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Equivalent of JArray.FromObject() in .Net5?

We have a project which using System.Text.Json in .NET 5 instead of Newtonsoft JObject. Using Newtonsoft, it is pretty easy to replace dynamic JSON data e.g. as shown below:
siteDataObject["student"] = JArray.FromObject(studentservice.GetStudents());
When studentservice.GetStudents() is return List as below structure
internal class Student {
public int Id { get; set; }
public string Name { get; set; }
public string ContactPhone { get; set; }
public IEnumerable<MedicalRecord> MedicalRecords { get; set; }
}
internal class MedicalRecord {
public int Id { get; set; }
public string Name { get; set; }
public DateTime RecordDate { get; set; }
public IEnumerable<DiseaseLog> DiseaseLogs{ get; set; }
}
internal class DiseaseLog {
public int Id { get; set; }
public string Name { get; set; }
public DateTime LogDate { get; set; }
}
but in System.Text.Json
foreach (var element in doc.RootElement.EnumerateObject()) {
if (element.Name == "student") {
writer.WritePropertyName(element.Name);
}
else {
element.WriteTo(writer);
}
}
I don't know how to convert List<student> into JSON array data, when student class have many properties with multi collection inside.
Can anyone advise how to convert it ?
To clarify, I need to propose the full code for this, I have a dynamic json string and want to replace element : students into new record, the code will be
var dynamicJson = #"{'roomid':1,'roomcode':'Code001','students':[1],'contentdata':'say hello','footerdata':'cookie policy'}";
using MemoryStream stream = new MemoryStream();
using Utf8JsonWriter writer = new Utf8JsonWriter(stream);
using var dynamicDocument = JsonDocument.Parse(dynamicJson);
writer.WriteStartObject();
foreach (var element in dynamicDocument.RootElement.EnumerateObject())
{
if (element.Name == "students")
{
// unknown how to modify the student record into array
}
else
element.WriteTo(writer);
}
writer.WriteEndObject();
stream.Flush();
var modifyJson = Encoding.UTF8.GetString(stream.ToArray());
I know how to modify student value , if student element is string, but I don't know how to modify it into array, by using simple code. As student have multi class inside.
My expected result should be
{
"roomid": 1,
"roomcode": "Code001",
"students": [
{
"id": 1,
"Name": "Wilson",
"ContactPhone": "123-122-3311",
"MedicalRecords": [
{
"id": 101,
"Name ": "Medial record 101011",
"RecordDate": "2021-12-31",
"DiseaseLogs": [
{
"id": 18211,
"Name ": "Patient Log 19292",
"LogDate": "2020-1-31"
},
{
"id": 18212,
"Name ": "Patient Log 2911w",
"LogDate": "2020-3-31"
}
]
}
]
}
],
"contentdata": "say hello",
"footerdata": "cookie policy"
}

In .NET 5 there is no modifiable JSON Document Object Model built into to System.Text.Json. JsonDocument is read-only, and System.Text.Json.Nodes was only introduced in .NET 6. Thus, the easiest way to deserialize, modify and re-serialize free-form JSON in .NET 5 is to deserialize to some partial data model, with unknown values bound into a dictionary.
If you do not care about the order of properties at the root level, you could deserialize to a model with a public object students { get; set; } property, and bind the remaining elements to a JsonExtensionData overflow dictionary:
public class RootObject
{
public object students { get; set; }
[System.Text.Json.Serialization.JsonExtensionDataAttribute]
public IDictionary<string, object> ExtensionData { get; set; }
}
Then deserialize, modify and re-serialize as follows:
var students = new List<Student> { /* Initialize these as required... */ };
var dynamicJson = #"{""roomid"":1,""roomcode"":""Code001"",""students"":[1],""contentdata"":""say hello"",""footerdata"":""cookie policy""}";
var root = JsonSerializer.Deserialize<RootObject>(dynamicJson);
root.students = students;
var modifyJson = JsonSerializer.Serialize(root, new JsonSerializerOptions { PropertyNamingPolicy = JsonNamingPolicy.CamelCase, WriteIndented = true });
Which results in
{
"students": [
{
"id": 1,
"name": "Wilson",
"contactPhone": "123-122-3311",
"medicalRecords": [
{
"id": 101,
"name": "Medial record 101011",
"recordDate": "2021-12-31T00:00:00",
"diseaseLogs": [
{
"id": 18211,
"name": "Patient Log 19292",
"logDate": "2020-01-31T00:00:00"
},
{
"id": 18212,
"name": "Patient Log 2911w",
"logDate": "2020-03-31T00:00:00"
}
]
}
]
}
],
"roomid": 1,
"roomcode": "Code001",
"contentdata": "say hello",
"footerdata": "cookie policy"
}
the students property must be declared as object because the input JSON already has an array containing a single integer value; declaring it as public List<Student> students { get; set; } would result in a deserialization when initially loading the JSON.
Demo fiddle #1 here.
If you do care about the order of properties at the root level, you could deserialize to an OrderedDictionary (an old order-preserving non-generic dictionary dating from .NET Framework 2.0 which is still around and supported), overwrite the "students" value, and re-serialize:
var students = new List<Student> { /* Initialize these as required... */ };
var dynamicJson = #"{""roomid"":1,""roomcode"":""Code001"",""students"":[1],""contentdata"":""say hello"",""footerdata"":""cookie policy""}";
var root = JsonSerializer.Deserialize<OrderedDictionary>(dynamicJson);
root["students"] = students;
var modifyJson = JsonSerializer.Serialize(root, new JsonSerializerOptions { PropertyNamingPolicy = JsonNamingPolicy.CamelCase, WriteIndented = true });
Which results in
{
"roomid": 1,
"roomcode": "Code001",
"students": [
{
"id": 1,
"name": "Wilson",
"contactPhone": "123-122-3311",
"medicalRecords": [
{
"id": 101,
"name": "Medial record 101011",
"recordDate": "2021-12-31T00:00:00",
"diseaseLogs": [
{
"id": 18211,
"name": "Patient Log 19292",
"logDate": "2020-01-31T00:00:00"
},
{
"id": 18212,
"name": "Patient Log 2911w",
"logDate": "2020-03-31T00:00:00"
}
]
}
]
}
],
"contentdata": "say hello",
"footerdata": "cookie policy"
}
Demo fiddle #2 here.
In .NET 6 this all becomes easier through use of the System.Text.Json.Nodes editable JSON Document Object Model:
var dynamicJson = #"{""roomid"":1,""roomcode"":""Code001"",""students"":[1],""contentdata"":""say hello"",""footerdata"":""cookie policy""}";
var nodes = JsonSerializer.Deserialize<JsonObject>(dynamicJson);
nodes["students"] = JsonSerializer.SerializeToNode(students, new JsonSerializerOptions { PropertyNamingPolicy = JsonNamingPolicy.CamelCase });
var modifyJson = nodes.ToString();
But in .NET 5 this is not possible. Demo fiddle #3 here.

I think this is what you want (array or single nested object):
var student = new Student()
{
Name = "Student",
ContactPhone = "contact",
Id = 1,
MedicalRecords = new List<MedicalRecord>()
{
new MedicalRecord()
{
Name = "Medical Record 1",
RecordDate= DateTime.Now ,
Id = 1 ,
MedicalRecords = new List<DiseaseLog>()
{
new DiseaseLog(){ Name = "some disease" ,
LogDate = DateTime.Now, Id =1 }
}
}
}
};
var data = System.Text.Json.JsonSerializer.Serialize(student);
Console.WriteLine(data);
var list = new List<Student>();
list.Add(student);
var arrayData = System.Text.Json.JsonSerializer.Serialize(list);
Console.WriteLine(arrayData);

