ATL---Collection & Enumerater（3）

练习三： 使用CComEnumOnSTL实现，使用的IEnumVARIANT枚举接口；使用ICollectionOnSTLImpl实现集合。

这种方法基本全由ATL模板提供实现，组件基本上不用写什么代码。

 

1.IDL文件

import "oaidl.idl";import "ocidl.idl";[object,uuid(2D44DAAD-98D9-4786-A91C-848D6DBEC1D1),dual,nonextensible,helpstring("INumbers3 接口"),pointer_default(unique)]interface INumbers3 : IDispatch{[propget, id(1), helpstring("属性 Count")] HRESULT Count([out, retval] LONG* pVal);[propget, id(DISPID_VALUE), helpstring("属性 Item")] HRESULT Item([in] LONG n, [out, retval] LONG* pVal);[propget, id(DISPID_NEWENUM), helpstring("属性 _NewEnum")] HRESULT _NewEnum([out, retval] IUnknown** pVal);};[uuid(93FBE6A0-AEA8-40A4-B1E0-C085E4C7F9AD),version(1.0),helpstring("MyNumbers3 1.0 类型库")]library MyNumbers3Lib{importlib("stdole2.tlb");[uuid(B305004A-27F7-491C-94F9-47DF5CF3615F),helpstring("Numbers3 Class")]coclass Numbers3{[default] interface INumbers3;};};

 

2.Numbers3.h

class _CopyVariantFromLong{public:static HRESULT copy(VARIANT* p1, const long* p2) { p1->vt = VT_I4;p1->lVal = *p2;return S_OK;}static void init(VARIANT *p) {VariantInit(p);}static void destroy(VARIANT *p) {VariantClear(p);}};typedef CComEnumOnSTL< IEnumVARIANT,&IID_IEnumVARIANT,VARIANT,_CopyVariantFromLong,std::vector<long> > MyEnumOnSTL;typedef ICollectionOnSTLImpl<INumbers3,std::vector<long>,long,_Copy<long>,MyEnumOnSTL> MyCollectionOnSTL;// CNumbers3class ATL_NO_VTABLE CNumbers3 :public CComObjectRootEx<CComSingleThreadModel>,public CComCoClass<CNumbers3, &CLSID_Numbers3>,public IDispatchImpl<MyCollectionOnSTL, &IID_INumbers3, &LIBID_MyNumbers3Lib, /*wMajor =*/ 1, /*wMinor =*/ 0>//public IDispatchImpl<INumbers3, &IID_INumbers3, &LIBID_MyNumbers3Lib, /*wMajor =*/ 1, /*wMinor =*/ 0>{public:CNumbers3(){m_coll.push_back(101);m_coll.push_back(202);m_coll.push_back(303);m_coll.push_back(404);}DECLARE_REGISTRY_RESOURCEID(IDR_NUMBERS3)BEGIN_COM_MAP(CNumbers3)COM_INTERFACE_ENTRY(INumbers3)COM_INTERFACE_ENTRY(IDispatch)END_COM_MAP()DECLARE_PROTECT_FINAL_CONSTRUCT()HRESULT FinalConstruct(){return S_OK;}void FinalRelease(){}public:};OBJECT_ENTRY_AUTO(__uuidof(Numbers3), CNumbers3)

 

3.Number3.cpp  ------ 啥也不用俺写了，ATL全搞定

 

 

4.测试Client

// TestNumbers3.cpp : 定义控制台应用程序的入口点。//#include <iostream>#include <atlbase.h>#include <atlcomcli.h>#include <atlcom.h>#include "../MyNumbers3/MyNumbers3.h"#include "../MyNumbers3/MyNumbers3_i.c"using namespace std;int main(int argc, _TCHAR* argv[]){CoInitialize(NULL);try{CComPtr<INumbers3> pNum = NULL;HRESULT hr;hr = CoCreateInstance(CLSID_Numbers3,NULL,CLSCTX_INPROC,IID_INumbers3,(void**)&pNum);if (FAILED(hr)){cout << "CoCrateInstance error." << endl;CoUninitialize();return -1;}long lSize = 0;pNum->get_Count(&lSize);cout << "Size: " << lSize << endl;CComPtr<IEnumVARIANT> pEnum = NULL;CComPtr<IUnknown> pUnknown = NULL;pNum->get__NewEnum(&pUnknown);pUnknown->QueryInterface(IID_IEnumVARIANT,(void**)&pEnum);for (int i=1;i<=lSize;i++){VARIANT varTemp[1];ULONG lFetched = 0;hr = pEnum->Next(1,&varTemp[0],&lFetched);if (SUCCEEDED(hr)){CComVariant comvar;comvar.Attach(&varTemp[0]);wcout << "Number " << i << " is " << comvar.lVal << endl;}}}catch (...){cout << "an expection occur......" << endl;}CoUninitialize();system("pause");return 0;}