使用复选框以复杂的视图模型MVC3 [英] MVC3 using CheckBox with a complex viewmodel

问题描述

右键家伙。我需要你的大脑，因为我无法找到一个方法来正确地做到这一点。

Right guys. I need your brains as I can't find a way to do this properly.

我有一个视图模型：

public class EditUserViewModel
{
    public User User;
    public IQueryable<ServiceLicense> ServiceLicenses;
}

用户是不重要的，因为我知道如何对付它。

User is unimportant as I know how to deal with it.

ServiceLicenses具有以下实现：

ServiceLicenses has the following implementation:

public class ServiceLicense
{
    public Guid ServiceId { get; set; }
    public string ServiceName { get; set; }
    public bool GotLic { get; set; }
}

获取用户的检查清单是很酷。它的工作原理就像一个魅力。

Getting a checked list of users is cool. It works like a charm.

<fieldset>
    <legend>Licenses</legend>
    @foreach (var service in Model.ServiceLicenses)
    {     
    <p>
        @Html.CheckBoxFor(x => service.GotLic)
        @service.ServiceName
    </p>
    } 
</fieldset>

我有越来越更新ServiceLicenses新签服务对象回到我的控制器中HttpPost问题。为简单起见可以说，它看起来是这样的：

The problem I'm having is getting the updated ServiceLicenses object with new checked services back to the HttpPost in my controller. For simplicity lets say it looks like this:

    [HttpPost]
    public ActionResult EditUser(Guid id, FormCollection collection)
    {

        var userModel = new EditUserViewModel(id);
        if (TryUpdateModel(userModel))
        {
            //This is fine and I know what to do with this
            var editUser = userModel.User;

            //This does not update
            var serviceLicenses = userModel.ServiceLicenses;

            return RedirectToAction("Details", new { id = editUser.ClientId });
        }
        else
        {
            return View(userModel);
        }
    }

我知道我使用复选框以错误的方式。我需要什么改变来获得serviceLicenses与表单检查框更新？

I know I am using CheckBox the wrong way. What do I need to change to get serviceLicenses to update with the boxes checked in the form?

推荐答案

据我所知，ServiceLicenses属性是一个集合，你想MVC粘结剂其绑定到你动作参数属性。对，你应该在你的看法与输入连接索引例如

i understand that ServiceLicenses property is a collection and you want MVC binder to bind it to you action parameters property. for that you should have indices attached with inputs in your view e.g

<input type="checkbox" name = "ServiceLicenses[0].GotLic" value="true"/>
<input type="checkbox" name = "ServiceLicenses[1].GotLic" value="true"/>
<input type="checkbox" name = "ServiceLicenses[2].GotLic" value="true"/>

preFIX可能不是强制性的，但结合的操作方法参数的集合属性时，它是非常方便的。为此，我建议使用循环，而不是的foreach和使用Html.CheckBox帮手，而不是Html.CheckBoxFor

Prefix may not be mandatory but it is very handy when binding collection property of action method parameter. for that purpose i would suggest using for loop instead of foreach and using Html.CheckBox helper instead of Html.CheckBoxFor

<fieldset>
    <legend>Licenses</legend>
    @for (int i=0;i<Model.ServiceLicenses.Count;i++)
    {     
    <p>
        @Html.CheckBox("ServiceLicenses["+i+"].GotLic",ServiceLicenses[i].GotLic)
        @Html.CheckBox("ServiceLicenses["+i+"].ServiceName",ServiceLicenses[i].ServiceName)//you would want to bind name of service in case model is invalid you can pass on same model to view
        @service.ServiceName
    </p>
    } 
</fieldset>

不使用强类型的帮手只是个人的$ P $这里pference。如果你不希望索引你的投入是这样，你也可以看看这个伟大的后通过史蒂夫senderson

Not using strongly typed helper is just a personal preference here. if you do not want to index your inputs like this you can also have a look at this great post by steve senderson

编辑：我的博客有关创建于asp.net MVC3主从形式，它是有关的列表绑定以及情况。

i have blogged about creating master detail form on asp.net mvc3 which is relevant in case of list binding as well.

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