C# Getting individual data from JSON text downloaded from a site

C# Getting individual data from JSON text downloaded from a site - c#

I've been searching around for a long while for this, I haven't found any solutions to my issue which is:
I've been trying get a json data individually from a whole source seen here:
{"TargetId":0,"ProductType":null,"AssetId":1239281845,"ProductId":0,"Name":"❤️🍀𝐒𝐀𝐋𝐄❗️🍀❤️ Red&Black Flannel + Backpack","Description":"Shirt Image","AssetTypeId":1,"Creator":{"Id":124026176,"Name":"TheDestroyerPeter","CreatorType":"User","CreatorTargetId":124026176},"IconImageAssetId":0,"Created":"2017-12-12T19:48:24.693Z","Updated":"2017-12-12T19:48:24.693Z","PriceInRobux":null,"PriceInTickets":null,"Sales":0,"IsNew":false,"IsForSale":false,"IsPublicDomain":false,"IsLimited":false,"IsLimitedUnique":false,"Remaining":null,"MinimumMembershipLevel":0,"ContentRatingTypeId":0}
now what I've been trying to do with it is get the Product Name using C# and the product name is "❤️🍀𝐒𝐀𝐋𝐄❗️🍀❤️ Red&Black Flannel + Backpack", my issue is that I haven't found a way to extract the data, and when I have I haven't been able to get the right data, because instead if gives me "TheDestroyerPeter"
I've written up code, and deleted it, it was really sloppy and it would take awhile to rewrite, I appreciate any solutions
-whoever I am

You can use JavaScriptSerializer class, which is part of the System.Web.Script namespace.
For example :
var jsonString = #"{""name"":""John Doe"",""age"":20}";
var JSONObj = new JavaScriptSerializer().Deserialize<Dictionary<string, string>>(jsonString );
and then JSONObj["name"]; gives you "John Doe"
in this case you can use it :
public class Creator
{
public int Id { get; set; }
public string Name { get; set; }
public string CreatorType { get; set; }
public int CreatorTargetId { get; set; }
}
public class RootObject
{
public int TargetId { get; set; }
public object ProductType { get; set; }
public int AssetId { get; set; }
public int ProductId { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public int AssetTypeId { get; set; }
public Creator Creator { get; set; }
public int IconImageAssetId { get; set; }
public DateTime Created { get; set; }
public DateTime Updated { get; set; }
public object PriceInRobux { get; set; }
public object PriceInTickets { get; set; }
public int Sales { get; set; }
public bool IsNew { get; set; }
public bool IsForSale { get; set; }
public bool IsPublicDomain { get; set; }
public bool IsLimited { get; set; }
public bool IsLimitedUnique { get; set; }
public object Remaining { get; set; }
public int MinimumMembershipLevel { get; set; }
public int ContentRatingTypeId { get; set; }
}
use Newtonsoft.Json
var jsonString = #"{""TargetId"":0,""ProductType"":null,""AssetId"":1239281845,""ProductId"":0,""Name"":""❤️🍀𝐒𝐀𝐋𝐄❗️🍀❤️ Red&Black Flannel + Backpack"",""Description"":""Shirt Image"",""AssetTypeId"":1,""Creator"":{""Id"":124026176,""Name"":""TheDestroyerPeter"",""CreatorType"":""User"",""CreatorTargetId"":124026176},""IconImageAssetId"":0,""Created"":""2017-12-12T19:48:24.693Z"",""Updated"":""2017-12-12T19:48:24.693Z"",""PriceInRobux"":null,""PriceInTickets"":null,""Sales"":0,""IsNew"":false,""IsForSale"":false,""IsPublicDomain"":false,""IsLimited"":false,""IsLimitedUnique"":false,""Remaining"":null,""MinimumMembershipLevel"":0,""ContentRatingTypeId"":0}";
var obj = JsonConvert.DeserializeObject<RootObject>(jsonString);
Console.WriteLine(obj.Creator.Name); //"TheDestroyerPeter"

