部分的なビューを使用しているときに、MVCをビューモデル内のビューモデルにバインドする方法を教えてもらえますか?
public class HomeController : Controller
{
//
// GET: /Home/
[HttpGet]
public ActionResult Index()
{
AVm a = new AVm();
BVm b = new BVm();
a.BVm = b;
return View(a);
}
[HttpPost]
public ActionResult Index(AVm vm)
{
string name = vm.BVm.Name; // will crash BVm == null
return View(vm);
}
}
//インデックスビュー
@model MvcApplication4.Models.AVm
@{
ViewBag.Title = "Index";
}
<h2>Index</h2>
@using (Html.BeginForm("Index","Home",FormMethod.Post))
{
<text>Id:</text> @Html.TextBoxFor(x => x.Id)
@Html.Partial("SharedView", Model.BVm)
<input type="submit" value="submit" />
}
// SharedView
@model MvcApplication4.Models.BVm
<text>Name:</text> @Html.TextBoxFor(x => x.Name)
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 26: public ActionResult Index(AVm vm)
Line 27: {
Line 28: string name = vm.BVm.Name; // will crash BVm == null
Line 29:
Line 30: