我正在尝试使用强类型视图来实现我的编辑操作方法,该视图接收自定义形状的 ViewModel 类。换句话说,我想要一个强类型的 ViewModel,其中包含应编辑的 Linq 实体以及应在视图中显示的一些其他对象。
我可以在调用 GET Edit 操作方法时看到视图,但强类型 POST 操作方法仅接收带有 null 参数的 ViewModel 类,并且我不知道如何检索 POST 参数。
视图模型如下所示:
//my custom-shaped ViewModel
public class CustomersFormViewModel
{
public SelectList AccountTypesDropDownBox;
public SelectList CountriesDropDownBox;
public Customer Customer;
}
操作方法如下所示:
//
// GET: /CustomersController/Edit
public ActionResult Edit(int ID)
{
var model = new CustomersFormViewModel
{
Customer = repository.Load(ID.Value),
CountriesDropDownBox = GetCountries(),
AccountTypesDropDownBox = GetAccountTypes()
};
return View(model);
}
//
// POST: /CustomersController/Edit
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Edit(CustomersFormViewModel model)
{
//THE NEXT LINE THROWS!!!
Debug.Assert(Model.Customer!=null);
return View(model);
}
这是我的编辑视图:
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/CustAdminMaster.master"
Inherits="System.Web.Mvc.ViewPage<Zeiterfassung.Controllers.CustomersController+CustomersFormViewModel>" %>
<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
NewEdit
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<h2>
NewEdit</h2>
<%= Html.ValidationSummary("Edit was unsuccessful. Please correct the errors and try again.") %>
<% using (Html.BeginForm())
{%>
<fieldset>
<legend>Fields</legend>
<p>
<label for="FirstName">FirstName:</label>
<%= Html.TextBox("FirstName",Model.Customer.FirstName) %>
<%= Html.ValidationMessage("FirstName", "*") %>
</p>
<p>
<input type="submit" value="Save" />
</p>
</fieldset>
<% } %>
<div>
<%=Html.ActionLink("Back to List", "Index") %>
</div>
</asp:Content>
我还尝试了带有 formValues 参数的 POST 操作方法,但视图模型仍然不包含发布的参数:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Edit(int ID, FormCollection formValues)
{
CustomersFormViewModel model = new CustomersFormViewModel();
UpdateModel(model);
//THE NEXT LINE STILL THROWS
Debug.Assert(model.Customer!=null);
return View("NewEdit",model);
}
到目前为止,我发现的唯一方法是编写自己的代码,从 FormCollection 中获取发布的参数并相应地更新我的自定义 ViewModel。但这种方法似乎有点原始。难道真的没有更好的办法吗?
EDIT:我刚刚在视图中尝试了 tvanfosson 建议的不同语法,但问题仍然没有改变:
<label for="Customer.FirstName">FirstName:</label>
<%= Html.TextBox("Customer.FirstName") %>
<%= Html.ValidationMessage("Customer.FirstName", "*") %>