Related

Obtaining YouTube Statistics Using JSON (UWP, C#)

been a while since I posted here. I'm working on an app and need to fetch statistics for a particular video using JSON (C#, UWP).
I already have the statistics as a JSON string but can't seem to parse them properly using Newtonsoft. The value always comes back null. This is my code:
var url = "https://www.googleapis.com/youtube/v3/videos?id=" + videoId + "&key=" + cl.googleAPIKey + "&part=snippet,contentDetails,statistics,status";
var http = new HttpClient();
var response = await http.GetStringAsync(url);
var statistics = JsonConvert.DeserializeObject<Statistics>(response);
string totalViews = statistics.viewCount;
The classes generated by Json2CSharp are:
public class PageInfo
{
public int totalResults { get; set; }
public int resultsPerPage { get; set; }
}
public class Default
{
public string url { get; set; }
public int width { get; set; }
public int height { get; set; }
}
public class Medium
{
public string url { get; set; }
public int width { get; set; }
public int height { get; set; }
}
public class High
{
public string url { get; set; }
public int width { get; set; }
public int height { get; set; }
}
public class Standard
{
public string url { get; set; }
public int width { get; set; }
public int height { get; set; }
}
public class Maxres
{
public string url { get; set; }
public int width { get; set; }
public int height { get; set; }
}
public class Thumbnails
{
public Default #default { get; set; }
public Medium medium { get; set; }
public High high { get; set; }
public Standard standard { get; set; }
public Maxres maxres { get; set; }
}
public class Localized
{
public string title { get; set; }
public string description { get; set; }
}
public class Snippet
{
public DateTime publishedAt { get; set; }
public string channelId { get; set; }
public string title { get; set; }
public string description { get; set; }
public Thumbnails thumbnails { get; set; }
public string channelTitle { get; set; }
public List<string> tags { get; set; }
public string categoryId { get; set; }
public string liveBroadcastContent { get; set; }
public Localized localized { get; set; }
}
public class ContentDetails
{
public string duration { get; set; }
public string dimension { get; set; }
public string definition { get; set; }
public string caption { get; set; }
public bool licensedContent { get; set; }
public string projection { get; set; }
}
public class Status
{
public string uploadStatus { get; set; }
public string privacyStatus { get; set; }
public string license { get; set; }
public bool embeddable { get; set; }
public bool publicStatsViewable { get; set; }
}
public class Statistics
{
public string viewCount { get; set; }
public string likeCount { get; set; }
public string dislikeCount { get; set; }
public string favoriteCount { get; set; }
public string commentCount { get; set; }
}
public class Item
{
public string kind { get; set; }
public string etag { get; set; }
public string id { get; set; }
public Snippet snippet { get; set; }
public ContentDetails contentDetails { get; set; }
public Status status { get; set; }
public Statistics statistics { get; set; }
}
public class RootObject
{
public string kind { get; set; }
public string etag { get; set; }
public PageInfo pageInfo { get; set; }
public List<Item> items { get; set; }
}
As I say the value will always come back as null regardless of the video ID.
Does anyone have any ideas?
Thanks

You are deserializing to the wrong class. Json2Csharp generated many classes, but Statistics is way down the tree. You should deserialize the RootObject instead:
var root = JsonConvert.DeserializeObject<RootObject>( response );
And then navigate to the statistics within the resulting class structure like for example:
foreach ( var statistics in root.Items.Select( i => i.Statistics) )
{
//do something
}

Deserializing JSON objects, keep getting errors (C#)

I am trying to deserialize my json code. The json code is in a string, and the json code looks like this (so I'm assuming it's json objects)
{
"post_id":13,
"thread_id":9,
"user_id":1,
"username":"Username",
"post_date":1496439611,
"message":"testzilla - 2133746943A9",
"ip_id":698,
"message_state":"visible",
"attach_count":0,
"position":0,
"likes":0,
"like_users":"a:0:{}",
"warning_id":0,
"warning_message":"",
"last_edit_date":1496476199,
"last_edit_user_id":0,
"edit_count":9,
"node_id":34,
"title":"Test",
"tags":"a:0:{}",
"node_title":"test node",
"node_name":null,
"message_html":"testzilla - 2133746943A9",
"absolute_url":"url"
}
How would I put the "message" container inside a string? So that the string would contain "testzilla - 2133746943A9" without the quotation marks. I am using JSON.Net
The name of the string that contains this json code is "MACs". Thanks in advance. PS: I am a new coder.

