How does one read a very large JSON file into an array in c# to be split up for later processing?
I have managed to get something working that will:
Read the file Miss out headers and only read values into array.
Place a certain amount of values on each line of an array. (So I
could later split it an put into 2d array)
This was done with the code below but it crashes the program after entering a few lines into the array. This might have to do with the file size.
// If the file extension was a jave file the following
// load method will be use else it will move on to the
// next else if statement
if (fileExtension == ".json")
{
int count = 0;
int count2 = 0;
int inOrOut = 0;
int nRecords=1;
JsonTextReader reader = new JsonTextReader(new StreamReader(txtLoaction.Text));
string[] rawData = new string[5];
while (reader.Read())
{
if (reader.Value != null)
if (inOrOut == 1)
{
if (count == 6)
{
nRecords++;
Array.Resize(ref rawData, nRecords);
//textBox1.Text += "\r\n";
count = 0;
}
rawData[count2] += reader.Value + ","; //+"\r\n"
inOrOut = 0;
count++;
if (count2 == 500)
{
MessageBox.Show(rawData[499]);
}
}
else
{
inOrOut = 1;
}
}
}
A snippet of the JSON I am working with is:
[
{ "millis": "1000",
"stamp": "1273010254",
"datetime": "2010/5/4 21:57:34",
"light": "333",
"temp": "78.32",
"vcc": "3.54" },
]
I need the values out of this JSON. For example, I need "3.54", but I would not want it to print the "vcc".
How can one read a JSON file in and only extract the data needed to be put into an array?
How about making everything easier with Json.NET?
public void LoadJson()
{
using (StreamReader r = new StreamReader("file.json"))
{
string json = r.ReadToEnd();
List<Item> items = JsonConvert.DeserializeObject<List<Item>>(json);
}
}
public class Item
{
public int millis;
public string stamp;
public DateTime datetime;
public string light;
public float temp;
public float vcc;
}
You can even get the values dynamically without declaring Item class.
dynamic array = JsonConvert.DeserializeObject(json);
foreach(var item in array)
{
Console.WriteLine("{0} {1}", item.temp, item.vcc);
}
Doing this yourself is an awful idea. Use Json.NET. It has already solved the problem better than most programmers could if they were given months on end to work on it. As for your specific needs, parsing into arrays and such, check the documentation, particularly on JsonTextReader. Basically, Json.NET handles JSON arrays natively and will parse them into strings, ints, or whatever the type happens to be without prompting from you. Here is a direct link to the basic code usages for both the reader and the writer, so you can have that open in a spare window while you're learning to work with this.
This is for the best: Be lazy this time and use a library so you solve this common problem forever.
Answer for .NET Core
You can just use the built-in System.Text.Json instead of the 3rd-party Json.NET. To promote reuse, the JSON-file-reading functionality belongs in its own class and should be generic rather than hard-coded to a certain type (Item). Here's a full example:
using System;
using System.IO;
using System.Text.Json;
using System.Threading.Tasks;
namespace Project
{
class Program
{
static async Task Main()
{
Item item = await JsonFileReader.ReadAsync<Item>(#"C:\myFile.json");
}
}
public static class JsonFileReader
{
public static async Task<T> ReadAsync<T>(string filePath)
{
using FileStream stream = File.OpenRead(filePath);
return await JsonSerializer.DeserializeAsync<T>(stream);
}
}
public class Item
{
public int millis;
public string stamp;
public DateTime datetime;
public string light;
public float temp;
public float vcc;
}
}
Or, if you prefer something simpler/synchronous:
class Program
{
static void Main()
{
Item item = JsonFileReader.Read<Item>(#"C:\myFile.json");
}
}
public static class JsonFileReader
{
public static T Read<T>(string filePath)
{
string text = File.ReadAllText(filePath);
return JsonSerializer.Deserialize<T>(text);
}
}
This can also be done in the following way:
JObject data = JObject.Parse(File.ReadAllText(MyFilePath));
string jsonFilePath = #"C:\MyFolder\myFile.json";
string json = File.ReadAllText(jsonFilePath);
Dictionary<string, object> json_Dictionary = (new JavaScriptSerializer()).Deserialize<Dictionary<string, object>>(json);
foreach (var item in json_Dictionary)
{
// parse here
}
Based on #L.B.'s solution, the (typed as Object rather than Anonymous) VB code is
Dim oJson As Object = JsonConvert.DeserializeObject(File.ReadAllText(MyFilePath))
I should mention that this is quick and useful for constructing HTTP call content where the type isn't required. And using Object rather than Anonymous means you can maintain Option Strict On in your Visual Studio environment - I hate turning that off.
