Answers for "httpclient example c#"

httpclient c# sample

// HttpClient is intended to be instantiated once per application, rather than per-use. See Remarks.
static readonly HttpClient client = new HttpClient();

static async Task Main()
{
  // Call asynchronous network methods in a try/catch block to handle exceptions.
  try	
  {
     HttpResponseMessage response = await client.GetAsync("http://www.contoso.com/");
     response.EnsureSuccessStatusCode();
     string responseBody = await response.Content.ReadAsStringAsync();
     // Above three lines can be replaced with new helper method below
     // string responseBody = await client.GetStringAsync(uri);

     Console.WriteLine(responseBody);
  }
  catch(HttpRequestException e)
  {
     Console.WriteLine("nException Caught!");	
     Console.WriteLine("Message :{0} ",e.Message);
  }
}

example HttpClient c# Post

//Base code from: http://zetcode.com/csharp/httpclient/
public async string Example() 
{
  	//The data that needs to be sent. Any object works.
	var pocoObject = new 
	{
	  	Name = "John Doe",
		Occupation = "gardener"
	};

  	//Converting the object to a json string. NOTE: Make sure the object doesn't contain circular references.
	string json = JsonConvert.SerializeObject(pocoObject);
  	
  	//Needed to setup the body of the request
	StringContent data = new StringContent(json, Encoding.UTF8, "application/json");

  	//The url to post to.
	var url = "https://httpbin.org/post";
	var client = new HttpClient();

  	//Pass in the full URL and the json string content
	var response = await client.PostAsync(url, data);

  	//It would be better to make sure this request actually made it through
	string result = await response.Content.ReadAsStringAsync();
  	
  	//close out the client
  	client.Dispose();
  
	return result;
}

c# getasync response

async Task<string> GetResponseString(string text)
{
    var httpClient = new HttpClient();

    var parameters = new Dictionary<string, string>();
    parameters["text"] = text;

    var response = await httpClient.PostAsync(BaseUri, new FormUrlEncodedContent(parameters));
    var contents = await response.Content.ReadAsStringAsync();

    return contents;
}

var finalResult = await GetResponseString(text);

httpclient C#

//example code
//var lst = await service.ConnectHttpClient<User, List<User>>("api/User/GetUserInfoByUserId", new User() { UserId = 1 });
//var lst = await service.ConnectRestClient<User, List<User>>("api/User/GetUserInfoByUserId", new User() { UserId = 1 });

public async Task<M> ConnectHttpClient<R, M>(string apiUrl, R reqModel)
{
    M model = default(M);

    HttpClient client = new HttpClient();
    client.BaseAddress = new Uri(baseUrl);
    client.DefaultRequestHeaders.Accept.Clear();
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    HttpResponseMessage response = await client.PostAsJsonAsync(apiUrl, reqModel);
    if (response.IsSuccessStatusCode)
    {
        var res = response.Content.ReadAsStringAsync().Result;
        model = JsonConvert.DeserializeObject<M>(res);
    }
    return model;
}

public async Task<M> ConnectRestClient<R, M>(string apiUrl, R reqModel)
{
    M model = default(M);

    RestClient restClient = new RestClient(baseUrl);
    RestRequest restRequest = new RestRequest(apiUrl, Method.POST, DataFormat.Json);
    restRequest.AddJsonBody(reqModel);
    IRestResponse restResponse = await restClient.ExecuteAsync(restRequest);
    if (restResponse.IsSuccessful)
    {
        string response = restResponse.Content;
        model = JsonConvert.DeserializeObject<M>(response);
    }
    return model;
}

c# webclient vs httpclient

public class AHNData
{
    public int i;
    public string str;
}

public class Program
{
    public static HttpClient httpClient = new HttpClient();
    private static readonly string _url = "http://localhost:9000/api/values/";

    public static void Main(string[] args)
    {
       #region "Trace"
       Trace.Listeners.Clear();

       TextWriterTraceListener twtl = new TextWriterTraceListener(
           "C:\Temp\REST_Test.txt");
       twtl.Name = "TextLogger";
       twtl.TraceOutputOptions = TraceOptions.ThreadId | TraceOptions.DateTime;

       ConsoleTraceListener ctl = new ConsoleTraceListener(false);
       ctl.TraceOutputOptions = TraceOptions.DateTime;

       Trace.Listeners.Add(twtl);
       Trace.Listeners.Add(ctl);
       Trace.AutoFlush = true;
       #endregion

       int batchSize = 1000;

       ParallelOptions parallelOptions = new ParallelOptions();
       parallelOptions.MaxDegreeOfParallelism = batchSize;

       ServicePointManager.DefaultConnectionLimit = 1000000;

       Parallel.For(0, batchSize, parallelOptions,
           j =>
           {
               Stopwatch sw1 = Stopwatch.StartNew();
               GetDataFromHttpClientAsync<List<AHNData>>(sw1);
           });
       Parallel.For(0, batchSize, parallelOptions,
            j =>
            {
                Stopwatch sw1 = Stopwatch.StartNew();
                GetDataFromHttpClientSync<List<AHNData>>(sw1);
            });
       Parallel.For(0, batchSize, parallelOptions,
            j =>
            {
                using (WebClient client = new WebClient())
                {
                   Stopwatch sw = Stopwatch.StartNew();
                   byte[] arr = client.DownloadData(_url);
                   sw.Stop();

                   Trace.WriteLine("WebClient Sync " + sw.ElapsedMilliseconds);
                }
           });

           Console.Read();
        }

        public static T GetDataFromWebClient<T>()
        {
            using (var webClient = new WebClient())
            {
                webClient.BaseAddress = _url;
                return JsonConvert.DeserializeObject<T>(
                    webClient.DownloadString(_url));
            }
        }

        public static void GetDataFromHttpClientSync<T>(Stopwatch sw)
        {
            HttpClient httpClient = new HttpClient();
            var response = httpClient.GetAsync(_url).Result;
            var obj = JsonConvert.DeserializeObject<T>(
                response.Content.ReadAsStringAsync().Result);
            sw.Stop();

            Trace.WriteLine("HttpClient Sync " + sw.ElapsedMilliseconds);
        }

        public static void GetDataFromHttpClientAsync<T>(Stopwatch sw)
        {
           HttpClient httpClient = new HttpClient();
           var response = httpClient.GetAsync(_url).ContinueWith(
              (a) => {
                 JsonConvert.DeserializeObject<T>(
                    a.Result.Content.ReadAsStringAsync().Result);
                 sw.Stop();
                 Trace.WriteLine("HttpClient Async " + sw.ElapsedMilliseconds);
              }, TaskContinuationOptions.None);
        }
    }
}