<EditForm Model="@_data">
    <label>Condition 1 (InputCheckbox):</label>
    <InputCheckbox @bind-Value="@_data.Value1" />
    <br />
    @if (_data.Value1)
    {
        <label>Result 2</label>
        <InputCheckbox DisplayName="Result 2:" @bind-Value="@_data.Value2"></InputCheckbox>
    }
</EditForm>

<h1>TelerikForm</h1>

<TelerikForm Model="@_data">
    <FormItems>
        <FormItem LabelText="Condition 1 (FormItem):" Field="@nameof(_data.Value1)"></FormItem>
        <FormItem>
            <Template>
                <label for="x">Condition 1 (TelerikCheckBox):</label>
                <br />
                <TelerikCheckBox Id="x" @bind-Value="_data.Value1" />
            </Template>
        </FormItem>
        @if (_data.Value1)
        {
            <FormItem LabelText="Result 2:" Field="@nameof(_data.Value2)"></FormItem>
        }
    </FormItems>
</TelerikForm>

@code {
    private ExampleDto _data { get; set; } = new ExampleDto();

    public class ExampleDto
    {
        public string TextValue { get; set; }
        public bool Value1 { get; set; }
        public bool Value2 { get; set; }
    }
}

@inject HttpClient http
@using System.ComponentModel.DataAnnotations

<TelerikForm @ref="@EditForm" 
             Model="@TheCatFactTelerik" 
             ValidationMessageType="@FormValidationMessageType.None">
    <FormValidation>
        <ValidationSummary />
    </FormValidation>
    <FormItems>
        <FormItem Field="fact">
        </FormItem>
    </FormItems>
    <FormButtons>
        <TelerikButton ButtonType="ButtonType.Submit" Primary="true">Apply</TelerikButton>
    </FormButtons>
</TelerikForm>

@code {
    public TelerikForm EditForm { get; set; }

    public CatFact TheCatFactTelerik = new CatFact();

    public EditContext editContext { get; set; }

    protected async override Task OnInitializedAsync()
    {
        TheCatFactTelerik = await http.GetFromJsonAsync<CatFact>("https://catfact.ninja/fact");
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        EditForm.EditContext.AddDataAnnotationsValidation();
    }

    public class CatFact
    {
        [Required(ErrorMessage = "Required Error Text")]
        [MinLength(10, ErrorMessage = "Min Length 10")]
        public string fact { get; set; }
        public int length { get; set; }
    }
}