c# - 如何在 ASP.net MVC 5 中使用 @Html.EditorFor 自动填充表单中的字段？

Question

我正在使用 visual studio for asp.net mvc 5 自动生成的表单，将信息保存到数据库中。它是使用带有 Entity Framework 的 asp.net 中的标准脚手架等创建 View 。

我喜欢表单的外观，但我需要一个字段 (datecreated) 至少可以自动填充(但最好是自动填充和隐藏)。问题是我根本不理解自动生成的代码，而且我查找它的努力也没有成功。我也没有努力去理解它。我仍然是 html 助手的初学者，我认为这些是。

这是我正在使用的表单元素。中间的部分是我需要更改为自动填充的部分(创建日期字段)，我认为相关部分是更改 EditorFor。但我不知道:

@using (Html.BeginForm())
{
@Html.AntiForgeryToken()


            <div class="form-horizontal">
                <h4>New Patient:</h4>
                <hr />
                @Html.ValidationSummary(true, "", new { @class = "text-danger" })

...//为简单起见删除了其他表单项

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

...//为简单起见省略了更多项目

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

这部分自动生成的 Controller 如下所示:

// GET: Subjects/Create
    public ActionResult Create()
    {
        return View();
    }

    // POST: Subjects/Create
    // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "ID,Name,DOB,Male,Female,Address,City,ZIP,PhoneHome,PhoneCell,Email,EmergencyContact,EmergencyContactPhone,EmergencyContactRelationship,ReferredBy,DateCreated,Allergy,AllergyDescription,HighBloodPressure,LowBloodPressure,HeartCondition,Diabetes,Anemia,HighCholesterol,Pacemaker,Epilepsy,Pregnant,Cancer,STD,Pain,PainDescription,Headache,HeadacheDescription,CommonCold,HighBloodPressureConcern,Stress,Depression,Sleep,Menstruation,Fertility,WeightControl,Other")] Subject subject)
    {
        if (ModelState.IsValid)
        {
            db.SubjectDatabase.Add(subject);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return View(subject);
    }

如果您不知道我如何自动填充和/或隐藏表单元素创建日期，能否请您指出我可以从哪里学会自己解决这个问题。我认为我在编程方面是合理的，我只是不太了解 html 助手，或者 Controller 中的绑定(bind)函数。

Answer 1

从你的 View 中删除这部分

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

然后，在您的 Controller 中从 Bind 属性中删除 DateCreated 并分配 DateCreated 属性:

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "ID,Name,DOB,Male,Female,Address,City,ZIP,PhoneHome,PhoneCell,Email,EmergencyContact,EmergencyContactPhone,EmergencyContactRelationship,ReferredBy,Allergy,AllergyDescription,HighBloodPressure,LowBloodPressure,HeartCondition,Diabetes,Anemia,HighCholesterol,Pacemaker,Epilepsy,Pregnant,Cancer,STD,Pain,PainDescription,Headache,HeadacheDescription,CommonCold,HighBloodPressureConcern,Stress,Depression,Sleep,Menstruation,Fertility,WeightControl,Other")] Subject subject)
    {
        if (ModelState.IsValid)
        {
            subject.DateCreated = DateTime.Now; //if you want UTC time, use DateTime.UtcNow
            db.SubjectDatabase.Add(subject);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return View(subject);
    }