idatasink20.h

OPC Client 源代码

// IDataSink20.h: interface for the IDataSink20 class.
// 数据回调:
//			OPC1.0 IAdviseSink
//			OPC2.0 IOPCDataCallback
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_IDATASINK20_H__A31EE385_4EE2_4572_AE9C_481037B9FDA8__INCLUDED_)
#define AFX_IDATASINK20_H__A31EE385_4EE2_4572_AE9C_481037B9FDA8__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class IDataSink20 : public IOPCDataCallback  //OPC2.0 Interface
{
public:
	IDataSink20();
	virtual ~IDataSink20();
public:
	// IUnknown Methods
	STDMETHODIMP         QueryInterface (REFIID iid, LPVOID *ppInterface);
	STDMETHODIMP_(ULONG) AddRef ();
	STDMETHODIMP_(ULONG) Release ();

	//*******************************************************************************************************
	// IOPCDataCallback Methods 
	//*******************************************************************************************************

	//1. OnDataChange notifications
	STDMETHODIMP OnDataChange (
		DWORD dwTransID,			// 0 for normal OnDataChange events, non-zero for Refreshes
		OPCHANDLE hGroup,			// client group handle
		HRESULT hrMasterQuality,	// S_OK if all qualities are GOOD, otherwise S_FALSE
		HRESULT hrMasterError,		// S_OK if all errors are S_OK, otherwise S_FALSE
		DWORD dwCount,				// number of items in the lists that follow
		OPCHANDLE *phClientItems,	// item client handles
		VARIANT *pvValues,			// item data
		WORD *pwQualities,			// item qualities
		FILETIME *pftTimeStamps,	// item timestamps
		HRESULT *pErrors);			// item errors	

	//2. OnReadComplete notifications
	STDMETHODIMP OnReadComplete (
		DWORD dwTransID,			// Transaction ID returned by the server when the read was initiated
		OPCHANDLE hGroup,			// client group handle
		HRESULT hrMasterQuality,	// S_OK if all qualities are GOOD, otherwise S_FALSE
		HRESULT hrMasterError,		// S_OK if all errors are S_OK, otherwise S_FALSE
		DWORD dwCount,				// number of items in the lists that follow
		OPCHANDLE *phClientItems,	// item client handles
		VARIANT *pvValues,			// item data
		WORD *pwQualities,			// item qualities
		FILETIME *pftTimeStamps,	// item timestamps
		HRESULT *pErrors);			// item errors	
	
	//3. OnWriteComplete notifications
	STDMETHODIMP OnWriteComplete (	
		DWORD dwTransID,			// Transaction ID returned by the server when the write was initiated
		OPCHANDLE hGroup,			// client group handle
		HRESULT hrMasterError,		// S_OK if all errors are S_OK, otherwise S_FALSE
		DWORD dwCount,				// number of items in the lists that follow
		OPCHANDLE *phClientItems,	// item client handles
		HRESULT *pErrors);			// item errors	

	//4. OnCancelComplete notifications
	STDMETHODIMP OnCancelComplete (
		DWORD dwTransID,			// Transaction ID provided by the client when the read/write/refresh was initiated
		OPCHANDLE hGroup);

private:
	DWORD m_cnRef;

};

#endif // !defined(AFX_IDATASINK20_H__A31EE385_4EE2_4572_AE9C_481037B9FDA8__INCLUDED_)