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POST or Get Request with Json response in C# windows Form App

I made an API in server side with PHP + Laravel framework which accept both GET & Post requests with some special parameters.
It's address is : http://beresun.ir/API/Orders/0
and it gets these parameters :
token > string ,
restaurant_id > integer ,
admin_id > integer ,
token_id > integer .
if we send a request with GET method with these parameters, for example it will be :
http://beresun.ir/API/Orders/0?token=2JEuksuv86DcFmLrQa7nna4QDeowuGTqpyUK0pf9wSlbe6D5hLtEVxvzMT5gAZG0xBKy00HxS3J79mcr8F54dBD0uIg5HX5fzPOAP&restaurant_id=1&admin_id=2&token_id=40 which returns a json data , you can click on the link to see the results .
the response json data includes some information about customers and it's products.
now I want to make a windows application for this service with C# and request data from this API with POST or GET methods :
I want to use this API to get Json data from Web server and save them in my Windows application , So I created two functions in one of my Form Classes :
using Newtonsoft.Json;
using System;
using System.IO;
using System.Net;
using System.Text;
using System.Windows.Forms;
public partial class MainActivity : Form
{
string token = "2JEuksuv86DcFmLrQa7nna4QDeowuGTqpyUK0pf9wSlbe6D5hLtEVxvzMT5gAZG0xBKy00HxS3J79mcr8F54dBD0uIg5HX5fzPOAP";
int restaurant_id = 1;
int admin_id = 2;
int token_id = 40;
private void SendWebrequest_Get_Method()
{
try
{
String postData = "token=" + token +
"&restaurant_id=" + restaurant_id +
"&admin_id=" + admin_id +
"&token_id=" + token_id;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://beresun.ir/API/Orders/0?" + postData);
request.ContentType = "application/json; charset=utf-8";
request.Accept = "application/json";
request.Method = WebRequestMethods.Http.Get;
WebResponse response = request.GetResponse();
StreamReader sr = new StreamReader(response.GetResponseStream());
String json_text = sr.ReadToEnd();
dynamic stuff = JsonConvert.DeserializeObject(json_text);
if (stuff.error != null)
{
MessageBox.Show("problem with getting data", "Error");
}
else
{
MessageBox.Show(json_text, "success");
}
sr.Close();
}
catch (Exception ex)
{
MessageBox.Show("Wrong request ! " + ex.Message, "Error");
}
}
private void SendWebrequest_POST_Method()
{
try
{
// Create a request using a URL that can receive a post.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://beresun.ir/API/Orders/5");
// Set the Method property of the request to POST.
request.Method = "POST";
request.Credentials = CredentialCache.DefaultCredentials;
((HttpWebRequest)request).UserAgent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";
// Create POST data and convert it to a byte array.
string postData = "token=" + token +
"&restaurant_id=" + restaurant_id +
"&admin_id=" + admin_id +
"&token_id=" + token_id;
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
// Set the ContentType property of the WebRequest.
request.ContentType = "application/json; charset=utf-8";
// Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length;
// Get the request stream.
Stream dataStream = request.GetRequestStream();
// Write the data to the request stream.
dataStream.Write(byteArray, 0, byteArray.Length);
// Close the Stream object.
dataStream.Close();
// Get the response.
WebResponse response = request.GetResponse();
// Display the status.
MessageBox.Show(((HttpWebResponse)response).StatusDescription);
// Get the stream containing content returned by the server.
dataStream = response.GetResponseStream();
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader(dataStream);
// Read the content.
string responseFromServer = reader.ReadToEnd();
// Display the content.
MessageBox.Show(responseFromServer);
// Clean up the streams.
reader.Close();
dataStream.Close();
response.Close();
}
catch (Exception ex)
{
MessageBox.Show("Wrong request ! " + ex.Message, "Error");
}
}
}
Now Here is the problem , when I test the API it works fine , but when I request data from my application , it returns error and not working .
Can anyone explain me how I should request data from this API , to get data , I searched a lot , and I used many different methods , but none of them worked for me . maybe because this API returns very much Json data or maybe request timeout happen. I don't know , I couldn't find the problem . So I asked it Here.
I don't know what I should do .
Thanks

