ASP.NET MVC Model Binder返回空对象

我遇到一个问题，每次我发布表单回到控制器动作的[HttpPost]版本时，ModelBinder都会返回一个空对象。我无法弄清楚为什么。如果我将签名更改为使用FormCollection，则可以看到所有正确的密钥都已设置。有人能帮我指出这里有什么问题，因为我无法发现它。ASP.NET MVC Model Binder返回空对象

这里是模型我的看法

public class DeviceModel 
{ 
    public int Id { get; set; } 

    [Required] 
    [Display(Name = "Manufacturer")] 
    public int ManufacturerId { get; set; } 

    [Required] 
    [Display(Name = "Model")] 
    [StringLength(20)] 
    public string Model { get; set; } 

    [StringLength(50)] 
    [Display(Name = "Name")] 
    public string Name { get; set; } 

    [StringLength(50)] 
    [Display(Name = "CodeName")] 
    public string CodeName { get; set; } 

    public int? ImageId { get; set; } 
} 

public class DeviceCreateViewModel : DeviceModel 
{ 
    public IEnumerable<SelectListItem> Manufacturers { get; set; } 
}

，我在我的控制器使用像这样的工作：

public ActionResult Create() 
{ 
    DeviceCreateViewModel viewModel = new DeviceCreateViewModel() 
              { 
               Manufacturers = ManufacturerHelper.GetSortedManufacturersDropDownList() 
              }; 

    return View(viewModel); 
} 

[HttpPost] 
public ActionResult Create(DeviceModel model) 
{ 
    // if I check model here it is NULL 
    return View(); 
}

和视图看起来是这样的：

@model TMDM.Models.DeviceCreateViewModel 

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script> 

@using (Html.BeginForm()) { 
    @Html.ValidationSummary(true) 
    <fieldset> 

     <div class="editor-label"> 
      @Html.LabelFor(model => model.ManufacturerId) 
     </div> 
     <div class="editor-field"> 
      @Html.DropDownList("ManufacturerId", Model.Manufacturers) 
      @Html.ValidationMessageFor(model => model.ManufacturerId) 
     </div> 

     <div class="editor-label"> 
      @Html.LabelFor(model => model.Model) 
     </div> 
     <div class="editor-field"> 
      @Html.EditorFor(model => model.Model) 
      @Html.ValidationMessageFor(model => model.Model) 
     </div> 

     <div class="editor-label"> 
      @Html.LabelFor(model => model.Name) 
     </div> 
     <div class="editor-field"> 
      @Html.EditorFor(model => model.Name) 
      @Html.ValidationMessageFor(model => model.Name) 
     </div> 

     <div class="editor-label"> 
      @Html.LabelFor(model => model.CodeName) 
     </div> 
     <div class="editor-field"> 
      @Html.EditorFor(model => model.CodeName) 
      @Html.ValidationMessageFor(model => model.CodeName) 
     </div> 

     <p> 
      <input type="submit" value="Save" class="medium green awesome" /> 
      @Html.ActionLink("Cancel", "Index", "Device", null, new { @class="medium black awesome" }) 
     </p> 
    </fieldset> }

来源

2011-09-22 Chris

问题是类中名为Model的属性之间存在名称冲突DeviceModel和Create操作中名为model的变量。名称冲突导致DefaultModelBinder失败，因为它会尝试将Model属性绑定到DeviceModel类。

将创建操作中变量的名称更改为deviceModel，并且它将正确绑定。

来源

2011-09-22 02:50:45 counsellorben

工作感谢！但为什么名称模型适用于另一个接受HttpPost数据的控制器？ – Chris

该动作的模型是否也有一个名为Model的属性？它在这里失败的原因是因为名称冲突。 – counsellorben

对不起，我实际上误解了你之前说的，但我现在清楚了。感谢您的帮助。 – Chris

ASP.NET MVC Model Binder返回空对象

回答

相关问题