Unable to load DLL 'tcxpscom_native' error for v15

[jamesdesouza]

Hello,

I tried to upgrade my custom app to v15 but I get error on initialize of app.

System.DllNotFoundException: Unable to load DLL 'tcxpscom_native': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
at TCX.Configuration.PhoneSystem.RegisterListener(MyPFN_UPDATE_LISTENER f)
at TCX.Configuration.PhoneSystem..ctor()
at TCX.Configuration.PhoneSystem.get_Root()

I've done everything on sample project to connect.
Here is my code:

class Connector3CXv15
    {
        static string instanceBinPath;

        public static void Bootstrap()
        {
            try
            {
                var filePath = @"C:\Program Files\3CX Phone System\Instance1\Bin\3CXPhoneSystem.ini";
                if (!File.Exists(filePath))
                {
                    //this code expects 3CXPhoneSystem.ini in current directory.
                    //it can be taken from the installation folder (find it in Program Files/3CXPhone System/instance1/bin for in premiss installation)
                    //or this application can be run with current directory set to location of 3CXPhoneSystem.ini

                    //v14 (cloud and in premiss) installation has changed folder structure.
                    //3CXPhoneSystem.ini which contains connectio information is located in
                    //<Program Files>/3CX Phone System/instanceN/Bin folder.
                    //in premiss instance files are located in <Program Files>/3CX Phone System/instance1/Bin
                    throw new Exception("Cannot find 3CXPhoneSystem.ini");
                }
                instanceBinPath = Path.Combine(GetKeyValue("General", "AppPath", filePath), "Bin");

                //AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;
                Connect(filePath);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }

        public static bool Connect(string filePath)
        {
            {
                var a = new Random(Environment.TickCount);
                //unique name PhoneSystem.ApplicationName = "TestApi";//any name
                PhoneSystem.ApplicationName = "Connector3CXv15" + a.Next().ToString();
            }

            #region phone system initialization(init db server)
            var value = GetKeyValue("ConfService", "ConfPort", filePath);
            var port = 0;
            PhoneSystem.CfgServerHost = "127.0.0.1";
            if (!string.IsNullOrEmpty(value))
            {
                int.TryParse(value.Trim(), out port);
                PhoneSystem.CfgServerPort = port;
            }
            value = GetKeyValue("ConfService", "confUser", filePath);
            if (!string.IsNullOrEmpty(value))
                PhoneSystem.CfgServerUser = value;
            value = GetKeyValue("ConfService", "confPass", filePath);
            if (!string.IsNullOrEmpty(value))
                PhoneSystem.CfgServerPassword = value;
            #endregion
            var dns = PhoneSystem.Root.GetDN(); //Access PhoneSystem.Root to initialize ObjectModel
            //SampleStarter.StartSample(args);
            //PhoneSystem.Root.Disconnect();
            return PhoneSystem.Root.Connected;
        }

        static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
        {
            var name = new AssemblyName(args.Name).Name;
            if (name == "3cxpscomcpp2")
                return Assembly.LoadFrom(Path.Combine(instanceBinPath, name + ".dll"));
            else
                throw new FileNotFoundException();
        }

        [DllImport("kernel32.dll", EntryPoint = "GetPrivateProfileStringA")]
        static extern int GetKeyValueA(string strSection, string strKeyName, string strNull, StringBuilder RetVal, int nSize, string strFileName);
        static public string GetKeyValue(string Section, string KeyName, string FileName)
        {
            //Reading The KeyValue Method
            try
            {
                StringBuilder JStr = new StringBuilder(255);
                int i = GetKeyValueA(Section, KeyName, String.Empty, JStr, 255, FileName);
                return JStr.ToString();
            }
            catch (System.Exception e)
            {
                throw e;
            }
        }

        public static string GetParameterValue(string name, string DefaultValue, ref bool exists)
        {
            try
            {
                exists = true;
                return TCX.Configuration.PhoneSystem.Root.GetParameterByName(name).Value;
            }
            catch
            {
                exists = false;
                return DefaultValue;
            }
        }
    }

In addition, I'm using Topshelf library.

How should I solve this problem?

***

I can not connect even with the code below

{
var a = new Random(Environment.TickCount);
PhoneSystem.ApplicationName = "Connector3CXv15" + a.Next().ToString();
}
PhoneSystem.CfgServerHost = "127.0.0.1";
PhoneSystem.CfgServerPort = 5485;
PhoneSystem.CfgServerUser = "cfguser_default";
PhoneSystem.CfgServerPassword = "z320xszg1lj";
var dns = PhoneSystem.Root.GetDN();

I got the same error at .Root property.

 

[Sopock]

Maybe you need to change or Set the Copy Local Property of a Reference?

 

[HurricaneH]

Did you ever get beyond this problem. I'm wrestling with it now. Also interested in best practices or leassons learned to test within Visual Studio

 

[jamesdesouza]

You should always add reference from GAC and disable "copy local" property. This is the best practice, afaik.
But this not solve the problem. I had to change my project type from library to application.
Did you test 3cx api example if it can connect? http://downloads.3cx.com/downloads/misc/callcontrolapi/3CXCallControlAPI_v15.zip