there is a missing "{" at the beginning of your json file, try adding it

You need to create your c# class to deserialize your json string. As per your json structure i have created your class given below
public class MyClass
{
public int post_id { get; set; }
public int thread_id { get; set; }
public int user_id { get; set; }
public string username { get; set; }
public int post_date { get; set; }
public string message { get; set; }
public int ip_id { get; set; }
public string message_state { get; set; }
public int attach_count { get; set; }
public int position { get; set; }
public int likes { get; set; }
public string like_users { get; set; }
public int warning_id { get; set; }
public string warning_message { get; set; }
public int last_edit_date { get; set; }
public int last_edit_user_id { get; set; }
public int edit_count { get; set; }
public int node_id { get; set; }
public string title { get; set; }
public string tags { get; set; }
public string node_title { get; set; }
public object node_name { get; set; }
public string message_html { get; set; }
public string absolute_url { get; set; }
}
No need to use library JSON.Net. You can do this by simply using System.Web.Script.Serialization to deserialize the json string.
Note : System.Web.Script.Serialization is available inside System.Web.Extensions namespace.
Below is the complete code. I kept your json data inside a file named as "test2.json" and consuming it from that file.
using System;
using System.Web.Script.Serialization;
using System.IO;
namespace DesrializeJson1ConsoleApp
{
class Program
{
static void Main(string[] args)
{
var jsonFile = "test2.json";
string jsonstring = File.ReadAllText(jsonFile);
var serializer = new JavaScriptSerializer();
MyClass aClass = serializer.Deserialize<MyClass>(jsonstring);
Console.WriteLine("--------------------------");
Console.WriteLine("message :" + aClass.message);
Console.WriteLine("message_state :" + aClass.message_state);
Console.WriteLine("warning_message :" + aClass.warning_message);
Console.WriteLine("message_html :" + aClass.message_html);
Console.WriteLine("--------------------------");
Console.Read();
}
}
public class MyClass
{
public int post_id { get; set; }
public int thread_id { get; set; }
public int user_id { get; set; }
public string username { get; set; }
public int post_date { get; set; }
public string message { get; set; }
public int ip_id { get; set; }
public string message_state { get; set; }
public int attach_count { get; set; }
public int position { get; set; }
public int likes { get; set; }
public string like_users { get; set; }
public int warning_id { get; set; }
public string warning_message { get; set; }
public int last_edit_date { get; set; }
public int last_edit_user_id { get; set; }
public int edit_count { get; set; }
public int node_id { get; set; }
public string title { get; set; }
public string tags { get; set; }
public string node_title { get; set; }
public object node_name { get; set; }
public string message_html { get; set; }
public string absolute_url { get; set; }
}
}
OUTPUT

You can use regex to get the value you want.
string yourJsonString = #"{ ""post_id"":13, ""thread_id"":9, ""user_id"":1, ""username"":""Username"", ""post_date"":1496439611, ""message"":""testzilla - 2133746943A9"", ""ip_id"":698, ""message_state"":""visible"", ""attach_count"":0, ""position"":0, ""likes"":0, ""like_users"":""a:0:{}"", ""warning_id"":0, ""warning_message"":"""", ""last_edit_date"":1496476199, ""last_edit_user_id"":0, ""edit_count"":9, ""node_id"":34, ""title"":""Test"", ""tags"":""a:0:{}"", ""node_title"":""test node"", ""node_name"":null, ""message_html"":""testzilla - 2133746943A9"", ""absolute_url"":""url""}";
string value = System.Text.RegularExpressions.Regex.Match(yourJsonString,#"""message"":(.+?),").Groups[1].Value.Replace(#"""","");
MessageBox.Show(value);

