VC 实现文件关联

VC/MFC 设置程序与文件关联与双击文件获取文件路径(2008-10-10 10:59:15)分类：编程技术标签：vc/mfc设置程序与文件关联双击文件获取文件路径it如何设置程序与文件关联并且双击关联文件时获取文件的路径呢？一般来说可以通过写注册表的方式实现，在函数入口处实现功能。

例如在VC/MFC中，可以在应用程序的C**App.cpp文件中InitInstance()函数中实现该功能。

#include <string>using namespace std;//关联文件的后缀名，如"txt"、"doc"等string m_csExtension;string m_csShellOpenCommand;string m_csDocumentShellOpenCommand;//注册表中文件夹类名string m_csDocumentClassName;//关联文件的默认图标string m_csDocumentDefaultIcon;///////赋值函数//////void SetExtension( LPCTSTR szExtension ){m_csExtension = szExtension;}void SetShellOpenCommand( LPCTSTR szShellOpenCommand ){m_csShellOpenCommand = szShellOpenCommand;}void SetDocumentShellOpenCommand( LPCTSTR szDocumentShellOpenCommand ){m_csDocumentShellOpenCommand = szDocumentShellOpenCommand;}void SetDocumentClassName( LPCTSTR szDocumentClassName ){m_csDocumentClassName = szDocumentClassName;}void SetDocumentDefaultIcon( LPCTSTR szDocumentDefaultIcon ){m_csDocumentDefaultIcon = szDocumentDefaultIcon;}///////赋值函数////////////关键函数：实现写注册表的函数////////BOOL SetRegistryValue(HKEY hOpenKey,LPCTSTR szKey,LPCTSTR szValue,LPCTSTR szData){// validate inputif( !hOpenKey || !szKey || !szKey[0] ||!szValue || !szData ){::SetLastError(E_INVALIDARG);return FALSE;}BOOL bRetVal = FALSE;DWORD dwDisposition;DWORD dwReserved = 0;HKEY hTempKey = (HKEY)0;// length specifier is in bytes, and some TCHAR// are more than 1 byte eachDWORD dwBufferLength = lstrlen(szData) * sizeof(TCHAR);// Open key of interest// Assume all access is okay and that all keys will be stored to file// Utilize the default security attributesif( ERROR_SUCCESS == ::RegCreateKeyEx(hOpenKey, szKey, dwReserved, (LPTSTR)0, REG_OPTION_NON_VOLATILE, KEY_SET_VALUE, 0,&hTempKey, &dwDisposition) ){// dwBufferLength must include size of terminating nul// character when using REG_SZ with RegSetValueEx functiondwBufferLength += sizeof(TCHAR);if( ERROR_SUCCESS == ::RegSetValueEx(hTempKey, (LPTSTR)szValue, dwReserved, REG_SZ, (LPBYTE)szData, dwBufferLength) ){bRetVal = TRUE;}}// close opened keyif( hTempKey ){::RegCloseKey(hTempKey);}return bRetVal;}BOOL RegSetExtension(void){if( m_csExtension.empty() ){return FALSE;}std::string csKey = "." + m_csExtension;SetRegistryValue(HKEY_CLASSES_ROOT, csKey.c_str(), "", m_csDocumentClassName.c_str());if( !m_csShellOpenCommand.empty() ){csKey += "\\shell\\open\\command";SetRegistryValue(HKEY_CLASSES_ROOT, csKey.c_str(), "", m_csShellOpenCommand.c_str());}return TRUE;}BOOL RegSetDocumentType(void){if( m_csDocumentClassName.empty()){return FALSE;}std::string csKey = m_csDocumentClassName;SetRegistryValue(HKEY_CLASSES_ROOT, csKey.c_str(), "", m_csDocumentDescription.c_str());// DefaultIconif( !m_csDocumentDefaultIcon.empty() ){csKey = m_csDocumentClassName;csKey += "\\DefaultIcon";SetRegistryValue(HKEY_CLASSES_ROOT, csKey.c_str(), "", m_csDocumentDefaultIcon.c_str());}// shell\open\commandif( !m_csShellOpenCommand.empty() ){csKey = m_csDocumentClassName;csKey += "\\shell\\open\\command";SetRegistryValue(HKEY_CLASSES_ROOT, csKey.c_str(), "",m_csShellOpenCommand.c_str());}return TRUE;}BOOL RegSetAllInfo(void){RegSetExtension(); RegSetDocumentType();return TRUE;}//注册程序与文件后缀名的关联void RegisterFileAndProgram(){////一个应用程序与多个文件后缀关联//// #define strExternsionLength 4LPCTSTR strExtension[] ={"bmp","jpg","jpe","jpeg"};CGCFileTypeAccess TheFTA;TCHAR szProgPath[MAX_PATH * 2];//获取程序路径::GetModuleFileName(NULL, szProgPath, sizeof(szProgPath)/sizeof(TCHAR)); CString csTempText;for(int i = 0; i < strExternsionLength; ++i){//设置程序需要关联的后缀名,如"txt" "doc" 等SetExtension(strExtension[i]);csTempText.Format("\"%s\" %s",szProgPath,"\"%1\"");SetShellOpenCommand(csTempText);SetDocumentShellOpenCommand(csTempText);//设置注册表中文件类的别名，例如可以是程序名称:**.exeSetDocumentClassName("**");// use first icon in programcsTempText = szProgPath;csTempText += ",0";SetDocumentDefaultIcon(csTempText);RegSetAllInfo();}}//入口函数：初始化所需的操作BOOL C**App::InitInstance(){////////////***Code***//////////注册程序与文件后缀名的关联RegisterFileAndProgram();// 分析标准外壳命令、DDE、打开文件操作的命令行CCommandLineInfo cmdInfo;ParseCommandLine(cmdInfo);//获取命令行传过来的参数：双击打开的文件的文件路径名称CString strFilePathName = cmdInfo.m_strFileName;// 调度在命令行中指定的命令。

如果// 用/RegServer、/Register、/Unregserver 或/Unregister 启动应用程序，则返回FALSE。