asp.net mvc5 - 传递选择的列表项的ID回控制器

我有一个包含我使用的下拉列表视图中的信息视图模型：asp.net mvc5 - 传递选择的列表项的ID回控制器

public class AddPlayersToGame 
{ 
    public string GameTitle { set; get; } 
    public int GameID { set; get; } 
    public List<SelectListItem> Players { set; get; } 
    public int PlayerID { get; set; } 
    public int[] SelectedPlayers { set; get; } 
}

这是我的看法，其简单地显示包含运动员列表以选择从下拉列表：

@model WebGameProj.ViewModels.AddPlayersToGame 
<div> 
{ 
    @Html.DropDownListFor(x => Model.PlayerID, Model.Players) 

    <input type="submit" /> 
} 
</div>

这是控制器的方法我使用：

public ActionResult AddPlayersView(int id) 
{ 
    var GameSelected = db.Games.Find(id); 

    if (GameSelected== null) 
    { 
     return HttpNotFound(); 
    } 

    var np = new AddPlayersToGame { GameID = id, GameTitle = GameSelected.GameTitle }; 

    np.Players = db.Players.Select(m => new SelectListItem 
    { 
     Text = m.PlayerUserName, 
     Value = m.PlayerId.ToString() 
    }).ToList(); 

    return View(np); 
} 

[HttpPost] 
public ActionResult AddPlayersView(AddPlayersToGame model) 
{ 
    foreach (var item in model.SelectedPlayers) 
    { 
     var SelPlayer = db.Players.Find(model.PlayerID); 

     if (SelPlayer== null) 
     { 
      return new HttpStatusCodeResult(HttpStatusCode.BadRequest); 
     } 

     if (SelPlayer != null) 
     { 
      Game GameSelected = new Game(); 
      GameSelected.GamePlayers.Add(SelPlayer); 

      db.Entry(GameSelected).State = EntityState.Modified; 
      db.SaveChanges(); 
     } 
    } 
    return RedirectToAction("GameDetailsView"); 
}

所以，基本上我想有一个显示玩家下拉列表的视图，当某些玩家被选中后，post方法将通过使用他们的id通过下拉菜单返回来找到数据库上的每个玩家列表中，然后将它们添加到该游戏的当前玩家列表中。

来源

2016-02-19 CianGallagher

您可以使用jQuery用于获取所选的ID。 –

你尝试过搜索类似的东西吗？说是否[这]（http://stackoverflow.com/questions/25013223/asp-net-mvc-multiple-select-dropdown）帮助？ – Andrei

您只能在下拉列表中一次选择一个项目。您需要使用多选下拉列表（jQuery UI具有多选列表）才能达到此目的。 – ataravati

模型更改为

public class AddPlayersToGame 
{ 
    public string GameTitle { set; get; } 
    public int GameID { set; get; } 
    public int PlayerID { get; set; } 
    public int[] PlayerIds { set; get; } 
    public List<SelectListItem> Players { set; get; } 
}

而且你以

@model WebGameProj.ViewModels.AddPlayersToGame 
<div> 
{ 
    @Html.ListBoxFor(x => x.PlayerIds, Model.Players) 

    <input type="submit" /> 
} 
</div>

那么你应该在模型中选择IDS提交后。

来源

2016-02-19 15:47:01 McNultyyy

你还可以尝试：

型号

public class AddPlayersToGame 
{ 
    public string GameTitle { set; get; } 
    public int GameID { set; get; } 
    public int[] PlayerIDs { get; set; } 
    public MultiSelectList Players { get; set; } 
}

控制器

public ActionResult AddPlayersView(int id) 
{ 
    var GameSelected = db.Games.Find(id); 

    if (GameSelected== null) 
    { 
     return HttpNotFound(); 
    } 

    var np = new AddPlayersToGame { GameID = id, GameTitle = GameSelected.GameTitle }; 

    var playerList = db.Players.Select(m => new 
    { 
     PlayerUserName = m.PlayerUserName, 
     PlayerId = m.PlayerId 
    }).ToList(); 

    np.Players = new MultiSelectList(playerList, "PlayerIDs", "PlayerUserName"); 
    return View(np); 
} 

[HttpPost] 
public ActionResult AddPlayersView(AddPlayersToGame model) 
{ 
    foreach (var playerID in model.PlayerIDs) 
    { 
     var SelPlayer = db.Players.Find(playerID); 

     if (SelPlayer== null) 
     { 
      return new HttpStatusCodeResult(HttpStatusCode.BadRequest); 
     } 

     if (SelPlayer != null) 
     { 
      Game GameSelected = new Game(); 
      GameSelected.GamePlayers.Add(SelPlayer); 

      db.Entry(GameSelected).State = EntityState.Modified; 
      db.SaveChanges(); 
     } 
    } 
    return RedirectToAction("GameDetailsView"); 
}

查看

@model WebGameProj.ViewModels.AddPlayersToGame 

<div> 
{ 
    @Html.ListBoxFor(x => x.PlayerIDs, Model.Players) 
    <input type="submit" /> 
} 
</div>

来源

2016-02-19 17:25:23 JimmyBytes

asp.net mvc5 - 传递选择的列表项的ID回控制器

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