Question

我正在努力将ans绑定到单选按钮我正在做一个小项目。我有两个模型问答。我想要获得一个问题列表并基于设置用户将有多个选择或在文本框中键入答案。使用单选按钮我似乎无法绑定它，它可以指向一个空对象，有人可以指出我正确的方向。

@model List<Question.Models.Questionnaire>


@{
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Question List</h2>

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


for(int i = 0;i < Model.Count;i++) {

    <text>@Model[i].Questions</text> <br />

    @Html.HiddenFor(M => M[i].QuestionID)

    if (@Model[i].MultipleChoice == false){

        @Html.TextBoxFor(M => M[i].Response) <br />

    } else {

          for(int j = 0;j < Model[i].GetAns.Count;j++) {
               <div>
              <text>@Model[i].GetAns[j].AnsText</text>
              @Html.RadioButtonFor(M => Model[i].QuestionID, Model[i].GetAns[j].AnswerId) <br />
               </div>
        }

        /*
        foreach(var ansOption in PossibleAns) {
          <div>
           @Html.RadioButtonFor(model => Model[i].QuestionID, ansOption.AnswerId)
           @Html.Label(ansOption.AnsText)
          </div>  
        }
         * */
        <br />
    }
}
<br />

  <input type="submit" name="submit" />

}

public class Questionnaire
{
    public Questionnaire() {
    }

    public int QuestionID  { get; set;}
    public string Title    { get; set;}
    public string Questions{ get; set;}
    public string Response { get; set;}
    public bool MultipleChoice { get; set;}

    public List<Answer> GetAns { set; get;}

}

 public class Answer  
 {
    public int AnswerId { get; set; }
    public string AnsText { get;set;}
    public Questionnaire Ques { get; set;}
 }


public class QuestionRepository
{

    public List<Questionnaire>
         GetQuestionnaire() {
             List<Questionnaire> q = new List<Questionnaire>();
             q.Add(new Questionnaire() {
                 QuestionID = 11, Title = "Geo", Questions = "Capital of England?", GetAns = GetAns(), MultipleChoice = true
             });
             q.Add(new Questionnaire() {
                 QuestionID = 22, Title = "Geo", Questions = "Capital of France", GetAns = GetAns()
             });
             q.Add(new Questionnaire() {
                 QuestionID = 33, Title = "Geo", Questions = "Capital of Cuba", GetAns = GetAns()
             });
             return q;
    }

    public List<Answer> GetAns() {

        List<Answer> ans = new List<Answer>();
        ans.Add(new Answer() {
            AnswerId = 1, AnsText = "london", Ques = new Questionnaire() {
                QuestionID = 11
            }
        });
        ans.Add(new Answer() {
            AnswerId = 2, AnsText = "paris", Ques = new Questionnaire() {
                QuestionID = 22
            }
        });
        ans.Add(new Answer() {
            AnswerId = 3, AnsText = "Havana", Ques = new Questionnaire() {
                QuestionID = 33
            }
        });

        return ans;
    }



}

Answer 1

您的单选按钮绑定到属性QuestionID（并且您使用所选QuestionID覆盖AnswerID的值，因此当您回发时没有任何意义。您的类和属性命名使其难以理解，但如果您想从一组可能的答案中选择一个答案，那么属性GetAns只需要List<string>然后将所选答案绑定到属性{{1}例如，对于第一个问题（“英格兰首都？”），您似乎希望选择“london”，“paris “或”哈瓦那“，那么问题应该有一个属性

Response

并在控制器中

public List<string> PossibleAnswers { get; set; }

并在视图中

model.Questions[0].PossibleAnswers = new List<string>() { "london", "paris", "Havana" }

当您回发时，for(int i = 0; i < Model.Count; i++) { { if (@Model[i].MultipleChoice) { // Radio buttons for multiple choice foreach(string option in Model[i].PossibleAnswers) { <label> @Html.RadioButtonFor(m => m[i].Response, option}) <span>@option</span> </label> } } else { // Textbox for answer @Html.TextBoxFor(m => m[i].Response) } }属性将包含答案的文本，无论是在文本框中输入的内容，还是包含多项选择问题的可能答案之一。

但是，我建议你需要重新考虑你在这里做的大部分事情，特别是如果你想要绑定到多项选择答案的ID属性。

剃刀 - 绑定问题与单选按钮

1 个答案: