Question

当我在以下视图上单击Create按钮时：

@model IEnumerable<BasicApplication.Address>

@{
    ViewBag.Title = "Index";
    Person client = ViewBag.client;
}

<h2>Index</h2>

<div>
    <h4>Person</h4>
    <hr />
    <dl class="dl-horizontal">
        <dt>
            @Html.DisplayNameFor(model => model.Person.first_name)
        </dt>

        <dd>
            @Html.Raw(client.first_name)
        </dd>

        <dt>
            @Html.DisplayNameFor(model => model.Person.last_name)
        </dt>

        <dd>
            @Html.Raw(client.last_name)
        </dd>

    </dl>
</div>

<p>
    @Html.ActionLink("Create New", "Create")
</p>

我遇到以下错误：

参数字典在'BasicApplication.Controllers.AddressController'中的方法'System.Web.Mvc.ActionResult Create（Int32）'中包含非空类型'System.Int32'的参数'id'的空条目

我的控制器：

public class AddressController : Controller
{
    ClientsDataContext cdc = new ClientsDataContext();


    // GET: Address/Create
    public ActionResult Create(int id) // person id
    {
        Person client = cdc.getPerson(id);
        ViewBag.client = client;
        return View();
    }

    // POST: Address/Create
    [HttpPost]
    public ActionResult Create(int id, FormCollection collection)
    {
        try
        {
            // TODO: Add insert logic here
            Address newAdress = new Address()
            {
                description = collection["description"],
                street_address = collection["street_address"],
                city = collection["city"],
                province = collection["province"],
                postal_code = collection["postal_code"],
                country = collection["country"],
                person_id = id,
            };

            cdc.Addresses.InsertOnSubmit(newAdress);
            cdc.SubmitChanges();

            return RedirectToAction("Index", new { id = id });
        }
        catch
        {
            Person client = cdc.getPerson(id);
            ViewBag.client = client;
            return View();
        }
    }
}

我在create方法中提供了一个ID，不确定为什么会这样。我几天前才刚开始使用MVC，所以我很新。

Answer 1

问题是您的Create操作链接缺少id参数值。因此，您的Create ActionLink应该如下：

@Html.ActionLink("Create New", "Create", new {id = client.person_id })

Create（Int32）参数字典包含非空类型为'System.Int32'

1 个答案: