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Webrequest c# API null once reached the API

I am trying to send a request from server side to my API, here is my code from Server
var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:59606/api/values/UserCheck");
httpWebRequest.ContentType = "application/json; charset=utf-8";
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = "{\"username\":\"User\"," +
"\"password\":\"Mypassword\"," +
"\"logonfrom\":\"DOMAIN\\DomainName\"}";
streamWriter.Write(json);
streamWriter.Flush();
streamWriter.Close();
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
Console.WriteLine(result);
Console.ReadLine();
}
May API code are below:
[HttpPost]
[ActionName("UserCheck")]
public bool UserCheck([FromBody]User value)
{
ContextType CT = ContextType.Domain;
if (value.logonfrom.Split('\\')[0] == "DOMAIN")
{
CT = ContextType.Domain;
}else if(value.logonfrom.Split('\\')[0] == "MACHINE")
{
CT = ContextType.Machine;
}else
{
return false;
}
return CheckCredentials(value.username, value.password, CT,value.logonfrom.Split('\\')[1]);
}
when my request reach the Action of UserCheck, the value of
([FromBody]User value)
is null
my Class for the User is below
public class User
{
public string username { get; set; }
public string password { get; set; }
public string system { get; set; }
public string IP { get; set; }
public string logonfrom { get; set; }
}
BUT once i remove the logonfrom variable from json there is no error, i mean the parameter (value) successfully captures the content i sent.
Thanks

use the following peace of code.
string json = JsonConvert.SerializeObject(new { username = "afsa", password = "fsaf", system = "fsaf", ip = "fsf", logonfrom ="fsfsd"});

How to get data from json api with c# using httpwebrequest?

I want to get all variables from https://api.coinmarketcap.com/v1/ticker/ in my c# console application.
How can I do this?
I started with getting the whole page as a stream. What to do now?
private static void start_get()
{
HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create
(string.Format("https://api.coinmarketcap.com/v1/ticker/"));
WebReq.Method = "GET";
HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();
Console.WriteLine(WebResp.StatusCode);
Console.WriteLine(WebResp.Server);
Stream Answer = WebResp.GetResponseStream();
StreamReader _Answer = new StreamReader(Answer);
Console.WriteLine(_Answer.ReadToEnd());
}

First you need a custom class to use for deserialization:
public class Item
{
public string id { get; set; }
public string name { get; set; }
public string symbol { get; set; }
public string rank { get; set; }
public string price_usd { get; set; }
[JsonProperty(PropertyName = "24h_volume_usd")] //since in c# variable names cannot begin with a number, you will need to use an alternate name to deserialize
public string volume_usd_24h { get; set; }
public string market_cap_usd { get; set; }
public string available_supply { get; set; }
public string total_supply { get; set; }
public string percent_change_1h { get; set; }
public string percent_change_24h { get; set; }
public string percent_change_7d { get; set; }
public string last_updated { get; set; }
}
Next, you can use Newtonsoft Json, a free JSON serialization and deserialization framework in the following way to get your items (include the following using statements):
using System.Net;
using System.IO;
using Newtonsoft.Json;
private static void start_get()
{
HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create(string.Format("https://api.coinmarketcap.com/v1/ticker/"));
WebReq.Method = "GET";
HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();
Console.WriteLine(WebResp.StatusCode);
Console.WriteLine(WebResp.Server);
string jsonString;
using (Stream stream = WebResp.GetResponseStream()) //modified from your code since the using statement disposes the stream automatically when done
{
StreamReader reader = new StreamReader(stream, System.Text.Encoding.UTF8);
jsonString = reader.ReadToEnd();
}
List<Item> items = JsonConvert.DeserializeObject<List<Item>>(jsonString);
Console.WriteLine(items.Count); //returns 921, the number of items on that page
}
Finally, the list of elements is stored in items.

A simplified version of Keyur PATEL's work.
static void GetCoinValues()
{
string json = new WebClient().DownloadString("https://api.coinmarketcap.com/v1/ticker/");
List<Item> items = JsonConvert.DeserializeObject<List<Item>>(json);
foreach (var item in items)
{
Console.WriteLine("ID: " + item.id.ToUpper());
Console.WriteLine("Name: " + item.name.ToUpper());
Console.WriteLine("Symbol: " + item.symbol.ToUpper());
Console.WriteLine("Rank: " + item.rank.ToUpper());
Console.WriteLine("Price (USD): " + item.price_usd.ToUpper());
Console.WriteLine("\n");
}
}

Show json error tag in C#

I have a json in an Api with an error tag. Now I want to show the error content in c# when an error occurs. Does anyone have a code or an example for this?
--Edited--
string html = string.Empty;
string url = #"http://henn.worteus.eu/?tag=getdatas&token=21123&id=" + sessions;
WebRequest req = WebRequest.Create(url);
req.ContentType = "application/json";
WebResponse resp = req.GetResponse();
Stream stream = resp.GetResponseStream();
StreamReader re = new StreamReader(stream);
string json = re.ReadToEnd();
// Wrapper w = (Wrapper)new JavaScriptSerializer().Deserialize(json, typeof(Wrapper));
Wrapper w = (Wrapper)JsonConvert.DeserializeObject(json, typeof(Wrapper));
dataGrid.ItemsSource = w.data;
Here are the data models
public class Data
{
public string Skala { get; set; }
public string Wert { get; set; }
public string Bereich { get; set; }
public string Interpretationen { get; set; }
}
public class Wrapper
{
public List<Data> data { get; set; }
public string tag { get; set; }
public object error { get; set; }
}

If there is an error property on the returned model
{
"error":"...",
"data":[...]
}
then desrialize the json to a strong type and then access the property
Wrapper w = JsonConvert.DeserializeObject<Wrapper>(json);
var data = w.data;
var error = w.error;
if(error != null) {
//...perform some action
}

While trying to upload video using daily motion API i got this error "The request was aborted: The request was canceled."

i am using daily motion API for uploading videos from my application but when try to upload more than 2 MB sized video i get this error "The request was aborted: The request was canceled." and this error invoked by this line of code var responseBytes = client.UploadFile(uploadUrl, fileToUpload);
and this is my code which i am using to upload video
public static void Main(MyVideo video)
{
var accessToken = GetAccessToken();
Authorize(accessToken);
var fileToUpload = video.Path;
var uploadUrl = GetFileUploadUrl(accessToken);
var response = GetFileUploadResponse(fileToUpload, accessToken, uploadUrl);
var uploadedResponse = PublishVideo(response, accessToken);
}
public class UploadResponse
{
public string format { get; set; }
public string acodec { get; set; }
public string vcodec { get; set; }
public int duration { get; set; }
public int bitrate { get; set; }
public string dimension { get; set; }
public string name { get; set; }
public int size { get; set; }
public string url { get; set; }
public string hash { get; set; }
public string seal { get; set; }
public override string ToString()
{
var flags = System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.FlattenHierarchy;
System.Reflection.PropertyInfo[] infos = this.GetType().GetProperties(flags);
StringBuilder sb = new StringBuilder();
string typeName = this.GetType().Name;
sb.AppendLine(typeName);
sb.AppendLine(string.Empty.PadRight(typeName.Length + 5, '='));
foreach (var info in infos)
{
object value = info.GetValue(this, null);
sb.AppendFormat("{0}: {1}{2}", info.Name, value != null ? value : "null", Environment.NewLine);
}
return sb.ToString();
}
}
private static UploadResponse GetFileUploadResponse(string fileToUpload, string accessToken, string uploadUrl)
{
// ServicePointManager.DefaultConnectionLimit = 900000;
//HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(uploadUrl);
//wr.KeepAlive = false;
//wr.Timeout = System.Threading.Timeout.Infinite;
//wr.ProtocolVersion = HttpVersion.Version10;
var client = new WebClient();
client.Headers.Add("Authorization", "OAuth " + accessToken);
var responseBytes = client.UploadFile(uploadUrl, fileToUpload);
var responseString = Encoding.UTF8.GetString(responseBytes);
var response = JsonConvert.DeserializeObject<UploadResponse>(responseString);
return response;
}
and i have already tried al the possible solutionsu provided on Stackoverflow earlier also done with http execution time and we client time out but not working please someone help me

Get user location by IP address [closed]

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I have an ASP.NET website written in C#.
On this site I need to automatically show a start page based on the user's location.
Can I get name of user's city based on the IP address of the user ?

