【发布时间】：2016-10-21 20:47:46
【问题描述】：
当我调用Created 方法时，它会使我的控制台应用程序崩溃。如果我将其注释掉，我的程序运行良好。我正在尝试获取共享网络驱动器（Windows 操作系统）上文件的创建日期，但我无法弄清楚错误是什么。我只想能够获得创建文件时的时间戳。如果我能修复这种方法来做到这一点，那就太好了。如果没有，任何将产生该文件创建时间的时间戳的替换方法都是可以接受的。非常感谢任何帮助或指导。
#pragma comment(lib, "th32.lib")
#define VC_EXTRALEAN
#include "stdafx.h"
#include <windows.h>
#include <tlhelp32.h>
#include <tchar.h>
#include <cstring>
#include <io.h>
//#include <dirent.h>
#include <stdio.h>
#include <shlwapi.h>
#include <iostream>
#include <string>
#include <vector>
#include <cstring>
#include <strsafe.h>
using namespace std;
//Returns the last Win32 error, in string format. Returns an empty string if there is no error.
std::string GetLastErrorAsString()
{
//Get the error message, if any.
DWORD errorMessageID = ::GetLastError();
if(errorMessageID == 0)
return std::string(); //No error message has been recorded
LPSTR messageBuffer = nullptr;
size_t size = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, errorMessageID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, NULL);
std::string message(messageBuffer, size);
//Free the buffer.
LocalFree(messageBuffer);
return message.c_str();
}
__int64 FileSize(const wchar_t* name) //, bool _true
{
WIN32_FILE_ATTRIBUTE_DATA fad;
std::wstring temp;
wchar_t* created;
wchar_t* error;
if (!GetFileAttributesEx(name, GetFileExInfoStandard, &fad))
{
error = L"Error";
return -1; // error condition, could call GetLastError to find out more
}
LARGE_INTEGER size;
size.HighPart = fad.nFileSizeHigh;
size.LowPart = fad.nFileSizeLow;
//return (wchar_t*) size.QuadPart;
return size.QuadPart;
}
const wchar_t* Created(const wchar_t* name) //, bool _true
{
WIN32_FILE_ATTRIBUTE_DATA fad;
//std::wstring temp;
std::wstring created;
SYSTEMTIME st;
if (!GetFileAttributesEx(name, GetFileExInfoStandard, &fad))
{
std::wstring error(L"Error");
return error.c_str(); // error condition, could call GetLastError to find out more
}
if (!FileTimeToSystemTime(&fad.ftCreationTime, &st))
{
std::wstring error(L"Error getting created Time");
return error.c_str(); // error condition, could call GetLastError to find out more
}
std::wstring month((wchar_t*)st.wMonth);
std::wstring day((wchar_t*)st.wDay);
std::wstring year((wchar_t*)st.wYear);
created = month + L"/" + day + L"/" + year;
//created = temp.c_str();
//created = st.wMonth + '/' + st.wDay + '/' + st.wYear;
return created.c_str();
}
int _tmain(int argc, _TCHAR* argv[])
{
std::wstring ap(L"//S001E002/Some Folder/");
std::wstring all(L"*");
std::wstring temp = ap + all;
const wchar_t* Hotels = temp.c_str();
const wchar_t* current = L".";
const wchar_t* parent = L"..";
wchar_t* pdf = L"/*.??f\0";
wchar_t* tif = L"/*.*f";
WIN32_FIND_DATA FindFileData;
std::vector<std::wstring> folders;
std::vector<std::wstring> vs;
HANDLE hFind;
std::wcout << "Hotels Folder directory: " << Hotels << "\n";
hFind = FindFirstFile(Hotels, &FindFileData);
if (hFind != INVALID_HANDLE_VALUE)
{
do {
{
if(FindFileData.dwFileAttributes & _A_SUBDIR)
{
temp = FindFileData.cFileName;
if ( wcscmp(temp.c_str(), current) == 0 || wcscmp(temp.c_str(), parent) == 0 ) {}
else
{
folders.push_back(FindFileData.cFileName);
std::wcout << "Folder: " << FindFileData.cFileName << "\n";
//std::wcout << " equal? " << current << " : " << temp << " : " << parent << "\n";
}
}
}
} while (FindNextFile(hFind, &FindFileData));
FindClose(hFind);
}
//std::wcout << "Folder: " << str << "\n";
for (int i = 0; i < folders.size(); i++)
{
//folders[i]
temp = ap + folders[i] + pdf;
const wchar_t* _files = temp.c_str();
std::wcout << "File Directory: " << _files << "\n";
hFind = FindFirstFile(_files, &FindFileData);
if (hFind != INVALID_HANDLE_VALUE)
{
do {
{
temp = FindFileData.cFileName;
if ( wcscmp(temp.c_str(), current) == 0 || wcscmp(temp.c_str(), parent) == 0 ) {}
else
{
//std::wcout << "File: "<< FindFileData.cFileName ;
//std::wcout << " equal? " << current << " : " << temp << " : " << parent << "\n";
temp = ap + folders[i] + L"/" + FindFileData.cFileName;
vs.push_back(temp);
}
}
} while (FindNextFile(hFind, &FindFileData));
FindClose(hFind);
}
else
{
temp = ap + folders[i] + L"/";
std::wcout << temp.c_str() << " | ";
std::cout << GetLastErrorAsString() << "\n";
}
}
/*for (auto item : vs)
std::wcout << item << "\n";*/
__int64 size;
const wchar_t* created;
std::cout << "\n" << "Start File Stats" << "\n";
for (int i = 0; i < vs.size(); i++)
{
size = FileSize(vs[i].c_str());
created = Created(vs[i].c_str());
std::wcout << vs[i] << " | File size: ";
std::wcout << size ;
std::wcout << " | Created: " << created << " | Error: " << GetLastErrorAsString;
std::wcout << "\n"; // , 1 << FileSize(vs[i].c_str(), 0)
}
std::cout << "\n" << "End File Stats" << "\n";
std::cout << GetLastErrorAsString() << "\n";
std::cout << "Folder count: " << folders.size() << "\n";
std::cout << "File count: " << vs.size() << "\n";
return 0;
}
【问题讨论】：
-
我们甚至没有 full 方法。以及执行跟踪（因为您添加了很多跟踪，它们可能很有用）。等等：调试器更有用。
-
1) 我会使用 wstringstream 来构建字符串。 2）您正在返回一个局部变量。 3) 你不能缩小到导致崩溃的那条线吗？
-
@JohnnyMopp 以下行是发生错误的地方。 if (!FileTimeToSystemTime(&fad.ftCreationTime, &st)) { std::wstring error(L"Error getting created Time");返回错误.c_str(); // 错误情况，可以调用 GetLastError 了解更多信息 }
-
@JohnnyMopp 将它放在 If 语句中现在可以避免崩溃，但我无法获得错误代码。我调用 GetLastErrorAsString() 但它没有返回错误。我真正想要的只是一种检索文件创建时间戳的方法。
-
您正在返回一个指向错误字符串的指针，该错误字符串在您从函数返回后已被销毁。不要那样做！我建议返回
std::wstring而不是const wchar_t*
标签： c++