You can also use dynamic type for deserialization. You will no need to write object for deserialization:
var str = "{\r\n \"post_id\":13,\r\n \"thread_id\":9,\r\n \"user_id\":1,\r\n \"username\":\"Username\",\r\n \"post_date\":1496439611,\r\n \"message\":\"testzilla - 2133746943A9\",\r\n \"ip_id\":698,\r\n \"message_state\":\"visible\",\r\n \"attach_count\":0,\r\n \"position\":0,\r\n \"likes\":0,\r\n \"like_users\":\"a:0:{}\",\r\n \"warning_id\":0,\r\n \"warning_message\":\"\",\r\n \"last_edit_date\":1496476199,\r\n \"last_edit_user_id\":0,\r\n \"edit_count\":9,\r\n \"node_id\":34,\r\n \"title\":\"Test\",\r\n \"tags\":\"a:0:{}\",\r\n \"node_title\":\"test node\",\r\n \"node_name\":null,\r\n \"message_html\":\"testzilla - 2133746943A9\",\r\n \"absolute_url\":\"url\"\r\n}";
dynamic obj = JsonConvert.DeserializeObject(str);
var postId = obj.post_id;
Console.WriteLine("postId:" + postId);
output:
postId:13

Not getting object data from Json deserialization

I am getting Json data from a web server, but when I try to deserialize it to objects, I am not getting any data. The Json string looks like this:
{"success":true,"data":[{"Id":6,"CustomerGuid":"70b390d8-82d5-4bba-aa68-fc8268a1b1ff","UserName":"victoria_victoria#nopCommerce.com","Email":"victoria_victoria#nopCommerce.com","CustomerRoles":[{"Id":3,"Name":"Registered","SystemName":"Registered"}],"AdminComment":null,"IsTaxExempt":false,"AffiliateId":0,"VendorId":0,"HasShoppingCartItems":false,"Active":false,"Deleted":false,"IsSystemAccount":false,"SystemName":null,"LastIpAddress":null,"CreatedOnUtc":"\/Date(1472933472393)\/","LastLoginDateUtc":null,"LastActivityDateUtc":"\/Date(1472933472393)\/","ExternalAuthenticationRecords":[],"ShoppingCartItems":[]},{"Id":5,"CustomerGuid":"eb9e6f24-f362-4c10-942a-366e2919dc11","UserName":"brenda_lindgren#nopCommerce.com","Email":"brenda_lindgren#nopCommerce.com","CustomerRoles":[{"Id":3,"Name":"Registered","SystemName":"Registered"}],"AdminComment":null,"IsTaxExempt":false,"AffiliateId":0,"VendorId":0,"HasShoppingCartItems":false,"Active":false,"Deleted":false,"IsSystemAccount":false,"SystemName":null,"LastIpAddress":null,"CreatedOnUtc":"\/Date(1472933472363)\/","LastLoginDateUtc":null,"LastActivityDateUtc":"\/Date(1472933472363)\/","ExternalAuthenticationRecords":[],"ShoppingCartItems":[]},{"Id":4,"CustomerGuid":"9f46dbae-6942-410c-90b8-9b38a0890064","UserName":"james_pan#nopCommerce.com","Email":"james_pan#nopCommerce.com","CustomerRoles":[{"Id":3,"Name":"Registered","SystemName":"Registered"}],"AdminComment":null,"IsTaxExempt":false,"AffiliateId":0,"VendorId":0,"HasShoppingCartItems":false,"Active":false,"Deleted":false,"IsSystemAccount":false,"SystemName":null,"LastIpAddress":null,"CreatedOnUtc":"\/Date(1472933472317)\/","LastLoginDateUtc":null,"LastActivityDateUtc":"\/Date(1472933472317)\/","ExternalAuthenticationRecords":[],"ShoppingCartItems":[]},{"Id":3,"CustomerGuid":"6277386b-13ee-427b-9cfe-4ebfa487c340","UserName":"arthur_holmes#nopCommerce.com","Email":"arthur_holmes#nopCommerce.com","CustomerRoles":[{"Id":3,"Name":"Registered","SystemName":"Registered"}],"AdminComment":null,"IsTaxExempt":false,"AffiliateId":0,"VendorId":0,"HasShoppingCartItems":false,"Active":false,"Deleted":false,"IsSystemAccount":false,"SystemName":null,"LastIpAddress":null,"CreatedOnUtc":"\/Date(1472933472253)\/","LastLoginDateUtc":null,"LastActivityDateUtc":"\/Date(1472933472253)\/","ExternalAuthenticationRecords":[],"ShoppingCartItems":[]},{"Id":2,"CustomerGuid":"241f45f1-b38c-4e22-8c5a-743fa3276620","UserName":"steve_gates#nopCommerce.com","Email":"steve_gates#nopCommerce.com","CustomerRoles":[{"Id":3,"Name":"Registered","SystemName":"Registered"}],"AdminComment":null,"IsTaxExempt":false,"AffiliateId":0,"VendorId":0,"HasShoppingCartItems":false,"Active":false,"Deleted":false,"IsSystemAccount":false,"SystemName":null,"LastIpAddress":null,"CreatedOnUtc":"\/Date(1472933472207)\/","LastLoginDateUtc":null,"LastActivityDateUtc":"\/Date(1472933472207)\/","ExternalAuthenticationRecords":[],"ShoppingCartItems":[]},{"Id":1,"CustomerGuid":"a940dc03-5f52-47d2-9391-8597b3b31cf2","UserName":"tony#lakesideos.com","Email":"tony#lakesideos.com","CustomerRoles":[{"Id":1,"Name":"Administrators","SystemName":"Administrators"},{"Id":2,"Name":"Forum