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我有問題讓我的創建功能正常工作。我正在嘗試創建一個Order對象，其中包含一個SalesPerson和Customer對象。我的訂單模型看起來像MVC創建頁面返回異常
public class Order
{
public int ID { get; set; }
public SalesPerson SalesPerson { get; set; }
public bool PreviousWork { get; set; }
public OrderStatus Status { get; set; }
public Customer Customer { get; set; }
public List<OrderLineItem> LineItems { get; set; }
}
我再創建一個視圖模型：
public class OrderViewModel
{
private sunburstdb db = new sunburstdb();
public Order originalOrder { get; set; }
public IList<SelectListItem> SalesPeopleList { get; set; }
public IList<SelectListItem> CustomersList { get; set; }
public IList<SelectListItem> OrderStatusList { get; set; }
public OrderViewModel(Order order)
{
originalOrder = order;
}
}
在我的控制器我有以下幾點：
//
// GET: /Order/Create
public ActionResult Create()
{
Order order = new Order();
OrderViewModel viewModel = new OrderViewModel(order);
//IList<SelectListItem> result = new List<SelectListItem>();
viewModel.SalesPeopleList = new List<SelectListItem>();
foreach (SalesPerson person in db.SalesPeople)
{
var temp = new SelectListItem();
temp.Text = person.FullName;
temp.Value = person.ID.ToString();
viewModel.SalesPeopleList.Add(temp);
}
//viewModel.SalesPeopleList = new SelectList(result);
//result.Clear();
viewModel.CustomersList = new List<SelectListItem>();
foreach (Customer person in db.Customers)
{
var temp = new SelectListItem();
temp.Text = person.FullName;
temp.Value = person.ID.ToString();
viewModel.CustomersList.Add(temp);
}
//viewModel.CustomersList = new SelectList(result);
return View(viewModel);
}
//
// POST: /Order/Create
[HttpPost]
public ActionResult Create(Order order)
{
if (ModelState.IsValid)
{
db.Orders.Add(order);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(order);
}
最後我的看法是非常標準的一對夫婦字段按順序填充數據。
@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
<legend>Order</legend>
<div class="editor-label">
@Html.LabelFor(model => model.originalOrder.SalesPerson)
</div>
<div class="editor-field">
@Html.DropDownList("Order.SalesPerson", Model.SalesPeopleList)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.originalOrder.Customer)
</div>
<div class="editor-field">
@Html.DropDownList("Order.Customer", Model.CustomersList);
</div>
<div class="editor-label">
@Html.LabelFor(model => model.originalOrder.PreviousWork)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.originalOrder.PreviousWork)
@Html.ValidationMessageFor(model => model.originalOrder.PreviousWork)
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
當我運行這一點，並嘗試創建一個新的訂單，我得到以下幾點：傳遞到字典的模型項的類型爲「Models.Order」，但這部詞典需要類型的模型」模型項.OrderViewModel」。我想也許我需要將create方法中的參數更改爲public ActionResult Create(OrderViewModel order)但是，當我這樣做時，錯誤是：沒有爲此對象定義的無參數構造函數。有人可以幫助MVC Noob瞭解我做錯了什麼嗎？
視圖頂部是否沒有@model行？如果是這樣，請編輯添加。 – 2012-03-13 15:20:16
是的，有一個@model，我沒有包含整個視圖文件。 – azorr 2012-03-14 01:16:12
我想通過將Order對象中的所有自定義對象更改爲僅包含所引用對象的ID的int值來解決此問題。然後在OrderViewModel中填充OrderController中由ID引用的實際對象。 – azorr 2012-03-14 14:12:16