For any of the JSON parse, use the website http://json2csharp.com/ (easiest way) to convert your JSON into C# class to deserialize your JSON into C# object.
public class JSONClass
{
public string name { get; set; }
public string url { get; set; }
public bool visibility { get; set; }
public string idField { get; set; }
public bool defaultEvents { get; set; }
public string type { get; set; }
}
Then use the JavaScriptSerializer (from System.Web.Script.Serialization), in case you don't want any third party DLL like newtonsoft.
using (StreamReader r = new StreamReader("jsonfile.json"))
{
string json = r.ReadToEnd();
JavaScriptSerializer jss = new JavaScriptSerializer();
var Items = jss.Deserialize<JSONClass>(json);
}
Then you can get your object with Items.name or Items.Url etc.
Very Easiest way I found on online to work with .JSON file in C#(or any other Programming Language)
Prerequisite:-
Install Newtonsoft.Json Library into your Project
Newtonsoft.Json
and here is the URL -> https://app.quicktype.io/
Steps
1> go to this URL - https://app.quicktype.io/
2> Copy and Paste your JSON file structure into Left sidebar
app.quicktype.io
3> Select required Language (here C#) from Options menu
4> Copy generated code and go to your Project and Create a new .cs file with the same name(here "Welcome.cs")
Welcome.cs
5> Paste all generated code into the newly created class.
Welcome.cs pasted Code
6> that's it. :)
Steps to Access value
1> Go to Main Program .cs file or wherever you need to access it.
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Access Json values using Keys.>");
String jsonString = new StreamReader("give <.json> file Path here").ReadToEnd();
// use below syntax to access JSON file
var jsonFile = Welcome.FromJson(jsonString);
string FileName = jsonFile.File;
long Lvl = jsonFile.Level;
bool isTrue = jsonFile.CSharp;
Console.WriteLine(FileName);//JSON
Console.WriteLine(Lvl);//1
Console.WriteLine(isTrue);//true
}
}
For finding the right path I'm using
var pathToJson = Path.Combine("my","path","config","default.Business.Area.json");
var r = new StreamReader(pathToJson);
var myJson = r.ReadToEnd();
// my/path/config/default.Business.Area.json
[...] do parsing here
Path.Combine uses the Path.PathSeparator and it checks whether the first path has already a separator at the end so it will not duplicate the separators. Additionally, it checks whether the path elements to combine have invalid chars.
See https://stackoverflow.com/a/32071002/4420355
There is a faster way of parsing json then Json.Net . If you are using .net core 3.0 or up then you can use the System.Text.Json nuget package to serialize or deserialize.
you need to add:
using System.Text.Json
And then you can serialize as:
var jsonStr = JsonSerializer.Serialize(model);
And Deserialize as:
var model = JsonSerializer.Deserialize(jsonStr);
This code can help you:
string _filePath = Path.GetDirectoryName(System.AppDomain.CurrentDomain.BaseDirectory);
JObject data = JObject.Parse(_filePath );
There is an easier way to get JSON from file or from the Web:
Json.Net.Curl
Install-Package Json.Net.Curl
// get JObject from local file system
var json = Json.Net.Curl.Get(#"data\JObjectUnitTest1.json");
var json = await Json.Net.Curl.GetAsync(#"data\JObjectUnitTest1.json")
// get JObject from Server
var json = await Json.Net.Curl.GetAsync("http://myserver.com/data.json");
GitHub Project
Nuget
With Cinchoo ETL, an open source library, parsing of very large JSON file is iterative and simple to use
1. Dynamic Method: - No POCO class required
string json = #"
[
{
""millis"": ""1000"",
""stamp"": ""1273010254"",
""datetime"": ""2010/5/4 21:57:34"",
""light"": ""333"",
""temp"": ""78.32"",
""vcc"": ""3.54""
},
{
""millis"": ""2000"",
""stamp"": ""1273010254"",
""datetime"": ""2010/5/4 21:57:34"",
""light"": ""333"",
""temp"": ""78.32"",
""vcc"": ""3.54""
}
]
";
using (var r = ChoJSONReader.LoadText(json))
{
foreach (var rec in r)
Console.WriteLine(rec.Dump());
}
Sample fiddle: https://dotnetfiddle.net/mo1qvw
2. POCO Method:
Define POCO class matching json attributes
public class Item
{
public int Millis { get; set; }
public string Stamp { get; set; }
public DateTime Datetime { get; set; }
public string Light { get; set; }
public float Temp { get; set; }
public float Vcc { get; set; }
}
Then using the parser to load the JSON as below
string json = #"
[
{
""millis"": ""1000"",
""stamp"": ""1273010254"",
""datetime"": ""2010/5/4 21:57:34"",
""light"": ""333"",
""temp"": ""78.32"",
""vcc"": ""3.54""
},
{
""millis"": ""2000"",
""stamp"": ""1273010254"",
""datetime"": ""2010/5/4 21:57:34"",
""light"": ""333"",
""temp"": ""78.32"",
""vcc"": ""3.54""
}
]
";
using (var r = ChoJSONReader<Item>.LoadText(json))
{
foreach (var rec in r)
Console.WriteLine(ChoUtility.Dump(rec));
}
Sample fiddle: https://dotnetfiddle.net/fRWu0w
Disclaimer: I'm author of this library.
