C# post API method error handling

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in the below code if status is 200 then it is ok else it redirects to catch method so that i cannot fetch the error detail response on api.

On this line

var response = client.UploadString(webApiUrl, serialisedData);

it redirects to catch method if status of api is not 200.

public object postWebApi(object data, Uri webApiUrl, string id, string password)
       {
           // Create a WebClient to POST the request
           WebClient client = new WebClient();
           client.Encoding = Encoding.UTF8;

           // Set the header so it knows we are sending JSON
           client.Headers[HttpRequestHeader.ContentType] = "application/json";

           // Serialise the data we are sending in to JSON
           string serialisedData = JsonConvert.SerializeObject(data);

           string auth = string.Format("{0}:{1}", id, password);
           string enc = Convert.ToBase64String(Encoding.ASCII.GetBytes(auth));
           string cred = string.Format("{0} {1}", "Basic", enc);

           client.Headers[HttpRequestHeader.Authorization] = cred;
           // Make the request
           var response = client.UploadString(webApiUrl, serialisedData);

           // Deserialise the response into a GUID
           return JsonConvert.DeserializeObject(response);
       }

What I have tried:

Please help in case of successful it is fine if the status of response is 400 or other could not read the respnse of api.

Posted 9-Jul-18 20:45pm

User 10734264

Updated 9-Jul-18 21:22pm

v4

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Comments

Kornfeld Eliyahu Peter 10-Jul-18 3:02am

If there were no exception the only way to go is to look into the response... It is a string that came from the server as-is... Unfortunately there is no standard for that, but it will probably contain a HTTP response code... Do some debugging with different URI and data...

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User 10734264 · Accepted Answer · 2018-07-09T21:23:00

var response = string.Empty;
            try
            {
                response = client.UploadString(webApiUrl, serialisedData);
            }
            catch (WebException ex)
            {
                if (ex.Response != null)
                {
                    response = new StreamReader(ex.Response.GetResponseStream()).ReadToEnd();
                }
            }

If exception is found then we will get the response.