I want to send an object from Controller A to Controller B. Which parameter must receive B to process the data that I send from A with a POST.
The POST on A is made inside a controller using HttpClient not via jquery
Well assuming that you have a view model:
public class MyViewModel
{
public int Id { get; set; }
public string Foo { get; set; }
}
that your Controller B's action takes as parameter:
public ActionResult MyAction(MyViewModel model)
{
...
}
you could use the HttpClient to send the model as JSON:
var model = new MyViewModel
{
Id = 123,
Foo = "bar",
};
string data = JsonConvert.SerializeObject(model);
var httpClient = new HttpClient();
var content = new StringContent(data, Encoding.UTF8, "application/json");
var response = await httpClient.PostAsync(uri, content);
Related
I want to get JSON response from Web API Call. I am calling it like below
HttpClient client = new HttpClient();
client.BaseAddress = new Uri("http://myapi.proj.com/");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
client.DefaultRequestHeaders.Add("Authorization", "Basic TUNTRTpNQ1MhZTIwMTc=");
client.DefaultRequestHeaders.Add("ClientURL", "http://123.com");
var response = client.PostAsJsonAsync("api/name/", priceRequest).Result;
I am unable to JSON in response variable. I want to get JSON response and assign it to my class which is somewhat like below
public class Information
{
public int id{ get; set; }
public string Name{ get; set; }
public string address{ get; set; }
}
Try this:
Information obj = await response.Content.ReadAsAsync<Information>();
You need to reference System.Net.Http.Formatting assembly where extension method ReadAsAsync<T> is defined.
I found myself
This is what i used
var result = response.Content.ReadAsStringAsync().Result;
var test = Newtonsoft.Json.JsonConvert.DeserializeObject(result);
I am trying to get the json data from an external rest url(http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3) and display it on my web page in my asp.net mvc application. For that I have written some code i.e.
Controleer---
namespace MyMVCApplication.Controllers
{
public class EmployeeController : Controller
{
string Baseurl = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3";
public async Task<ActionResult> StateDetails()
{
List<State> listStateInfo = new List<State>();
using (var client = new HttpClient())
{
client.BaseAddress = new Uri(Baseurl);
client.DefaultRequestHeaders.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
HttpResponseMessage Res = await client.GetAsync(Baseurl);
if (Res.IsSuccessStatusCode)
{
//Storing the response details recieved from web api
var StateResponse = Res.Content.ReadAsStringAsync().Result;
//Deserializing the response recieved from web api and storing into the Employee list
listStateInfo = JsonConvert.DeserializeObject<List<State>>(StateResponse);
}
return View(listStateInfo);
}
}
}
}
Model----
namespace MyMVCApplication.Models
{
public class State
{
public int ObjectID { get; set; }
public string StateName { get; set; }
public int Black { get; set; }
public int Population { get; set; }
}
}
While debugging the code getting the error: "Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 10, position 1" at
JsonConvert.DeserializeObject.
Please suggest me how to solve this issue.
Replace your url with http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3?f=pjson to get the json version of the web service
We are using 3rd party api kraken.io to optimize our images.
The results of optimized image is posted in a Webhook.
In their api document it states: After the optimization is over Kraken will POST a message to the callback_url specified in your request in a JSON format application/json.
I am using ngrok to allow remote webhooks to send data to my development machine, using this article.
Results posted to the Callback URL:
HTTP/1.1 200 OK
{
"id": "18fede37617a787649c3f60b9f1f280d",
"success": true,
"file_name": "header.jpg",
"original_size": 324520,
"kraked_size": 165358,
"saved_bytes": 159162,
"kraked_url": "http://dl.kraken.io/18/fe/de/37617a787649c3f60b9f1f280d/header.jpg"
}
Class to Map
public class KrakenOptimizedResults
{
public string id { get; set; }
public bool success { get; set; }
public string file_name { get; set; }
public int original_size { get; set; }
public int kraked_size { get; set; }
public int saved_bytes { get; set; }
public string kraked_url { get; set; }
}
Action Method
[HttpPost]
public ActionResult OptimizedWebHook()
{
Request.InputStream.Position = 0;
string jsonString = new System.IO.StreamReader(Request.InputStream).ReadToEnd();
KrakenOptimizedResults obj = new JavaScriptSerializer().Deserialize<KrakenOptimizedResults>
(jsonString);
return Json(obj);
}
But When I debug the received jsonString in Html Visualizer it looks like key and value pairs instead of Json format.
Received Results not Json Formatted:
file_name=header.jpeg&original_size=118066&kraked_size=102459&saved_bytes=15607
I guess the received data content-type: is application/x-www-form-urlencoded.
Why i am receiving key and value pairs instead of Json format ? how can I deserialize Json data in asp.net mvc ?
Co-founder of https://kraken.io here.