Related
I currently have an API which I use dapper to connect to a SQL database to find the file path for documents related to a certain ID. The result is returned in JSON format as follows:
[{"DOC-ID": 1, "DOCUMENT_FULL_PATH": "/PATH/FILENAME.DOC"},{"DOC-ID": 2, "DOCUMENT_FULL_PATH": "/PATH/FILENAME2.DOC"}]
I am trying to get my API to deserialize the JSON data then link that too a model (I prefer to not use models but the only solution I found was using JSON DOM which is briefly discussed on MS website but does not provide an example of how to loop through the JSON array so I could not move forward with this example). When I try to deserialize the dapper query result I get the error indicated below (shown at the line item in the code). I am not sure what is triggering this as I would think the QuerySingle could be deserialized with this method. Once this error is fixed I need to check the files last modified date and save that value to the model which I then again need to serialize to send to the front end! I have spent so much time on this so some help would be much appreciated!
[HttpPost]
public ActionResult MainReviewDocuments([FromForm] string ID)
{
//Using FormData on frontend
//checking ID exists on searching in dashboard
if (ID == null || ID.Length == 0)
{
return Ok(new { Result = "Failed" });
}
else
{
//We have parameters here just in case we want to use them
var UserID = HttpContext.User.FindFirst(ClaimTypes.Name).Value;
String query = "select dbo.A2Q_0132W_RR_IDDocumentation_JSON(#ID) as output";
using (var connection = new SqlConnection(connectionString))
{
var json = connection.QuerySingle<string>(query, new { ID = ID});
MainReviewDocuments? mainreviewdocuments = JsonSerializer.Deserialize<MainReviewDocuments>(json); // this line draws an error 'The JSON value could not be converted to Project.Models.MainReviewDocuments. Path: $ | LineNumber: 0 | BytePositionInLine: 1.'
var rootPath = Path.Combine(Directory.GetParent(env.ContentRootPath).ToString(), "Files");
foreach (var document in mainreviewdocuments)
{
filePath = Path.Combine(rootPath, document.DOCUMENT_FULL_PATH);
//Check file system for each file path and set last modified value to model object LAST_MODIFIED. Struggling with this as well
}
return Ok(mainreviewdocuments); // Can I use Ok() method to convert model back to JSON?
}
}
}
In your original call, you need to de-serialize to a List:
MainReviewDocuments? mainreviewdocuments = JsonSerializer.Deserialize<List<MainReviewDocuments>>(json);
and then access your properties are required.
Using Newtonsoft.Json library:
You can de-serialize your JSON string that you receive from your DB into the following class:
public class MainReviewDocuments
{
[JsonProperty("DOC-ID")]
public int DOCID { get; set; }
public string DOCUMENT_FULL_PATH { get; set; }
}
Or you can use dynamic to de-serialize your JSON:
var mainreviewdocuments = JsonSerializer.Deserialize<dynamic>(json);
and then access the properties as shown in the example below.
