清空IE CWebBrowser2缓存

int CTestWebBrowserDlg::RemoveCache(){// Pointer to a GROUPID variableGROUPID groupId = 0;// Local variablesDWORD cacheEntryInfoBufferSizeInitial = 0; DWORD cacheEntryInfoBufferSize = 0; int *cacheEntryInfoBuffer = 0; INTERNET_CACHE_ENTRY_INFOA *internetCacheEntry; HANDLE enumHandle = NULL; BOOL returnValue = false;// Delete the groups first. // Groups may not always exist on the system. // For more information, visit the following Microsoft Web site: // [url]http://msdn2.microsoft.com/en-us/library/ms909365.aspx[/url] // By default, a URL does not belong to any group. Therefore, that cache may become // empty even when the CacheGroup APIs are not used because the existing URL does not belong to any group. enumHandle = FindFirstUrlCacheGroup(0, CACHEGROUP_SEARCH_ALL, 0, 0, &groupId, 0);// If there are no items in the Cache, you are finished.if (enumHandle != NULL && ERROR_NO_MORE_ITEMS == GetLastError())return 0;// Loop through Cache Group, and then delete entries.while(1){// Delete a particular Cache Group.returnValue = DeleteUrlCacheGroup(groupId, CACHEGROUP_FLAG_FLUSHURL_ONDELETE, 0);if( groupId <= 0 )break;if (!returnValue && ERROR_FILE_NOT_FOUND == GetLastError()){ returnValue = FindNextUrlCacheGroup(enumHandle, &groupId, 0);}if (!returnValue && (ERROR_NO_MORE_ITEMS == GetLastError() || ERROR_FILE_NOT_FOUND == GetLastError())){break;}}// Start to delete URLs that do not belong to any group.enumHandle = FindFirstUrlCacheEntry(NULL, 0, &cacheEntryInfoBufferSizeInitial);if (enumHandle != NULL && ERROR_NO_MORE_ITEMS == GetLastError())return 0;cacheEntryInfoBufferSize = cacheEntryInfoBufferSizeInitial;internetCacheEntry = (INTERNET_CACHE_ENTRY_INFOA *)malloc(cacheEntryInfoBufferSize);enumHandle = FindFirstUrlCacheEntry(NULL, internetCacheEntry, &cacheEntryInfoBufferSizeInitial); while(1){cacheEntryInfoBufferSizeInitial = cacheEntryInfoBufferSize; returnValue = DeleteUrlCacheEntry(internetCacheEntry->lpszSourceUrlName); if (!returnValue){ returnValue = FindNextUrlCacheEntry(enumHandle, internetCacheEntry, &cacheEntryInfoBufferSizeInitial);}DWORD dwError = GetLastError();if (!returnValue && ERROR_NO_MORE_ITEMS == dwError){break;} if (!returnValue && cacheEntryInfoBufferSizeInitial > cacheEntryInfoBufferSize){cacheEntryInfoBufferSize = cacheEntryInfoBufferSizeInitial;internetCacheEntry = (INTERNET_CACHE_ENTRY_INFOA *)realloc(internetCacheEntry, cacheEntryInfoBufferSize);returnValue = FindNextUrlCacheEntry(enumHandle, internetCacheEntry, &cacheEntryInfoBufferSizeInitial); }}free(internetCacheEntry);printf("deleted the cache entries/n");return 0;}

 

清空IE CWebBrowser2缓存

CWebBrowser2接口中未实现清空缓存

 

FindFirstUrlCacheGroup，DeleteUrlCacheGroup，FindNextUrlCacheGroup 不支持VC6

只能全部删除所有缓存，不能删除指定网址的缓存，FindFirstUrlCacheGroup的第二个参数必须为0（CACHEGROUP_SEARCH_ALL）