private void CloseDS()
{
DisableDS();
if ((twainState & TwainStateFlag.DSOpen) != 0)
{
if (tw.DsmIdentity(appId, IntPtr.Zero, TwDG.Control, TwDAT.Identity, TwMSG.CloseDS, sources[CurrentScanner]) == TwRC.Success)
{
twainState &= ~TwainStateFlag.DSOpen;
}
else
{
throw new Exception(GetTwainStatus());
}
}
}
private TwRC OpenDS()
{
CloseDS();
TwRC rc = tw.DsmIdentity(appId, IntPtr.Zero, TwDG.Control, TwDAT.Identity, TwMSG.OpenDS, sources[CurrentScanner]);
if (rc == TwRC.Success)
{
twainState |= TwainStateFlag.DSOpen;
}
else
{
throw new Exception(GetTwainStatus());
}
return(rc);
}
private void CloseDSM()
{
CloseDS();
if ((twainState & TwainStateFlag.DSMOpen) != 0)
{
if (tw.DsmParent(appId, IntPtr.Zero, TwDG.Control, TwDAT.Parent, TwMSG.CloseDSM, ref hwnd) == TwRC.Success)
{
twainState &= ~TwainStateFlag.DSMOpen;
}
else
{
throw new Exception(GetTwainStatus());
}
}
appId.Id = 0;
}
private TwRC SetCapability()
{
TwCapability cap = new TwCapability(TwCap.XferCount, 1, TwType.Int16);
TwRC rc = tw.DsCapability(appId, sources[CurrentScanner], TwDG.Control, TwDAT.Capability, TwMSG.Set, cap);
if (rc != TwRC.Success)
{
CloseDS();
throw new Exception(GetTwainStatus());
}
else
{
twainState |= TwainStateFlag.DSReady;
}
return(rc);
}
private TwRC OpenDSM()
{
CloseDSM();
TwRC rc = tw.DsmParent(appId, IntPtr.Zero, TwDG.Control, TwDAT.Parent, TwMSG.OpenDSM, ref hwnd);
if (rc == TwRC.Success)
{
twainState |= TwainStateFlag.DSMOpen;
GetAllSorces();
CurrentScanner = DefaultScanner;
}
else
{
throw new Exception(GetTwainStatus());
}
return(rc);
}
private void DisableDS()
{
if ((twainState & TwainStateFlag.DSEnabled) != 0)
{
TwUserInterface guif = new TwUserInterface()
{
ParentHand = hwnd,
ShowUI = false
};
if (tw.DsUserinterface(appId, sources[CurrentScanner], TwDG.Control, TwDAT.UserInterface, TwMSG.DisableDS, guif) == TwRC.Success)
{
twainState &= ~TwainStateFlag.DSEnabled;
}
else
{
throw new Exception(GetTwainStatus());
}
}
}
private TwRC EnableDS()
{
TwRC rc = SetCapability();
if (rc == TwRC.Success)
{
TwUserInterface guif = new TwUserInterface()
{
ShowUI = false,
ModalUI = true,
ParentHand = hwnd
};
rc = tw.DsUserinterface(appId, sources[CurrentScanner], TwDG.Control, TwDAT.UserInterface, TwMSG.EnableDS, guif);
if (rc == TwRC.Success)
{
twainState |= TwainStateFlag.DSEnabled;
}
else
{
throw new Exception(GetTwainStatus());
}
}
return(rc);
}
