DoomBots DoomBots - 10 days ago 9
Vb.net Question

JSON.Net Cannot deserialize the current JSON array

I'm attempting to make a program for LoL that would allow users to view specific stats for a player. However, I'm having issues..

The error I'm getting is.


Additional information: Cannot deserialize the current JSON array
(e.g. [1,2,3]) into type 'WindowsApplication1.Form1+Rootobject'
because the type requires a JSON object (e.g. {"name":"value"}) to
deserialize correctly.


This is the code that I have so far.

Public Class Rootobject
Public Property games As Integer
Public Property winPercent As Double
Public Property order As List(Of Class1)
Public Property role As String
End Class

Public Class Class1
Public Property order() As String
End Class

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim client As WebClient = New WebClient()
client.Headers.Add("Content-Type", "application/json")
Dim reply As String = client.DownloadString("skills/mostPopular?api_key=")
Dim rootObject As Rootobject = JsonConvert.DeserializeObject(Of Rootobject)(reply)
MsgBox(rootObject.games)
End Sub


Here is how the JSON looks like. (Id post a URL but it requires an API key)

[
{
"games": 1650,
"winPercent": 46.9,
"order": [
"Q",
"W",
"E",
"Q",
"Q",
"R",
"Q",
"W",
"Q",
"W",
"R",
"W",
"W",
"E",
"E",
"R",
"E",
"E"
],
"role": "Support"
},
{
"games": 9769,
"winPercent": 51.8,
"order": [
"Q",
"W",
"E",
"Q",
"Q",
"R",
"Q",
"W",
"Q",
"W",
"R",
"W",
"W",
"E",
"E",
"R",
"E",
"E"
],
"role": "Middle"
}
]

Answer

Update the root object. The JSON in question resolves to the below class

Public Class Rootobject
    Public Property games As Integer
    Public Property winPercent As Double
    Public Property order As String()
    Public Property role As String
End Class

You are also trying to deserialize the array into a single object when the data is a collection.

Dim rootObjects As List(Of Rootobject) = JsonConvert.DeserializeObject(Of List(Of Rootobject))(reply)
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