使用HtmlHelper类时,MVC单选按钮列表未分组

@{
    var radioList = new List<SelectListItem>
    {
        new SelectListItem { Text = "选项1", Value = "1" },
        new SelectListItem { Text = "选项2", Value = "2" },
        new SelectListItem { Text = "选项3", Value = "3" }
    };
}

@Html.RadioButtonFor(m => m.SelectedOption, radioList[0].Value, new { id = "option1", name = "optionGroup" })
<label for="option1">@radioList[0].Text</label>

@Html.RadioButtonFor(m => m.SelectedOption, radioList[1].Value, new { id = "option2", name = "optionGroup" })
<label for="option2">@radioList[1].Text</label>

@Html.RadioButtonFor(m => m.SelectedOption, radioList[2].Value, new { id = "option3", name = "optionGroup" })
<label for="option3">@radioList[2].Text</label>