Question

I have a multidimensional array converted to JSON data in this format.

"[[null,null,null,null,null,null],[null,null,null,1,1,null],[null,null,null,null,1,1],[null,null,null,null,null,null],[null,null,null,null,null,null]]"

I am trying to conver this multidimensional array of strings/integers to equivalent form using JavascriptSerializer like this

 Dim retValue As List(Of String)
 Dim deserializer As System.Web.Script.Serialization.JavaScriptSerializer = New System.Web.Script.Serialization.JavaScriptSerializer()

retValue deserializer.Deserialize(Of List(Of String))(o.value) 

Its throwing an exception: Type 'System.String' is not supported for deserialization of an array.

I tried the same casting it to Integers
, but the same exception occured.

How can I perform the conversion using .NET 3.5.

I dont want to use JSON.NET dll’s , if System.Web.Script.Serialization.JavaScriptSerializer can do the job.

Any suggestions?

Answer 1

I tried two ways in achieving the solution:-

As per “SeanCocteau’s comments:-

 Dim o As Object = JSONField
 Dim castObj() As Object = Nothing
 Dim ser As New DataContractJsonSerializer(GetType(System.Object))

 Using ms As New MemoryStream(System.Text.Encoding.UTF8.GetBytes(o.Value().ToString))
   castObj = ser.ReadObject(ms)
 End Using

 Dim convObject As ArrayList = New ArrayList(castObj)

In this format, I was able to get the arrayList and then take each internal arrayList by iterating and casting appropriately

Second solution I tried:-

    Dim o As Object =  JSONField
    Dim obj() As Object = (New JavaScriptSerializer()).Deserialize(Of Object)(o.Value.ToString())
    Dim convObject As ArrayList = New ArrayList(obj)

In this format also , I was able to get the arrayList and then take each internal arrayList by iterating and casting appropriately

Thanks SeanCocteau for giving the tip to Convert it to Object first 🙂