将ID从下拉列表传递到HttpPost中的实体对象

如何解决将ID从下拉列表传递到HttpPost中的实体对象

我想从用户在下拉列表中选择的类型中获取GenreID，并将id值提供给我的实体对象相册。

这是模型：

public class AlbumsModel
{
   public Albums Albums { get; set; }
   public SelectList GenreList{get;set;}
}

控制器中的操作方法：

public ViewResult Edit(int albumID)
{          
    var albums = repository.GetAllAlbums().ToList();          
    AlbumsModel viewA = new AlbumsModel
    {
       Albums = albums
       .Where(a => a.AlbumID == albumID),};
    viewA.GenreList=new 
    SelectList(repository.Genre.ToList(),"GenreID",Genres");
    return View(viewA);
}

//Http post method:

[HttpPost]
public ActionResult Edit(AlbumsModel albummodel,HttpPostedFileBase image=null)
{
    Domain.Entities.Albums album = new Albums
    {
        AlbumID = albummodel.Albums.AlbumID,AlbumTitle = albummodel.Albums.AlbumTitle,Artists = albummodel.Albums.Artists,Price = albummodel.Albums.Price,ImageData = albummodel.Albums.ImageData,ImageMimeData = albummodel.Albums.ImageMimeData,GenreID = albummodel.Albums.GenreID,};
    if (ModelState.IsValid)

Edit.cshtml（视图）：

@* some other code*@
@Html.DropDownList("Genres",Model.GenreList,"Select a Genre")