用于自定义数组/结构体数组的剪切板应用模板类

//用于自定义数组/结构体数组的剪切板应用类template <class MYDATA> class COwnerArrayDataClipboard  {  //用于剪切板数据结构体  typedef struct tagMYSTRUCTARRAY_t  {    int iCount; //记录数据个数    MYDATA data[1]; //数据  }MYSTRUCTARRAY, *LPMYSTRUCTARRAY;  HWND hClipboardHwnd; //剪切板窗口句柄  UINT uFormat; //剪切板粘贴格式//Trace Error  #define TraceErr(e) \  do{ \    dwErr=GetLastError();\    TRACE( _T(#e) _T(" Error Code:%ld\n"), dwErr);\    ASSERT(FALSE);\  }while(0);public:  COwnerArrayDataClipboard()  {    //以桌面窗口做剪切板窗口句柄    hClipboardHwnd = GetDesktopWindow();     //注册剪切板格式    CString szFormat;    szFormat.Format(_T("ClipBoard_%d"), sizeof(MYDATA));        uFormat = RegisterClipboardFormat( szFormat );    if(uFormat == 0)    {      DWORD dwErr = GetLastError();      TRACE( _T("RegisterClipboardFormat failed : %ld\n"), dwErr);      ASSERT(FALSE);    }  }  //链表粘贴到剪切板  //iCont 指示 DataArray个数  //DataArray源数据  BOOL PasteToClipboard(const int iBuffCount, const MYDATA DataArray[])  {    DWORD dwErr = ERROR_SUCCESS;    HGLOBAL hMem = NULL;    BOOL bClipOpened = FALSE;    do     {      //打开剪切板      bClipOpened = OpenClipboard(hClipboardHwnd);      if(!bClipOpened)      {        TraceErr("OpenClipboard");        break;      }      //清空剪切板      if(!EmptyClipboard())      {        TraceErr("EmptyClipboard");        break;      }      //分配所需内存      DWORD dwSize = sizeof(MYSTRUCTARRAY) + (iBuffCount-1) * sizeof(MYDATA); //计算长度      hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, dwSize); //分配内存      if(hMem == NULL)      {        TraceErr("GlobalAlloc");        break;      }      //锁定内存      LPMYSTRUCTARRAY pArray = (LPMYSTRUCTARRAY)GlobalLock(hMem);       if(pArray == NULL)      {        TraceErr("GlobalLock");        break;      }      //拷贝数据至内存      {        pArray->iCount = iBuffCount; //拷贝结构体个数        for(int i=0; i<iBuffCount; i++)        {          pArray->data[i] = DataArray[i]; //拷贝结构体数据        }      }      //解锁内存      if(!GlobalUnlock(hMem) && GetLastError() != ERROR_SUCCESS)      {        TraceErr("GlobalUnlock");        break;      }      if(SetClipboardData(uFormat, hMem) == NULL)      {        TraceErr("SetClipboardData");        break;      }        } while (0);    //出错释放内存    if(dwErr && hMem)    {      GlobalFree(hMem);      hMem = NULL;    }      //关闭剪切板    if(bClipOpened)      CloseClipboard();    return dwErr == ERROR_SUCCESS;  }  //从剪切板读取数据  //用于存放返回 DataArray数据缓冲区  //iBuffCount 输入时指示缓冲区大小  //函数返回值:    //当DataArray==NULL 或 iBuffCount==0时 返回 剪切板中可用的数据个数    //当否则返回实际读取的个数  int CopyFromClipboard(MYDATA DataArray[], const int iBuffCount)  {    int iCount = 0;    DWORD dwErr = ERROR_SUCCESS;    BOOL bClipOpened = FALSE;    do     {      //打开剪切板      bClipOpened = OpenClipboard(hClipboardHwnd);      if(!bClipOpened)      {        TraceErr("OpenClipboard");        break;      }      if(!IsClipboardFormatAvailable(uFormat))//检查格式有效        {        TraceErr("IsClipboardFormatAvailable");        break;              }      HGLOBAL hMem = GetClipboardData(uFormat);//读取数据句柄       if(hMem == NULL)      {        TraceErr("GetClipboardData");        break;      }      //锁定内存      LPMYSTRUCTARRAY pArray = (LPMYSTRUCTARRAY)GlobalLock(hMem);       if(pArray == NULL)      {        TraceErr("GlobalLock");        break;      }      //拷贝数据至内存      if(DataArray == NULL || iBuffCount <= 0)      {        iCount = pArray->iCount;      }      else      {        iCount = min(iBuffCount, pArray->iCount);        for(int i=0; i<iCount; i++)        {          DataArray[i] = pArray->data[i];        }      }      //解锁内存      if(!GlobalUnlock(hMem) && GetLastError() != ERROR_SUCCESS)      {        TraceErr("GlobalUnlock");        break;      }        } while (0);      //关闭剪切板    if(bClipOpened)      CloseClipboard();    return iCount;  }};

//测试//测试结构体typedef struct tagMYSTRUCT_t{  int a, b, c;    tagMYSTRUCT_t()  {    a = b = c = 0;  }  tagMYSTRUCT_t(int a1, int b1, int c1)  {    a = a1; b = b1; c = c1;  }  tagMYSTRUCT_t( tagMYSTRUCT_t & other)  {    memcpy(this, &other, sizeof(*this));  }  }MYSTRUCT, *LPMYSTRUCT;void TestOwnerArrayDataClipboard(){  //准备源数据  const int iSrcCount = 5;  MYSTRUCT myStruct1[iSrcCount];  for(int i=0; i<iSrcCount; i++)  {    myStruct1[0].a = i+1;  }  COwnerArrayDataClipboard < MYSTRUCT > clipboard;  //粘贴到剪切板  clipboard.PasteToClipboard(iSrcCount, myStruct1);  //获取长度  int iDstCount = clipboard.CopyFromClipboard(NULL, 0);  ASSERT(iDstCount == iSrcCount);    //读取全部数据  MYSTRUCT *myStruct2 = new MYSTRUCT[iDstCount];  clipboard.CopyFromClipboard(myStruct2, iDstCount);  for(int j=0; j<iDstCount; j++)  {    if(memcmp(&myStruct1[j], &myStruct2[j], sizeof(MYSTRUCT)) != 0)    {      ASSERT(FALSE);    }  }  //清理  delete []myStruct2;}