Question

我有一个似乎无法解决的问题

我有以下模型设置：

public class LogModel
{
    public LogModel()
    {
        this.Log = new List<LogItemModel>();
    }
    public List<LogItemModel> Log { get; set; }
    public TeamModel Winner { get; set; }
    public TeamModel Runnerup { get; set; }
}
public class LogItemModel : BaseModel
{
    public int TeamID { get; set; }
    public string TeamName { get; set; }
    public int TeamPosition { get; set; }
}

在我的视图中显示如下：

@using (Ajax.BeginForm("SubmitLog", new AjaxOptions { OnSuccess = "onSuccess" }))
{
   @model List<MyPredictor.Models.Log.LogItemModel>
   @for (int i = 0; i < Model.Count; i++)
   {

       @Html.HiddenFor(m => m[i].TeamID, new { @class = "selected_team_id", dataposition = i })
       @Html.HiddenFor(m => m[i].TeamName, new { @class = "selected_team_name" })
       @Html.HiddenFor(m => m[i].TeamPosition, new { @class = "selected_team_position", dataposition = i, @value = i })
   }
}

我也在渲染模型的其余部分，但这并不重要，因为它正常工作。为了测试，这是我接受帖子的方法：

[HttpPost]
public JsonResult SubmitLog(LogModel log)
{
    return Json(log);
}

然后，一旦我按下提交按钮，该方法的响应是：

{"Log":[],"Winner":{"ID":1,"Name":"Blues","Image":null},"Runnerup":{"ID":14,"Name":"Stormers","Image":null}}

日志列表总是空的，我不知道为什么。因为如果我查看firebug上的POST选项卡，我可以看到所有发布的值：

%5B0%5D.TeamID=14&%5B0%5D.TeamName=Stormers&%5B0%5D.TeamPosition=1&%5B1%5D.TeamID=13&%5B1%5D.TeamName=Sharks&%5B1%5D.TeamPosition=2&%5B2%5D.TeamID=6&%5B2%5D.TeamName=Crusaders&%5B2%5D.TeamPosition=3&%5B3%5D.TeamID=-1&%5B3%5D.TeamName=&%5B3%5D.TeamPosition=4&%5B4%5D.TeamID=-1&%5B4%5D.TeamName=&%5B4%5D.TeamPosition=5&%5B5%5D.TeamID=-1&%5B5%5D.TeamName=&%5B5%5D.TeamPosition=6&%5B6%5D.TeamID=-1&%5B6%5D.TeamName=&%5B6%5D.TeamPosition=7&%5B7%5D.TeamID=-1&%5B7%5D.TeamName=&%5B7%5D.TeamPosition=8&%5B8%5D.TeamID=-1&%5B8%5D.TeamName=&%5B8%5D.TeamPosition=9&%5B9%5D.TeamID=-1&%5B9%5D.TeamName=&%5B9%5D.TeamPosition=10&%5B10%5D.TeamID=-1&%5B10%5D.TeamName=&%5B10%5D.TeamPosition=11&%5B11%5D.TeamID=-1&%5B11%5D.TeamName=&%5B11%5D.TeamPosition=12&%5B12%5D.TeamID=-1&%5B12%5D.TeamName=&%5B12%5D.TeamPosition=13&%5B13%5D.TeamID=-1&%5B13%5D.TeamName=&%5B13%5D.TeamPosition=14&%5B14%5D.TeamID=-1&%5B14%5D.TeamName=&%5B14%5D.TeamPosition=15&Winner.ID=1&Winner.Name=Blues&Winner.Image=&Runnerup.ID=14&Runnerup.Name=Stormers&Runnerup.Image=&X-Requested-With=XMLHttpRequest

修改

我找到了一个有效的奇怪解决方案，但我不确定它是否理想：

[HttpPost]
public JsonResult SubmitLog(List<MyPredictor.Models.Log.LogItemModel> log, LogModel model)
{
    model.Log = log;
    return Json(model);
}

Answer 1

尝试

[HttpPost]
public JsonResult SubmitLog(List<MyPredictor.Models.Log.LogItemModel> log)
{
    return Json(log);
}

假设您的阵列在表单中正确设置，绑定模型必须是POCO（Plain Old C＃Object）才能使默认绑定器正常工作。

Answer 2

只需替换

@model List<MyPredictor.Models.Log.LogItemModel>

与

@model MyPredictor.Models.Log.LogModel

然后在for：

@for (int i = 0; i < Model.Log.Count; i++)

hiddens：

@Html.HiddenFor(m => m.Log[i].SomeProperty ...

但是，我仍然不知道Winner和Runnerup属性在哪里。

Answer 3

请按照本文明确解释模型绑定并帮助您正确绑定list

http://haacked.com/archive/2008/10/23/model-binding-to-a-list.aspx/

关键是设置正确的索引

<input type="hidden" name="Log.Index" value="cold" />
    <input type="hidden" name="Log[cold].TeamID " value="your value" />
    <input type="hidden" name="Log[cold].TeamName " value="your value" />

此处cold是列表的索引，您可以将任何值设置为索引，但它应该是唯一的。

MVC模型绑定问题

3 个答案: