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我正在使用 C# 中的 ASP.NET MVC3 工作。

我的数据库中有一个包含问题的表。管理员可以添加新问题、编辑问题等。

我有另一个存储问题和答案的表（所以是响应）。

例子：

问题表：

QuestionId............问题

........1.......你好吗？

.......2............为什么天空是蓝色的？

在我看来，我说“对于每个问题，打印问题并提供一个文本区域来回答问题”

然后我想说“当他们提交时，将每个问答对保存到问答表中”

答案表：

AnswerId............问题............回答

......1............你好吗？......我很好

......2....为什么天空是蓝色的？......因为

问题是存在任意/可变数量的问题，因此存在任意数量的文本区域。如何将该信息传递给 Post 操作？

编辑

这是我在 Xander 推荐后的看法

@using (Html.BeginForm("QuestionsAndAnswers", "Product"))
{
    int i = 0;
    foreach (var m in Model.Questions)
    {
    i++;
    <div>@m.Body</div>
    @Html.TextArea(string.Format("textareas[{0}]", i))
    <br />
    }
    <input type="submit" value="Save"/>
    @Html.ActionLink("Cancel", "Index", "Home");
}
4

4 回答 4

2

用你的观点......

@using (Html.BeginForm("QuestionsAndAnswers", "Product"))
{

    foreach (var m in Model.Questions)
    {
    <div class="formfields">
    <input type="hidden" name="QuestionId" id="QuestionId" value="@m.QuestionId" />
    <div>@m.Body</div>
    <textarea name="Answer" id="Answer"></textarea>
    </div>
    }
    <input type="submit" value="Save"/>
    @Html.ActionLink("Cancel", "Index", "Home");
}

这是Jquery ......

<script type="text/javascript">
    $.fn.serializeObject = function () {
        var o = {};
        var a = this.serializeArray();
        $.each(a, function () {
            if (o[this.name]) {
                if (!o[this.name].push) {
                    o[this.name] = [o[this.name]];
                }
                o[this.name].push(this.value || '');
            } else {
                o[this.name] = this.value || '';
            }
        });
        return o;
    };
    $(document).ready(function () {
        $("#Submit").click(function () {
            var QuestionAnswerArray = [];
            var QuestionAnswerLength = $(".formfield").length;
            $(".formfield").each(function (i) {
                var test = $(this).find("textarea, input").serializeObject()
                QuestionAnswerArray.push(test);
                if ((i + 1) == QuestionAnswerLength) {
                    $.ajax({
                        type: 'POST',
                        url: '/../Product/QuestionsAndAnswers',
                        data: JSON.stringify(QuestionAnswerArray),
                        contentType: 'application/json; charset=utf-8',
                        dataType: 'json',
                        success: function (return_flag) {                            
                            if (return_flag == true) {
                                alert("Question and Answers Saved Succesfully!");                                
                            } else {
                                alert("Error Occured");
                            }
                        }
                    });
                }
            });
        });
    });
</script>

然后你在 Controller 中行动......

[HttpPost]
public ActionResult QuestionsAndAnswers(Answers[] answers)
{
                foreach (var item in answers)
                {
                    // do whatever you want here
                }
                return View();
}
于 2012-04-28T10:10:36.217 回答
1

楷模：

public class Question
{
    public int Id { get; set; }
    public string QuestionText { get; set; }
}

public class Answer
{
    public int Id { get; set; }
    public string QuestionText { get; set; }
    public string AnswerText { get; set; }
}

视图模型：

public class AnswersViewModel
{
    public IList<Answer> Answers { get; set; }
}

控制器：

public class AnswersController : Controller
{
    QuestionRepository _questionRepository = new QuestionRepository();

    public ActionResult Index()
    {
        AnswersViewModel model = new AnswersViewModel();
        model.Answers = new List<Answer>();
        IEnumerable<Question> questions = _questionRepository.GetRandomQuestions();
        foreach (Question question in questions)
        {
            model.Answers.Add(new Answer() { QuestionText = question.QuestionText });
        }
        return View(model);
    }

    [HttpPost]
    public ActionResult Index(AnswersViewModel model)
    {
        //the model will be properly bound here
        return View(model);
    }
}

视图/答案/Index.cshtml

@model MvcApplication1.Models.AnswersViewModel
@{
    ViewBag.Title = "Index";
}
@using (Html.BeginForm("Index", "Answers", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    @Html.EditorFor(x => x.Answers)
    <input name="submit" type="submit" value="Submit" />
}

视图/答案/EditorTemplates/Answer.cshtml

@model MvcApplication1.Models.Answer
@Html.HiddenFor(x => x.Id)
@Html.HiddenFor(x => x.QuestionText)
@Html.DisplayFor(x => x.QuestionText)
<br />
@Html.TextAreaFor(x => x.AnswerText)
<br />

