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IHtmlHelper.RadioButton Method

Definition

Namespace:
Microsoft.AspNetCore.Mvc.Rendering
Assembly:
Microsoft.AspNetCore.Mvc.ViewFeatures.dll
Package:
Microsoft.AspNetCore.Mvc.ViewFeatures v1.0.0
Package:
Microsoft.AspNetCore.Mvc.ViewFeatures v1.1.0
Package:
Microsoft.AspNetCore.App.Ref v10.0.0-preview.7.25380.108
Package:
Microsoft.AspNetCore.Mvc.ViewFeatures v2.0.0
Package:
Microsoft.AspNetCore.Mvc.ViewFeatures v2.1.0
Package:
Microsoft.AspNetCore.Mvc.ViewFeatures v2.2.0
Package:
Microsoft.AspNetCore.App.Ref v3.0.1
Package:
Microsoft.AspNetCore.App.Ref v3.1.10
Package:
Microsoft.AspNetCore.App.Ref v5.0.0
Package:
Microsoft.AspNetCore.App.Ref v6.0.6
Package:
Microsoft.AspNetCore.App.Ref v7.0.5
Package:
Microsoft.AspNetCore.App.Ref v8.0.19
Package:
Microsoft.AspNetCore.App.Ref v9.0.8
Source:
IHtmlHelper.cs

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.

Applies to