHtmlContent ^ RadioButton(System::String ^ expression, System::Object ^ value, Nullable<bool> isChecked, System::Object ^ htmlAttributes);

public Microsoft.AspNetCore.Html.IHtmlContent RadioButton (string expression, object value, bool? isChecked, object htmlAttributes);

abstract member RadioButton : string * obj * Nullable<bool> * obj -> Microsoft.AspNetCore.Html.IHtmlContent

Public Function RadioButton (expression As String, value As Object, isChecked As Nullable(Of Boolean), htmlAttributes As Object) As IHtmlContent

Parameters

expression

String

Expression name, relative to the current model.

value

Object

If non-null, value to include in the element. Must not be null if isChecked is also null and no "checked" entry exists in htmlAttributes.

isChecked

Nullable<Boolean>

If true, radio button is initially selected. Must not be null if value is also null and no "checked" entry exists in htmlAttributes.

htmlAttributes

Object

An Object that contains the HTML attributes for the element. Alternatively, an IDictionary<TKey,TValue> instance containing the HTML attributes.

Returns

IHtmlContent

A new IHtmlContent containing the <input> element.

Remarks

Combines HtmlFieldPrefix and expression to set <input> element's "name" attribute. Sanitizes expression to set element's "id" attribute.