How to deserialize object and retrieve the elements' values?

Question

1.00/5 (1 vote)

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Using the code below,

C#

HttpContext context.Response.ContentType = "application/json";
var data = context.Request;
var sr = new StreamReader(data.InputStream);
var stream = sr.ReadToEnd();
var javaScriptSerializer = new System.Web.Script.Serialization.JavaScriptSerializer();
var obj = javaScriptSerializer.DeserializeObject(stream);
object[] arr = (object[])obj;

The result of arr obtained. The arr is a 3-level array object. E.g., below is the displayed in Watch panel:

Name   Value            Type
arr[2] {object[3]       object{object[]}
   [0] {object[2]       object{object[]}
   [1] {object[2]       object{object[]}
   [2] {object[2]       object{object[]}
      [0] "6512"        object{string}
      [1] "In Invert"   object{string}

I tried to get retrieve the values of the elements, e.g. arr[2][2][2], but failed.
Then, from Immediate Window, I retrieved arr[2] (see below).

C#

arr[2].GetType()
{Name = "Object[]" FullName = "System.Object[]"}
    [System.RuntimeType]: {Name = "Object[]" FullName = "System.Object[]"}
    base {System.Reflection.MemberInfo}: {Name = "Object[]" FullName = "System.Object[]"}
    Assembly: {mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089}
    AssemblyQualifiedName: "System.Object[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
    Attributes: Public | Sealed | Serializable
    BaseType: {Name = "Array" FullName = "System.Array"}
    ContainsGenericParameters: false
    DeclaringMethod: 'obj.GetType().DeclaringMethod' threw an exception of type 'System.InvalidOperationException'
    DeclaringType: null
    FullName: "System.Object[]"
    GenericParameterAttributes: 'obj.GetType().GenericParameterAttributes' threw an exception of type 'System.InvalidOperationException'
    GenericParameterPosition: 'obj.GetType().GenericParameterPosition' threw an exception of type 'System.InvalidOperationException'
    GenericTypeArguments: {System.Type[0]}
    GUID: {00000000-0000-0000-0000-000000000000}
    HasElementType: true
    IsAbstract: false
    IsAnsiClass: true
    IsArray: true
    IsAutoClass: false
    IsAutoLayout: true
    IsByRef: false
    IsClass: true
    IsCOMObject: false
    IsConstructedGenericType: false
    IsContextful: false
    IsEnum: false
    IsExplicitLayout: false
    IsGenericParameter: false
    IsGenericType: false
    IsGenericTypeDefinition: false
    IsImport: false
    IsInterface: false
    IsLayoutSequential: false
    IsMarshalByRef: false
    IsNested: false
    IsNestedAssembly: false
    IsNestedFamANDAssem: false
    IsNestedFamily: false
    IsNestedFamORAssem: false
    IsNestedPrivate: false
    IsNestedPublic: false
    IsNotPublic: false
    IsPointer: false
    IsPrimitive: false
    IsPublic: true
    IsSealed: true
    IsSecurityCritical: false
    IsSecuritySafeCritical: false
    IsSecurityTransparent: true
    IsSerializable: true
    IsSpecialName: false
    IsUnicodeClass: false
    IsValueType: false
    IsVisible: true
    MemberType: TypeInfo
    Module: {CommonLanguageRuntimeLibrary}
    Namespace: "System"
    ReflectedType: null
    StructLayoutAttribute: null
    TypeHandle: {System.RuntimeTypeHandle}
    TypeInitializer: null
    UnderlyingSystemType: {Name = "Object[]" FullName = "System.Object[]"}

Since its IsEnm property is false, I don't know how I can get the sub-objects: arr[2][0] and arr[2][1].
I don't know if there is method to convert object[] to object so I can retrieve the sub-objects.
Hopefully, someone can help for this issue. Thanks.

What I have tried:

How to Deserialize object and retrieve the elements' values?

Posted 29-Sep-16 3:18am

s yu

Updated 30-Sep-16 2:30am

v6

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Comments

F-ES Sitecore 29-Sep-16 9:24am

Deserialise where? In .net code? Javascript? Have you googled "c# deserialise object" and followed the many articles and tutorials?

s yu 29-Sep-16 10:19am

I did successfully for 2-level ( Level 1: object{object[]}, Level 2: object{string} object array from string (variable name: stream, see above). Now I need to do it on 3-level one. I need to deseriliaze the Level 1: object{object[]} into Level 2: object{object[]}. Then I should be able to further deseriliaze Level 2: object{object[]} to Level 3 object{string}. I got stuck on deseriliazing object{object[]} into another Level object{object[]}. Thanks for your review.

[no name] 29-Sep-16 16:05pm

Another answer would be to read the answers you have already been given.

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David_Wimbley · Answer 1 · 2016-09-29T09:43:00

Solution 1

You haven't stated an issue with your code, but since you expect someone to answer here is one option.

1) Use the Newtonsoft.Json library instead of the .net library - Json.NET - Newtonsoft[^]

2) Go to json2csharp.com and convert your json string to C# classes - json2csharp - generate c# classes from json[^]

This will create classes based on your nested/multi dimensional array that are serializeable/deserializable using JSON.net library

3) To serialize your class structure to JSON you would then do something like this

C#

string json = JsonConvert.SerializeObject(myJson2CsharpModel);

4) To deserialize it you would do something like

C#

MyJson2CsharpModel model = JsonConvert.DeserializeObject<MyJson2CsharpModel>(json);

Posted 29-Sep-16 9:43am

David_Wimbley

Comments

s yu 30-Sep-16 6:54am

David: Thank you VERY much for your response, esp. the source in 2). I tried the json2sharp for the json string (see below), which is generagted from
string json = JsonConvert.SerializeObject(stream, Formatting.Indented);
But I got the message below:
"Parsing your JSON didn't work. Please make sure it's valid. Already did that? Please let me know so I can fix it."
I should explain something additional here. In my JavaScript code, I create an Array, and then push 4 arrays (different structure) into this one. Then the composited array is POSTed through AJAX. In my .ashx, I got the json string.
In my case, I need to further deserialize an object, which contains 4 objects, into sub-objects if the sub-object is {object[]} rather than {object:string}. Do you hav any idea how to deal w/ this case? Thanks again.

// json string
"[[\"C04R032\",\"OB-C-3J\",\"C04\",\"TRACKWAY\",\"PRIVATE\",\"BRASS DISK\",38.900749999999995,-77.05172999999999],[\"75+82.00\",\"OUTBOUND\",\"\",\"\",\"SCS\"],[[\"6512\",\"IN INVERT\"],[\"15977\",\"null\"]],[[\"\",\"\",\"METRO\",\"5/28/1905\",\"SET\",\"388713.741\",\"785235.645\",\"\",\"\",\"\"],[\"\",\"ADJUSTED\",\"NAD27MD\",\"5/28/1905\",\"SET\",\"388691.5843\",\"785190.8866\",\"\",\"\",\"\"],[\"\",\"PGIS\",\"NAD83MD1991\",\"\",\"RECNORECORD\",\"449439.865\",\"1297611.009\",\"\",\"\",\"\"],[\"\",\"PGIS\",\"LDPNSRS2007\",\"\",\"RECNORECORD\",\"174553.7598\",\"194763.7164\",\"\",\"\",\"\"]]]"

s yu 3-Oct-16 13:24pm

I have decided to adopt another approach to process the data. Thanks.