I am writing two applications (Web API's) in .NET . From the app A I want to call a method in Controller of app B using Http Request.
Here
using (var askPensionerDetails = new HttpClient())
{
double pensionToDisburse = 0;
askPensionerDetails.BaseAddress = new Uri("http://localhost:55345/api/pensionerdetails/");
var responseTask = askPensionerDetails.GetAsync("getById?pan=" + inputOfPensioner.PAN);
responseTask.Wait();
var result =responseTask.Result ;
if (result.IsSuccessStatusCode)
{
var readTask = result.Content.ReadFromJsonAsync<object>();
readTask.Wait();
return Ok(readTask.Result);
}
}
The output for this in postman is
{
"name": "bunk seenu",
"dateOfBirth": "1990-01-02T00:00:00",
"pan": "ABCD12351E",
"salaryEarned": 45000,
"allowances": 500,
"pensionType": 1,
"bankDetails": {
"bankName": "SBI",
"accountNumber": "SBI00001BS",
"bankType": 0
}
}
That was a desired output. But the problem is how to access the properties like bankdetails,name,pan,salaryEarned.
I have tried using readTask.Result["name"] but it is throwing error.
I have also tried using result.Content.ReadAsStringASync();
But the output in postman is
{
"name": [],
"dateOfBirth": [],
"pan": [],
"salaryEarned": [],
"allowances": [],
"pensionType": [],
"bankDetails": [
[
[]
],
[
[]
],
[
[]
]
]
}
I don't have class associated with the result type of Json for statement readTask = result.Content.ReadFromJsonAsync(); (As per design constraints).
From the docs:
If you have JSON that you want to deserialize, and you don't have the class to deserialize it into, you have options other than manually creating the class that you need:
Deserialize into a JSON DOM (document object model) and extract what you need from the DOM.
The DOM lets you navigate to a subsection of a JSON payload and deserialize a single value, a custom type, or an array. For information about the JsonNode DOM in .NET 6, see Deserialize subsections of a JSON payload. For information about the JsonDocument DOM, see How to search a JsonDocument and JsonElement for sub-elements.
Use the Utf8JsonReader directly.
Use Visual Studio 2019 to automatically generate the class you need:
Copy the JSON that you need to deserialize.
Create a class file and delete the template code.
Choose Edit > Paste Special > Paste JSON as Classes. The result is a class that you can use for your deserialization target.
You can use Newtonsoft.Json
JObject jo = JObject.Parse(readTask.Result);
var name = jo["name"];
if(string.IsNnullOrEmpty(name)){
///some code
}
Related
I have a NodeJS Server and a C# Unity Client. The NodeJS server sends an object to the C# client.
SERVER
var obj = new Object();
obj.name = data.name;
obj.position = data.position;
var jsonString= JSON.stringify(obj);
C# Client
try
{
Debug.Log(response.ToString()); // WORKS the result is
/*
[
{
"name": "Peter",
"position": "(13.6, 1.5, 2.3)"
}
]
*/
Debug.Log(response.GetValue(1).ToString()); // Don't work, receive in console (ERROR).
}
catch
{
Debug.Log("Error");
}
Output
[
{
"name": "Peter",
"position": "(13.6, 1.5, 2.3)"
}
]
So I try to read the JSON to get the Value Name and Position.
I have already tried the following:
string resVal1 = response.GetValue<string>();
Enemy resVal2 = response.GetValue<Enemy>(1);
string enemyName= response.GetValue(1).Value<string>("name");
Source:
https://github.com/doghappy/socket.io-client-csharp
I also only get "Error" here. What am I doing wrong? How do I get name and position from the JSON string. I have not much experience with JSON.
The JSON returned is an array with a single element, that element is an object with 2 properties - one of which is name so I suspect he correct code to read that would be:
string enemyName= response.GetValue(0).Value<string>("name");
I'm working on a project that involves automating API calls using a Swagger Definition. I download the swagger.json file. The structure of the JSON Object I need to parse is not consistent. When parsing paths, there are a list of objects, then within that they have the methods that can be used for that specific path. I can retrieve just the path using various string methods but my question was, is there a good way to parse json if the JSON is structured in such a way that it does not have a firm key? Here is an example of what I mean:
{"/user": {
"post": {
"tags": [
"user"
],
"summary": "Create user",
"description": "This can only be done by the logged in user.",
"operationId": "createUser",
"consumes": [
"application/json"
],
"produces": [
"application/json",
"application/xml"
],
"parameters": [
{
"in": "body",
"name": "body",
"description": "Created user object",
"required": true,
"schema": {
"$ref": "#/definitions/User"
}
}
],
"responses": {
"default": {
"description": "successful operation"
}
}
}
}
If I wanted to just parse that path and retrieve the method object how could I go about that considering sometimes the object will be "post" or sometimes it will be "get", "put", etc depending on what is allowable for the path.
