how to call web api in asp.net c# code behind

PP Smartwork

8y15.5k.NET

string json = "{\"clientName\":\"test12\"}";
var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://test/api/ClientID.pdo");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Accept = "application/json";
httpWebRequest.Method = "POST";
string credentials = "XYZ:XYZ";
httpWebRequest.Headers.Add("Authorization", "basic" + credentials);
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
streamWriter.Write(json);
streamWriter.Flush();
streamWriter.Close();
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
var res = new JavaScriptSerializer().Deserialize(result);
int clientID = res.clientID; //return res;
}

I am getting clientID=0.

Plz help me.

3 Replies

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Tripat Bala Singh8y ago
if you want consume web api for post method then use httpclient
and send your request as object
like this i am using your code with my stuff
using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri("http://localhost:55587/");
                client.DefaultRequestHeaders.Accept.Clear();
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                // post method
                var clientDetailsrquest = new ClientDetails() { clientId = "test12" };
                HttpResponseMessage response = await client.PostAsJsonAsync("api/ClientDetails", clientDetailsrquest);

                if (response.IsSuccessStatusCode)
                {
                    // here get the result from response
                }
            }
0
Aniket Rana8y ago
please Refer This Article ....

https://www.c-sharpcorner.com/article/calling-web-api-using-httpclient/

https://stackoverflow.com/questions/37153483/call-web-api-from-application

http://www.tutorialsteacher.com/webapi/consuming-web-api-in-dotnet-using-httpclient
0
Dharmraj Thakur8y ago
You can with below code...
using (HttpClientHandler httpClientHandler = new HttpClientHandler())
{
    using (HttpClient client = new HttpClient(httpClientHandler))
    {
        //set timeout
        client.Timeout = new TimeSpan(0, 0, 0, 0, -1);

        //add headers
        client.DefaultRequestHeaders.Accept.Clear();

        //set content type
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        //you can add any customized header also
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes(string.Format("{0}:{1}", "your_username", "your_password"))));
        var request = new HttpRequestMessage(HttpMethod.Post, "http://www.your-url.com");
        string jsonString = JsonConvert.SerializeObject(reqData);
        var jsoncontent = new StringContent(jsonString, Encoding.UTF8, "application/json");
        request.Content = jsoncontent;
        var response = await client.SendAsync(request).ConfigureAwait(false);

        //on ok response
        if (response.IsSuccessStatusCode)
        {
            string jsonres = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
            reqData.Authorization = client.DefaultRequestHeaders.Authorization.ToString();

            return new
            {
                requestJson = reqData,
                responseJson = JsonConvert.DeserializeObject(jsonres)
            };
        }
    }
}
0