如何在MVC中发布项目列表

Question

如何在MVC中发布项目列表

我有一个简单的表单,其中包含一个项目列表,我想将它们发布到控制器,但有趣的是我不能.除了列表之外,其他所有内容都会正常运行.我在firebug中检查了ajax调用,并且post值是这样的:

Answers[0].IsMissing    False
Answers[0].Text Ja
Answers[0].Value    0
Answers[1].IsMissing    False
Answers[1].Text Nein
Answers[1].Value    1
Id  1cd14b08-ce3b-4671-8cf8-1bcf69f12b2d
Name    Ja/Nein

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我有一个具有以下属性的AnwserScheme类:

public string Name { get; set; }
public bool IsMissing { get; set; }
public List<AnswerDisplayItem> Answers { get; set; }

public AnswerScheme()
{
    Answers = new List<AnswerDisplayItem>();
}

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我有这个视图代码:

@for (int i = 0; i < Model.Answers.Count; i++) {
    <tr>
        <td>
            @Html.HiddenFor(model => Model.Answers[i].IsMissing)
            @Html.TextBoxFor(model => Model.Answers[i].Value, 
                             new { @class = "inputValue" })
        </td>
        <td>
            @Html.TextBoxFor(model => Model.Answers[i].Text, 
                             new { @class = "inputAnswer" })
        </td>
        <td>
            <span class="span-delete" 
                  data-answer-scheme-id="@Model.Id" 
                  data-answer-id="@Model.Answers[i].Id" >x</span>
        </td>
    </tr>
}

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我有这条负责发布的ajax代码:

$.ajax({
    url: "/AnswerScheme/AddAnswer",
    type: "post",
    data: $("#formAnswerScheme").serialize(),
    success: function (data) {
                 console.log(data);
                 $("#divAnswerSchemeContainer").html(data);
             }
});

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我的控制器中有一个添加答案操作:

[HttpPost]
public PartialViewResult AddAnswer(AnswerScheme answerScheme)
{
    ...some logic comes here
}

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所以最后控制器收到模型,但只收到简单的属性,而不是列表.任何帮助将不胜感激!干杯.

Answer 1

The*_*eed 32

我希望我能看到更多你的课程和代码,因为你没有正确的设置.

我从你提供的东西中重新创造了一些东西.我为这个样本创建了一个MVC 3项目.

查看/共享/ _Layout.cshtml

<!DOCTYPE html>
<html>
<head>
    <title>@ViewBag.Title</title>
    <link href="@Url.Content("~/Content/Site.css")" rel="stylesheet" type="text/css" />
    <script src="@Url.Content("~/Scripts/jquery-1.7.1.min.js")" type="text/javascript"></script>
</head>

    <body>
        @RenderBody()
    </body>
</html>

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查看/共享/ _Partial.cshtml

@model RazorListTest.Models.AnswerScheme 

<table>
@for (int i = 0; i < Model.Answers.Count; i++) {
    <tr>
        <td>
            @Html.HiddenFor(model => Model.Answers[i].IsMissing)
            @Html.TextBoxFor(model => Model.Answers[i].Value, new { @class = "inputValue" })
        </td>
        <td>
            @Html.TextBoxFor(model => Model.Answers[i].Text, new { @class = "inputAnswer" })
        </td>
        <td><span class="span-delete" data-answer-scheme-id="@Model.Id" data-answer-id="@Model.Answers[i].Id" >x</span></td>
    </tr>
}
</table>

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型号/ AnswerDisplayItem.cs

using System.Collections.Generic;

namespace RazorListTest.Models
{
    public class AnswerDisplayItem
    {
        public bool IsMissing { get; set; }
        public string Text { get; set; }
        public string Value { get; set; }
        public string Id { get; set; }
    }

    public class AnswerScheme
    {
        public List<AnswerDisplayItem> Answers { get; set; }
        public string Id { get; set; }

        public AnswerScheme()
        {
            Answers = new List<AnswerDisplayItem>();
        }
    }
}

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首页/ Index.cshtml

@model RazorListTest.Models.AnswerScheme

    @using (Html.BeginForm(null, null, FormMethod.Get, new { name="formAnswerScheme", id = "formAnswerScheme"}))
    {
        {Html.RenderPartial("_Partial");}

        <div>
            <input type="button" value="Click me" id="btnClick"/>
        </div>

        <div id="divAnswerSchemeContainer">

        </div>
    }

<script type="text/javascript">
    $("#btnClick").click(function () {

        $.ajax({
            url: 'Home/AddAnswer',
            type: 'POST',
            dataType: 'json',
            data: $("#formAnswerScheme").serialize(),
            success: function (data) {
                console.log(data);
                $("#divAnswerSchemeContainer").html(data);
            },
            error: function (xhr, textStatus, exceptionThrown) { alert(JSON.parse(xhr.responseText)); }
        });
    });
</script>

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控制器/ HomeController.cs

using System.Collections.Generic;
using System.Web.Mvc;
using RazorListTest.Models;

namespace RazorListTest.Controllers
{
    public class HomeController : Controller
    {

        public ActionResult Index()
        {
            AnswerScheme a = new AnswerScheme();

            a.Id = "1cd14b08-ce3b-4671-8cf8-1bcf69f12b2d";

            List<AnswerDisplayItem> adi = new List<AnswerDisplayItem>();
            AnswerDisplayItem a1 = new AnswerDisplayItem();
            a1.IsMissing = false;
            a1.Text = "Ja";
            a1.Value = "0";
            a1.Id = "1234";
            AnswerDisplayItem a2 = new AnswerDisplayItem();
            a2.IsMissing = false;
            a2.Text = "Nein";
            a2.Value = "1";
            a2.Id = "5678";
            adi.Add(a1);
            adi.Add(a2);
            a.Answers = adi;
            return View(a);
        }

        [HttpPost]
        public JsonResult AddAnswer(AnswerScheme answerScheme)
        {
            return Json("the list is in the Model.");
        }
    }
}

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