Serialize JSON to JSON Array (Nested JSON) for POST Request C#

This is what I'm trying to achieve. I'm trying to serialize my model into a JSON for post request to insert records
{
"Data": [
{
"employee_num": "7812345",
"code": "333",
"startdate": "2020-10-03"
},
{
"employee_num": "2345789",
"code": "444",
"startdate": "2020-10-03"
}
]
}
I'm stuck with this
{
"employee_num": "7812345",
"code": "333",
"startdate": "2020-10-03"
},
{
"employee_num": "2345789",
"code": "444",
"startdate": "2020-10-03"
}
Here is my code
var options = new JsonSerializerOptions
{
WriteIndented = false
};
var jsonString = JsonSerializer.Serialize(Model, options);
Newbie here

I used the Json Conerter from newtonsoft and got it the format you want.
Test t = new Test("Max", "Musterallee", "Mustermann#Muster.de");
Test t1 = new Test("Max2", "Musterallee2", "Mustermann2#Muster.de");
Test2 t2 = new Test2();
t2.addUser(t);
t2.addUser(t1);
var output = JsonConvert.SerializeObject(t2);
Console.WriteLine(output);
Test:
class Test
{
public string name { get; set; }
public string adress { get; set; }
public string email { get; set; }
public Test(string name, string adress, string email)
{
this.name = name;
this.adress = adress;
this.email = email;
}
}
Test2:
class Test2
{
public List<Test> Data;
public Test2()
{
Data = new List<Test>();
}
public void addUser (Test t1)
{
Data.Add(t1);
}
}
And the output looked like this:
{
"Data": [
{
"name": "Max",
"adress": "Musterallee",
"email": "Mustermann#Muster.de"
},
{
"name": "Max2",
"adress": "Musterallee2",
"email": "Mustermann2#Muster.de"
}
]
}

Well, Technically, your json suggests you should have a model like this:
public partial class SomeClass // You can choose some better class names.
{
[JsonProperty("Data")]
public List<Datum> Data { get; set; }
public SomeClass()
{
Data = new List<Datum>();
}
}
public partial class Datum
{
[JsonProperty("employee_num")]
public string EmployeeNum { get; set; }
[JsonProperty("code")]
public string Code { get; set; }
[JsonProperty("startdate")]
public string Startdate { get; set; }
}
And this is how it is going to be populated:
var someClassObj = new SomeClass();
var datum = new Datum
{
EmployeeNum = "123",
Code = "321",
StartDate = "2003-03-03"
};
someClassObj.Data.Add(datum);
// You can add more objects in it as per your need.
And then to serialize this to a json you should do:
var json = JsonConvert.Serialize(someClassObj);
The output will be this:
{
"Data": [
{
"employee_num": "123",
"code": "321",
"startdate": "2003-03-03"
}
]
}

Create json object with multiple array in c#

I want to create JSON object with following format:-
{
"result": [
{
"name": "John",
"address": "US",
},
{
"name": "Josh",
"address": "Japan",
}
],
"error": [
{
"message": "error-message"
}
],
"success": [
{
"message": "success-message"
}
]
}
I have tried the following, but it doesn't help me.
dynamic record = new { result = new {name="", address=""},
error = new {message=""},
success = new {message=""} };
Update 1:-
Here is my code:-
List addressList = new List();
// Loop over items within the container and URI.
foreach (var item in items)
{
dynamic record = new { result = new object[] {
new {name = item.name, address = item.address} } };
addressList.Add(record);
}
Result:-
[ {
"result": [
{
"name": "John",
"address": "US"
}
]
},
{
"result": [
{
"name": "Jack",
"address": "CA"
}
]
}
]
Expected json result:-
[{
"result": [{
"name": "John",
"address": "US"
}]
},
{
"result": [{
"name": "Jack",
"address": "CA"
}],
"error": [{
"message": "error-message"
}],
"success": [{
"message": "success-message"
}]
}
]
How do I update my code to get above expected json result?