You need an IP-address-based reverse geocoding API... like the one from ipdata.co. I'm sure there are plenty of options available.
You may want to allow the user to override this, however. For example, they could be on a corporate VPN which makes the IP address look like it's in a different country.

Use http://ipinfo.io , You need to pay them if you make more than 1000 requests per day.
The code below requires the Json.NET package.
public static string GetUserCountryByIp(string ip)
{
IpInfo ipInfo = new IpInfo();
try
{
string info = new WebClient().DownloadString("http://ipinfo.io/" + ip);
ipInfo = JsonConvert.DeserializeObject<IpInfo>(info);
RegionInfo myRI1 = new RegionInfo(ipInfo.Country);
ipInfo.Country = myRI1.EnglishName;
}
catch (Exception)
{
ipInfo.Country = null;
}
return ipInfo.Country;
}
And the IpInfo Class I used:
public class IpInfo
{
[JsonProperty("ip")]
public string Ip { get; set; }
[JsonProperty("hostname")]
public string Hostname { get; set; }
[JsonProperty("city")]
public string City { get; set; }
[JsonProperty("region")]
public string Region { get; set; }
[JsonProperty("country")]
public string Country { get; set; }
[JsonProperty("loc")]
public string Loc { get; set; }
[JsonProperty("org")]
public string Org { get; set; }
[JsonProperty("postal")]
public string Postal { get; set; }
}

Following Code work for me.
Update:
As I am calling a free API request (json base ) IpStack.
public static string CityStateCountByIp(string IP)
{
//var url = "http://freegeoip.net/json/" + IP;
//var url = "http://freegeoip.net/json/" + IP;
string url = "http://api.ipstack.com/" + IP + "?access_key=[KEY]";
var request = System.Net.WebRequest.Create(url);
using (WebResponse wrs = request.GetResponse())
{
using (Stream stream = wrs.GetResponseStream())
{
using (StreamReader reader = new StreamReader(stream))
{
string json = reader.ReadToEnd();
var obj = JObject.Parse(json);
string City = (string)obj["city"];
string Country = (string)obj["region_name"];
string CountryCode = (string)obj["country_code"];
return (CountryCode + " - " + Country +"," + City);
}}}
return "";
}
Edit :
First, it was http://freegeoip.net/ now it's https://ipstack.com/ (and maybe now it's a paid service- Free Up to 10,000 request/month)

IPInfoDB has an API that you can call in order to find a location based on an IP address.
For "City Precision", you call it like this (you'll need to register to get a free API key):
http://api.ipinfodb.com/v2/ip_query.php?key=<your_api_key>&ip=74.125.45.100&timezone=false
Here's an example in both VB and C# that shows how to call the API.

I have tried using http://ipinfo.io and this JSON API works perfectly. First, you need to add the below mentioned namespaces:
using System.Linq;
using System.Web;
using System.Web.UI.WebControls;
using System.Net;
using System.IO;
using System.Xml;
using System.Collections.Specialized;
For localhost it will give dummy data as AU. You can try hardcoding your IP and get results:
namespace WebApplication4
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string VisitorsIPAddr = string.Empty;
//Users IP Address.
if (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
{
//To get the IP address of the machine and not the proxy
VisitorsIPAddr = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
}
else if (HttpContext.Current.Request.UserHostAddress.Length != 0)
{
VisitorsIPAddr = HttpContext.Current.Request.UserHostAddress;`enter code here`
}
string res = "http://ipinfo.io/" + VisitorsIPAddr + "/city";
string ipResponse = IPRequestHelper(res);
}
public string IPRequestHelper(string url)
{
string checkURL = url;
HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse();
StreamReader responseStream = new StreamReader(objResponse.GetResponseStream());
string responseRead = responseStream.ReadToEnd();
responseRead = responseRead.Replace("\n", String.Empty);
responseStream.Close();
responseStream.Dispose();
return responseRead;
}
}
}

I was able to achieve this in ASP.NET MVC using the client IP address and freegeoip.net API. freegeoip.net is free and does not require any license.
Below is the sample code I used.
String UserIP = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (string.IsNullOrEmpty(UserIP))
{
UserIP = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}
string url = "http://freegeoip.net/json/" + UserIP.ToString();
WebClient client = new WebClient();
string jsonstring = client.DownloadString(url);
dynamic dynObj = JsonConvert.DeserializeObject(jsonstring);
System.Web.HttpContext.Current.Session["UserCountryCode"] = dynObj.country_code;
You can go through this post for more details.Hope it helps!