There is a glaring omission in our documentation which I will fix today. To get JSON back, you need to set a "json": true flag in the request. Omitting that flag or setting "json": false will return URLEncoded. Example cURL request:
curl http://api.kraken.io/v1/upload -X POST --form data='{"auth":{"api_key":"YOUR_KEY", "api_secret":"YOUR_SECRET"}, "wait": true, "lossy": true, "callback_url": "http://requestb.in/wbhi63wb", "json": true}' --form upload=#test.jpg
Sorry for the inconvenience :-(
I was able to convert Query String Key and Value pairs to Json Format using this and this post ,there is some delay to convert form Dictionary to Json, so If there is better answers, then do post and advice, below is my solution.
Action Method
[HttpPost]
public ActionResult OptimizedWebHook()
{
Request.InputStream.Position = 0;
string data = new System.IO.StreamReader(Request.InputStream).ReadToEnd();
var dict = HttpUtility.ParseQueryString(data);
var json = new JavaScriptSerializer().Serialize(dict.AllKeys.ToDictionary(k => k, k =>
dict[k]));
KrakenOptimizedResults obj = new JavaScriptSerializer().Deserialize<KrakenOptimizedResults>
(json);
return Json(obj);
}
Recieving JSON formated optimized results from kraken API.
As mentioned by #karim79, To get JSON back, you need to set a "json": true flag in the request.
As Kraken .Net/C# SDK didn't have option to set "json": true, so i have to extend their base class.
Extended Base Class:
public class OptimizeRequestBaseExtended : OptimizeRequestBase,
IOptimizeUploadRequest, IRequest
{
public OptimizeRequestBaseExtended(Uri callbackUrl)
{
CallbackUrl = callbackUrl;
}
[JsonProperty("callback_url")]
public Uri CallbackUrl { get; set; }
[JsonProperty("json")]
public bool JsonFormat { get; set; }
}
Request Kraken API:
var callbackUrl = new Uri("http://localhost:0000/Home/OptimizedWebHook");
OptimizeRequestBaseExtended settings = new OptimizeRequestBaseExtended(callbackUrl);
settings.Lossy = true;
settings.JsonFormat = true;
var response = client.Optimize(image: image, filename: filename, optimizeRequest: settings);
Action Method
[HttpPost]
public ActionResult OptimizedWebHook()
{
Request.InputStream.Position = 0;
string jsonString = new System.IO.StreamReader(Request.InputStream).ReadToEnd();
KrakenOptimizedResults obj = JsonConvert.DeserializeObject<KrakenOptimizedResults>
(jsonString);
return Json(obj);
}
Step 1:
Create an aspx page. This page must be able to accept HTTP POST request.
Step 2:
Add this code to get HTTP POST data.File: default.aspx.cs
File: default.aspx.cs
var reader = new StreamReader(Request.InputStream);
var json = reader.ReadToEnd();
FileStream ostrm;
StreamWriter writer;
TextWriter oldOut = Console.Out;
ostrm = new FileStream(#"C:\logfile4webhook.txt", FileMode.Append, FileAccess.Write);
writer = new StreamWriter(ostrm);
Console.SetOut(writer);
Console.Write(DateTime.Now + " ");
Console.WriteLine(json.ToString() + " ");
Console.SetOut(oldOut);
writer.Close();
ostrm.Close();
Step 3:
Create webhook. This code can be linked to a button on click event.File:default.aspx.cs
AuthenticationDetails auth = new ApiKeyAuthenticationDetails("your api key");
string listID = "";
listID = "your list id";
List list = new List(auth, listID);
List<string> events = new List<string>();
events.Add("Update");
string postback = list.CreateWebhook(events, "URL", "json");
FileStream ostrm;
StreamWriter writer;
TextWriter oldOut = Console.Out;
ostrm = new FileStream(#"C:\logfile4webhook.txt", FileMode.Append, FileAccess.Write);
writer = new StreamWriter(ostrm);
Console.SetOut(writer);
Console.Write(DateTime.Now + " ");
Console.WriteLine(postback + " ");
Console.SetOut(oldOut);
writer.Close();
ostrm.Close();
Step 4:
Activate webhook. Copy that webhook id from the text file and past it to the code below.
File:default.aspx.cs
AuthenticationDetails auth = new ApiKeyAuthenticationDetails("your api key");
string listID = "";
listID = "your list id";
List list = new List(auth, listID);
list.ActivateWebhook("webhook id");
Step 5:
Test weebhook.File: default.aspx.cs
AuthenticationDetails auth = new ApiKeyAuthenticationDetails("your api key");
string listID = "";
listID = "your list id";
List list = new List(auth, listID);
string postback = list.TestWebhook("webhook id").ToString();
FileStream ostrm;
StreamWriter writer;
TextWriter oldOut = Console.Out;
ostrm = new FileStream(#"C:\logfile4webhook.txt", FileMode.Append, FileAccess.Write);
writer = new StreamWriter(ostrm);
Console.SetOut(writer);
Console.Write(DateTime.Now + " ");
Console.WriteLine(postback + " ");
Console.SetOut(oldOut);
writer.Close();
ostrm.Close();
Step 6:
Deserialize body of JSON object. We need to create class structure based on JSON data. I put sample json here and it created required classes
public class CustomField
{
public string Key { get; set; }
public string Value { get; set; }
}
public class Event
{
public List<CustomField> CustomFields { get; set; }
public string Date { get; set; }
public string EmailAddress { get; set; }
public string Name { get; set; }
public string SignupIPAddress { get; set; }
public string Type { get; set; }
}
public class RootObject
{
public List<Event> Events { get; set; }
public string ListID { get; set; }
}
Once you have created your class, append the code from step 2 after
var json = reader.ReadToEnd();
to deserialize and parse json.
