#include?“stdafx.h“
#include?“Item.h“

#include?“opcda.h“
#include?se.h>?

#ifdef?_DEBUG
#undef?THIS_FILE
static?char?THIS_FILE[]=__FILE__;
#define?new?DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
//?Construction/Destruction
//////////////////////////////////////////////////////////////////////

IMPLEMENT_DYNCREATE（CItem?Cobject）

CItem::CItem（）
{
	Handle?=?NULL;
?	VariantInit（&Value）;
	Quality?=?OPC_QUALITY_UNCERTAIN;
	Name.Empty（）;
	Connected?=?FALSE;
}

CItem::~CItem（）
{
	VariantClear（&Value）;
	Name.ReleaseBuffer（）;
}


void?CItem::ReadFromDevice（）
{
	//if?not?connected?no?need?to?read?from?device
	if?（!Connected）?return;

	//Read?value?from?hardware
	//in?this?sample?we?just?do?some?simple?simulation

	switch?（Value.vt）
	{
	case?VT_BOOL:	//BOOL
		Value.boolVal?=?!Value.boolVal;
		break;
	case?VT_I2:		//SHORT
		Value.iVal?+=?1;
		break;
	case?VT_UI2:	//WORD
		Value.uiVal?+=?1;
		break;
	case?VT_I4:		//LONG
		Value.lVal?+=?1;
		break;
	case?VT_UI4:	//DWORD
		Value.ulVal?+=?1;
		break;
	case?VT_R4:		//Float
		Value.fltVal?+=?0.01f;
		break;
	case?VT_R8:		//Double
		Value.dblVal?+=?0.02f;
		break;
	case?VT_BSTR:	//String
		int?n?=?rand（）;
		SysFreeString（Value.bstrVal）;
		if?（?n?>?0x7000?）
			Value.bstrVal?=?SysAllocString（L“This?is?a?string?test.“）;
		else?if?（?n>0x6000?）
			Value.bstrVal?=?SysAllocString（L“http://www.eehoo.net“）;
		else?if?（?n>0x5000?）
			Value.bstrVal?=?SysAllocString（L“Knight.OPC.Server.RDK“）;
		else?if?（?n>0x4000?）
			Value.bstrVal?=?SysAllocString（L“eehoo?Technology“）;
		else?if?（?n>0x3000?）
			Value.bstrVal?=?SysAllocString（L“sales@eehoo.net“）;
		else?if?（?n>0x2000?）
			Value.bstrVal?=?SysAllocString（L“Knight.OPC.Server.Test“）;
		else?if?（?n>0x1000?）
			Value.bstrVal?=?SysAllocString（L“opc@eehoo.net“）;
		else
			Value.bstrVal?=?SysAllocString（L“You‘re?welcome!“）;
		break;		
	}//end?switch

	//setting?quality
	Quality?=?OPC_QUALITY_GOOD;

	//setting?timestamp
	SYSTEMTIME?sysTime;
	GetSystemTime（&sysTime）;
	SystemTimeToFileTime（&sysTime&this->TimeStamp）;
}

void?CItem::WriteToDevice（VARIANT?*pVar）
{
	//Write?value?to?your?hardware
	//in?this?sample?we?just?do?some?simple?simulation
	VariantClear（&Value）;
	VariantCopy（&ValuepVar）;

	//setting?quality
	Quality?=?OPC_QUALITY_GOOD;

	//setting?timestamp
	SYSTEMTIME?sysTime;
	GetSystemTime（&sysTime）;
	SystemTimeToFileTime（&sysTime&this->TimeStamp）;
}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2003-04-09?17:31??help\
?????目錄???????????0??2003-04-09?17:31??help\chn\
?????文件??????300949??2002-11-01?10:20??help\chn\KOSRDK_chn.pdf
?????目錄???????????0??2003-04-09?17:31??help\enu\
?????文件???????42227??2002-11-01?10:48??help\enu\KOSRDK.chm
?????文件????????3429??2003-04-10?16:26??license.txt
?????文件????????5025??2003-04-10?16:38??license_chn.txt
?????目錄???????????0??2003-04-09?17:31??opcdist\
?????文件??????158560??1999-03-01?11:27??opcdist\APRXDIST.EXE
?????文件???????73728??2002-10-21?15:54??opcdist\opccomn_ps.dll
?????文件???????81920??2002-10-21?15:54??opcdist\OPCENUM.EXE
?????文件??????118784??2001-04-26?11:19??opcdist\opchda_ps.dll
?????文件???????77824??1999-03-02?13:55??opcdist\opcproxy.dll
?????文件???????45056??1999-06-03?11:15??opcdist\opc_aeps.dll
?????文件????????1085??2002-10-21?09:34??opcdist\readme.txt
?????文件????????4819??2003-04-10?16:32??readme.txt
?????目錄???????????0??2003-04-09?17:31??release\
?????文件??????237568??2003-04-02?18:03??release\KOSRDK.dll
?????文件????????6374??2003-04-02?18:03??release\KOSRDK.lib
?????文件????????7587??2003-04-02?18:07??release\KOSRDKapi.h
?????文件???????93689??1999-04-08?17:52??release\opcda.h
?????目錄???????????0??2003-04-09?17:31??samples\
?????目錄???????????0??2003-04-09?17:31??samples\bin\
?????目錄???????????0??2003-04-09?17:31??samples\bin\KOSSerial\
?????文件???????28672??2002-11-25?14:18??samples\bin\KOSSerial\ComDeviceSimulator.exe
?????文件???????36864??2002-11-25?14:30??samples\bin\KOSSerial\KOSSerial.exe
?????文件????????1960??2002-11-25?14:54??samples\bin\KOSSerial\ReadMe_chn.txt
?????文件????????2062??2002-11-26?15:26??samples\bin\KOSSerial\ReadMe_enu.txt
?????文件??????155648??2002-12-10?11:37??samples\bin\KOSVB.exe
?????文件???????45056??2002-12-10?15:45??samples\bin\KOSVC.exe
?????文件???????40960??2002-12-03?16:43??samples\bin\KOSVC2.exe
............此處省略77個(gè)文件信息