我有一个“部分”工作代码，团队和玩家（以及联结表TeamPlayers）之间存在多对多的关系。 Team和Player端的下拉菜单不起作用。虽然数据存储在db（Player和Team表）中，但不存在于联结表TeamPlayers中。
我希望在我看来有可能将当前玩家和当前团队连接起来，也就是说，将当前TeamId保存到我的联结表中的TeamId（以及PlayerId到PlayerId）。最后一个插入步骤是....我完全陷入困境.... 感谢各种帮助。请参阅下面的代码，并在必要时提出更多要求。提前致谢！ / Tha Pig
模型m2mContext.cs
public class m2mContext : DbContext
{
// You can add custom code to this file. Changes will not be overwritten.
//
// If you want Entity Framework to drop and regenerate your database
// automatically whenever you change your model schema, please use data migrations.
// For more information refer to the documentation:
// http://msdn.microsoft.com/en-us/data/jj591621.aspx
public m2mContext() : base("name=m2mContext")
{
}
public System.Data.Entity.DbSet<m2m.Models.Team> Teams { get; set; }
public System.Data.Entity.DbSet<m2m.Models.Player> Players { get; set; }
}
Model Team.cs
namespace m2m.Models
{
public class Team
{
public int TeamId { get; set; }
[Required]
public string TeamName { get; set; }
public int PlayerId { get; set; }
public virtual ICollection<Player> Players { get; set; } // This is new
}
}
Model Player.cs
namespace m2m.Models
{
public class Player
{
public int PlayerId { get; set; }
public string PlayerName { get; set; }
public int TeamId { get; set; }
// public virtual Team Team { get; set; } // This is new
public virtual ICollection<Team> Teams { get; set; }
}
}
Controller TeamController.cs
namespace m2m.Controllers
{
public class TeamController : Controller
{
private m2mContext db = new m2mContext();
// GET: Team
public ActionResult Index()
{
return View(db.Teams.ToList());
}
// GET: Team/Details/5
public ActionResult Details(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Team team = db.Teams.Find(id);
if (team == null)
{
return HttpNotFound();
}
return View(team);
}
// GET: Team/Create
public ActionResult Create()
{
return View();
}
// POST: Team/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "TeamId,TeamName,PlayerId")] Team team)
{
if (ModelState.IsValid)
{
db.Teams.Add(team);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(team);
}
Controller PlayerController.cs
namespace m2m.Controllers
{
public class PlayerController : Controller
{
private m2mContext db = new m2mContext();
// GET: Player
public ActionResult Index()
{
return View(db.Players.ToList());
}
// GET: Player/Details/5
public ActionResult Details(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Player player = db.Players.Find(id);
if (player == null)
{
return HttpNotFound();
}
return View(player);
}
// GET: Player/Create
public ActionResult Create()
{
return View();
}
// POST: Player/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "PlayerId,PlayerName,TeamId")] Player player)
{
if (ModelState.IsValid)
{
db.Players.Add(player);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(player);
}
查看团队
创建
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
<h4>Team</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(model => model.TeamName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.TeamName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.TeamName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.PlayerId, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.PlayerId, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.PlayerId, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</div>
</div>
}
查看播放器
创建
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
<h4>Player</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(model => model.PlayerName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.PlayerName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.PlayerName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.TeamId, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.TeamId, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.TeamId, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</div>
</div>
}
答案 0 :(得分：0)
由于我的代表，我无法发表评论，所以我会发布一个可能的答案。
我会将TeamPlayers添加到模型中，向玩家和/或团队控制器添加一个方法，将它们添加到TeamPlayer。
public System.Data.Entity.DbSet<m2m.Models.TeamPlayer> TeamPlayer{ get; set; }
在控制器中
public ActionResult AddtoTeam(int? Teamid)
public ActionResult AddPlayer(int? Playerid)
不完全确定这是你想要的。
答案 1 :(得分：0)
问题是您发布到了属性PlayerId / TeamId。这是一个M2M，因此这些领域不做任何事情。您必须提供一个多选项，最终将发布一个ID列表。然后，您可以使用此发布的ID列表从数据库中查找玩家/团队，并将其添加到各自的馆藏中。