Oki so i run your code :
private string TestURL = "http://beresun.ir/API/";
string token = "2JEuksuv86DcFmLrQa7nna4QDeowuGTqpyUK0pf9wSlbe6D5hLtEVxvzMT5gAZG0xBKy00HxS3J79mcr8F54dBD0uIg5HX5fzPOAP";
int restaurant_id = 1;
int admin_id = 2;
int token_id = 40;
public async Task<string> test()
{
try
{
using (var Client = new HttpClient())
{
Client.BaseAddress = new Uri(TestURL);
Client.DefaultRequestHeaders.Accept.Clear();
Client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
string postData = "token=" + token +
"&restaurant_id=" + restaurant_id +
"&admin_id=" + admin_id +
"&token_id=" + token_id;
HttpResponseMessage responce = await Client.GetAsync("Orders/0?" + postData);
if (responce.IsSuccessStatusCode)
{
var Json = await responce.Content.ReadAsStringAsync();
// !
return Json;
}
else
{
// deal with error or here ...
return null;
}
}
}
catch (Exception e)
{
return null;
}
}
and its working am getting the json file ,, i think your mistake is in postData is string Not String ! a simple type can amazing harm !

try this:
private string URL = "Your Base domain URL";
public async Task<YourModel> getRequest()
{
using (var Client = new HttpClient())
{
Client.BaseAddress = new Uri(URL);
Client.DefaultRequestHeaders.Accept.Clear();
Client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
HttpResponseMessage responce = await Client.GetAsync("Your Method or the API you callig");
if (responce.IsSuccessStatusCode)
{
var Json = await responce.Content.ReadAsStringAsync();
var Items= JsonConvert.DeserializeObject<YourModel>(Json);
// now use you have the date on Items !
return Items;
}
else
{
// deal with error or here ...
return null;
}
}
}

Posting a json to a distant server(REST)

I want to send some json data using this code to a distant server (Rest, outside my control), following the way I'm sending it :
I create the url and the request method first :
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(gUrlDot);
request.Method = "POST";
Dictionary<String, String> lDictionary = new Dictionary<String, String>();
System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
Dot lDot= new Dot();
serviceContext lserviceContext = new serviceContext();
items litems = new items();
lDot.rad = pClient;
lDictionary.Add("companyId", "00230");
lDictionary.Add("treatmentDate", lGlobals.FormatDateYYYYMMDD());
lDictionary.Add("country", "FR");
lDictionary.Add("language", "fr");
lDictionary.Add("Id", "test");
litems.contextItem = lDictionary;
lDot.serviceContext = lserviceContext;
lDot.serviceContext.items = litems;
String Input=_Tools.JsonSerializer(lDot);
log.Debug("Input Dot " + Input);
Byte[] byteArray = encoding.GetBytes(Input);
request.ContentLength = byteArray.Length;
request.ContentType = #"application/json";
using (Stream dataStream = request.GetRequestStream())
{
dataStream.Write(byteArray, 0, byteArray.Length);
}
long length = 0;
When i'm getting here it crashes with an execption : Error 500 !
try
{
using (var response = (HttpWebResponse)request.GetResponse())
{
length = response.ContentLength;
string output = response.ToString();
lTrace.AppendLine("-Flux Json recu => " + response.StatusCode + " " + length);
log.Debug("Output Dot " + output);
}
log.Info(LogsHelper.LogHeader("End processing Get list ", pClient, Service.SrvGetList, "", lResponse.StatusCode, lResponse.StatusLabel, lResponse.ResponseObject, ref lTrace));
}
catch (Exception ex)
{
lResponse.StatusCode = StatusCodes.ERROR_COMMUNICATION;
log.Error(LogsHelper.LogHeader("End processing Get list", pClient, Service.SrvGetList, "", lResponse.StatusCode, ex.Message, lResponse.ResponseObject, ref lTrace));
}
return lResponse;
}
what am i missing here?

A 500 error means there's a problem on the server you're making the request to. You'll need to check to make sure two things;
1) Make sure your request is properly formatted, and doesn't have any surprises or invalid values for the requested resource.
2) that the server you want to talk to CAN get requests, and that its up-to-date (if you control the client).
In either case, the most common reason for a 500 is that something outside of your control has gone wrong on the client server.

why i can't access web page source behind user login using HttpWebRequest.Credentials

