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我和这个玩得很开心。我肯定错过了什么。

我通过 Angular/JSON 将复杂模型发布到 .NET 控制器。将其发布回服务器时,DefaultModelBinder 仅部分绑定到模型(简单的值,例如 int (ID) 和 string (title) 都可以)。“ListItems”数据集以及作为 ProjectDetails 模型一部分的“ProductsList”数据表似乎被忽略了。根据我正在阅读的内容,对于复杂对象,DefaultModelBinder 以递归方式对 JSON 进行第二次传递,然后映射它可以找到的对象。我尝试了许多通过搜索 StackOverflow 找到的解决方案,但无济于事。我想我在这一点上刚刚失去了我的观点。这就是我所拥有的。任何帮助将不胜感激。

该模型

    Public Class ProjectDetails

    Private _ListItems As DataSet
    <JsonProperty("ListItems")> _
    Public Property ListItems() As DataSet
        Get
            Return _ListItems
        End Get
        Set(ByVal value As DataSet)
            _ListItems = value
        End Set
    End Property

    Private _ProductsList As DataTable
    Public Property ProductsList As DataTable
        Get
            Return _ProductsList
        End Get
        Set(value As DataTable)
            _ProductsList = value
        End Set
    End Property

    Private _imageID As Int32 = 0
    Public Property imageID() As Int32
        Get
            Return _imageID
        End Get
        Set(ByVal value As Int32)
            _imageID = value
        End Set
    End Property

    Private _Title As String = String.Empty
    Public Property Title() As String
        Get
            Return _Title
        End Get
        Set(ByVal value As String)
            _Title = value
        End Set
    End Property
    End Class

动作控制器

    <Authorize()> _
    <AcceptVerbs(HttpVerbs.Post)> _
    <ValidateInput(False)> _
    Async Function ProjectUpdate(ByVal d As ProjectDetails) As Task(Of JsonResult)
    'send results to database here
    Save(d)
    return json(true)
    End Function

标题

    POST http://localhost:51110/projectUpdate HTTP/1.1
    Host: localhost:51110
    Connection: keep-alive
    Content-Length: 10119
    Accept: application/json, text/plain, */*
    User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36
    Content-Type: application/json;charset=UTF-8
    Accept-Encoding: gzip, deflate
    Accept-Language: en-US,en;q=0.8

发布的 JSON 数据

    {"ListItems":

    {"ProjectStatusCodes":[{"id":1,"ProjectStatusTx":"Stage1 - Under Construction"},{"id":3,"ProjectStatusTx":"Stage3 - Project Released"},{"id":4,"ProjectStatusTx":"Project Closed"}],

    "ProductsList":[
    {"id":2336,"Name":"Product1","Description":"This is a description","$$hashKey":"00K"},
    {"id":2337,"Name":"Product2","Description":"This is a second description","$$hashKey":"00M"}],

    "imageID":345,
    "Title":"books", }
    }

AngularJS 代码

    $scope.update = function (formData) {
    $http({
        method: 'POST',
        url: '/projectbuilder/projectUpdate',
       contentType: 'application/json; charset=utf-8',
        data: JSON.stringify($scope.formData)
    }).success(function (data, status, headers, config) {
        $scope.codeStatus = status;
    }).error(function (data, status, headers, config) {
        $scope.codeStatus = status || "Request failed";

    });

带有表单值的 HTML 模板

    <div ng-repeat="ProductsList in formData.ListItems.ProductsList">
        <div>
          <div>
            <div>
               <input value="{{ProductsList.Title}}" name="ProductsList.Title" ID="ProductsList.Title" ng-model="ProductsList.Title" >
               <br />
               <input value="{{ProductsList.ImageID}}" name="ProductsList.ImageID" ID="ProductsList.ImageID" ng-model="ProductsList.ImageID" >
            </div>
         </div>
    </div>

行为 JSON post 对控制器工作正常,它绑定了 ImageID 和 Title。ListItems 数据集不包含表,并且 ListItems 数据集中的 ProductsList 数据表不存在。

注意:JSON 中的 ProjectStatusCodes 数据不会映射回模型,因为它仅用于在表单上显示。

4

2 回答 2

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如果它试图将 json 中的“ListItems”序列化为列表对象,则可能会导致问题,因为您的 json 中没有括号,即使它只是列表中的一个对象:

  {"ListItems":[ 
         {
             "ProjectStatusCodes":[{"id":1,"ProjectStatusTx":"Stage1 - Under Construction"},{"id":3,"ProjectStatusTx":"Stage3 - Project Released"},{"id":4,"ProjectStatusTx":"Project Closed"}],
             "ProductsList":[{"id":2336,"Name":"Product1","Description":"This is a description","$$hashKey":"00K"},{"id":2337,"Name":"Product2","Description":"This is a second description","$$hashKey":"00M"}],
             "imageID":345,
             "Title":"books"
         } 
  ]}
于 2015-02-24T22:34:06.590 回答
0

好的。我想到了。似乎 JSON.NET 在发送时可以很好地序列化对象,确保它完全符合 JSON 标准。坏消息是,当将数据表发送回 .NET 应用程序时,它删除了大多数使数据表可反序列化的东西。

我最终做的是在回发时捕获 JSON 字符串,并使用您可以在此处找到的 JSON.NET 片段序列化分别访问序列化的数据表数据。http://www.newtonsoft.com/json/help/html/SerializingJSONFragments.htm 我将对象的其余部分“按原样”保留,并从 JSON 字符串中获取数据表,并使用此技术手动进行反序列化。文章中的示例提供了非常丰富的信息。

读取 JSON 字符串的代码

    Dim req As Stream = Request.InputStream
    req.Seek(0, System.IO.SeekOrigin.Begin)
    Dim jsonstring As String = New StreamReader(req).ReadToEnd()

解析和反序列化的代码

    Dim ProductsList As JObject = JObject.Parse(jsonstring)
    Dim results As IList(Of JToken) = ProductsList("ListItems")("ProductsList").Children().ToList()

    Console.Write(results)

不是非常优雅,但它有效。

于 2015-03-01T20:10:59.430 回答