無法將模型從視圖傳遞給控制器​​在FormSubmit上

Question

每次此表單都會回發我在我的控制器中將viewmodel視爲null。任何人都可以請幫我，我在這裏失蹤了什麼？

這裏是我的ViewModel

public class CarViewModel 
{ 
    [Required(ErrorMessage = "Please enter the Reg No")] 
    public string RegNo { get; set; } 

    [Required(ErrorMessage = "Please enter Model")] 
    public string CarModel { get; set; } 

    [Required(ErrorMessage = "Please select one of the status")] 
    public int? Status { get; set; } 

    [Required(ErrorMessage = "Please enter colour")] 
    public string Colour { get; set; } 

    public List<SelectListItem> ModelList 
    { 
     get; 
     set; 
    } 

    public List<SelectListItem> Statuses 
    { 
     get; 
     set;   
    } 
} 

這裏是我的控制器

[HttpGet] 
    public ActionResult Create() 
    { 
     CarViewModel model = new CarViewModel(); 
     var statusList = _service.GetAllStatusList(); 
     var modelList = _service.GetAllModelList(); 
     model.Statuses = statusList.Select(x => new SelectListItem 
     { 
      Text = x.description, 
      Value = x.id.ToString() 
     }).ToList(); 

     model.ModelList = modelList.Select(x => new SelectListItem 
     { 
      Text = x.model_name, 
      Value = x.model_id.ToString() 
     }).ToList(); 

     return View(model); 
    } 

    // 
    // POST: /CarRental/Create 
    [HttpPost] 
    [ValidateAntiForgeryToken] 
    public ActionResult Create(CarViewModel model) 
    { 
     try 
     { 
      // TODO: Add insert logic here 
      if (ModelState.IsValid) 
      { 
       car car = new car { colour = model.Colour, registration = model.RegNo, status = model.Status }; 
       _service.RegisterCar(car); 
       return View(model); 
      } 
      else 
      { 
       return View(model); 
      } 
      // return RedirectToAction("Index"); 
     } 
     catch (Exception) 
     { 
      return View(model); 
     } 
    } 

這是我的看法

@model CarRentalUI.Models.CarViewModel 
    @{ 
    ViewBag.Title = "Create"; 
    } 

    <h2>Create</h2> 

    @using (Html.BeginForm("Create","CarRental",FormMethod.Post)) 
    { 
     @Html.AntiForgeryToken() 
     @Html.ValidationSummary(true) 
     @Html.LabelFor(x=>x.RegNo) 
     @Html.TextBoxFor(x=>x.RegNo)   
     @Html.ValidationMessageFor(x=>x.RegNo) 
     <br/> 
     @Html.LabelFor(x=>x.CarModel)   
     @Html.DropDownListFor(x=>x.CarModel,Model.ModelList,"Please Make a Selection") 
     @Html.ValidationMessageFor(x=>x.Model) 

     <br/> 
     @Html.LabelFor(x=>x.Status)   
     @Html.DropDownListFor(x=>x.Status, Model.Statuses,"Please Make a Selection")  
     @Html.ValidationMessageFor(x=>x.Status) 

     <input type="submit" value="Submit" id="submitButton"/> 
    } 

Answer 1

• 取出HiddenFor的
• 確保狀態的值是可解析INT的
• 添加顏色下拉

我只是根據創建了一個測試項目中的示例代碼，它似乎工作（http://i.imgur.com/PIFACMd.png）

Answer 2

使用

return RedirectToAction("Create"); 

而不是

return View(model);