[Solved] JsonSerializationException: Cannot deserialize the current JSON array into type because the type requires a JSON object to deserialize correctly

maideen

SOLVED CLOSED ACTIVE ANSWERED
User: maideen
Posted: on Oct 31, 2022 12:08 AM
Forum: ASP.Net Web Forms
Answer: 1
Views: 12853
Sample Code: Download

Hi Sir

I have an issue when using external api url. Error is

Newtonsoft.Json.JsonSerializationException: 'Cannot deserialize the current JSON array (e.g. [1,2,3]) into type because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.

Private Sub POST_TEST_DATA()
    Dim url = New RestClient("http://avalon.insignianetworks.cloud/srcargo/rest/getBookingList")
    ServicePointManager.Expect100Continue = True
    ServicePointManager.SecurityProtocol = CType(3072, SecurityProtocolType)
    url.Timeout = -1
 
    'Dim request = New RestRequest(Method.POST)
    Dim request = New RestRequest(Method.GET)
 
    request.AddHeader("Authorization", "Bearer 31|L1JWTR9MgAahBMn7PhbNbc7fzttmYVFJI9dDNhRo")
    Dim response As IRestResponse = url.Execute(request)
    Dim json As String = response.Content
    Dim res As BouncesAndBlocks = JsonConvert.DeserializeObject(Of BouncesAndBlocks)(json)  '' original
    For Each bouncesAndBlock In res.data
 
 
        Try
            Dim conString As String = ConfigurationManager.ConnectionStrings("ConnectString").ConnectionString
            Dim query As String = "INSERT INTO Red_X_temp " &
                                      "(sname, saddress1, saddress2, scity, spostcode, sstate," &
                                      "dairport, scountry, detailOfContent, weight, productPackages, " &
                                      "dimensionX, dimensionY, dimensionZ, chargeableRate, rname, rphone, " &
                                      "raddress1, raddress2, rpostcode, rcity, rstate, rairport, rcountry, " &
                                      "rremark, rvia, serviceModeId, agentId, trackingno)" &
                                   "VALUES" &
                                      "(@sname, @saddress1, @saddress2, @scity, @spostcode, @sstate," &
                                      "@dairport, @scountry, @detailOfContent, @weight, @productPackages, " &
                                      "@dimensionX, @dimensionY, @dimensionZ, @chargeableRate, @rname, @rphone, " &
                                      "@raddress1, @raddress2, @rpostcode, @rcity, @rstate, @rairport, @rcountry, " &
                                      "@rremark, @rvia, @serviceModeId, @agentId, @trackingno)"
 
            Using con As SqlConnection = New SqlConnection(conString)
                Dim cmd As SqlCommand = New SqlCommand(query, con)
 
                cmd.Parameters.AddWithValue("@sname", bouncesAndBlock.sname)
                cmd.Parameters.AddWithValue("@saddress1", bouncesAndBlock.saddress1)
                cmd.Parameters.AddWithValue("@saddress2", bouncesAndBlock.saddress2)
                cmd.Parameters.AddWithValue("@scity", bouncesAndBlock.scity)
                cmd.Parameters.AddWithValue("@spostcode", bouncesAndBlock.spostcode)
                cmd.Parameters.AddWithValue("@sstate", bouncesAndBlock.sstate)
                cmd.Parameters.AddWithValue("@dairport", bouncesAndBlock.dairport)
                cmd.Parameters.AddWithValue("@scountry", bouncesAndBlock.scountry)
                cmd.Parameters.AddWithValue("@detailOfContent", bouncesAndBlock.detailOfContent)
                cmd.Parameters.AddWithValue("@weight", bouncesAndBlock.weight)
                cmd.Parameters.AddWithValue("@productPackages", bouncesAndBlock.productPackages)
                cmd.Parameters.AddWithValue("@dimensionX", bouncesAndBlock.dimensionX)
                cmd.Parameters.AddWithValue("@dimensionY", bouncesAndBlock.dimensionY)
                cmd.Parameters.AddWithValue("@dimensionZ", bouncesAndBlock.dimensionZ)
                cmd.Parameters.AddWithValue("@chargeableRate", bouncesAndBlock.chargeableRate)
                cmd.Parameters.AddWithValue("@rname", bouncesAndBlock.rname)
                cmd.Parameters.AddWithValue("@rphone", bouncesAndBlock.rphone)
                cmd.Parameters.AddWithValue("@raddress1", bouncesAndBlock.raddress1)
                cmd.Parameters.AddWithValue("@raddress2", bouncesAndBlock.raddress2)
                cmd.Parameters.AddWithValue("@rpostcode", bouncesAndBlock.rpostcode)
                cmd.Parameters.AddWithValue("@rcity", bouncesAndBlock.rcity)
                cmd.Parameters.AddWithValue("@rstate", bouncesAndBlock.rstate)
                cmd.Parameters.AddWithValue("@rairport", bouncesAndBlock.rairport)
                cmd.Parameters.AddWithValue("@rcountry", bouncesAndBlock.rcountry)
                cmd.Parameters.AddWithValue("@rremark", bouncesAndBlock.rremark)
                cmd.Parameters.AddWithValue("@rvia", bouncesAndBlock.rvia)
                cmd.Parameters.AddWithValue("@serviceModeId", bouncesAndBlock.serviceModeId)
                cmd.Parameters.AddWithValue("@agentId", bouncesAndBlock.agentId)
                cmd.Parameters.AddWithValue("@trackingno", bouncesAndBlock.trackingNo)
                con.Open()
                cmd.ExecuteNonQuery()
                con.Close()
            End Using
 
