CheckBox在ASP.NET MVC中列出并将其绑定回控制器

Question

 Html.CheckBox("SelectedStudents", false, new { @class = "check-item", id = x.Id, value = x.Id })

哪个产生

<input checked="checked" class="check-item" id="4507" name="SelectedStudents" value="4507" type="checkbox">

<input checked="checked" class="check-item" id="4507" name="SelectedStudents" value="4508" type="checkbox">

<input checked="checked" class="check-item" id="4507" name="SelectedStudents" value="4509" type="checkbox">

在mvc模型中,我有

public IEnumerable<string> SelectedStudents { get; set; }

但是当我回帖时,SelectedStudents总是为空.为什么？在这个方法http://benfoster.io/blog/checkbox-lists-in-aspnet-mvc 写的:

ASP.NET MVC模型绑定器非常智能,可以将所选项映射到此属性.

但在我的例子中总是为空.为什么？如何编写更多复选框并将其绑定回来

Answer 1

您应该使用强类型编辑器将结果传递给控制器​​(模型绑定器).

我更喜欢这样做.

模型

public class YourViewModel
{
     public List<SelectListItem> Students
        {
            get;
            set;
        }
}

控制器获取

Students= service.GetStudents(); //Fill the list

视图

  @for (var i = 0; i < Model.Students.Count; i++)
                {

                    @Html.CheckBoxFor(m => m.Students[i].Selected)
                    @Html.HiddenFor(m => m.Students[i].Text)
                    @Html.HiddenFor(m => m.Students[i].Value)
                    <span>@Model.Students[i].Text</span>
                }

控制器帖子

[HttpPost]
        public ActionResult Create(YourViewModel model)
        {
          foreach(var student in model.Students)
          {
            if(student.Selected) { // Do your logic}
          }
        }

或者, 您可以使用数组或字符串列表.在此示例中使用ListBox.

public string[] SelectedStudents{ get; set; }

@Html.ListBoxFor(s => s.SelectedStudents, new MultiSelectList(Model.Students, "Value", "Text", Model.SelectedStudents), new { @class = "form-control", style = "height:250px; width:100%" })