I'm writing TAPI 3.0 app in C# for land line telephone. My goal is to receive and record calls. So far in my Code Everything works fine for the first call, all events are triggering.
But unfortunately, all subsequent calls are completely ignored by TAPI after first call and
no event is triggering until I restart the app again.
One thing I had found while googling if I reset Tapi instance it can solve my problem,
Can anyone tell how to reset Tapi object?
Here is my code
void initializetapi3()
{
try
{
tobj = new TAPIClass();
tobj.Initialize();
IEnumAddress ea=tobj.EnumerateAddresses();
ITAddress ln;
uint arg3=0;
lines=0;
cn=new callnotification();
cn.addtolist=new callnotification.listshow(this.status);
tobj.ITTAPIEventNotification_Event_Event+= new TAPI3Lib.ITTAPIEventNotification_EventEventHandler(cn.Event);
tobj.EventFilter=(int)(TAPI_EVENT.TE_CALLNOTIFICATION|
TAPI_EVENT.TE_DIGITEVENT|
TAPI_EVENT.TE_PHONEEVENT|
TAPI_EVENT.TE_CALLSTATE|
TAPI_EVENT.TE_GENERATEEVENT|
TAPI_EVENT.TE_GATHERDIGITS|
TAPI_EVENT.TE_REQUEST|TAPI_EVENT.TE_CALLINFOCHANGE);
for(int i=0;i<10;i++)
{
ea.Next(1,out ln,ref arg3);
ia[i]=ln;
if(ln!=null)
{
comboBox1.Items.Add(ia[i].AddressName);
lines++;
}
else
break;
}
}
catch(Exception e)
{
MessageBox.Show(e.ToString());
}
}
delegate void valueDelegate(string value);
public void status(string str)
{
if (textBox1.InvokeRequired)
{
textBox1.Invoke(new valueDelegate(status), str);
}
else
{
textBox1.Text = str;
}
}
public void Event(TAPI3Lib.TAPI_EVENT te, object eobj)
{
switch (te)
{
case TAPI3Lib.TAPI_EVENT.TE_CALLNOTIFICATION:
status("call notification event has occured");
break;
case TAPI3Lib.TAPI_EVENT.TE_PHONEEVENT:
status("A phone event!");
break;
case TAPI3Lib.TAPI_EVENT.TE_CALLSTATE:
TAPI3Lib.ITCallStateEvent a = (TAPI3Lib.ITCallStateEvent)eobj;
TAPI3Lib.ITCallInfo b = a.Call;
switch (b.CallState)
{
case TAPI3Lib.CALL_STATE.CS_INPROGRESS:
status("dialing");
break;
case TAPI3Lib.CALL_STATE.CS_CONNECTED:
status("Connected");
break;
case TAPI3Lib.CALL_STATE.CS_DISCONNECTED:
status("Disconnected");
break;
case TAPI3Lib.CALL_STATE.CS_OFFERING:
status("A party wants to communicate with you!");
break;
case TAPI3Lib.CALL_STATE.CS_IDLE:
status("Call is created!");
break;
}
break;
}
}
For this problem I used a managed C# wrapper for Tapi written by Julmar , that can be downloaded, By using this Sample incoming calls could also be recroded in .wav format
TPhone tphone;
TTapi tobj;
TTerminal recordTerminal;
TCall CurrCall;
void InitializeTapi()
{
tobj = new TTapi();
tobj.Initialize();
tobj.TE_CALLNOTIFICATION += new System.EventHandler<JulMar.Tapi3.TapiCallNotificationEventArgs>(this.OnNewCall);
tobj.TE_CALLSTATE += new System.EventHandler<JulMar.Tapi3.TapiCallStateEventArgs>(this.OnCallState);
tobj.TE_CALLINFOCHANGE += tobj_TE_CALLINFOCHANGE;
foreach (TPhone tp in tobj.Phones)
{
tphone = tp;
tphone.Open(PHONE_PRIVILEGE.PP_OWNER);
}
foreach (TAddress addr in tobj.Addresses)
{
if (addr.QueryMediaType(TAPIMEDIATYPES.AUDIO))
{
try
{
addr.Open(TAPIMEDIATYPES.AUDIO);
}
catch (TapiException ex)
{
if (ex.ErrorCode == unchecked((int)0x80040004))
{
try
{
addr.Open(TAPIMEDIATYPES.DATAMODEM);
}
catch (Exception ex2)
{
}
}
}
}
}
}
void tobj_TE_CALLINFOCHANGE(object sender, TapiCallInfoChangeEventArgs e)
{
try
{
CurrCall = e.Call;
txtCallerId.Text = e.Call.get_CallInfo(CALLINFO_STRING.CIS_CALLERIDNUMBER).ToString();
objCallLog.CallerID = txtCallerId.Text;
Task.Factory.StartNew(() => AnswerCall());
}
catch (Exception ex)
{
}
}
void OnNewCall(object sender, TapiCallNotificationEventArgs e)
{
CurrCall = e.Call;
}
void OnCallState(object sender, EventArgs E)
{
try
{
TapiCallStateEventArgs e = E as TapiCallStateEventArgs;
CurrCall = e.Call;
TapiPhoneEventArgs ev = E as TapiPhoneEventArgs;
switch (e.State)
{
case CALL_STATE.CS_OFFERING:
break;
case CALL_STATE.CS_CONNECTED:
break;
case CALL_STATE.CS_DISCONNECTED:
try
{
if (recordTerminal != null)
recordTerminal.Stop();
recordTerminal = null;
CurrCall.Dispose();
}
catch (Exception ex)
{
}
finally
{
CurrCall = null;
}
break;
}
}
catch (Exception ex)
{
}
}
void OnCallChangeEvent(object sender, TapiCallInfoChangeEventArgs e)
{
CurrCall = e.Call;
}
private void AnswerCall()
{
try
{
lock (lockAnswer)
{
if (CallStat == CallState.Offering)
{
CurrCall.Answer();
RecordConversation();
}
else
{
}
}
}
catch (Exception ex)
{
}
}
void RecordConversation()
{
if (CurrCall != null)
{
try
{
recordTerminal = CurrCall.RequestTerminal(
TTerminal.FileRecordingTerminal,
TAPIMEDIATYPES.MULTITRACK, TERMINAL_DIRECTION.TD_RENDER);
if (recordTerminal != null)
{
recordTerminal.RecordFileName = "FileName.wav";
CurrCall.SelectTerminalOnCall(recordTerminal);
recordTerminal.Start();
}
else
{
MessageBox.Show("Error in recording file.");
}
}
catch (TapiException ex)
{
MessageBox.Show(ex.ToString());
}
}
}