            ScriptManager.RegisterStartupScript(Page, Page.GetType(), "alert", "alert('Record Saved !');", True)
        Catch ex As Exception
            ScriptManager.RegisterStartupScript(Page, Page.GetType(), "alert", "alert('Record wrong !');", True)
        End Try
    Next
 
End Sub

[
    {
        "id": 120,
        "trackingNo": "683123690493",
        "sname": "AMAN SALES SDN BHD",
        "sphone": "019-8824500",
        "saddress1": "NO 39/39A,JALAN 23 TAMAN",
        "saddress2": "BUKIT KUCHAI",
        "scity": "PUCHONG",
        "spostcode": "47100",
        "sstate": "Selangor",
        "dairport": "KUL",
        "scountry": "MY",
        "detailOfContent": "PARTS",
        "weight": 5.0,
        "productPackages": 1,
        "dimensionX": 40.0,
        "dimensionY": 28.0,
        "dimensionZ": 26.0,
        "chargebleRate": 5.0,
        "rname": "AMAN SALES & SERVICES (M) SDN BHD",
        "rphone": "089-880757",
        "raddress1": "LOT13 NEW KIMBELL INDUSTRIAL",
        "raddress2": "ESTATE,MDLD 4974,JALAN KIMBELL 91100",
        "rpostcode": "91100",
        "rcity": "LAHAD DATU",
        "rstate": "Sabah",
        "rairport": "LDU",
        "rcountry": "MY",
        "rremark": "PLEASE DEL  ASAP",
        "rvia": "BKI",
        "serviceModeId": null,
        "agentId": null
    }
]

Pls advice me

Thank you

Maideen

Below is what I have tried.

KasimA

0 6

Reply
ANSWER
User: KasimA
Replied: on Nov 05, 2022 04:26 AM
Modified: on Nov 05, 2022 05:00 AM
Report

Hi maideen,

You need to deserialized the json to Array of Data class.

Code

protected void Page_Load(object sender, EventArgs e)
{
    Root[] roots = JsonConvert.DeserializeObject<Root[]>(File.ReadAllText(Server.MapPath("~/json.json")));
}
public class Root
{
    public int id { get; set; }
    public string trackingNo { get; set; }
    public string sname { get; set; }
    public string sphone { get; set; }
    public string saddress1 { get; set; }
    public string saddress2 { get; set; }
    public string scity { get; set; }
    public string spostcode { get; set; }
    public string sstate { get; set; }
    public string dairport { get; set; }
    public string scountry { get; set; }
    public string detailOfContent { get; set; }
    public double weight { get; set; }
    public int productPackages { get; set; }
    public double dimensionX { get; set; }
    public double dimensionY { get; set; }
    public double dimensionZ { get; set; }
    public double chargebleRate { get; set; }
    public string rname { get; set; }
    public string rphone { get; set; }
    public string raddress1 { get; set; }
    public string raddress2 { get; set; }
    public string rpostcode { get; set; }
    public string rcity { get; set; }
    public string rstate { get; set; }
    public string rairport { get; set; }
    public string rcountry { get; set; }
    public string rremark { get; set; }
    public string rvia { get; set; }
    public object serviceModeId { get; set; }
    public object agentId { get; set; }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    Dim roots As Root() = JsonConvert.DeserializeObject(Of Root())(File.ReadAllText(Server.MapPath("~/json.json")))
End Sub

Public Class Root
    Public Property id As Integer
    Public Property trackingNo As String
    Public Property sname As String
    Public Property sphone As String
    Public Property saddress1 As String
    Public Property saddress2 As String
    Public Property scity As String
    Public Property spostcode As String
    Public Property sstate As String
    Public Property dairport As String
    Public Property scountry As String
    Public Property detailOfContent As String
    Public Property weight As Double
    Public Property productPackages As Integer
    Public Property dimensionX As Double
    Public Property dimensionY As Double
    Public Property dimensionZ As Double
    Public Property chargebleRate As Double
    Public Property rname As String
    Public Property rphone As String
    Public Property raddress1 As String
    Public Property raddress2 As String
    Public Property rpostcode As String
    Public Property rcity As String
    Public Property rstate As String
    Public Property rairport As String
    Public Property rcountry As String
    Public Property rremark As String
    Public Property rvia As String
    Public Property serviceModeId As Object
    Public Property agentId As Object
End Class

Screenshot

[Solved] JsonSerializationException: Cannot deserialize the current JSON array into type because the type requires a JSON object to deserialize correctly

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