You...create arrays. You're not doing that. You're creating individual objects.
Something along the lines of:
dynamic record = new {
result = new object[] {
new {name = "John", address = "US"},
new {name = "Josh", address = "Japan"}
},
error = new object[] /*...*/,
success = new object[] /*...*/
};

If you want exactly JSON, then newtonsoft.Json makes it easier:
Json json = new Json();
json.result = new object[] {
new {name = "John", address = "US"},
new {name = "Josh", address = "Japan"}
};
// json.error = ... and so on
string output = JsonConvert.SerializeObject(product);
The output you will have is:
{
"result": [
{
"name": "John",
"address": "US",
},
{
"name": "Josh",
"address": "Japan",
}
],
"error": [
{
...
}
]
}
To deserialize it back, use:
Json deserializedJson = JsonConvert.DeserializeObject<Json>(output);

you are not creating an array
if you want to create JSON arrays from c# you have to use the following POCO
public class Result
{
public string name { get; set; }
public string address { get; set; }
}
public class Error
{
public string message { get; set; }
}
public class Success
{
public string message { get; set; }
}
public class RootObject
{
public List<Result> result { get; set; }
public List<Error> error { get; set; }
public List<Success> success { get; set; }
}
and then use Json.net
var json = JsonConvert.SerializeObject( "your instance of the root Object")

//You need to make this class structure first
public class Response
{
public List<Result> result { get; set; }
public List<Error> error { get; set; }
public List<Success> success { get; set; }
}
public class Result
{
public string name { get; set; }
public string address { get; set; }
}
public class Error
{
public string message { get; set; }
}
public class Success
{
public string message { get; set; }
}
// And then you can use it like this
var response = new Response()
{
result = new List<Result>
{
new Result() {name = "Jhon", address = "US"},
new Result() {name = "Jhon", address = "US"},
},
error = new List<Error>()
{
new Error() {message = "error-message 1"},
new Error() {message = "error-message 2"}
},
success = new List<Success>()
{
new Success(){message = "success-message 1"},
new Success(){message = "success-message 2"},
}
};

The Model Class
public class MegaMenu
{
public int department_id { get; set; }
public string department_name { get; set; }
public List<SectionListData> sectionListData { get; set; }
}
public class SectionListData
{
public int section_id { get; set; }
public string section_name { get; set; }
public List<ItemHeadList> itemHeadList { get; set; }
}
public class ItemHeadList
{
public int item_head_id { get; set; }
public string item_name { get; set; }
}
public class WrapperMegaMenu
{
public List<MegaMenu> megaMenuList { get; set; }
public string error { get; set; }
}
The Services
dept_result is the array of all department,section_result is the array of all section,Item_result is the array of all items
List<MegaMenu> listmenu = new List<MegaMenu>();
foreach (var each_dept in dept_result)
{
MegaMenu megaMenu = new MegaMenu();
megaMenu.department_id = each_dept.shopdepartment_id;
megaMenu.department_name = each_dept.name_en;
var temSectionList = section_result
.Where(item => item.shopdepartment_id == each_dept.shopdepartment_id).ToList().Select(sectionData => new SectionListData
{
section_id = sectionData.shopsection_id,
section_name = sectionData.name_en,
itemHeadList = Item_result.Where(itemHead => itemHead.shopsection_id == sectionData.shopsection_id).ToList().Select(itemHeadData => new ItemHeadList {
item_head_id = itemHeadData.item_head_id,
item_name = itemHeadData.name_en
}).ToList()
}).ToList();
megaMenu.sectionListData = temSectionList;
listmenu.Add(megaMenu);
}
//wrapperDept.departmentList = dept_result.ToList();
wrapper.megaMenuList = listmenu.ToList();
Result
{
"megaMenuList": [
{
"department_id": 71,
"department_name": "Baby's Hygiene",
"sectionListData": [
{
"section_id": 56,
"section_name": "Diapers",
"itemHeadList": []
},
{
"section_id": 57,
"section_name": "Wipes",
"itemHeadList": [
{
"item_head_id": 142,
"item_name": "Telivision"
}
]
}
]
}
]
}

