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Basic C# example not working.

Forum|Forum|4 years ago
February 17, 2022
9 replies
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Hello, first time user here. I'm trying to test the most basic code sample for C# but it isn't working and it's throwing a very vague exception. Code and exception below. I replaced the sensitive variables with comments describing what they had been set to.

using System;
using System.Threading.Tasks;
using RingCentral;
using DotNetEnv;

namespace Call_Ringout
{
    class Program
    {
        static RestClient restClient;
        static void Main(string[] args)
        {
            restClient = new RestClient(
                /*Client ID*/,
                /*Client Secret*/,
                "https://platform.devtest.ringcentral.com");
            restClient.Authorize(
                /*Username*/,
                /*Extension*/,
                /*Password*/;
            call_ringout().Wait();
        }

        static private async Task call_ringout()
        {
            var parameters = new MakeRingOutRequest();
            parameters.from = new MakeRingOutCallerInfoRequestFrom
            {
                phoneNumber = /*From Number*/
            };
            parameters.to = new MakeRingOutCallerInfoRequestTo
            {
                phoneNumber = /*To Number*/
            };
            parameters.callerId = new MakeRingOutCallerInfoRequestTo
            {
                phoneNumber = /From Number/
            };
            parameters.country = new MakeRingOutCoutryInfo
            {
                id = "1"
            };
            parameters.playPrompt = false;
            //var resp = await restClient.Restapi().Account().Extension().RingOut().Post(parameters);
            //Console.WriteLine("Call Placed. Call status" + resp.status.callStatus);

            var _1 = restClient.Restapi();
            var _2 = _1.Account();
            var _3 = _2.Extension();
            var _4 = _3.RingOut();
            try
            {
                var resp = await _4.Post(parameters);
                Console.WriteLine("Call Placed. Call status" + resp.status.callStatus);
            }
            catch(Exception e)
            {
                Console.WriteLine(e.InnerException);
                Console.WriteLine(e.Message);
                Console.WriteLine(e.ToString());
            }
        }
    }
}

I broke up the line

var resp = await restClient.Restapi().Account().Extension().RingOut().Post(parameters);

Into its component parts to see where the problem is. It is in the last part, which is why I put the try block around it alone.

Here is the error I'm getting:

Object reference not set to an instance of an object.
System.NullReferenceException: Object reference not set to an instance of an object.
   at RingCentral.RestClient.Request(HttpRequestMessage httpRequestMessage, Int32 retriedTimes, Nullable`1 cancellationToken)
   at RingCentral.RestClient.Request(HttpMethod httpMethod, String endpoint, Object content, Object queryParams, Nullable`1 cancellationToken)
   at RingCentral.RestClient.Request[T](HttpMethod httpMethod, String endpoint, Object content, Object queryParams, Nullable`1 cancellationToken)
   at RingCentral.RestClient.Post[T](String endpoint, Object content, Object queryParams, Nullable`1 cancellationToken)
   at RingCentral.Paths.Restapi.Account.Extension.RingOut.Index.Post(MakeRingOutRequest makeRingOutRequest, Nullable`1 cancellationToken)
   at Call_Ringout.Program.call_ringout() in C:Userswscheffeysource
eposCall_RingoutCall_RingoutProgram.cs:line 55

C:Program Filesdotnetdotnet.exe (process 28572) exited with code 0.
To automatically close the console when debugging stops, enable Tools->Options->Debugging->Automatically close the console when debugging stops.
Press any key to close this window . . .

Any help greatly appreciated.

J

jjones-2

Participating Frequently

I am having the same issue when doing a calllog, has anybody found a solution to this ?

PhongVu

Community Manager

I don't see how you create the query params so I cannot say what could be wrong. But get the latest .NET SDK and try this code.

using System;
using System.IO;
using System.Threading.Tasks;
using System.Collections.Generic;
using RingCentral;
using Newtonsoft.Json
namespace Read_User_CallLog
{
  class Program
  {
    static RestClient restClient;
    static void Main(string[] args)
    {
      try
      {
        DotEnv.Load();
        // Instantiate the SDK
        restClient = new RestClient(
                "RC_CLIENT_ID",
                "RC_CLIENT_SECRET",
                "RC_SERVER_URL");

        // Authenticate a user using a personal JWT token
        await restClient.Authorize( "RC_JWT" );

        await read_user_calllog();
      }
      catch (Exception ex)
      {
        Console.WriteLine(ex.Message);
      }
    }
    /*
    * Read user call log between a period of time
    */
    static private async Task read_user_calllog()
    {
      try
      {
        var queryParams = new ReadUserCallLogParameters();
        queryParams.dateFrom = "2024-01-01T00:00:00.000Z";
        queryParams.dateTo = "2024-01-31T23:59:59.009Z";
        queryParams.view = "Detailed";

        var resp = await restClient.Restapi().Account().Extension().CallLog().List(queryParams);
        foreach (CallLogRecord record in resp.records)
        {
          Console.WriteLine(JsonConvert.SerializeObject(record, Formatting.Indented));
        }
      }
      catch (Exception ex)
      {
        Console.WriteLine("Cannot read user call log data. " + ex.Message);
      }
    }
  }
}

