我试图用一个View来做这个,也许这不是最好的方法?
我有一个数据驱动的表单;这些问题都来自问题表,但答案填充了一个Response表。这是视图;
@using Microsoft.AspNet.Identity
@model Template.Models.Question
@{
ViewBag.Title = "View question";
var qtype = Model.QuestionTypeId;
ViewBag.Number = Model.Id - 7;
Html.BeginForm("ViewQuestion", "Question", FormMethod.Post, new { @class = "form-horizontal", role = "form" });
}
<h4>Question #@ViewBag.Number</h4>
<hr />
<h1> @Model.Question1</h1>
@Html.AntiForgeryToken()
<div>
@switch (qtype)
{
case 1:
// Textbox
@Html.TextArea("Answer", new { @class = "form-control", rows = "4", col = "5" });<br /><br />
break;
case 2:
// Dropdown
<select class="form-control" id="Answer">
@foreach (var item in Model.QuestionOptions.OrderBy(o => o.QuestionOptionRanking))
{
<option value="@item.QuestionOption1">@item.QuestionOption1</option>
}
</select><br /><br />
break;
case 3:
// Checkbox
<div class="checkbox">
@foreach (var item in Model.QuestionOptions.OrderBy(o => o.QuestionOptionRanking))
{
<input type="checkbox" name="Answer" value="@item.QuestionOption1" /> @item.QuestionOption1 <br />
}
</div><br /><br />
break;
case 4:
// Radio buttons
foreach (var item in Model.QuestionOptions.OrderBy(o => o.QuestionOptionRanking))
{
<div class="radio">
<label>
<input type="radio" name="Answer" value="@item.QuestionOption1" />
@item.QuestionOption1
</label>
</div>
}<br /><br />
break;
}
</div>
<input type="hidden" name="QuestionId" value="@Model.Id" />
<input type="hidden" name="UserId" value="@User.Identity.GetUserId()" />
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" class="btn btn-default" value="Answer" />
</div>
</div>
这是我的ViewModel;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
namespace Template.Models
{
public class GetQuestionViewModel
{
public int Id { get; set; }
public int PageNumber { get; set; }
public string Question1 { get; set; }
public int QuestionTypeId { get; set; }
public Nullable<int> LinkedTo { get; set; }
public Nullable<int> Options { get; set; }
public Nullable<int> QuestionRanking { get; set; }
public virtual ICollection<QuestionOption> QuestionOptions { get; set; }
public virtual QuestionType QuestionType { get; set; }
public virtual ICollection<Response> Responses { get; set; }
public virtual ICollection<AspNetUser> AspNetUsers { get; set; }
}
public class ResponseViewModel
{
[Required]
public string UserId { get; set; }
[Required]
public int QuestionId { get; set; }
[Required(ErrorMessage = "Please answer the question before submitting")]
public string Answer { get; set; }
[Required]
public string Source { get; set; }
[Required]
public string Status { get; set; }
[Required]
public System.DateTime DateStamp { get; set; }
public Nullable<int> Duplicate { get; set; }
public virtual Question Questions { get; set; }
public object SelectedValue { get; set; }
public virtual ICollection<QuestionOption> QuestionOptions { get; set; }
}
}
我无法让GetQuestionViewModel工作,并且已经使用问题模型的.emdx版本来填充页面,但我的任务是a)在页面上显示每个用户的答案,以及b)显示问题PageNumber字段可以在一个屏幕上显示任意数量的问题。
这是我的控制器,但你可以看到更多被评论出来而不是工作!
using System.Web.Mvc;
using Template.Models;
namespace Template.Controllers
{
public class QuestionController : Controller
{
private WebTemplateEntities db = new WebTemplateEntities();
// GET: /Questions/ViewQuestion/5
public ActionResult ViewQuestion(int? id)
{
if (id == null || id == 0 || id > 12)
{
id = 8;
}
var question = db.Questions.Find(id);
if (question == null)
{
return HttpNotFound();
}
return View(question);
}
// [Route("Questions/{page?}")]
//public ActionResult ViewQuestion(GetQuestionViewModel model, int? id)
//{
// if (id == null || id == 0 || id > 12)
// {
// //return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
// id = 8;
// //return RedirectToAction("/ViewQuestion/" + id);
// }
// var q = db.Questions.Find(id);
// var pageId = q.PageNumber;
// var questions = from q in db.Questions
// where q.PageNumber == pageId
// orderby q.QuestionRanking
// select q;
// return View(questions);
// }
// POST: /Questions/ViewQuestion/5
[HttpPost]
public ActionResult ViewQuestion([Bind(Include = "QuestionId, Answer, UserId")] ResponseViewModel responseViewModel)
{
Response re = new Models.Response();
re.Answer = responseViewModel.Answer;
if (re.Answer == null)
{
re.Answer = "Work in progress!";
// re.Answer = responseViewModel.SelectedValue();
// re.Answer = int.Parse(SelectList["Question.QuestionOption1"]);
}
re.UserId = responseViewModel.UserId;
re.QuestionId = responseViewModel.QuestionId;
var id = responseViewModel.QuestionId;
re.Source = "Web";
re.Status = "New";
re.DateStamp = System.DateTime.Now;
db.Responses.Add(re);
db.SaveChanges();
return RedirectToAction("ViewQuestion/" + (id + 1));
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
db.Dispose();
}
base.Dispose(disposing);
}
}
}
我一直在研究这个问题几天,现在我只是绕圈子。任何帮助或建议都非常感谢。
答案 0 :(得分:0)
看起来你混淆了实体模型和ViewModel。在您的视图中,您引用了Template.Models.Question
,它似乎是一个实体而不是一个ViewModel。
视图应仅引用您的ViewModel,而不是您的实体。并且应该在您的实体和ViewModel之间建立一些映射机制。我注意到的另一件事是您的Entity和ViewModel似乎位于应用程序的同一名称空间中。这不一定是个问题,但可能会让人感到困惑,因为ViewModel仅适用于您的视图,而实体属于您的持久层。
目前,您的代码正在通过此代码获取问题对象:from q in db.Questions
然后您将其传递给View(问题)。因此,您实际上不会在视图中使用ViewModel,它将是您的实体模型。
将您的观点更改为:
@model Template.Models.GetQuestionViewModel
将控制器更改为:
var questions = (from q in db.Questions
where q.PageNumber == pageId
orderby q.QuestionRanking
select q.ToViewModelExtensionMethod()).ToList();
return View(questions);
您必须编写该扩展方法来执行从Template.Model.Question到Template.Model.GetQuestionViewModel的映射。
希望这有帮助。
<强>更新强>
有关扩展方法的信息,请参阅MSDN article。
我只是使用扩展方法,因为我喜欢语法流的方式。这是一个简单的例子:
namespace Template.Models.Extensions
{
public static class QuestionExtensions
{
public static GetQuestionViewModel ToViewModelExtensionMethod(this Question question)
{
var result = new GetQuestionViewModel();
result.field1 = question.field1;
// ... etc
return result;
}
}
}
另外,请注意上面的更改,我现在在查询项目时对其进行映射。