Blazor RadioGroup Overview

The Blazor RadioGroup component allows the user to select an option from a predefined set of choices in a list of radio buttons. The radio group is styled according to the Telerik Theme. You can also choose the layout order and label position.

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Creating Blazor RadioGroup

  1. Add the <TelerikRadioGroup> tag to a Razor file.

  2. Populate its Data property with the collection of items you want in the list.

  3. Set the Value parameter to an object. It supports one-way and two-way binding.

  4. Set the TextField and ValueField properties to point to the corresponding properties of the model.

Basic Radio Button Group configuration.

Chosen gender: @( ChosenGender == 0 ? "no selection yet" : ChosenGender.ToString() )
<br />

<TelerikRadioGroup Data="@GenderOptions"
                   @bind-Value="@ChosenGender"
                   ValueField="@nameof(GenderModel.GenderId)"
                   TextField="@nameof(GenderModel.GenderText)">
</TelerikRadioGroup>

@code{
    TelerikRadioGroup<GenderModel, int?> RadioGroupRef { get; set; }

    int ChosenGender { get; set; }

    List<GenderModel> GenderOptions { get; set; } = new List<GenderModel>
    {
        new GenderModel { GenderId = 1, GenderText = "Female" },
        new GenderModel { GenderId = 2, GenderText = "Male" },
        new GenderModel { GenderId = 3, GenderText = "Other" },
        new GenderModel { GenderId = 4, GenderText = "Prefer not to say" },
    };

    public class GenderModel
    {
        public int GenderId { get; set; }
        public string GenderText { get; set; }
    }
}

Data Binding

The Blazor RadioGroup supports data binding to primitive types and a model. Read more about the Blazor RadioGroup data binding.

Layout

The RadioGroup component provides two ways to render the list of options - in a vertical or in a horizontal fashion. Read more about the Blazor RadioGroup layouts.

Label Position

The RadioGroup component provides two ways to render the labels of the radio buttons - before or after the radio buttons. Read more about the Blazor RadioGroup label position.

Appearance Settings

The Blazor RadioGroup provides a Size parameter to customize the radio button dimensions. Read more about the Blazor RadioGroup appearance settings.

Events

The Blazor RadioGroup fires blur and value change events to respond to user actions. Read more about the Blazor RadioGroup events.

RadioGroup Parameters

The Blazor RadioGroup provides various parameters to configure the component. Also check the RadioGroup public API.

Parameter Type and Default Value Description
Class string The custom CSS class for the main wrapping element, which is <ul class="k-radio-list">.
Enabled bool
(true)
Whether the component is enabled.
Id string The id attribute of the main wrapping element.
LabelPosition RadioGroupLabelPosition enum
(After)
Whether the labels render after or before the radio button itself.
Layout RadioGroupLayout enum
(Vertical)
Whether the buttons are rendered vertically or horizontally.
Name string Sets a name attribute to the <input type="radio"> elements.
TItem object The type of the model to which the component is bound. Required if you can't provide Data or Value. Determines the type of the reference object.
TValue object The type of the value field from the model to which the component is bound. Required if you can't provide Data or Value. Determines the type of the reference object.
TextField string
(Text)
The name of the field from the model that will be shown to the user.
ValueField string
(Value)
The name of the field from the model that will populate the underlying Value.
Value object The value of the component. Supports one and two-way binding. If the Value matches a ValueField value in the Data, the corresponding item from the data will be pre-selected.

See the Input Validation article for more details.

Next Steps

See Also

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