Using the Request of following web site
http://ip-api.com/
Following is C# code for returning Country and Country Code
public string GetCountryByIP(string ipAddress)
{
string strReturnVal;
string ipResponse = IPRequestHelper("http://ip-api.com/xml/" + ipAddress);
//return ipResponse;
XmlDocument ipInfoXML = new XmlDocument();
ipInfoXML.LoadXml(ipResponse);
XmlNodeList responseXML = ipInfoXML.GetElementsByTagName("query");
NameValueCollection dataXML = new NameValueCollection();
dataXML.Add(responseXML.Item(0).ChildNodes[2].InnerText, responseXML.Item(0).ChildNodes[2].Value);
strReturnVal = responseXML.Item(0).ChildNodes[1].InnerText.ToString(); // Contry
strReturnVal += "(" +
responseXML.Item(0).ChildNodes[2].InnerText.ToString() + ")"; // Contry Code
return strReturnVal;
}
And following is Helper for requesting url.
public string IPRequestHelper(string url) {
HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse();
StreamReader responseStream = new StreamReader(objResponse.GetResponseStream());
string responseRead = responseStream.ReadToEnd();
responseStream.Close();
responseStream.Dispose();
return responseRead;
}

What you need is called a "geo-IP database". Most of them cost some money (albeit not too expensive), especially fairly precise ones. One of the most widely used is MaxMind's database. They have a fairly good free version of IP-to-city database called GeoLity City - it has lots of restrictions, but if you can cope with that that would be probably your best choice, unless you have some money to spare for a subscription to more accurate product.
And, yeah, they do have a C# API to query geo-IP databases available.

You'll probably have to use an external API, most of which cost money.
I did find this though, seems to be free: http://hostip.info/use.html

Return country
static public string GetCountry()
{
return new WebClient().DownloadString("http://api.hostip.info/country.php");
}
Usage:
Console.WriteLine(GetCountry()); // will return short code for your country
Return info
static public string GetInfo()
{
return new WebClient().DownloadString("http://api.hostip.info/get_json.php");
}
Usage:
Console.WriteLine(GetInfo());
// Example:
// {
// "country_name":"COUNTRY NAME",
// "country_code":"COUNTRY CODE",
// "city":"City",
// "ip":"XX.XXX.XX.XXX"
// }

It's good sample for you:
public class IpProperties
{
public string Status { get; set; }
public string Country { get; set; }
public string CountryCode { get; set; }
public string Region { get; set; }
public string RegionName { get; set; }
public string City { get; set; }
public string Zip { get; set; }
public string Lat { get; set; }
public string Lon { get; set; }
public string TimeZone { get; set; }
public string ISP { get; set; }
public string ORG { get; set; }
public string AS { get; set; }
public string Query { get; set; }
}
public string IPRequestHelper(string url)
{
HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse();
StreamReader responseStream = new StreamReader(objResponse.GetResponseStream());
string responseRead = responseStream.ReadToEnd();
responseStream.Close();
responseStream.Dispose();
return responseRead;
}
public IpProperties GetCountryByIP(string ipAddress)
{
string ipResponse = IPRequestHelper("http://ip-api.com/xml/" + ipAddress);
using (TextReader sr = new StringReader(ipResponse))
{
using (System.Data.DataSet dataBase = new System.Data.DataSet())
{
IpProperties ipProperties = new IpProperties();
dataBase.ReadXml(sr);
ipProperties.Status = dataBase.Tables[0].Rows[0][0].ToString();
ipProperties.Country = dataBase.Tables[0].Rows[0][1].ToString();
ipProperties.CountryCode = dataBase.Tables[0].Rows[0][2].ToString();
ipProperties.Region = dataBase.Tables[0].Rows[0][3].ToString();
ipProperties.RegionName = dataBase.Tables[0].Rows[0][4].ToString();
ipProperties.City = dataBase.Tables[0].Rows[0][5].ToString();
ipProperties.Zip = dataBase.Tables[0].Rows[0][6].ToString();
ipProperties.Lat = dataBase.Tables[0].Rows[0][7].ToString();
ipProperties.Lon = dataBase.Tables[0].Rows[0][8].ToString();
ipProperties.TimeZone = dataBase.Tables[0].Rows[0][9].ToString();
ipProperties.ISP = dataBase.Tables[0].Rows[0][10].ToString();
ipProperties.ORG = dataBase.Tables[0].Rows[0][11].ToString();
ipProperties.AS = dataBase.Tables[0].Rows[0][12].ToString();
ipProperties.Query = dataBase.Tables[0].Rows[0][13].ToString();
return ipProperties;
}
}
}
And test:
var ipResponse = GetCountryByIP("your ip address or domain name :)");