Moderators","SystemName":"ForumModerators"},{"Id":3,"Name":"Registered","SystemName":"Registered"}],"AdminComment":null,"IsTaxExempt":false,"AffiliateId":0,"VendorId":0,"HasShoppingCartItems":true,"Active":true,"Deleted":false,"IsSystemAccount":false,"SystemName":null,"LastIpAddress":"71.185.255.7","CreatedOnUtc":"\/Date(1472933470783)\/","LastLoginDateUtc":"\/Date(1477522483903)\/","LastActivityDateUtc":"\/Date(1477523996553)\/","ExternalAuthenticationRecords":[],"ShoppingCartItems":[{"Id":1,"StoreId":1,"ShoppingCartTypeId":1,"CustomerId":1,"ProductId":18,"AttributesXml":null,"CustomerEnteredPrice":0.0000,"Quantity":1,"CreatedOnUtc":"\/Date(1473801903447)\/","UpdatedOnUtc":"\/Date(1473803336207)\/","IsFreeShipping":false,"IsShipEnabled":true,"AdditionalShippingCharge":0.0000,"IsTaxExempt":false}]}]}
I created these classes from the recommendation given in this link:
recommendation
I used this to create the classes: json2csharp
Response class:
class Response
{
bool success;
IList<Customer> data;
}
Customer class:
class Customer
{
public int Id { get; set; }
public string CustomerGuid { get; set; }
public string UserName { get; set; }
public string Email { get; set; }
public List<CustomerRole> CustomerRoles { get; set; }
public object AdminComment { get; set; }
public bool IsTaxExempt { get; set; }
public int AffiliateId { get; set; }
public int VendorId { get; set; }
public bool HasShoppingCartItems { get; set; }
public bool Active { get; set; }
public bool Deleted { get; set; }
public bool IsSystemAccount { get; set; }
public object SystemName { get; set; }
public string LastIpAddress { get; set; }
public DateTime CreatedOnUtc { get; set; }
public DateTime? LastLoginDateUtc { get; set; }
public DateTime LastActivityDateUtc { get; set; }
public List<object> ExternalAuthenticationRecords { get; set; }
public List<object> ShoppingCartItems { get; set; }
}
CustomerRole class:
class CustomerRole
{
public int Id { get; set; }
public string Name { get; set; }
public string SystemName { get; set; }
}
ExternalAuthenticationRecord class:
class ExternalAuthenticationRecord
{
public int Id { get; set; }
public int CustomerId { get; set; }
public string Email { get; set; }
public object ExternalIdentifier { get; set; }
public object ExternalDisplayIdentifier { get; set; }
public object OAuthToken { get; set; }
public object OAuthAccessToken { get; set; }
public string ProviderSystemName { get; set; }
}
ShoppingCartItem class:
class ShoppingCartItem
{
public int Id { get; set; }
public int StoreId { get; set; }
public int ShoppingCartTypeId { get; set; }
public int CustomerId { get; set; }
public int ProductId { get; set; }
public object AttributesXml { get; set; }
public double CustomerEnteredPrice { get; set; }
public int Quantity { get; set; }
public DateTime CreatedOnUtc { get; set; }
public DateTime UpdatedOnUtc { get; set; }
public bool IsFreeShipping { get; set; }
public bool IsShipEnabled { get; set; }
public double AdditionalShippingCharge { get; set; }
public bool IsTaxExempt { get; set; }
}
I am using this statement to deserialzie the Json string: Response res = (Response)JsonConvert.DeserializeObject(customerJson, (typeof(Response)));
When I stop it in the debugger, it shows "res" as data: null and success: false.
I am not getting any errors. It is just not giving me the data from the Json string.
Any help that anybody can provide to figure out why I'm not getting the data I want in "res", would be gratefully appreciated.
Thanks,
Tony

