【发布时间】：2014-03-07 02:10:30
【问题描述】：
好吧，这让我发疯了。有时我发现使用 MVC 我有点迷失在树林里，开始寻找错误的道路，一切都下地狱了。所以我伸出手来看看是否有一双新的眼睛会指引我正确的方向。
基本上，该结构允许管理员创建自己的问题，这本身非常简单，但在这种情况下，它不仅仅是一个“单一”的答案框。示例：
您的营业地点的名称和地址是什么？
姓名：_______ 地址：____ 城市：___ 州：__ 邮编：_强>
因此，如果客户只有一个位置，则答案将包含 5 个文本框（姓名、地址、城市、州、邮编）...但由于问题是动态创建的，它可能是 3 个文本框，1， 2等
所以我遇到的问题是当模型被发布回控制器时，视图模型的问题部分很好，但它的答案/选择部分总是返回 null。请看一下是否有我明显忽略的巨大开关。
这是模型和视图模型：
public class Questions
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int ID { get; set; }
public int FormID { get; set; }
[Display(Name = "Question Order")]
[Range(0, Int32.MaxValue, ErrorMessage = "Must Use an Integer")]
public int QuestionOrder { get; set; }
[Required]
[DataType(DataType.MultilineText)]
public string Question { get; set; }
[Display(Name = "Help Text")]
public string HelpText { get; set; }
public bool IsActive { get; set; }
[Display(Name = "Question May Have More Than One Entry")]
public bool CanHaveMoreThanOne { get; set; }
public int QuestionTypeID { get; set; }
}
public class Choices
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int ID { get; set; }
public int QuestionID { get; set; }
public string FieldName { get; set; }
public string QuestionLabel { get; set; }
public bool IsRequired { get; set; }
public string RegEx { get; set; }
public string TextIfSelected { get; set; }
public string QuestionToSkipToIfSelected { get; set; }
public bool IsActive { get; set; }
[NotMapped]
public string AnswerText { get; set; }
[NotMapped]
public bool AnswerBool { get; set; }
[NotMapped]
public int AnswerNumeric { get; set; }
[NotMapped]
public DateTime AnswerDate { get; set; }
}
public class ViewQuestion
{
public Questions Question { get; set; }
public IEnumerable<Choices> Answers { get; set; }
}
这是视图：
@using InterviewMaster.Models
@model ViewQuestion
@using (Html.BeginForm("AnswerQuestion","Interview", FormMethod.Post))
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
@Html.HiddenFor(m => m.Question.CanHaveMoreThanOne)
@Html.HiddenFor(m => m.Question.FormID)
@Html.HiddenFor(m => m.Question.HelpText)
@Html.HiddenFor(m => m.Question.ID)
@Html.HiddenFor(m => m.Question.Question)
@Html.HiddenFor(m => m.Question.QuestionOrder)
@Html.HiddenFor(m => m.Question.QuestionTypeID)
<h3>@Model.Question.Question</h3>
<hr />
@if (Model.Question.QuestionTypeID == 1)
{
foreach(var o in Model.Answers)
{
Html.RenderPartial("Partial1", o);
}
}
else if (Model.Question.QuestionTypeID == 2)
{
//TO-DO: Make other types of answers such as radio buttons, checkboxes, etc.
}
<input type="submit" value="Create" class="btn btn-default" />
</div>
}
这是我正在使用的部分
@model InterviewMaster.Models.Choices
@using(Html.BeginCollectionItem("Choices"))
{
@Html.HiddenFor(model => model.ID)
@Html.HiddenFor(model => model.QuestionID)
@Html.HiddenFor(model => model.FieldName)
@Html.HiddenFor(model => model.QuestionLabel)
@Html.HiddenFor(model => model.IsRequired)
@Html.HiddenFor(model => model.RegEx)
@Html.HiddenFor(model => model.TextIfSelected)
@Html.HiddenFor(model => model.QuestionToSkipToIfSelected)
@Html.HiddenFor(model => model.IsActive)
@Html.HiddenFor(model => model.AnswerBool)
@Html.HiddenFor(model => model.AnswerDate)
@Html.HiddenFor(model => model.AnswerNumeric)
<div class="form-group">
<label>@Html.ValueFor(model => model.QuestionLabel)</label>
@Html.TextBoxFor(model => model.AnswerText)
</div>
}
最后但并非最不重要的是，收到此帖子的控制器：
// POST: /Interview/AnswerQuestion
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult AnswerQuestion(ViewQuestion dto)
{
foreach(var answer in dto.Answers)
{
Console.Write("Answer:" + answer.AnswerText);
}
return RedirectToAction("ContinueInterview", new { OrderID = 1, OrderDetailID = 1, FormID = 1, QuestionID = 1 });
}
【问题讨论】：