在创建视图中获取空引用

Question

我在 Employee 控制器中创建了一个用于创建新 Employee 的方法：

        [HttpGet]
        [ActionName ("Create")]
        public ActionResult Create()
        {
            return View();
        }

我添加了一个带有员工（强类型）模型的 Create 方法的视图，并使用了 create 模板。 当我运行程序并单击新建时，我在创建视图中收到空引用错误。

@model BuissnessLayer.Employee

@{
    ViewBag.Title = "Create";
}

<h2>Create</h2>


@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()
    
    <div class="form-horizontal">
        <h4>Employee</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.Employee_Id, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Employee_Id, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Employee_Id, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Employee_Name, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Employee_Name, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Employee_Name, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Employee_Age, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Employee_Age, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Employee_Age, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Employee_City, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Employee_City, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Employee_City, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Employee_Salary, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Employee_Salary, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Employee_Salary, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

<script src="~/Scripts/jquery-3.4.1.min.js"></script>
<script src="~/Scripts/jquery.validate.min.js"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>

我在行得到错误

@Html.EditorFor(model => model.Employee_Id, new { htmlAttributes = new { @class = "form-control" } })

我不知道如何解决这个问题，因为代码是自动创建的，我还没有编辑任何东西。

Answer 1

您应该将模型传递给您的视图..

[HttpGet]
[ActionName ("Create")]
public ActionResult Create()
{
    var model = new Employee(){}
    return View(model);
}

@model BuissnessLayer.Employee