I'm trying to make windows phone silverlight app that reads web page source. And it does, but only for pages that don't need authentication. I am new to programming and I looked WP8 JumpStart at MVA and their example works fine until I try access specific page that have SSL. For the past two days I tried bunch of thing but nothing worked for me. This is my most recent function that should do the job:
private async void ReadPage()
{
CookieContainer container = new CookieContainer();
var request = HttpWebRequest.Create("url") as HttpWebRequest;
byte[] bytes = System.Text.UTF8Encoding.UTF8.GetBytes("usrname" + ":" + "pass");
string authInfo = Convert.ToBase64String(bytes);
request.Headers[System.Net.HttpRequestHeader.Authorization] = "Basic " + authInfo;
request.CookieContainer = container;
request.Accept = "application/json;odata=verbose";
var factory = new TaskFactory();
var task = factory.FromAsync<WebResponse>(request.BeginGetResponse, request.EndGetResponse, null);
try
{
var response = await task;
Stream responseStream = response.GetResponseStream();
string data;
using (var reader = new StreamReader(responseStream))
{
data = reader.ReadToEnd();
}
txtContent.Text = data;
}
catch (Exception e)
{
var we = e.InnerException as WebException;
if (we != null)
{
var resp = we.Response as HttpWebResponse;
var code = resp.StatusCode;
MessageBox.Show("RespCallback Exception raised! Message: " + we.Message +
" HTTP Status: " + we.Status);
}
else
throw e;
}
}
Every time I call it, it takes me to the login site which should be already authenticated. At least I think so... I looked at few solutions but nothing helpful for me (or I overlooked something). Does anyone have an idea?
Thanks in advance

verifying iOS in app purchase receipt with C#

I am verifying my ios in app purchase receipt on my server using C# web service
I got receipt as string by doing below in Xcode:
- (void) completeTransaction: (SKPaymentTransaction *)transaction
{
NSString* receiptString = [[NSString alloc] initWithString:transaction.payment.productIdentifier];
NSLog(#"%#",receiptString);
NSURL *receiptURL = [[NSBundle mainBundle] appStoreReceiptURL];
NSData *receipt = [NSData dataWithContentsOfURL:receiptURL];
NSString *jsonObjectString = [receipt base64EncodedStringWithOptions:0];
}
and I am sending that string(receipt) to my C# web service as parameter.
Here is my web service method:
[WebMethod(Description = "Purchase Item Verify")]
public string PurchaseItem(string receiptData)
{
string returnmessage = "";
try
{
var json = "{ 'receipt-data': '" + receiptData + "'}";
ASCIIEncoding ascii = new ASCIIEncoding();
byte[] postBytes = Encoding.UTF8.GetBytes(json);
HttpWebRequest request;
request = WebRequest.Create("https://sandbox.itunes.apple.com/verifyReceipt") as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = postBytes.Length;
Stream postStream = request.GetRequestStream();
postStream.Write(postBytes, 0, postBytes.Length);
postStream.Close();
var sendresponse = (HttpWebResponse)request.GetResponse();
string sendresponsetext = "";
using (var streamReader = new StreamReader(sendresponse.GetResponseStream()))
{
sendresponsetext = streamReader.ReadToEnd();
}
returnmessage = sendresponsetext;
}
catch (Exception ex)
{
ex.Message.ToString();
}
return returnmessage;
}
It always return {"status":21002}.
I have been searching for two days , but still can't find out the solution. Can someone help me, what am i wrong ?
**I am testing on sandbox that is why i use sandbox URL. I can verify the transaction receipt within my app.

I got solution
The final code that works for me is:
public string PurchaseItem(string receiptData)
{
string returnmessage = "";
try
{
// var json = "{ 'receipt-data': '" + receiptData + "'}";
var json = new JObject(new JProperty("receipt-data", receiptData)).ToString();
ASCIIEncoding ascii = new ASCIIEncoding();
byte[] postBytes = Encoding.UTF8.GetBytes(json);
// HttpWebRequest request;
var request = System.Net.HttpWebRequest.Create("https://sandbox.itunes.apple.com/verifyReceipt");
request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = postBytes.Length;
//Stream postStream = request.GetRequestStream();
//postStream.Write(postBytes, 0, postBytes.Length);
//postStream.Close();
using (var stream = request.GetRequestStream())
{
stream.Write(postBytes, 0, postBytes.Length);
stream.Flush();
}
// var sendresponse = (HttpWebResponse)request.GetResponse();
var sendresponse = request.GetResponse();
string sendresponsetext = "";
using (var streamReader = new StreamReader(sendresponse.GetResponseStream()))
{
sendresponsetext = streamReader.ReadToEnd().Trim();
}
returnmessage = sendresponsetext;
}
catch (Exception ex)
{
ex.Message.ToString();
}
return returnmessage;
Spending two and half days just to change a method. Thanks GOD.