JObject jsonResp = swaggerDownload();
JObject paths = (JObject)jsonResp["paths"];
foreach (var i in paths)
{
string pathToString = i.ToString();
var shaveSomethings = pathToString.Substring(1, something.Length - 2);
var pathAndJson = shaveSomethings.Split(new[] { ',' }, 2);
string correctJsonStructure = "{\"" + pathAndJson[0] + "\":" + pathAndJson[1] + "}";
JObject bd = JObject.Parse(correctJsonStructure);
//dynamic pathsTest = JsonConvert.DeserializeObject<dynamic>(correctJsonStructure);
//JObject result = JsonConvert.DeserializeObject<JObject>(correctJsonStructure);
//Console.WriteLine(bd["/user"]);
}
The swagger.json file should have full definition of each entity that endpoints return. You can follow How to create Rest API client to get a working client.
I've dealt with an API where responses didn't always match the definition. I saved all responses to a store/log first and then would try to de-serialize JSON. In case of an exception I would go back to store/log and see what was different and update my code to accommodate for the change. After few iterations there were no new changes and the ordeal was over.
Hope that helps.
Here's my code:
JavaScriptSerializer serializer = new JavaScriptSerializer();
Dictionary<string, string> responseVals = serializer.Deserialize<Dictionary<string, string>>(response);
When response is
{
"status": 21007
}
it works.
When response is
{
"receipt": {
"receipt_type": "ProductionSandbox",
"adam_id": 0,
"app_item_id": 0,
"bundle_id": "...",
"application_version": "1.0",
"download_id": 0,
"version_external_identifier": 0,
"receipt_creation_date": "...",
"receipt_creation_date_ms": "...",
"receipt_creation_date_pst": "...",
"request_date": "...",
"request_date_ms": "...",
"request_date_pst": "...",
"original_purchase_date": "...",
"original_purchase_date_ms": "...",
"original_purchase_date_pst": "...",
"original_application_version": "1.0",
"in_app": [
{
"quantity": "1",
"product_id": "...",
"transaction_id": "...",
"original_transaction_id": "...",
"purchase_date": "...",
"purchase_date_ms": "...",
"purchase_date_pst": "...",
"original_purchase_date": "...",
"original_purchase_date_ms": "..",
"original_purchase_date_pst": "...",
"is_trial_period": "false"
}
]
},
"status": 0,
"environment": "Sandbox"
}
I get an error:
No parameterless constructor defined for type of 'System.String'
Why the difference?
This is in a web service (Asp.net) verifying an iOS in app purchase (in sandbox). Perhaps this matters.
Why the difference?
Your first example is working because you are passing primitive data
to deserialize into Dictionary<string, string>, but in second example you are trying to convert custom
object i.e receipt to string which is not prossible
If you want to deserialize specific property then you can convert this json string to JObject and then use that property to get the value
string json = #"{
status: '20122',
OS: [
'Windows',
'macintosh'
]
}";
JObject obj = JObject.Parse(json);
Console.WriteLine(obj["status"]); //20122
.Net fiddle
One of the major advantages of Json decoders, is that they generally ignore any fields that are present in the json, but not in the deserialised class.
If you just want status and ignore all the rest, you can do this:
public class Data
{
public string Status {get;set;}
}
public void A()
{
Data data = Newtonsoft.Json.JsonConvert.DeserializeObject<Response>(response);
}
The second response will not be deserialized into a dictionary, you can try desirialize it to object.
object objClass = Newtonsoft.Json.JsonConvert.DeserializeObject<object>(response);
or create your own object and deserialize to it.
You can use from Json to classes, it will generate classes based on your json structure.
