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how to add body in post request c# [duplicate]

This question already has answers here:
How to post JSON to a server using C#?
(15 answers)
Closed 1 year ago.
i, tried putting body in request but didn't actually worked,
in body i want to put which is in json format {"ClaimNo":"123123"}
i have used this as code:
string ClaimStatus_url = "https:xyz";
WebRequest request = WebRequest.Create(ClaimStatus_url);
request.ContentType = "application/json";
request.Method = "POST";
//request.Headers = "";// i used this for puting body in it but did not work
WebResponse response = request.GetResponse();
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
string result = reader.ReadToEnd();

using System.Text;
using System.Text.Json;
namespace TestPostData;
public class Data
{
public int ClaimNo { get; set; }
}
public static class Program
{
public static void Main()
{
var postData = new Data
{
ClaimNo = 123123,
};
var client = new System.Net.Http.HttpClient();
var content = new StringContent(JsonSerializer.Serialize(postData), Encoding.UTF8, "application/json");
var response = client.PostAsync("https:xyz", content).Result;
}
}
That is an example of using HttpClient class that is now recommended to use instead WebRequest.

Try this, i hope it will work.
var request = (HttpWebRequest)WebRequest.Create("http://www.example.com/recepticle.aspx");
var postData = "thing1=" + Uri.EscapeDataString("hello");
postData += "&thing2=" + Uri.EscapeDataString("world");
var data = Encoding.ASCII.GetBytes(postData);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
using (var stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
var response = (HttpWebResponse)request.GetResponse();
var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();

I would start off by using RestSharp.
dotnet add package RestSharp
Then I would create a DTOS object with the contents that you want to send in the json:
public class DtosObject
{
public string ClaimNo {get; set;}
}
Then pass that in as the object (I would call the class something relevant to the data it contains). If you only are using ClaimNo you could also use a KeyValuePair like this:
var body = new KeyValuePair<string, string>("ClaimNo", "123123");
Then you can send requests like this:
public async Task<IRestResult> PostAsync(string url, object body)
{
var client = new RestClient(url);
client.Timeout = -1;
var request = new RestRequest(Method.Post);
request.AddJsonBody(body);
var response = await client.ExecuteAsync(request);
return response;
}

string ClaimStatus_url = "https://qms.xyz.in/FGClaimWsAPI/api/Common/FetchClaimdetails";
var httpWebRequest = (HttpWebRequest)WebRequest.Create(ClaimStatus_url);
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = "{\"ClaimNo\":\""+ userProfile.ClaimNumber +"\"}";
//string json = "{\"ClaimNo\":\"CV010831\"}";
//await turnContext.SendActivityAsync(MessageFactory.Text(json, json), cancellationToken);
streamWriter.Write(json);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
var result1 = "" ;
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
result1 = result.Substring(1, result.Length -2); // to bring response result in proper format
}
_claimstaus = GenrateJSON_Claim(result1);
This upper code worked

HttpWebRequest.getResponse() returning NULL

I am attempting to create a console app that sends a WebRequest to a website so that I can get some information back from it in JSON format. Once I build up the request and try to get response I just want to simply print out the data, but when I call httpWebRequest.getResponse() it returns NULL.
I have tried multiple other methods of sending the data to the the url but those are all giving me like 404, or 400 errors, etc. This method at least isn't giving me any error, just a NULL.
Here is a snapshot of the documentation I am using for the API (albeit the docs aren't complete yet):
Here is the console app code that I have right now:
try
{
var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://api.remot3.it/apv/v27/user/login");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
httpWebRequest.Headers.Add("developerkey", "***KEY***");
using (var streamWriter = new
StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = new JavaScriptSerializer().Serialize(new
{
email = "***EMAIL***",
password = "***PASSWORD***"
});
Console.WriteLine(json);
streamWriter.Write(json);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
Console.WriteLine(result);
Console.ReadLine();
}
}catch(Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine(e.StackTrace);
Console.ReadLine();
}
Expected output is some JSON data, but I am getting a NULL back from getResponse().

