配置WCF数据协定以获得正确的JSON响应 [英] Configuring WCF data contract for proper JSON response

问题描述

我管理许多床位和床位早餐网站并运行一种预订引擎，以帮助客户直接在其网站上进行预订(而不是去另一个网站完成交易).

I manage a number of Bed & Breakfast websites and run a kind of booking engine to help the client do bookings directly on their website (as opposed to going to another site to close the deal).

我正在使用ASP.NET WCF创建一个Web服务，以创建一个关于我所管理酒店的客房可用性的JSON响应.我已经配置了Web服务以序列化JSON中的响应.一切工作都很好，除了我无法完全构造合适的对象来获取所需的JSON响应.

I am working on creating a web service using ASP.NET WCF to create a JSON response about room availability of the hotels I manage. I have configured the web service to serialize the response in JSON. Everything works reasonable well EXCEPT I cannot quite construct the proper objects to get the JSON response I want.

为了正确进行切换，我需要返回以以下方式构造的JSON响应:

In order do the handoff properly, I am required to return a JSON response structured in the following way:

{
"api_version" : 10 ,
"lang" : "en_US",
"hotels" :
    [
        {
            "name" : "Example Hotel",
            "email" : "[e-mail]",
            "phone" : "555-555-5555",
            "fax" : "555-555-5555",
            "room_types"  :
                {
                    "Orchid Room" :
                        {
                            "url" : "http://hotel.com/orchid",
                            "desc" : "One queen bed etc."
                        },
                    "Presidential Suite" :
                        {
                            "url" : "http://hotel.com/predidential",
                            "desc" : "One king bed etc."
                        }
                }
        }
    ]
}

我将我的WCF服务配置为以JSON序列化返回对象没有问题.但是，令我感到困惑的是如何构造对象的"room_types"部分.现在的问题是，对于我系统中的每个酒店，我将拥有不同的房间类型，因此我需要以某种方式动态生成room_types对象.但是我不知道如何正确地构造对象.

I have no problem configuring my WCF service to return objects in JSON serialization. However, where I am confused is how to construct the "room_types" part of the object. Now, the issue is that for each hotel in my system I will have DIFFERENT room types, so I need to somehow dynamically generate the room_types object. But I don't know to structure the objects properly.

以下是我到目前为止设置的数据合约，这些合约没有正确序列化为JSON:

Here are the data contracts I have set up so far which do not serialize into JSON properly:

<DataContract()>
Public Class InventoryResponseObject
        <DataMember(order:=0)> Public Property api_version As Integer
        <DataMember(order:=1)> Public Property lang As String
        <DataMember(order:=2)> Public Property hotels As hotelsObject
        <DataMember(order:=3)> Public Property errors As List(Of String)

End Class

<CollectionDataContract()>
Public Class hotelsObject
        Inherits List(Of HotelObject)
        Public Sub New()
        End Sub

End Class

<DataContract()>
Public Class HotelObject
        <DataMember(order:=0)> Public Property name As String
        <DataMember(order:=1)> Public Property email As String
        <DataMember(order:=2)> Public Property phone As String
        <DataMember(order:=3)> Public Property fax As String
        <DataMember(order:=4)> Public Property room_types As RoomTypeCollectionObject

End Class

<DataContract()>
Public Class RoomTypeInfoObject
        <DataMember(order:=0)> Public Property url As String
        <DataMember(order:=1)> Public Property desc As String

End Class

<CollectionDataContract()>
Public Class RoomTypeCollectionObject
        Inherits List(Of RoomTypeInfoObject)
        Public Sub New()
        End Sub

End Class

这将产生以下不正确的JSON重新操作:

This will produce the following incorrect JSON resopnse:

{
"api_version" : 10 ,
"lang" : "en_US",
"hotels" :
    [
        {
            "name" : "Example Hotel",
            "email" : "[e-mail]",
            "phone" : "555-555-5555",
            "fax" : "555-555-5555",
            "room_types"  :[
                        {
                            "url" : "http://hotel.com/orchid",
                            "desc" : "One queen bed etc."
                        },
                        {
                            "url" : "http://hotel.com/predidential",
                            "desc" : "One king bed etc."
                        }
                ]
        }
    ]
}

我很困惑.任何帮助将不胜感激.

I am stumped. Any assistance would be hugely appreciated.

推荐答案

好，我找到了解决方案.它需要两个步骤:

Ok I found a solution. It required two steps:

1. 使用ExpandoObject将属性动态添加到room_types对象
2. 使用Newtonsoft.Json序列化返回对象，并强制服务返回纯文本

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