You can refer to a working example below:
using System;
using Newtonsoft.Json;
using System.Collections.Generic;
public class Program
{
public static void Main()
{
var myJsonString=#"[{'DOC-ID': 1, 'DOCUMENT_FULL_PATH': '/PATH/FILENAME.DOC'},{'DOC-ID': 2, 'DOCUMENT_FULL_PATH': '/PATH/FILENAME2.DOC'}]";
var mainreviewdocuments =JsonConvert.DeserializeObject<List<MainReviewDocuments>>(myJsonString);
Console.WriteLine("Example using Model: \n");
foreach(var item in mainreviewdocuments)
{
Console.WriteLine(item.DOCID);
Console.WriteLine(item.DOCUMENT_FULL_PATH);
}
Console.WriteLine("\n");
Console.WriteLine("Example using Dynamic: \n");
//Example using dynamic
var mainreviewdocumentsDynamic=JsonConvert.DeserializeObject<dynamic>(myJsonString);
foreach(var item in mainreviewdocumentsDynamic)
{
Console.WriteLine(item["DOC-ID"]);
Console.WriteLine(item["DOCUMENT_FULL_PATH"]);
}
}
}
public class MainReviewDocuments
{
[JsonProperty("DOC-ID")]
public int DOCID { get; set; }
public string DOCUMENT_FULL_PATH { get; set; }
}
Output:
Example using Model:
1
/PATH/FILENAME.DOC
2
/PATH/FILENAME2.DOC
Example using Dynamic:
1
/PATH/FILENAME.DOC
2
/PATH/FILENAME2.DOC
Using System.Text.Json library:
using System;
using System.Collections.Generic;
using System.Text.Json;
using System.Text.Json.Serialization;
public class Program
{
public static void Main()
{
var myJsonString="[{\"DOC-ID\": 1, \"DOCUMENT_FULL_PATH\": \"/PATH/FILENAME.DOC\"},{\"DOC-ID\": 2, \"DOCUMENT_FULL_PATH\": \"/PATH/FILENAME2.DOC\"}]";
var mainreviewdocuments = JsonSerializer.Deserialize<List<MainReviewDocuments>>(myJsonString);
Console.WriteLine("Example using Model: \n");
foreach(var item in mainreviewdocuments)
{
Console.WriteLine(item.DOCID);
Console.WriteLine(item.DOCUMENT_FULL_PATH);
}
Console.WriteLine("\n");
Console.WriteLine("Example using Dynamic: \n");
using (JsonDocument document = JsonDocument.Parse(myJsonString))
{
foreach (JsonElement element in document.RootElement.EnumerateArray())
{
Console.WriteLine(element.GetProperty("DOC-ID"));
Console.WriteLine(element.GetProperty("DOCUMENT_FULL_PATH"));
}
}
}
}
public class MainReviewDocuments
{
[JsonPropertyName("DOC-ID")]
public int DOCID { get; set; }
public string DOCUMENT_FULL_PATH { get; set; }
}
Output:
Example using Model:
1
/PATH/FILENAME.DOC
2
/PATH/FILENAME2.DOC
Example using Dynamic:
1
/PATH/FILENAME.DOC
2
/PATH/FILENAME2.DOC
Working example: https://dotnetfiddle.net/nEjPIK
You can read more on the comparison between the two libraries in this article
I'm currently setting-up my application, and i need to manage a json file (that contain some settings) in my windows form. Once you open it, you can easy choose different settings, and once you've done, you can save it (which mean i need to overwrite the existing one json file settings, and replace it with new one!
I tried to follow this guide for correctly create my json file! But i met 2 problems:
This solution mentioned up, create square brackets (which i don't need!)
Seems to create all settings on one line. Is that correct or it could make some problem in the future?
Some materials....
My application:
Original json file:
Json file generated with my code:
My class:
public class data
{
public bool avx { get; set; }
public bool memory_pool { get; set; }
public bool smt { get; set; }
public bool spectre { get; set; }
public bool unlock_menu { get; set; }
public bool vinput { get; set; }
public double cpu_memory_pool_fraction { get; set; }
public double gpu_memory_pool_fraction { get; set; }
}
My code:
private void btn_save_Click(object sender, EventArgs e)
{
string settings_path = general_path + "\\plugins\\cyber_engine_tweaks\\" + "config.json"; //path
bool avx_set = cb_avx.Checked;
bool smt_set = cb_smt.Checked;
bool memory_set = cb_memory.Checked;
bool spectre_set = cb_spectre.Checked;
bool debug_set = cb_debug.Checked;
bool vinput_set = cb_vinput.Checked;
List<data> _data = new List<data>();
_data.Add(new data()
{
avx = avx_set,
cpu_memory_pool_fraction = 0.5,
gpu_memory_pool_fraction = 1.0,
memory_pool = memory_set,
smt = smt_set,
spectre = spectre_set,
unlock_menu = debug_set,
vinput = vinput_set
});
using (StreamWriter file = File.CreateText(settings_path))
{
JsonSerializer serializer = new JsonSerializer();
//serialize object directly into file stream
serializer.Serialize(file, _data);
}
}
Square brackets are because you send an array:
Instead of
List<data> _data = new List<data>(); _data.Add(new data()...
try
var data = new data()... serializer.Serialize(file, data)
All settings on one line is normal.