The problem is related to the accessibility level in your Response class. By default the fields, property and method are private so JsonConvert is not able to fill the properties.
Change the class as follow:
class Response
{
public bool success {get; set;}
public IList<Customer> data {get; set;}
}
And it wil works.
Another improvement is related to the JsonConvert use. To avoid the explicit cast use this type conversion: JsonConvert.DeserializeObject<T>(string) where T will be Response

JSONConvert.DeserializeObject not handling child array with unnamed array items

I have the following JSON object coming to me from a web service
{
"room":{
"name":"Thunderdome",
"created_at":"2012/04/15 00:36:27 +0000",
"id":xxxxxxx,
"users":[
{
"type":"Member",
"avatar_url":"url",
"created_at":"2012/02/27 14:11:57 +0000",
"id":1139474,
"email_address":"xxx#xxxxxxx.com",
"admin":false,
"name":"xxxx xxxxx"
},
{
"type":"Member",
etc
I'm using the following line to deserialize:
var room = JsonConvert.DeserializeObject<SingleRoom>(text);
And the following mapping classes
public class SingleRoom
{
public Room Room { get; set; }
}
[DataContract]
public class Room
{
[DataMember]
public int Id { get; set; }
[DataMember]
public string Name { get; set; }
public string Image {
get { return "Assets/campfire.png"; }
}
[DataMember]
public string Topic { get; set; }
[DataMember(Name ="membership_limit")]
public int MembershipLimit { get; set; }
[DataMember]
public bool Full { get; set; }
[DataMember]
public bool Locked { get; set; }
[DataMember(Name = "open_to_guests")]
public bool OpenToGuests { get; set; }
[DataMember(Name = "updated_at")]
public DateTime UpdatedAt { get; set; }
[DataMember(Name = "created_at")]
public DateTime CreatedAt { get; set; }
[DataMember(Name = "active_token_value")]
public string ActiveTokenValue { get; set; }
[DataMember(Name = "Users")]
public List<User> Users { get; set; }
}
[DataContract]
public class User
{
[DataMember]
public int Id { get; set; }
[DataMember]
public string Name { get; set; }
[DataMember(Name = "email_address")]
public string EmailAddress { get; set; }
[DataMember]
public bool Admin { get; set; }
[DataMember]
public DateTime CreatedAt { get; set; }
[DataMember]
public string Type { get; set; }
[DataMember(Name = "avatar_url")]
public string AvatarUrl { get; set; }
}
The 'Room' object deserializes correctly but the Users property on the Room is always null. I know that a null result is the result of a JSON.NET serialization that couldn't find the matching property. However, I think I have it right? List should match to user. I know the array object users in the JSON doesn't have named children, is that the issue? If so, how do I solve it?
Thanks!