Try to serialize the credential in your form and for header send as parameter for this class.
Check below for my code. It is not 100 % fit to your requirement, but atleast it will help to get through your logic.
Here is what I get Json Response from this code. Its work Perfect. Please remember to add timeout option on your webrequest and at the end close the streamreader and stream after completing your task. please check this code.
public static string httpPost(string url, string json)
{
string content = "";
byte[] bs;
if (json != null && json != string.Empty)
{
bs = Encoding.UTF8.GetBytes(json);
}
else
{
bs = Encoding.UTF8.GetBytes(url);
}
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);
req.Method = "POST";
if (json != string.Empty)
req.ContentType = "application/json";
else
req.ContentType = "application/x-www-form-urlencoded";
req.KeepAlive = false;
req.Timeout = 30000;
req.ReadWriteTimeout = 30000;
//req.UserAgent = "test.net";
req.Accept = "application/json";
req.ContentLength = bs.Length;
using (Stream reqStream = req.GetRequestStream())
{
reqStream.Write(bs, 0, bs.Length);
reqStream.Flush();
reqStream.Close();
}
using (WebResponse wr = req.GetResponse())
{
Stream s = wr.GetResponseStream();
StreamReader reader = new StreamReader(s, Encoding.UTF8);
content = reader.ReadToEnd();
wr.Close();
s.Close();
reader.Close();
}
return content;
}

Why does my API POST Request keep failing?

I am doing an API Post request and cant seem to get it to work. I always get a sendFailure webexception and the response for the exception is always null so catching the exception is useless. It keeps happening when I try to get the httpWebResponse. I noticed too the request.contentlength gave errors at postream getrequeststream so i commented it out. Test.json is the file I use for the request body. I also tested this on different API testers by including the URL, body, and content-type in the header and they worked. I just cant seem to code it for myself. The credentials work I just dont know if im doing the request correctly?
JSON File:
{
"email": "abc#123.com",
"password": "12345",
"facilityNumber": "987654"
}
string filepath = "test.json";
string result = string.Empty;
using (StreamReader r = new StreamReader(filepath))
{
var json = r.ReadToEnd();
var jobj = JObject.Parse(json);
foreach (var item in jobj.Properties())
{
item.Value = item.Value.ToString().Replace("v1", "v2");
}
result = jobj.ToString();
Console.WriteLine(result);
}
try
{
string setupParameters;
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("https://www.test.com/abcde");
request.AllowAutoRedirect = true;
setupParameters = result;
ServicePointManager.ServerCertificateValidationCallback = (s, cert, chain, ssl) => true;
ASCIIEncoding encoding = new ASCIIEncoding();
var postData = setupParameters;
request.Method = "POST";
request.ContentType = "application/json";
byte[] data = encoding.GetBytes(postData);
//request.ContentLength = data.Length;
using (StreamWriter postStream = new StreamWriter(request.GetRequestStream()))//error if uncomment contentlength
{
postStream.Write(postData);
postStream.Flush();
postStream.Close();
}
HttpWebResponse wr = (HttpWebResponse)request.GetResponse();//error occurs
Stream receiveStream = wr.GetResponseStream();
StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);
}
catch (WebException ex)
{
if (ex.Response != null)
{
using (var errorResponse = (HttpWebResponse)ex.Response)
{
using (var reader = new StreamReader(errorResponse.GetResponseStream()))
{
string error = reader.ReadToEnd();
result = error;
}
}
}

I suggest modifiying your request to follow this format. Especially pay attention to the request.Method and request.ContentType which have caught me out multiple times.
Also, handling the response is easier this way.
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(YOURURL);
request.ContentType = "application/json; charset=utf8";
request.Headers.Add(ADD HEADER HERE IF YOU NEED ONE);
request.Method = WebRequestMethods.Http.Post; // IMPORTANT
using (var streamWriter = new StreamWriter(request.GetRequestStream()))
{
streamWriter.Write(JsonConvert.SerializeObject(JSONBODYSTRING));
// I USUALLY YOU JSONCONVERT HERE TO SIMPLY SERIALIZE A STRING CONTAINING THE JSON INFO.
//BUT I GUESS YOUR METHOD WOULD ALSO WORK
streamWriter.Flush();
streamWriter.Close();
}
WebResponse response = request.GetResponse();
using (var streamReader = new StreamReader(response.GetResponseStream()))
{
string result = streamReader.ReadToEnd();
// DO WHATEVER YOU'D LIKE HERE
}
} catch (Exception ex)
{
// HANDLE YOUR EXCEPTIONS
}