Very nice detailed answer here: Can JSON start with "["?
TLDR:
It's not a Json without either {} indicating an object or [] indicating an array. So no, you can't have a json with multiple keys without one.
The newlines are optional in Json. Since most json objects are used for transfering over the wire, there is no need for newlines (which take up unessecary bytes).
Issues:
1 . This solution mentioned up, create square brackets (which i don't need!)
Solution:
Create your data object like:
//List<data> _data = new List<data>();
data _data = new data
{
avx = avx_set,
cpu_memory_pool_fraction = 0.5,
gpu_memory_pool_fraction = 1.0,
memory_pool = memory_set,
smt = smt_set,
spectre = spectre_set,
unlock_menu = debug_set,
vinput = vinput_set
};
2 . Seems to create all settings on one line. Is that correct or it could make some problem in the future?
Solution:
I think it's a format issue. Can igonore
I have several text files with the following data structure:
{
huge
json
block that spans across multiple lines
}
--#newjson#--
{
huge
json
block that spans across multiple lines
}
--#newjson#--
{
huge
json
block that spans across multiple lines
} etc....
So it is actually json blocks that are row delimited by "--##newjson##--" string .
I am trying to write a customer extractor to parse this. The problem is that I can't use string data type to feed json deserializer because it has a maximum size of 128 KB and the json blocks do not fit in this. What is the best approach to parse this file using a custom extractor?
I have tried using the code below, but it doesn't work. Even the row delimiter "--#newjson#--" doesn't seem to work right.
public SampleExtractor(Encoding encoding, string row_delim = "--#newjson#--", char col_delim = ';')
{
this._encoding = ((encoding == null) ? Encoding.UTF8 : encoding);
this._row_delim = this._encoding.GetBytes(row_delim);
this._col_delim = col_delim;
}
public override IEnumerable<IRow> Extract(IUnstructuredReader input, IUpdatableRow output)
{
//Read the input by json
foreach (Stream current in input.Split(_encoding.GetBytes("--#newjson#--")))
{
var serializer = new JsonSerializer();
using (var sr = new StreamReader(current))
using (var jsonTextReader = new JsonTextReader(sr))
{
var jsonrow = serializer.Deserialize<JsonRow>(jsonTextReader);
output.Set(0, jsonrow.status.timestamp);
}
yield return output.AsReadOnly();
}
}
You dont need a custom extractor to do that.
The best solution is add one json by line. Then you can use a text extractor and extract line by line. You can also pick your own delimiter.
REFERENCE ASSEMBLY [Newtonsoft.Json];
REFERENCE ASSEMBLY [Microsoft.Analytics.Samples.Formats];
#JsonLines=
EXTRACT
[JsonLine] string
FROM
#Full_Path
USING
Extractors.Text(delimiter:'\b', quoting : false);
#ParsedJSONLines =
SELECT
Microsoft.Analytics.Samples.Formats.Json.JsonFunctions.JsonTuple([JsonLine]) AS JSONLine
FROM
#JsonLines
#AccessToProperties=
SELECT
JSONLine["Property"] AS Property
FROM
#ParsedJSONLines;
Here is how you can achieve the solution:
1) Create a c# equivalent of your JSON object
Note:- Assuming all your json object are same in your text file.
E.g:
Json Code
{
"id": 1,
"value": "hello",
"another_value": "world",
"value_obj": {
"name": "obj1"
},
"value_list": [
1,
2,
3
]
}
C# Equivalent
public class ValueObj
{
public string name { get; set; }
}
public class RootObject
{
public int id { get; set; }
public string value { get; set; }
public string another_value { get; set; }
public ValueObj value_obj { get; set; }
public List<int> value_list { get; set; }
}
2) Change your de-serializing code like below after you have done the split based on the delimiter
using (JsonReader reader = new JsonTextReader(sr))
{
while (!sr.EndOfStream)
{
o = serializer.Deserialize<List<MyObject>>(reader);
}
}
This would deserialize the json data in c# class object which would solve your purpose.
Later which you can serialize again or print it in text or ...any file.
Hope it helps.