J

jjones-2

Participating Frequently

using Newtonsoft.Json;
using RingCentral;
using System;
using System.Threading.Tasks;

namespace Read_User_CallLog
{
    class Program
    {
        static RestClient restClient;
        static async Task Main(string[] args)
        {
            try
            {
                // Instantiate the SDK
                RestClient restClient = new RestClient(
                    "<myclientid>",
                    "<mysecret>",
                    "https://dummy.com"
                );
                // Authenticate a user using a personal JWT token
                // I have to use ConfigureAwait instead of wait cause it will 
                //just never return with wait.

                restClient.Authorize("<MyJWT>").ConfigureAwait(false);
                await read_user_calllog(
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
        
        static private async Task read_user_calllog()
        {
            try
            {
                var queryParams = new ReadUserCallLogParameters();
                queryParams.dateFrom = "2024-01-01T00:00:00.000Z";
                queryParams.dateTo = "2024-01-31T23:59:59.009Z";
                queryParams.view = "Detailed";

                var resp = await restClient.Restapi().Account().Extension().CallLog().List(queryParams);

                foreach (CallLogRecord record in resp.records)
                {
                    Console.WriteLine(JsonConvert.SerializeObject(record, Formatting.Indented));
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("Cannot read user call log data. " + ex.Message);
            }
        }
    }
}

Thank you for replying. My code was in a .net API. I changed it to a console app but still getting the same issue, any help would be welcome.

PhongVu

Community Manager

You declared the static RestClient restClient in your class, then you declare a local restClient????

// Instantiate the SDK
RestClient restClient = new RestClient(
                    "<myclientid>",
                    "<mysecret>",
                    "https://dummy.com"
             );

Remove it!

// Instantiate the SDK
restClient = new RestClient(
                    "<myclientid>",
                    "<mysecret>",
                    "https://dummy.com"
            );

J

jjones-2

Participating Frequently

I still get the same error message

class Program
{
    static RestClient restClient = new RestClient(
          "<myclientid>",
                    "<mysecret>",
                    "https://dummy.com"
    );
    static async Task Main(string[] args)
    {
        try
        {
            // Authenticate a user using a personal JWT token
             restClient.Authorize("<MyJWT>").ConfigureAwait(false);

            await read_user_calllog();
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
    /*
     * Read user call log between a period of time
     */
    static private async Task read_user_calllog()
    {
        try
        {
            var queryParams = new ReadUserCallLogParameters();
            queryParams.dateFrom = "2024-01-01T00:00:00.000Z";
            queryParams.dateTo = "2024-01-31T23:59:59.009Z";
            queryParams.view = "Detailed";

            var resp = await restClient.Restapi().Account().Extension().CallLog().List(queryParams);
            foreach (CallLogRecord record in resp.records)
            {
                Console.WriteLine(JsonConvert.SerializeObject(record, Formatting.Indented));
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Cannot read user call log data. " + ex.Message);
        }
    }

PhongVu

Community Manager

It's not the same error. Before, the restClient was null.

What is the reason you call the authorize this way?

restClient.Authorize("<MyJWT>").ConfigureAwait(false);

Try this to see if it helps

await restClient.Authorize("<MyJWT>"));

J

jjones-2

Participating Frequently

I changed everything to be await and I am now able to get records back, however it is only returning calls I have made. I am an admin on our account. Please help me with this.

 class Program
 {

     static RestClient restClient = new RestClient(
         "<myclientid>",
         "<mysecret>", true
     );
     static async Task Main(string[] args)
     {
         try
         {
             // Authenticate a user using a personal JWT token
             await restClient.Authorize("<MyJWT>");

             var ringCallLogResponse = await read_user_calllog();
         }
         catch (Exception ex)
         {
             Console.WriteLine(ex.Message);
         }
     }

     static private async Task<CallLogResponse> read_user_calllog()
     {
         CallLogResponse callLog = new CallLogResponse();
         try
         {
             var queryParams = new ReadUserCallLogParameters();
             queryParams.dateFrom = "2024-01-01T00:00:00.000Z";
             queryParams.dateTo = "2024-01-31T23:59:59.009Z";
             queryParams.view = "Detailed";

             callLog = await restClient.Restapi().Account().Extension().CallLog().List(queryParams);

             foreach (CallLogRecord record in callLog.records)
             {
                 Console.WriteLine(JsonConvert.SerializeObject(record, Formatting.Indented));
             }
         }
         catch (Exception ex)
         {
             Console.WriteLine("Cannot read user call log data. " + ex.Message);
         }

         return callLog;

     }
 }

J

jjones-2

Participating Frequently

When I run it at https://developers.ringcentral.com/api-reference/Call-Log/readCompanyCallLog. I get back 99 pages with 100 records per page.

J

jjones-2

Participating Frequently

I removed the .Extension() and changed ReadUserCallLogParameters to ReadCompanyCallLogParameters and it works. Thank you for you help.