Question

您好我正在MVC 3申请中工作。我有一个包含以下代码的创建表单。

@model Xrm.Student
@{
ViewBag.Title = "Create Student Record";
 }
@using (Html.BeginForm("Create", "Student", FormMethod.Post))
{
    <div class="editor-label">
         @Html.LabelFor(model => @Model.FirstName)
    </div>
    <div class="editor-field">                                      
         @Html.EditorFor(model => @Model.FirstName)
         @Html.ValidationMessageFor(model => @Model.FirstName)
    </div>
<div>
    <input id="Submit1" type="submit" value="Submit" />
</div>
}

我想在Firsname字段下添加一个新的下拉列表，该字段应填充pubjects。主题是不同的实体。我可以很容易，但我是MVC的新手，所以我只是坚持到这里。任何人都可以建议我实现它的方法。

谢谢和问候

Answer 1

我会定义一个视图模型：

public class MyViewModel
{
    public Student Student { get; set; }

    [DisplayName("Subject")]
    [Required]
    public string SubjectId { get; set; }

    public IEnumerable<Subject> Subjects { get; set; }
}

然后让控制器填充并将此视图模型传递给视图：

public ActionResult Create()
{
    var model = new MyViewModel();
    model.Student = new Student();
    model.Subjects = db.Subjects;
    return View(model);
}

最后将您的视图强烈输入到视图模型中：

@model MyViewModel
@{
    ViewBag.Title = "Create Student Record";
}
@using (Html.BeginForm())
{
    <div class="editor-label">
         @Html.LabelFor(x => x.Student.FirstName)
    </div>
    <div class="editor-field">                                      
         @Html.EditorFor(x => x.Student.FirstName)
         @Html.ValidationMessageFor(x => x.Student.FirstName)
    </div>

    <div class="editor-label">
         @Html.LabelFor(x => x.SubjectId)
    </div>
    <div class="editor-field">                                      
         @Html.DropDownListFor(
             x => x.SubjectId, 
             new SelectList(Model.Subjects, "Id", "Name"),
             "-- Subject --"
         )
         @Html.ValidationMessageFor(x => x.SubjectId)
    </div>

    <div>
        <input type="submit" value="Submit" />
    </div>
}

我用于SelectList的"Id"和"Name"值显然必须是Subject类上的现有属性，您希望将它们用作分别绑定每个的id和文本下拉选项。

MVC3 - 如何向使用不同实体填充的表单（Post）添加下拉列表

1 个答案: