For some of my unit tests I want the ability to build up particular JSON values (record albums in this case) that can be used as input for the system under test.
I have the following code:
var jsonObject = new JObject();
jsonObject.Add("Date", DateTime.Now);
jsonObject.Add("Album", "Me Against The World");
jsonObject.Add("Year", 1995);
jsonObject.Add("Artist", "2Pac");
This works fine, but I have never really like the "magic string" syntax and would prefer something closer to the expando-property syntax in JavaScript like this:
jsonObject.Date = DateTime.Now;
jsonObject.Album = "Me Against The World";
jsonObject.Year = 1995;
jsonObject.Artist = "2Pac";
Well, how about:
dynamic jsonObject = new JObject();
jsonObject.Date = DateTime.Now;
jsonObject.Album = "Me Against the world";
jsonObject.Year = 1995;
jsonObject.Artist = "2Pac";
You can use the JObject.Parse operation and simply supply single quote delimited JSON text.
JObject o = JObject.Parse(#"{
'CPU': 'Intel',
'Drives': [
'DVD read/writer',
'500 gigabyte hard drive'
]
}");
This has the nice benefit of actually being JSON and so it reads as JSON.
Or you have test data that is dynamic you can use JObject.FromObject operation and supply a inline object.
JObject o = JObject.FromObject(new
{
channel = new
{
title = "James Newton-King",
link = "http://james.newtonking.com",
description = "James Newton-King's blog.",
item =
from p in posts
orderby p.Title
select new
{
title = p.Title,
description = p.Description,
link = p.Link,
category = p.Categories
}
}
});
Json.net documentation for serialization
Neither dynamic, nor JObject.FromObject solution works when you have JSON properties that are not valid C# variable names e.g. "#odata.etag". I prefer the indexer initializer syntax in my test cases:
JObject jsonObject = new JObject
{
["Date"] = DateTime.Now,
["Album"] = "Me Against The World",
["Year"] = 1995,
["Artist"] = "2Pac"
};
Having separate set of enclosing symbols for initializing JObject and for adding properties to it makes the index initializers more readable than classic object initializers, especially in case of compound JSON objects as below:
JObject jsonObject = new JObject
{
["Date"] = DateTime.Now,
["Album"] = "Me Against The World",
["Year"] = 1995,
["Artist"] = new JObject
{
["Name"] = "2Pac",
["Age"] = 28
}
};
With object initializer syntax, the above initialization would be:
JObject jsonObject = new JObject
{
{ "Date", DateTime.Now },
{ "Album", "Me Against The World" },
{ "Year", 1995 },
{ "Artist", new JObject
{
{ "Name", "2Pac" },
{ "Age", 28 }
}
}
};
There are some environment where you cannot use dynamic (e.g. Xamarin.iOS) or cases in where you just look for an alternative to the previous valid answers.
In these cases you can do:
using Newtonsoft.Json.Linq;
JObject jsonObject =
new JObject(
new JProperty("Date", DateTime.Now),
new JProperty("Album", "Me Against The World"),
new JProperty("Year", "James 2Pac-King's blog."),
new JProperty("Artist", "2Pac")
)
More documentation here:
http://www.newtonsoft.com/json/help/html/CreatingLINQtoJSON.htm
Sooner or later you will have property with a special character. e.g. Create-Date. The hyphen won't be allowed in property name. This will break your code. In such scenario, You can either use index or combination of index and property.
dynamic jsonObject = new JObject();
jsonObject["Create-Date"] = DateTime.Now; //<-Index use
jsonObject.Album = "Me Against the world"; //<- Property use
jsonObject["Create-Year"] = 1995; //<-Index use
jsonObject.Artist = "2Pac"; //<-Property use
Simple way of creating newtonsoft JObject from Properties.
This is a Sample User Properties
public class User
{
public string Name;
public string MobileNo;
public string Address;
}
and i want this property in newtonsoft JObject is:
JObject obj = JObject.FromObject(new User()
{
Name = "Manjunath",
MobileNo = "9876543210",
Address = "Mumbai, Maharashtra, India",
});
Output will be like this:
{"Name":"Manjunath","MobileNo":"9876543210","Address":"Mumbai, Maharashtra, India"}
May I suggest using the nameof expression combined with a model for the structure you're trying to build?
Example:
record RecordAlbum(string Album, string Artist, int Year);
var jsonObject = new JObject
{
{ nameof(RecordAlbum.Album), "Me Against The World" },
{ nameof(RecordAlbum.Artist), "2Pac" },
{ nameof(RecordAlbum.Year), 1995 }
};
As an added benefit to removing the "magic string" aspect - this also will give you a little bit of refactor-ability. You can easily rename any given property name for the record and it should update the value returned by the nameof() expression.
You can use Newtonsoft library and use it as follows
using Newtonsoft.Json;
public class jb
{
public DateTime Date { set; get; }
public string Artist { set; get; }
public int Year { set; get; }
public string album { set; get; }
}
var jsonObject = new jb();
jsonObject.Date = DateTime.Now;
jsonObject.Album = "Me Against The World";
jsonObject.Year = 1995;
jsonObject.Artist = "2Pac";
System.Web.Script.Serialization.JavaScriptSerializer oSerializer =
new System.Web.Script.Serialization.JavaScriptSerializer();
string sJSON = oSerializer.Serialize(jsonObject );
Trying to get address and its value to be curly brackets. means json object within a json object.
var jsonObject = new JObject();
dynamic j_obj = new JObject();
j_obj.jsonrpc = "1.0";
j_obj.id = "abc";
j_obj.method = "getrawtransaction";
j_obj.#params = new JArray() as dynamic;
dynamic info = new JObject();
info.txid = "myid";
info.vout = "0";
j_obj.#params.Add(info);
var address = "myaddress";
j_obj.Add(new JProperty(address, "0.01"));
Console.WriteLine(j_obj.ToString());
What I want is "address" and its value to be json object.
This is the output I am getting now.
Output Image
You are adding a value property here
var address = "myaddress";
j_obj.Add(new JProperty(address, "0.01"));
Instead create an object for the address then use that in the property:
dynamic addressItem = new JObject();
addressItem.line1 = "foo";
var address = "myaddress";
j_obj.Add(new JProperty(address, addressItem));
Alternatively, as you have gone down the dynamics route you could do this
j_obj.myaddress = new
{
line1 = "foo"
}
Either of these would create JSON that looks like this:
{
...
"myaddress": { "line1": "foo" }
...
}
I need for AWS SNS the correct formatted JSON object but my format is wrong.
dynamic foo = new ExpandoObject();
foo.GCM = new ExpandoObject {};
foo.GCM.data = new ExpandoObject();
foo.GCM.data.message = "bogus";
string json = Newtonsoft.Json.JsonConvert.SerializeObject(foo,Newtonsoft.Json.Formatting.None);
The result:
{"GCM":{"data":{"message":"bogus"}}}
Required format: {"GCM":"{\"data\":{\"message\":\"bogus\"}}"}
dynamic foo = new ExpandoObject();
foo.data = new ExpandoObject();
foo.data.message = "bogus";
string json1 = JsonConvert.SerializeObject(foo, Newtonsoft.Json.Formatting.None);
var json = JsonConvert.SerializeObject(new { GCM=json1 } , Newtonsoft.Json.Formatting.None);
OUTPUT: {"GCM":"{\"data\":{\"message\":\"bogus\"}}"}
But I don't understand why this Required format needs double serialization. Are you sure about it?
I have got following scenario where i have a array of strings and i need to pass this data as json object.
How can I convert array of string to json object using DataContractJsonSerializer.
code is :
string[] request = new String[2];
string[1] = "Name";
string[2] = "Occupaonti";
I would recommend using the Newtonsoft.Json NuGet package, as it makes handling JSON trivial. You could do the following:
var request = new String[2];
request[0] = "Name";
request[1] = "Occupaonti";
var json = JsonConvert.SerializeObject(request);
Which would produce:
["Name","Occupaonti"]
Notice that in your post you originally were trying to index into the string type, and also would have received an IndexOutOfBounds exception since indexing is zero-based. I assume you will need values assigned to the Name and Occupancy, so I would change this slightly:
var name = "Pooja Kuntal";
var occupancy = "Software Engineer";
var person = new
{
Name = name,
Occupancy = occupancy
};
var json = JsonConvert.SerializeObject(person);
Which would produce:
{
"Name": "Pooja Kuntal",
"Occupancy": "Software Engineer"
}
Here's a simple class that should do the job. I took the liberty of using Newtonsoft.Json instead of DataContractJsonSerializer.
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string[] request = new String[2];
request[0] = "Name";
request[1] = "Occupaonti";
string json = JsonConvert.SerializeObject(request);
}
}
}
I often need to extend my Domain model with additional info before returning it to the client with WebAPI. To avoid creation of ViewModel I thought I could return JObject with additional properties. I could not however find direct way to convert object of any type to JObject with single call to Newtonsoft JSON library. I came up with something like this:
first SerializeObject
then Parse
and extend JObject
Eg.:
var cycles = cycleSource.AllCycles();
var settings = new JsonSerializerSettings
{
ContractResolver = new CamelCasePropertyNamesContractResolver()
};
var vm = new JArray();
foreach (var cycle in cycles)
{
var cycleJson = JObject.Parse(JsonConvert.SerializeObject(cycle, settings));
// extend cycleJson ......
vm.Add(cycleJson);
}
return vm;
I this correct way ?
JObject implements IDictionary, so you can use it that way. For ex,
var cycleJson = JObject.Parse(#"{""name"":""john""}");
//add surname
cycleJson["surname"] = "doe";
//add a complex object
cycleJson["complexObj"] = JObject.FromObject(new { id = 1, name = "test" });
So the final json will be
{
"name": "john",
"surname": "doe",
"complexObj": {
"id": 1,
"name": "test"
}
}
You can also use dynamic keyword
dynamic cycleJson = JObject.Parse(#"{""name"":""john""}");
cycleJson.surname = "doe";
cycleJson.complexObj = JObject.FromObject(new { id = 1, name = "test" });
If you have an object and wish to become JObject you can use:
JObject o = (JObject)JToken.FromObject(miObjetoEspecial);
like this :
Pocion pocionDeVida = new Pocion{
tipo = "vida",
duracion = 32,
};
JObject o = (JObject)JToken.FromObject(pocionDeVida);
Console.WriteLine(o.ToString());
// {"tipo": "vida", "duracion": 32,}
This will work:
var cycles = cycleSource.AllCycles();
var settings = new JsonSerializerSettings
{
ContractResolver = new CamelCasePropertyNamesContractResolver()
};
var vm = new JArray();
foreach (var cycle in cycles)
{
var cycleJson = JObject.FromObject(cycle);
// extend cycleJson ......
vm.Add(cycleJson);
}
return vm;
JObject.FromObject(obj);
Documentation here