错误的 select 标记呈现 ID - asp-for 属性

Question

下面是我的代码

namespace Cinema.WebCore.Pages.MovieDateHall
{
public class CreateModel : PageModel
{
    private readonly Cinema.WebCore.Data.CinemaContext _context;

    public CreateModel(Cinema.WebCore.Data.CinemaContext context)
    {
        _context = context;
    }

    [BindProperty]
    public SelectList Movies { get; set; }

    public IActionResult OnGet()
    {
        MovieDateHallSeats movieDateHall = new MovieDateHallSeats();
        movieDateHall.Movies = _context.Movies.ToList();

        Movies = new SelectList(movieDateHall.Movies, "Id", "MovieTitle");

        return Page();
    }

}
}

前端代码为

@page

@model Cinema.WebCore.Pages.MovieDateHall.CreateModel

<select asp-for="Movies" asp-items="Model.Movies">
   <option value="">Pick one</option>
</select>

它可以工作，但是 select 标签的渲染输出有 multiple=multiple，这不是我需要的。

<select id="Movies" multiple="multiple" name="Movies"> <option value="">Pick one</option> <option value="1">Matrix</option> </select>

我需要的是...

<select id="MovieId" name="Movies"> <option value="">Pick one</option> <option value="1">Matrix</option> </select>

我在代码隐藏处的绑定不正确吗？

[BindProperty]
public SelectList Movies { get; set; }

Answer 1

你需要再来一个属性

   public string SelectedMovie {get;set;}

并将其用于 asp-for

Answer 2

我认为您使用 select 的方式有误。对于 asp-for 你应该把你的属性 handles selected value

<select asp-for="MovieId" asp-items="Model.Movies">
   <option value="">Pick one</option>
</select>

示例：

public class Product
{
    public int Id { get; set; }
    public string Name { get; set; }
    public int Price { get; set; }

    public int CompanyId { get; set; }
    public Company Company { get; set; }
}

///

form asp-action="Create" asp-controller="Home"  asp-antiforgery="true">
    <div>
        <div>
            <label asp-for="Name"></label>
            <input type="text" asp-for="Name" />
        </div>
        <div>
            <label asp-for="Price"></label>
            <input asp-for="Price" />
        </div>
        <div>
            <label asp-for="CompanyId"></label>
            <select asp-for="CompanyId" asp-items="ViewBag.Companies"></select>
        </div>
        <div>
            <input type="submit" value="Save" />
        </div>
    </div>
</form>

错误的 select 标记呈现 ID - asp-for 属性

Wrong select tag rendered id - asp-for property

c#

asp.net-core

razor-pages