Given below is the type of JSON response ,
{
"?xml":{
"#version":"1.0",
"#encoding":"iso-8859-1"
},
"xmlreport":{
"#title":"ABC: TEST Most Saved2",
"#dates":"Week of May 19,2013",
"columns":{
"column":[
{
"#name":"Page",
"#type":"dimension",
"#text":"Page"
},
{
"#name":"Events",
"#type":"metric",
"#hastotals":"true",
"#text":"Events"
}
]
},
"rows":{
"row":[
{
"#rownum":"1",
"cell":[
{
"#columnname":"page",
"#csv":"\"http://www.ABC.com/profile/recipebox\"",
"#text":"http://www.ABC.com/profile/recipebox"
},
{
"#columnname":"events",
"#percentage":"\"0.1%\"",
"#text":"489"
}
]
},
{
"#rownum":"2",
"cell":[
{
"#columnname":"page",
"#csv":"\"http://www.ABC.com/recipes/peanut-butter-truffle-brownies/c5c602e4-007b-43e0-aaab-2f9aed89524c\"",
"#text":"http://www.ABC.com/recip...c602e4-007b-43e0-aaab-2f9aed89524c"
},
{
"#columnname":"events",
"#percentage":"\"0.0%\"",
"#text":"380"
}
]
}
]
},
"totals":{
"pagetotals":{
"total":{
"#columnname":"events",
"#value":"1820.000000",
"#text":"1,820 (0.2%)"
}
},
"reporttotals":{
"total":{
"#columnname":"events",
"#value":"7838.000000",
"#text":"7,838 (0.8%)"
}
},
"timeperiodtotals":{
"total":{
"#columnname":"events",
"#value":"955774.000000",
"#text":"955,774 (100.0%)"
}
}
}
}
}
I am unable to parse the object.Could you please help me out how do I read the attributes and elements after parsing. I am using C#
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(XML);
string jsonText = JsonConvert.SerializeXmlNode(doc);
//var result = Newtonsoft.Json.JsonConvert.DeserializeXmlNode(jsonText, "xmlreport");
var results = JsonConvert.DeserializeObject<dynamic>(jsonText);
JToken token = JObject.Parse(jsonText);
var report = token["xmlreport"];
}
My understanding of the question is you've got some Xml and you need to send out json. Couple of points before we get to the code:
1) Don't convert xml to json directly as it causes issues
2) Parse the xml to objects at your end and then work out the format to return; decoupling what comes in and goes out will allow for one of the interfaces to change in the future without impacting the other as you can tweak the mapping
So, onto the code ...
Essentially parse the xml to objects to allow for further processing and then push out as json.
class Program
{
private static string starting =
"<xmlreport title=\"ABC: TEST Most Saved2\" dates=\"Week of May 19,2013\"><columns><column name=\"Page\" type=\"dimension\">Page</column><column name=\"Events\" type=\"metric\" hastotals=\"true\">Events</column></columns><rows><row rownum=\"1\"><cell columnname=\"page\" csv=\"http://www.ABC.com/profile/recipebox\">http://www.ABC.com/profile/recipebox</cell><cell columnname=\"events\" percentage=\"0.1%\">489</cell></row><row rownum=\"2\"><cell columnname=\"page\" csv=\"http://www.ABC.com/recipes/peanut-butter-truffle-brownies/c5c602e4-007b-43e0-aaab-2f9aed89524c\">http://www.ABC.com/recipes/peanut-butter-truffle-brownies/c5c602e4-007b-43e0-aaab-2f9aed89524c</cell><cell columnname=\"events\" percentage=\"0.0%\">380</cell></row></rows><totals><pagetotals><total columnname=\"events\" value=\"1820.00000\">1,820 (0.2%)</total></pagetotals><reporttotals><total columnname=\"events\" value=\"7838.000000\">7,838 (0.8%)</total></reporttotals><timeperiodtotals><total columnname=\"events\" value=\"955774.000000\">955,774 (100.0%)</total></timeperiodtotals></totals></xmlreport>";
static void Main(string[] args)
{
// parse from xml to objects
StringReader reader = new StringReader(starting);
XmlSerializer xmlSerializer = new XmlSerializer(typeof(XmlReport));
var xmlreport = (XmlReport)xmlSerializer.Deserialize(reader);
// todo: do some process mapping ...
// parse out as json
var json = JsonConvert.SerializeObject(xmlreport);
Console.WriteLine(json);
Console.ReadLine();
}
}
[Serializable]
[XmlRoot(ElementName = "xmlreport")]
public class XmlReport
{
[XmlAttribute(AttributeName = "title")]
public string Title { get; set; }
[XmlAttribute(AttributeName = "dates")]
public string Dates { get; set; }
[XmlArray(ElementName = "columns")]
[XmlArrayItem(typeof(Column), ElementName = "column")]
public Collection<Column> Columns { get; set; }
}
[Serializable]
public class Column
{
[XmlAttribute(AttributeName = "name")]
public string Name { get; set; }
[XmlAttribute(AttributeName = "type")]
public string Type { get; set; }
}
I've tried to parse the json to the original xml to begin with so appologies if I've not interpreted it properly. I've not done the entire structure but I hope the example above gives you an idea of how to do the rest.
