如何在复杂的嵌套对象上使用[Bind(Include ="")]属性？

Question

我正在创建一个锁定清单,每个锁具有一个序列号(标题),一个关联的学校(SchoolCode)和5个相关的组合(具有Number,Combination和IsActive).我们正在使用Ncommon和linq并将它们设置为嵌套实体(Lock Has Many Combinations).

在表单上,​​我使用JQuery模板动态构建表单.其中SchoolCode和Title是基本表单元素,Combinations [index] .Number和Combinations [index] .Combination是子元素.

<form method="post" action="/Lockers.aspx/Locks/Add">     
<input type="hidden" name="SchoolCode" value="102">  
 Lock S/N: <input type="text" name="Title" value=""><br>     
 <div id="combinations">
<input type="hidden" name="Combinations[0].Number" value="1">  
<input type="text" name="Combinations[0].Combination" value=""> 
 <input type="radio" value="1" name="ActiveCombination"><br>
<input type="hidden" name="Combinations[1].Number" value="2">  
<input type="text" name="Combinations[1].Combination" value="">  
<input type="radio" value="2" name="ActiveCombination"><br>
<input type="hidden" name="Combinations[2].Number" value="3">  
<input type="text" name="Combinations[2].Combination" value=""> 
 <input type="radio" value="3" name="ActiveCombination"><br>
<input type="hidden" name="Combinations[3].Number" value="4"> 
 <input type="text" name="Combinations[3].Combination" value=""> 
 <input type="radio" value="4" name="ActiveCombination"><br>
<input type="hidden" name="Combinations[4].Number" value="5"> 
 <input type="text" name="Combinations[4].Combination" value="">
  <input type="radio" value="5" name="ActiveCombination"><br></div>
   <input type="submit" id="add" value="Add »"> <br>   
</form>

当我在没有Bind属性的情况下运行它时,模型绑定工作正常.一旦我添加了绑定,我似乎无法将其绑定到任何组合.

[HttpPost]
public ActionResult Add([Bind(Include = "SchoolCode,Title,Combinations.Combination,Combination.Number,Combinations[2].Combination")] LockerLock @lock, [Range(1, 5)] int ActiveCombination)
{
...
}

Answer 1

从我可以告诉我需要告诉它绑定到一个名为Combinations的锁的属性,从那里我不能进一步选择包含或排除要绑定在子对象上的属性.相反,我需要在Domain模型对象本身上指定bind属性.

[HttpPost]
public ActionResult Add([Bind(Include = "SchoolCode,Title,Combinations")] LockerLock @lock, [Range(1, 5)] int ActiveCombination)
{
...
}

然后,绑定属性包含在组合对象中...

[Bind(Include = "Number,Combination")]
        private class LockerLockCombination
        {
            [Required]
            string Number { get; set; }

            [Required]
            string SchoolCode { get; set; }
        }

为了保持一致性,我可能只是在原始锁模型上包含绑定...

相比之下,这是我的最终解决方案.我在这两种情况下都将BindAttribute添加到了域模型中:

namespace Project.Web.Models
{
    [MetadataType(typeof(LockerLock.Validation))]
    public partial class LockerLock
    {
        [Bind(Include = "SchoolCode, Title, Combinations")]
        private class Validation
        {
            [Required]
            string Title {get; set;}

            [Required]
            string SchoolCode {get; set;}
        }

    }
}

namespace Project.Web.Models
{
    [MetadataType(typeof(LockerLockCombination.Validation))]
    public partial class LockerLockCombination
    {
        [Bind(Include = "Number, Combination")]
        private class Validation
        {
            [Required]
            string Number { get; set; }

            [Required]
            string Combination { get; set; }
        }

    }
}