I have a problem;
I would to know if there is a method to parse json file without having a unique format. So it may have different attributes but all of them contain the attribute Status but it can be in double.
{
"requestid": "1111",
"message": "db",
"status": "OK",
"data": [
{
"Status": "OK", // this one I would to test first to read the other attributes
"fand": "",
"nalDate": "",
"price": 1230000,
"status": 2
}
]
}
With https://www.newtonsoft.com/json
Data data = JsonConvert.DeserializeObject<Data>(json);
And create the class Data with the interesting data inside the json
The defacto standard Json serializer for .NET is Newtonsoft.Json (How to install). You can parse the Json into an object graph and work on that in any order you like:
namespace ConsoleApp3
{
using System;
using Newtonsoft.Json.Linq;
class Program
{
static void Main()
{
var text = #"{
'requestid': '1111',
'message': 'db',
'status': 'OK',
'data': [
{
'Status': 'OK', // this one I would to test first to read the other attributes
'fand': '',
'nalDate': '',
'price': 1230000,
'status': 2
}
]
}";
var json = JObject.Parse(text);
Console.WriteLine(json.SelectToken("data[0].Status").Value<string>());
Console.ReadLine();
}
}
}
So i'm trying to deserialise a JSON response implicitly back into a object instance using the following code.
DataContractJsonSerializer jsonSerialiser = new DataContractJsonSerializer(responseType);
responseBase = jsonSerialiser.ReadObject(responseStream);
The response if piped out as a string looks as follows
{
"20170317112739": {
"start": {
"SQ": 4577,
"TS": "2017-03-17T11:26:59",
"FisCode": "_R1-AT1_001/1_SQ4577_2017-03-17T11:26:59_0,00_0,00_0,00_0,00_0,00_vr1zl86Y_49e862eb_rNvvLM3FKh4=_DGZt+z+A3fY8zLlt2E55R8zCD/wf7yw9q/VivAiaNtxNpaTkhlTONAsD6yc+8Vcxwnm/lBalIwEI6GswC04kqg=="
},
"close": {
"SQ": 4667,
"TS": "2017-03-17T11:27:39",
"FisCode": "_R1-AT1_001/1_SQ4667_2017-03-17T11:27:16_0,00_0,00_0,00_0,00_0,00_r/82sV+w_49e862eb_FD/gDnivnes=_LKmvkk5OEoL7EFIebQU73VDVfPGzRGOyKNLlIW1mJkvPpqS0oVdWmqiNGR0cnpT35ArF++XzO1D/q7keTJe4cA=="
}
},
"current": {
"start": {
"SQ": 4670,
"TS": "2017-03-17T11:27:39",
"FisCode": "_R1-AT1_0/1_SQ4670_2017-03-17T11:27:39_0,00_0,00_0,00_0,00_0,00_/agx6rsw_49e862eb_qTh1/lCawvo=_f7yNP/+WUWZCojerZ9fe/wID1gll0I37swEKsauV8h7g8gSCFZ2Ykg45JjkO7BrChCBkl0ewohuGdbP4haLbrQ=="
},
"2017-03": {
"SQ": 4673,
"TS": "2017-03-17T11:27:39",
"FisCode": "_R1-AT1_0/1_SQ4670_2017-03-17T11:27:39_0,00_0,00_0,00_0,00_0,00_/agx6rsw_49e862eb_qTh1/lCawvo=_f7yNP/+WUWZCojerZ9fe/wID1gll0I37swEKsauV8h7g8gSCFZ2Ykg45JjkO7BrChCBkl0ewohuGdbP4haLbrQ=="
}
},
"lic": "0SvXs"
}
Simple responses from the JSON service are no problem i can simply decorate these with [DataContract] and [DataMember].
The problem with this particular service response is that item names such as "2017-03" will change depending on when the call is made to during other months/years.
How do i deal with this in C#?, can someone supply an example of how my class should look?
For the life of me i cannot get this data into my object class!
You can have a dynamic dictionary as suggested in this post Deserialize JSON into C# dynamic object?
Or you can implement something like this with the help of System.Web.Helpers
using (StreamReader r = new StreamReader("sample.json"))
{
string json = r.ReadToEnd();
dynamic data = Json.Decode(json);
Console.WriteLine(data["20170317112739"].start.sq);
}
Here sample.json contains your sample JSON response.