WP8 - Login to Website and parse HTML from answer

I want to login to this site: http://subcard.subway.co.uk/de_cardholder/JSP/login_reg.jsp
And i found out that I have to send a POST request to the server and I also know that I have to work with this POST request:
POST /de_cardholder/servlet/SPLoginServlet HTTP/1.1
Host: subcard.subway.co.uk
language=de&userID=ID&password=PASSWORD&transIdentType=1&programID=6
And after the login I want to parse the HTML data. But how can I implement the POST request on WP in C# and is it as easy as I think?

Try this,
Uri RequestUri = new Uri("subcard.subway.co.uk/de_cardholder/servlet/SPLoginServlet HTTP/1.1?language=de&userID=ID&password=PASSWORD&transIdentType=1&programID=6", UriKind.Absolute);
string PostData = "";
WebRequest webRequest;
webRequest = WebRequest.Create(RequestUri);
webRequest.Method = "POST";
webRequest.ContentType = "text/xml";
HttpWebResponse response;
string Response;
using (response = (HttpWebResponse)await webRequest.GetResponseAsync()) ;
using (Stream streamResponse = response.GetResponseStream())
using (StreamReader streamReader = new StreamReader(streamResponse))
{
Response = await streamReader.ReadToEndAsync();
}
if(Response != null)
{
//data should be available in Response
}

var postRequest = (HttpWebRequest)WebRequest.Create("your Url here");
postRequest.ContentType = "application/x-www-form-urlencoded";// you can give the type of request content here
postRequest.Method = "POST";
if you have any data to be posted along with the request as part of content and not as part of URL itself you can add this. example:- ( language=de&userID=ID&password=PASSWORD&transIdentType=1&programID=6)
using (var requestStream = await postRequest.GetRequestStreamAsync())
{
byte[] postDataArray = Encoding.UTF8.GetBytes("your request data");
await requestStream.WriteAsync(postDataArray, 0, postDataArray.Length);
}
if you do not have any data to be a send as content ignore the above code
WebResponse postResponse = await postRequest.GetResponseAsync();
if (postResponse != null)
{
var postResponseStream = postResponse.GetResponseStream();
var postStreamReader = new StreamReader(postResponseStream);
string response = await postStreamReader.ReadToEndAsync();// Result comes here
}

Google Api get token request returns invalid_request

I'm trying to get Google APi's access_token using c# and always getting error message invalid_request. There is my code:
var Params = new Dictionary<string, string>();
Params["client_id"] = GoogleApplicationAPI.CLIENT_ID;
Params["client_secret"] = GoogleApplicationAPI.CLIENT_SECRET;
Params["code"] = "4/08Z_Us0a_blkMlXihlixR1579TYu.smV5ucbI8U4VOl05ti8ZT3ZD4CgMcgI";
Params["redirect_uri"] = GoogleApplicationAPI.RETURN_URL;
Params["grant_type"] = "authorization_code";
var RequestData = "";
foreach (var Item in Params)
{
RequestData += Item.Key + "=" + HttpUtility.UrlEncode(Item.Value) + "&";
}
string Url = "https://accounts.google.com/o/oauth2/token";
var request = (HttpWebRequest) WebRequest.Create(Url);
request.Method = HttpMethod.Post.ToString();
request.ContentType = "application/x-www-form-urlencoded";
var SendData = Encoding.UTF8.GetBytes(RequestData);
try
{
request.ContentLength = SendData.Length;
Stream OutputStream = request.GetRequestStream();
OutputStream.Write(SendData, 0, SendData.Length);
} catch {}
try
{
using (var response = (HttpWebResponse) request.GetResponse())
{
var stream = response.GetResponseStream();
var sr = new StreamReader(stream);
string JSON = sr.ReadToEnd();
}
} catch {}
I use https://developers.google.com/accounts/docs/OAuth2WebServer#offline

Try removing the call to HttpUtility.UrlEncode on each item in the request data. You shouldn't need to do this as the data is not going into the url it's being POSTed. This is no doubt diluting the information being sent which is resulting in your Invalid Request response.