How to convert JSON array into object list in the c#

I have a json object as below and I wants to convert it into
[
{
"Id": 1114,
"ParentId": 45333,
"IsActive": true,
"Name": "John",
"Contact": "123456"
},
{
"Id": 11344,
"ParentId": 54434,
"IsActive": false,
"Name": "Levi",
"Contact": "53552333"
},
{
"Id": 124433,
"ParentId": 535233,
"IsActive": false,
"Name": "Larry",
"Contact": "5443554"
}
]
}
I have tried below option but I am getting error "No parameterless constructor defined for type of 'MyApp.Emp[]'."
JavaScriptSerializer js = new JavaScriptSerializer();
Emp[] acc = js.Deserialize<Emp[]>(json);
Below is my Emp class
public class Emp
{
public Emp()
{
}
public int Id { get; set; }
public int ParentId { get; set; }
public bool IsActive { get; set; }
public string Name { get; set; }
public int Contact { get; set; }
}
Can anyone please show me how I can do it successfully.
Thanks

hopefully this answer is your want
PS : output
public JsonResult SaveResult()
{
return Json(new { err = "***"});
}
PS: input
public JsonResult ReadResult()
{
Object1 xxx = new Object1();
Object2 aa = new Object2();
xxx.x2.Add(aa);
aa = new Object2();
aa.y = "200";
aa.z = "222";
xxx.x2.Add(aa);
var json = JsonConvert.SerializeObject(xxx, Formatting.None);
return Json(json);
}
public class Object1
{
public string x1 = "aaaaa";
public IList<Object2> x2 = new List<Object2>();
}
public class Object2
{
public string y = "100";
public string z = "10";
}

Convert following class properties into Json format

I need to convert following Employee.cs class in json format,for that i wrote following code
//Employee.cs(In class file)
public class Employee
{
public string Name { get; set; }
public string Job { get; set; }
public string City { get; set; }
}
//In my MyPage.aspx page
Employee oEmployee1 =
new Employee { Name = "Pini", Job = "111", City = "30" };
Employee oEmployee2 =
new Employee { Name = "Yaniv", Job = "Developer", City = "Hyd" };
Employee oEmployee3 =
new Employee { Name = "Yoni", Job = "Developer", City = "Bglre" };
List<Employee> oList = new List<Employee>() { oEmployee1, oEmployee2, oEmployee3 };
System.Web.Script.Serialization.JavaScriptSerializer oSerializer =new System.Web.Script.Serialization.JavaScriptSerializer();
string sJSON = oSerializer.Serialize(oList);
Response.Write("<pre>"+sJSON+"</pre>");
I got following output:
[{"Name":"Pini","Job":"111","City":"30"},{"Name":"Yaniv","Job":"Developer","City":"Hyd"},{"Name":"Yoni","Job":"Developer","City":"Bglre"}]
Is it any other way to convert to json format more effectively and i want to beautify json output

I would use JSON.NET Serializer with Formatting.Indented like below
string result= JsonConvert.SerializeObject(obj, Formatting.Indented);
Output
[
{
"Name": "Pini",
"Job": "111",
"City": "30"
},
{
"Name": "Yaniv",
"Job": "Developer",
"City": "Hyd"
},
{
"Name": "Yoni",
"Job": "Developer",
"City": "Bglre"
}
]

list<Employee> oEmployee=
{
new Employee() { Name = "Pini", Job = "111", City = "30" },
new Employee() { Name = "Pini", Job = "111", City = "30" },
new Employee() { Name = "Pini", Job = "111", City = "30" },
};
var oSerializer=new JavaScriptSerializer();
string sJSON = oSerializer.Serialize(oList);
Response.Write("<pre>"+sJSON+"</pre>");
add the System.Web.Script.Serialization reference
add refer this link
http://matijabozicevic.com/blog/csharp-net-development/csharp-serialize-object-to-json-format-using-javascriptserialization