单选按钮验证不起作用asp.net core 3.1

<input type="radio" id="option1" name="options" value="1">
<label for="option1">Option 1</label>

<input type="radio" id="option2" name="options" value="2">
<label for="option2">Option 2</label>

[HttpPost]
public IActionResult SubmitForm(MyModel model)
{
    if (ModelState.IsValid)
    {
        // 处理表单提交逻辑
    }
    return View(model);
}

public class MyModel
{
    [Required(ErrorMessage = "请选择一个选项")]
    public int SelectedOption { get; set; }
}

<div asp-validation-summary="All" class="text-danger"></div>

<div class="form-group">
    <label asp-for="SelectedOption"></label>
    <div>
        <input type="radio" asp-for="SelectedOption" value="1" />
        <label asp-for="SelectedOption" class="radio-label">Option 1</label>
    </div>
    <div>
        <input type="radio" asp-for="SelectedOption" value="2" />
        <label asp-for="SelectedOption" class="radio-label">Option 2</label>
    </div>
    <span asp-validation-for="SelectedOption" class="text-danger"></span>
</div>