编辑：

我更新了答案以使其更清楚。

于 2012-04-27T23:28:40.090 回答
1

我们可以编写控制器来接收来自模型或视图模型的数组，但数组不是 ORM 友好的（如果您打算直接使用域模型来查看视图）。考虑到这一点，我们的 Controller 的 View 将在IList; IList是灵活的，它不受元素数量的限制，不像数组；与数组相比，IList 是 ORM 就绪的。

我们应该做的唯一调整是在视野中；HTML或者更确切地说是javascript，没有列表的概念，它只能使用数组或关联数组。承认这一限制，我们会将这些项目从List<ClassType>对 javascript 友好的数组中发出。

最后，当我们提交时，我们友好的社区 ASP.NET MVC 将为我们处理这些事情，即它可以List<ClassType>根据提交的 HTML/javascript 数组自动填充我们的变量，即我们不需要迭代Request.Form,不需要手动填充，我们的代码操作的一切都是以模型/视图模型为中心的，因为它们应该是。ASP.NET MVC 程序员的生活很美好不是吗？;-)

完整代码如下：

模型：

namespace SoQna.Models
{
    public class Question
    {
        public int QuestionId { get; set; }
        public string QuestionText { get; set; }
    }

    public class Answer
    {
        public int AnswerId { get; set; }
        public Question Question { get; set; }
        public string AnswerText { get; set; }
    }
}

视图模型：

using System.Collections.Generic;

namespace SoQna.ViewModels
{
    public class QnaViewModel
    {
        public IList<AnswerToQuestion> Answers { get; set; }
    }

    public class AnswerToQuestion
    {
        public int ToQuestionId { get; set; }
        public string QuestionText { get; set; }
        public string AnswerText { get; set; }
    }
}

控制器：

using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;

namespace SoQna.Controllers
{
  public class HomeController : Controller
  {
    IList<SoQna.Models.Question> _qnaRepo = new List<SoQna.Models.Question>
    {
      new SoQna.Models.Question { QuestionId = 1, 
        QuestionText = 
          "Why is there a proliferation of different kind of ORMs?" 
      },
      new SoQna.Models.Question { 
          QuestionId = 2, QuestionText = "How are you?" 
      },
      new SoQna.Models.Question { 
          QuestionId = 3, QuestionText = "Why the sky is blue?" 
      },          
      new SoQna.Models.Question { 
          QuestionId = 4, QuestionText = "Why is MVC the bees knees?" 
      },          
    };


    public ActionResult Index()
    {
      var qna = new SoQna.ViewModels.QnaViewModel { 
          Answers = new List<SoQna.ViewModels.AnswerToQuestion>() 
      };

      foreach (var question in _qnaRepo)
      {
        if (question.QuestionId == 1) continue; // subjective :-)

        qna.Answers.Add(
          new SoQna.ViewModels.AnswerToQuestion { 
              ToQuestionId = question.QuestionId, 
              QuestionText = question.QuestionText, 
              AnswerText = "Put your answer here" 
          }
        );         
      }

      return View(qna);
    }

    [HttpPost]
    public ViewResult SubmitAnswers(SoQna.ViewModels.QnaViewModel a)
    {
      foreach (var answer in a.Answers)
      {
        answer.QuestionText = _qnaRepo.Single(x => 
           x.QuestionId == answer.ToQuestionId).QuestionText;
      }
      return View(a);
    }

  }//HomeController
}//namespace

查看主页/索引

@model SoQna.ViewModels.QnaViewModel

@{
    ViewBag.Title = "Index";
}

<h2>Hahah</h2>

@using (Html.BeginForm("SubmitAnswers", "Home"))
{


    int i = 0;
    foreach (var answer in Model.Answers)
    {
        @: Question #@(answer.ToQuestionId) <br />

        @Html.Hidden("Answers[" + i + "].ToQuestionId", answer.ToQuestionId)

        @Html.Label("Answers[" + i + "].QuestionText", answer.QuestionText)

        @* 
           to save bandwidth we didn't include QuestionText on submit, 
           this is done by assigning it on Label, and no need to persist 
           QuestionText on Hidden 
        *@

        <br />

        @Html.TextArea("Answers[" + i + "].AnswerText", answer.AnswerText)

        <hr />

        ++i;

    }

    <input type="submit" value="Done" />
}

查看主页/提交答案

@model SoQna.ViewModels.QnaViewModel

@{
    ViewBag.Title = "SubmitAnswers";
}

<h2>SubmitAnswers</h2>


@foreach (var item in Model.Answers)
{
    @: Answer to question: @item.QuestionText
    <br />    
    @item.AnswerText

    <hr />
}
于 2012-04-28T12:10:38.723 回答
0

我建议建立隐藏字段，如下所示：

<input type="hidden" name="questionsAndAnswers" 
value="[{'id':questionId, 'question':questionName, 'answer':answerName}, 
        {'id':questionId, 'question':questionName, 'answer':answerName}...] />

然后你序列化发布的隐藏值

于 2012-04-28T15:05:35.680 回答