MVC3如何在ViewModel中将多个复选框绑定到1个属性

Question

我需要显示一个复选框列表,可以检查多个复选框.

当用户点击提交时,这些复选框的值需要进入ViewModel中的属性...这是我到目前为止所得到的...

public class RegisterModel
{
    public List<string> Roles { get; set; }
    public List<RoleModel> SelectedRoles { get; set; }    
}
public class RoleModel
{
    public string RoleName { get; set; }
}

在视图中我试图这样做......

@foreach (var role in Model.Roles)
{
    @Html.CheckBoxFor(m => m.SelectedRoles, role.RoleName)@role.RoleName
}

我收到以下错误:

CS0029: Cannot implicitly convert type 'System.Collections.Generic.List<string>' to 'bool'

有人能告诉我我做错了什么吗？

Answer 1

简单:调整视图模型以匹配您的视图要求(显示某些角色的复选框列表),使用编辑器模板并避免在视图中编写循环.

所以:

查看型号:

public class RegisterModel
{
    public List<RoleModel> Roles { get; set; }
}

public class RoleModel
{
    public string RoleName { get; set; }
    public bool Selected { get; set; }
}

控制器:

public class HomeController : Controller
{
    public ActionResult Index()
    {
        var model = new RegisterModel
        {
            Roles = new[]
            {
                new RoleModel { RoleName = "administrator" },
                new RoleModel { RoleName = "developer" },
                new RoleModel { RoleName = "janitor :-)" },
            }.ToList()
        };
        return View(model);
    }

    [HttpPost]
    public ActionResult Index(RegisterModel model)
    {
        // at this stage the model will contain all the 
        // information you need
        return View(model);
    }
}

查看(~/Views/Home/Index.cshtml):

@model RegisterModel

@using (Html.BeginForm())
{
    @Html.EditorFor(x => x.Roles)
    <button type="submit">OK</button>
}

编辑模板(~/Views/Home/EditorTemplates/RoleModel.cshtml):

@model RoleModel

<div>
    @Html.HiddenFor(x => x.RoleName)
    @Html.CheckBoxFor(x => x.Selected)
    @Html.LabelFor(x => x.Selected, Model.RoleName)
</div>