An Alternative to using an API is to use HTML 5 location Navigator to query the browser about the User location. I was looking for a similar approach as in the subject question but I found that HTML 5 Navigator works better and cheaper for my situation. Please consider that your scinario might be different.
To get the User position using Html5 is very easy:
function getLocation()
{
if (navigator.geolocation)
{
navigator.geolocation.getCurrentPosition(showPosition);
}
else
{
console.log("Geolocation is not supported by this browser.");
}
}
function showPosition(position)
{
console.log("Latitude: " + position.coords.latitude +
"<br>Longitude: " + position.coords.longitude);
}
Try it yourself on W3Schools Geolocation Tutorial

public static string GetLocationIPAPI(string ipaddress)
{
try
{
IPDataIPAPI ipInfo = new IPDataIPAPI();
string strResponse = new WebClient().DownloadString("http://ip-api.com/json/" + ipaddress);
if (strResponse == null || strResponse == "") return "";
ipInfo = JsonConvert.DeserializeObject<IPDataIPAPI>(strResponse);
if (ipInfo == null || ipInfo.status.ToLower().Trim() == "fail") return "";
else return ipInfo.city + "; " + ipInfo.regionName + "; " + ipInfo.country + "; " + ipInfo.countryCode;
}
catch (Exception)
{
return "";
}
}
public class IPDataIPINFO
{
public string ip { get; set; }
public string city { get; set; }
public string region { get; set; }
public string country { get; set; }
public string loc { get; set; }
public string postal { get; set; }
public int org { get; set; }
}
==========================
public static string GetLocationIPINFO(string ipaddress)
{
try
{
IPDataIPINFO ipInfo = new IPDataIPINFO();
string strResponse = new WebClient().DownloadString("http://ipinfo.io/" + ipaddress);
if (strResponse == null || strResponse == "") return "";
ipInfo = JsonConvert.DeserializeObject<IPDataIPINFO>(strResponse);
if (ipInfo == null || ipInfo.ip == null || ipInfo.ip == "") return "";
else return ipInfo.city + "; " + ipInfo.region + "; " + ipInfo.country + "; " + ipInfo.postal;
}
catch (Exception)
{
return "";
}
}
public class IPDataIPAPI
{
public string status { get; set; }
public string country { get; set; }
public string countryCode { get; set; }
public string region { get; set; }
public string regionName { get; set; }
public string city { get; set; }
public string zip { get; set; }
public string lat { get; set; }
public string lon { get; set; }
public string timezone { get; set; }
public string isp { get; set; }
public string org { get; set; }
public string #as { get; set; }
public string query { get; set; }
}
==============================
private static string GetLocationIPSTACK(string ipaddress)
{
try
{
IPDataIPSTACK ipInfo = new IPDataIPSTACK();
string strResponse = new WebClient().DownloadString("http://api.ipstack.com/" + ipaddress + "?access_key=XX384X1XX028XX1X66XXX4X04XXXX98X");
if (strResponse == null || strResponse == "") return "";
ipInfo = JsonConvert.DeserializeObject<IPDataIPSTACK>(strResponse);
if (ipInfo == null || ipInfo.ip == null || ipInfo.ip == "") return "";
else return ipInfo.city + "; " + ipInfo.region_name + "; " + ipInfo.country_name + "; " + ipInfo.zip;
}
catch (Exception)
{
return "";
}
}
public class IPDataIPSTACK
{
public string ip { get; set; }
public int city { get; set; }
public string region_code { get; set; }
public string region_name { get; set; }
public string country_code { get; set; }
public string country_name { get; set; }
public string zip { get; set; }
}