Here's an alternative asynchronous implementation using HTTPClient:
public static async Task<string> CheckReceiptWithAppStore()
{
string responseStr = null;
string uri = "https://sandbox.itunes.apple.com/verifyReceipt";
string receiptData = // Get your receipt from wherever you store it
var json = new JObject(new JProperty("receipt-data", receiptData),
new JProperty("password", "paste-your-shared-secret-here")).ToString();
using (var httpClient = new HttpClient())
{
if (receiptData != null)
{
HttpContent content = new StringContent(json);
try
{
Task<HttpResponseMessage> getResponse = httpClient.PostAsync(uri, content);
HttpResponseMessage response = await getResponse;
responseStr = await response.Content.ReadAsStringAsync();
}
catch (Exception e)
{
Console.WriteLine("Error verifying receipt: " + e.Message);
}
}
}
return responseStr;
}
The shared secret is not required for non-subscription based purchases.

For managing subscriptions, #Jerry Naing's answer also requires the provision of your shared secret (can be retrieved/generated from iTunes Connect). Easiest way to include this is just to add an additional property in the line defining the json var.
var json = new JObject(new JProperty("receipt-data", receiptData), new JProperty("password", "put_your_shared_secret_here")).ToString();
Failing to provide the shared secret will result in a 21004 status response.

This code example was also helpful to me and may help others: For C# developers there is a useful open-source project called APNS-Sharp which includes receipt verification code that works in ASP.NET. In particular, the Receipt.cs and ReceiptVerification.cs files in the Jdsoft.Apple.AppStore directory
Found it from this page about Xamarin: inapp purcasing ios Transactions and Verification

c# httpwebrequest getResponse() freezes and hangs my program

I was trying to use httpwebrequest to use a rest like service on a remote server and from the first execution itself, my code was hanging the program. Then I tried it as a console application to make sure it has nothing to do with the program itself but no luck!
string credentialsJson = #"{""username"":""test"",
""password"":""test""
}";
int tmp = ServicePointManager.DefaultConnectionLimit;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(#"https://qrua.com/qr/service" + #"/auth/login");
request.Method = "POST";
request.KeepAlive = true;
request.Timeout = 50000 ;
request.CookieContainer = new CookieContainer();
request.ContentType = "application/json";
try
{
StreamWriter writer = new StreamWriter(request.GetRequestStream());
writer.Write(credentialsJson);
}
catch (Exception e)
{
Console.WriteLine("EXCEPTION:" + e.Message);
}
//WebResponse response = request.GetResponse();
try
{
using (WebResponse response = (HttpWebResponse)request.GetResponse())
{
Console.WriteLine("request:\n" + request.ToString() + "\nresponse:\n" + response.ContentLength);
response.Close();
}
}
catch (Exception e)
{
Console.WriteLine("EXCEPTION: in sending http request:" + " \nError message:" + e.Message);
}
Tried several things from different forums but it doesnt help. Even a simple console app with the above code hangs the console indefinitely! Any help would be great..
Thanks

You're never closing the StreamWriter... so I suspect it's not being flushed. Admittedly I'd expect an error from the server instead of just a hang, but it's worth looking at.
Btw, you don't need to close the response and dispose it. Just the using statement is enough.

There's not much you can do if the remote server is not responding other than defining a Timeout and catch the exception as you did in order to inform the user that the operation cannot complete because the remote site didn't respond:
var request = (HttpWebRequest)WebRequest.Create("https://qrua.com/qr/service/auth/login");
request.Timeout = 5000;
// If the server doesn't respond within 5 seconds you might catch the timeout exception
using (var response = request.GetResponse())
{
}
If you don't want to freeze the UI you could use the async version: BeginGetResponse

Try specifying request.ContentLength.
Before doing:
StreamWriter writer = new StreamWriter(request.GetRequestStream());
writer.Write(credentialsJson);
Try something like this:
using (MemoryStream stream = new MemoryStream())
{
using (var writer = StreamWriter writer = new StreamWriter(stream))
{
writer.Write(credentialsJson);
writer.Close();
}
request.ContentLength = stream.Length;
}