This works.... You can rename them (or use JsonProperty attribute) to use c# style property names
(BTW: Json.Net doesn't require DataMember, DataContract attributes)
var obj = JsonConvert.DeserializeObject<SingleRoom>(json)
public class User
{
public string type { get; set; }
public string avatar_url { get; set; }
public string email_address { get; set; }
public bool admin { get; set; }
public string name { get; set; }
public string created_at { get; set; }
public int id { get; set; }
}
public class Room
{
public string topic { get; set; }
public int membership_limit { get; set; }
public bool locked { get; set; }
public string name { get; set; }
public List<User> users { get; set; }
public bool full { get; set; }
public bool open_to_guests { get; set; }
public string updated_at { get; set; }
public string created_at { get; set; }
public int id { get; set; }
}
public class SingleRoom
{
public Room room { get; set; }
}
PS: You may find that site useful http://json2csharp.com/ .

In my case, I had missing to add the "public" key for the child property.

Windows 8 C#/XAML SuspensionManager failed

I'm writing simple imageviewer for one imageboard. I'm using these 2 classes for navigation(navigation parameter for Frame.Navigate() method) in my app:
public class KonaParameter
{
public int page { get; set; }
public string tags { get; set; }
public KonaParameter()
{
page = 1;
}
}
public class Post
{
public int id { get; set; }
public string tags { get; set; }
public int created_at { get; set; }
public int creator_id { get; set; }
public string author { get; set; }
public int change { get; set; }
public string source { get; set; }
public int score { get; set; }
public string md5 { get; set; }
public int file_size { get; set; }
public string file_url { get; set; }
public bool is_shown_in_index { get; set; }
public string preview_url { get; set; }
public int preview_width { get; set; }
public int preview_height { get; set; }
public int actual_preview_width { get; set; }
public int actual_preview_height { get; set; }
public string sample_url { get; set; }
public int sample_width { get; set; }
public int sample_height { get; set; }
public int sample_file_size { get; set; }
public string jpeg_url { get; set; }
public int jpeg_width { get; set; }
public int jpeg_height { get; set; }
public int jpeg_file_size { get; set; }
public string rating { get; set; }
public bool has_children { get; set; }
public object parent_id { get; set; }
public string status { get; set; }
public int width { get; set; }
public int height { get; set; }
public bool is_held { get; set; }
public string frames_pending_string { get; set; }
public List<object> frames_pending { get; set; }
public string frames_string { get; set; }
public List<object> frames { get; set; }
public object flag_detail { get; set; }
}
The problem I faced is that suspending doesn't work. SuspensionManager throws "SuspensionManager failed" exception after await SuspensionManager.SaveAsync(); call(I googled that it's because of using complex types).
I tried to use string as a navigation parameter. It works, but I need more than 1 string for my parameter(List<string> doesn't work, I tried to use it).
How to suspend my app correctly?

The problem is that SuspensionManager uses Frame.GetNavigationState() to get the history of the Frame. It then tries to serialise the navigation history to a string, unfortunately it has no way to know how to serialise custom complex types as parameters like Post or KonaParameter and fails with an exception.
If you want to use SuspensionManager then you'll need to restrict yourself to simple types like int or string as parameters.
If you do need complex types then it's best to store them in some background service / repository with an identifier. You can then pass the identifier as the parameter.

The recommended approach is to serialize your "state" object, so it can be saved/restored as a string. You can use Json.NET to do this:
//save state
Post post = //...;
string state = JsonConvert.Serialize(post)
//restore state
Post post = JsonConvert.Deserialize<Post>(state);
If you want to use two objects (a Post and a KonaParameter), I'd consider creating an "aggregate" class that encapsulates both, and serializing/deserializing that instead:
public class State
{
public Post post {get; set;}
public KonaParameter param {get; set;}
}

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