tapi3

[avadhut]

Hello,
I am getting null refernce exception. in
isc.CreateStream(TapiConstants.TAPIMEDIATYPE_AUDIO,TERMINAL_DIRECTION.TD_CAPTURE);

Please resolve the same


//ANSWER BUTTON
private void answer_Click(object sender, System.EventArgs e)
{
ITAddress i;
i = ia[line];
bool status=false;

IEnumCall ec = ia[line].EnumerateCalls();
uint arg = 0;
ITCallInfo ici;

try
{
ec.Next(1, out ici, ref arg);
ITBasicCallControl m_CallControl = (TAPI3Lib.ITBasicCallControl)ici;
// ITBasicCallControl2 callControl2 = ici as ITBasicCallControl2;
ITStreamControl isc = ici as ITStreamControl;//= (TAPI3Lib.ITStreamControl)ici;
ITStream ist=ici as ITStream;
ITTerminal localTerm = ici as ITTerminal;//(TAPI3Lib.ITTerminal)ici;
if (!reject)
{
// request the terminal using right media type and direction
//localTerm =
callControl2.RequestTerminal(TapiConstants.CLSID_String_FilePlaybackTerminal,
TapiConstants.TAPIMEDIATYPE_AUDIO, TERMINAL_DIRECTION.TD_CAPTURE);


//NULLREFERNCEEXCEPTION
isc.CreateStream(TapiConstants.TAPIMEDIATYPE_AUDIO,TERMINAL_DIRECTION.TD_CAPTURE);

ist.SelectTerminal(localTerm);
ist.StartStream();


ITMediaSupport mediasupport = localTerm as ITMediaSupport;
// prepare to put the file name

ITMediaPlayback mediaPlayback = localTerm as ITMediaPlayback;

if (mediaPlayback != null)
{
try
{
// Set the filename to play
object[] fileList = { @"E:tapi8.2w.wav" };


mediaPlayback.PlayList = fileList;

// Select the terminal
//callControl2.SelectTerminalOnCall(localTerm);
// ist.SelectTerminal(localTerm);
ist.StartStream();

// Answer the call
m_CallControl.Answer();
//callControl2.Answer();

// Start playback.
ITMediaControl mediaControl = localTerm as ITMediaControl;
mediaControl.Start();

// Assign the terminal now terminal
// m_PlayFileTerminal = localTerm;
status = true;
}

catch (Exception ep)
{
MessageBox.Show("here is exception inplaying musicnn" + ep);
//if (Log.IsErrorEnabled)
//{
// Log.ErrorFormat("Call.ReadyPlayTerminal: *** EXCEPTION*** {0}",
e);
//}
}
}
//}*/
}
else
{
MessageBox.Show("All calls are rejected. Please remove 'Reject'
tickmark");
m_CallControl.Disconnect(DISCONNECT_CODE.DC_REJECTED);
//ici.ReleaseUserUserInfo();
tobj.Shutdown();
initializetapi3();
registertoken[line] = tobj.RegisterCallNotifications(ia[line], true, true,
TapiConstants.TAPIMEDIATYPE_DATAMODEM, 2);
MessageBox.Show("Registration token : " + registertoken[line],
"Registration Succeed for line " + line);
}

}
catch (Exception exp)
{
MessageBox.Show("There may not be any calls to answer! nn" + exp,
"TAPI3");
}
}