将JSON发送到WebMethod时出错

Question

我无法将JSON发送到WebMethod。这是我尝试这样做的方式。如果有更好的方法，请告诉我。我想要做的是将JSON对象保存在数据库中。

的JavaScript

function TEST() {
    var str = '[{
        "Key": 6311,
        "Start": "123 Start",
        "End": "456 End ",
        "Date": "2/2/2012",
        "Order": null,
        "EstMiles": 0,
        "Stops": [
            {"StopAddy": "123 Stop Addy "},
            {"StopAddy": "456 Stop Addy"},
            {"StopAddy": "789 Stop Addy"}
        ]
    }]';    // Whitespace added for clarity

    $.ajax({
        type: "POST",
        url: "WebService1.asmx/Test",
        data: str,
        //contentType: "plain/text",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function(msg) {
            alert(msg.d);
        },
        error: function(e) {
            alert(e.responseText);
        }
    });
} 

VB.NET

Public Function Test(ByVal o As Object()) As String
    'do your processing  
    Return "success"
End Function

Public Class [Stop]
    Public Property StopAddy() As String
        Get
            Return m_StopAddy
        End Get
        Set(ByVal value As String)
            m_StopAddy = value
        End Set
    End Property
    Private m_StopAddy As String
End Class

Public Class RootObject
    Public Property Key() As Integer
        Get
            Return m_Key
        End Get
        Set(ByVal value As Integer)
            m_Key = value
        End Set
    End Property
    Private m_Key As Integer
    Public Property Start() As String
        Get
            Return m_Start
        End Get
        Set(ByVal value As String)
            m_Start = value
        End Set
    End Property
    Private m_Start As String
    Public Property [End]() As String
        Get
            Return m_End
        End Get
        Set(ByVal value As String)
            m_End = value
        End Set
    End Property
    Private m_End As String
    Public Property [Date]() As String
        Get
            Return m_Date
        End Get
        Set(ByVal value As String)
            m_Date = value
        End Set
    End Property
    Private m_Date As String
    Public Property Order() As Object
        Get
            Return m_Order
        End Get
        Set(ByVal value As Object)
            m_Order = value
        End Set
    End Property
    Private m_Order As Object
    Public Property EstMiles() As Integer
        Get
            Return m_EstMiles
        End Get
        Set(ByVal value As Integer)
            m_EstMiles = value
        End Set
    End Property
    Private m_EstMiles As Integer
    Public Property Stops() As List(Of [Stop])
        Get
            Return m_Stops
        End Get
        Set(ByVal value As List(Of [Stop]))
            m_Stops = value
        End Set
    End Property
    Private m_Stops As List(Of [Stop])
End Class

我得到的错误是

  

{“Message”：“Type \ u0027System.Collections.Generic.IDictionary`2 [[System.String，mscorlib，Version = 2.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089]，[System.Object，mscorlib，版本= 2.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089]] \ u0027不支持反序列化数组。“，”StackTrace“：”

  在System.Web.Script.Serialization.ObjectConverter.ConvertListToObject（IList列表，Type类型，JavaScriptSerializer序列化程序，Boolean throwOnError，IList＆amp; convertedList）
  在System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal（Object o，Type type，JavaScriptSerializer serializer，Boolean throwOnError，Object＆amp; convertedObject）\ r \ n

  at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain（Object o，Type type，JavaScriptSerializer serializer，Boolean throwOnError，Object＆amp; convertedObject）\ r \ n

  at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToType（Object o，Type type，JavaScriptSerializer serializer）\ r \ n

  at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize（JavaScriptSerializer serializer，String input，Type type，Int32 depthLimit）\ r \ n

  在System.Web.Script.Serialization.JavaScriptSerializer.Deserialize [T]（字符串输入）\ r \ n

  at System.Web.Script.Services.RestHandler.GetRawParamsFromPostRequest（HttpContext context，JavaScriptSerializer serializer）\ r \ n

  在System.Web.Script.Services.RestHandler.GetRawParams（WebServiceMethodData methodData，HttpContext context）\ r \ n

  在System.Web.Script.Services.RestHandler.ExecuteWebServiceCall（HttpContext context，WebServiceMethodData methodData）“，
  “ExceptionType”： “System.InvalidOperationException”}

Answer 1

根据您的堆栈跟踪，我假设您在服务器端使用Asp.net？ 如果是这样，我相信Asp.net要求你有一个主对象包装json数据的对象列表。因此，请将您的输入更改为以下内容，并稍微更改您的服务器代码以处理额外的包装层：

var str = '{
"data": 
[
    {
        "Key": 6311,
        "Start": "123 Start",
        "End": "456 End ",
        "Date": "2/2/2012",
        "Order": null,
        "EstMiles": 0,
        "Stops": [
            {
                "StopAddy": "123 Stop Addy "
            },
            {
                "StopAddy": "456 Stop Addy"
            },
            {
                "StopAddy": "789 Stop Addy"
            }
        ]
    }
]
}'