Hope this helps.
One way of doing this is by getting the actual Data Structure of that JSON object that you have there.
Then create classes representing that data structure (if you can get a complete response -- having all properties, you just use this site to convert that to classes).
After that, deserialize that JSON object into your class using different libraries available. A sample could be this one.
Use this (JSon.NET) and a recursive function writes all keys and values to output window.
[TestMethod]
public void ParseMePlease()
{
string s = #"{""?xml"":{""#version"":""1.0"",""#encoding"":""iso-8859-1""},
""xmlreport"":{""#title"":""ABC: TEST Most Saved2"",""#dates"":""Week of May 19,2013"",
""columns"":{""column"":[{""#name"":""Page"",""#type"":""dimension"",""#text"":""Page""},{""#name"":""Events"",""#type"":""metric"",""#hastotals"":""true"",""#text"":""Events""}]},
""rows"":
{""row"":[{""#rownum"":""1"",""cell"":[{""#columnname"":""page"",""#csv"":""\""http://www.ABC.com/profile/recipebox\"""",""#text"":""http://www.ABC.com/profile/recipebox""},{""#columnname"":""events"",""#percentage"":""\""0.1%\"""",""#text"":""489""}]},
{""#rownum"":""2"",""cell"":[{""#columnname"":""page"",""#csv"":""\""http://www.ABC.com/recipes/peanut-butter-truffle-brownies/c5c602e4-007b-43e0-aaab-2f9aed89524c\"""",""#text"":""http://www.ABC.com/recip...c602e4-007b-43e0-aaab-2f9aed89524c""},{""#columnname"":""events"",""#percentage"":""\""0.0%\"""",""#text"":""380""}]}]},
""totals"":{""pagetotals"":{""total"":{""#columnname"":""events"",""#value"":""1820.000000"",""#text"":""1,820 (0.2%)""}},
""reporttotals"":{""total"":{""#columnname"":""events"",""#value"":""7838.000000"",""#text"":""7,838 (0.8%)""}},
""timeperiodtotals"":{""total"":{""#columnname"":""events"",""#value"":""955774.000000"",""#text"":""955,774 (100.0%)""}}}}}";
var result=JsonConvert.DeserializeObject<object>(s);
Debug.WriteLine("Right Click Result on quick watch for Result Views!(On Debug)"+result.ToString() );
JObject jobject = ((Newtonsoft.Json.Linq.JObject)result);
PrintDetail(jobject);
}
public void PrintDetail(JObject node)
{
foreach (var item in node)
{
Debug.WriteLine("Key:" + item.Key + " Value:" + item.Value);
if (item.Value is JObject)
{
PrintDetail((JObject)item.Value);
}
}
}
I'm trying to deserialize a Facebook friend's Graph API call into a list of objects. The JSON object looks like:
{"data":[{"id":"518523721","name":"ftyft"},
{"id":"527032438","name":"ftyftyf"},
{"id":"527572047","name":"ftgft"},
{"id":"531141884","name":"ftftft"},
{"id":"532652067","name"...
List<EFacebook> facebooks = new JavaScriptSerializer().Deserialize<List<EFacebook>>(result);
It's not working, because the primitive object is invalid. How can I deserialize this?
You need to create a structure like this:
public class Friends
{
public List<FacebookFriend> data {get; set;}
}
public class FacebookFriend
{
public string id {get; set;}
public string name {get; set;}
}
Then you should be able to do:
Friends facebookFriends = new JavaScriptSerializer().Deserialize<Friends>(result);
The names of my classes are just an example. You should use proper names.