RootObject myClass = JsonConvert.DeserializeObject(json);
if (myClass != null)
{
List<Event> t = myClass.Events;
string old_email = "", new_email = "";
old_email = t[0].OldEmailAddress;
new_email = t[0].EmailAddress;
//now you can do your logic with old_email and new_email
}
I have my code, where i fetch data from a url and parse that data with json.
public async void GetItems()
{
HttpResponseMessage response = new HttpResponseMessage();
HttpClient httpclient = new HttpClient();
Uri uri = new Uri("URL");
response = await httpclient.GetAsync(uri);
if (response.IsSuccessStatusCode)
{
var JsonContent = await response.Content.ReadAsStringAsync();
JArray jArray = JArray.Parse(JsonContent);
foreach (var data in jArray)
{
var latitude = data["latitude"];
Console.WriteLine(latitude);
}
}
}
in this code I get all my data and print them into the console.
I have a class with the variables i want to set
public class FetchedObjects
{
public string name { get; set; }
public double latitude { get; set; }
public double longitude { get; set; }
}
How can I store each data from my jArray into these variables? I want to have access to these from my ios or android project.
EDIT
I have some values in json, which are null. How can i handle these, while creating the list? My App crashes, it says :
Error setting value to 'valuename' on 'App.FetchedObjects'
Try it code:
List<FetchedObjects> list = jArray.ToObject<List<FetchedObjects>>();
Edit
in pcl library create class:
public class YourClass
{
public async Task<List<FetchedObjects>> GetItems()
{
....
if(jArray != null)
{
List<FetchedObjects> list = jArray.ToObject<List<FetchedObjects>>();
return list;
}
else
{
return null;
}
...
}
Add reference to pcl library in your ios and android projects and Use class YourClass
I am not getting any root value of the Json Format.
I am getting the response as follows:
[{"Username":"demo","UserID":8,"Password":"demo","EmaiID":"demo#gmail.com"}]
I would like to have the format as follows
{UserList: [[{"Username":"demo","UserID":8,"Password":"demo","EmaiID":"demo#gmail.com"}]}
Service Declaration :
public interface IDemo
{
[OperationContract]
[WebInvoke(RequestFormat = WebMessageFormat.Json,ResponseFormat =
WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare,
UriTemplate = "/Validate", Method = "POST")]
Stream ValidateUser(Login obj);
}
[DataContract]
public class Login
{
public Login()
{
}
[DataMember]
public string Username { get; set; }
[DataMember]
public string Password { get; set; }
}
Service Definition :
public class Demo: IDemo
{
string Json = string.Empty;
JavaScriptSerializer obj1 = new JavaScriptSerializer();
public Stream ValidateUser(Login obj)
{
UserList objUserList = new UserList();
Users objUser = new Users();
objUser.Username = obj.Username;
objUser.Password = obj.Password;
objUserList = LoginDataService.ValidateUser(objUser.Username,objUser.Password) ;
if (objUserList.Count > 0)
{
Json = obj1.Serialize(objUserList);
WebOperationContext.Current.OutgoingResponse.ContentType =
"application/json; charset=utf-8";
}
else
{
UserError objError = new UserError();
objError.ErrMsg = "LoginFailed";objError.Username = objUser.Username ;
Json = obj1.Serialize(objError);
WebOperationContext.Current.OutgoingResponse.ContentType =
"application/json; charset=utf-8";
}
return new MemoryStream(Encoding.UTF8.GetBytes(Json));
}
}
Can anyone help me to get the result with root element and let me know what kind of mistake i have done.
Thanks & Regards,
Vijay
You are getting the format like that since you are serializing a collection into JSON. You can return a class that wraps the list inside as a property then you will get what you desire.
For ex. you can create a class like this
public class UserListResponse
{
public UserList UserList{get; set;}
}
Now you get the JSON as what you expected, like
{UserList:[..]}
I don't understand why you are returning a Stream and doing yourself all the serialization framework, basically this all done by the framework. All you have to do is return the wrapper class UserListResponse from the service method.
public class Demo: IDemo
{
public UserListResponse ValidateUser(Login obj)
{
...
return new UserListResponse{ UserList = objUserList};
}
}
The WCF will take care of returning the structure into JSON or XML and you don't need to worry about that.
While the above solution perfectly works you can also try using paramter BodyStyle=WebMessageBodyStyle.WrappedResponse of WebInvoke attribute on your method.
This wraps the values in type name.