在Razor上的编辑下拉列表中保留值

public IActionResult Edit(int id)
{
    // 获取下拉列表的数据源
    var options = new List<SelectListItem>
    {
        new SelectListItem { Value = "1", Text = "Option 1" },
        new SelectListItem { Value = "2", Text = "Option 2" },
        new SelectListItem { Value = "3", Text = "Option 3" }
    };

    // 将数据传递给前端视图
    ViewBag.Options = options;

    // 获取之前用户选择的值
    var selectedValue = GetSelectedValueFromDatabase(id);
    ViewBag.SelectedValue = selectedValue;

    return View();
}

<select>
    @foreach (var option in ViewBag.Options)
    {
        <option value="@option.Value" @(option.Value == ViewBag.SelectedValue ? "selected" : "")>@option.Text</option>
    }
</select>