Adding a sample test:
string json =
#"{""data"":[{""id"":""518523721"",""name"":""ftyft""}, {""id"":""527032438"",""name"":""ftyftyf""}, {""id"":""527572047"",""name"":""ftgft""}, {""id"":""531141884"",""name"":""ftftft""}]}";
Friends facebookFriends = new System.Web.Script.Serialization.JavaScriptSerializer().Deserialize<Friends>(json);
foreach(var item in facebookFriends.data)
{
Console.WriteLine("id: {0}, name: {1}", item.id, item.name);
}
Produces:
id: 518523721, name: ftyft
id: 527032438, name: ftyftyf
id: 527572047, name: ftgft
id: 531141884, name: ftftft
Sometimes I prefer dynamic objects:
public JsonResult GetJson()
{
string res;
WebClient client = new WebClient();
// Download string
string value = client.DownloadString("https://api.instagram.com/v1/users/000000000/media/recent/?client_id=clientId");
// Write values
res = value;
dynamic dyn = JsonConvert.DeserializeObject(res);
var lstInstagramObjects = new List<InstagramModel>();
foreach(var obj in dyn.data)
{
lstInstagramObjects.Add(new InstagramModel()
{
Link = (obj.link != null) ? obj.link.ToString() : "",
VideoUrl = (obj.videos != null) ? obj.videos.standard_resolution.url.ToString() : "",
CommentsCount = int.Parse(obj.comments.count.ToString()),
LikesCount = int.Parse(obj.likes.count.ToString()),
CreatedTime = new System.DateTime(1970, 1, 1, 0, 0, 0, 0).AddSeconds((double.Parse(obj.created_time.ToString()))),
ImageUrl = (obj.images != null) ? obj.images.standard_resolution.url.ToString() : "",
User = new InstagramModel.UserAccount()
{
username = obj.user.username,
website = obj.user.website,
profile_picture = obj.user.profile_picture,
full_name = obj.user.full_name,
bio = obj.user.bio,
id = obj.user.id
}
});
}
return Json(lstInstagramObjects, JsonRequestBehavior.AllowGet);
}
A great way to automatically generate these classes for you is to copy your JSON output and throw it in here:
http://json2csharp.com/
It will provide you with a starting point to touch up your classes for deserialization.
Very easily we can parse JSON content with the help of dictionary and JavaScriptSerializer. Here is the sample code by which I parse JSON content from an ashx file.
var jss = new JavaScriptSerializer();
string json = new StreamReader(context.Request.InputStream).ReadToEnd();
Dictionary<string, string> sData = jss.Deserialize<Dictionary<string, string>>(json);
string _Name = sData["Name"].ToString();
string _Subject = sData["Subject"].ToString();
string _Email = sData["Email"].ToString();
string _Details = sData["Details"].ToString();
Newtonsoft.JSON is a good solution for these kind of situations. Also Newtonsof.JSON is faster than others, such as JavaScriptSerializer, DataContractJsonSerializer.
In this sample, you can the following:
var jsonData = JObject.Parse("your JSON data here");
Then you can cast jsonData to JArray, and you can use a for loop to get data at each iteration.
Also, I want to add something:
for (int i = 0; (JArray)jsonData["data"].Count; i++)
{
var data = jsonData[i - 1];
}
Working with dynamic object and using Newtonsoft serialize is a good choice.
I agree with Icarus (would have commented if I could),
but instead of using a CustomObject class,
I would use a Dictionary (in case Facebook adds something).
private class MyFacebookClass
{
public IList<IDictionary<string, string>> data { get; set; }
}
or
private class MyFacebookClass
{
public IList<IDictionary<string, object>> data { get; set; }
}
Serialization:
// Convert an object to JSON string format
string jsonData = JsonConvert.SerializeObject(obj);
Response.Write(jsonData);
Deserialization::
To deserialize a dynamic object
string json = #"{
'Name': 'name',
'Description': 'des'
}";
var res = JsonConvert.DeserializeObject< dynamic>(json);
Response.Write(res.Name);
If you're using .NET Core 3.0, you can use System.Text.Json (which is now built-in) to deserialize JSON.
The first step is to create classes to model the JSON. There are many tools which can help with this, and some of the answers here list them.
Some options are http://json2csharp.com, http://app.quicktype.io, or use Visual Studio (menu Edit → Paste Special → Paste JSON as classes).
public class Person
{
public string Id { get; set; }
public string Name { get; set; }
}
public class Response
{
public List<Person> Data { get; set; }
}
Then you can deserialize using:
var people = JsonSerializer.Deserialize<Response>(json);
If you need to add settings, such as camelCase handling, then pass serializer settings into the deserializer like this:
var options = new JsonSerializerOptions() { PropertyNamingPolicy = JsonNamingPolicy.CamelCase };
var person = JsonSerializer.Deserialize<Response>(json, options);
You can use this extensions
public static class JsonExtensions
{
public static T ToObject<T>(this string jsonText)
{
return JsonConvert.DeserializeObject<T>(jsonText);
}
public static string ToJson<T>(this T obj)
{
return JsonConvert.SerializeObject(obj);
}
}
Here is another site that will help you with all the code you need as long as you have a correctly formated JSON string available:
https://app.quicktype.io/