一、需求背景

获取软件下依赖的dll库的版本信息，如下图所示版本为1.0.7.1018

二、实现方法

2.1步骤

windows下实现，基于version.lib(version.dll)提供的函数获取这些信息

1. 首先使用GetFileVersionInfoSizeA(W)获取VersionInfo的大小，申请缓冲区；

2. 接着使用GetFileVersionInfoA(W)获取VersionInfo数据到缓冲区；

3. 接着使用VerQueryValueA(W)依次获取\，\VarFileInfo\Translation，再根据Translation获取语言类型，接着\VarFileInfo\080404B0\ProductVersion便获取到了版本信息。

参考：https://www.cnblogs.com/comor/p/10607383.html

2.2 源码

#include <QDebug>
#include <string>
#include <tchar.h>
#include <iostream>
#include <windows.h>BOOL GetFileInfoStringWinApi(LPCTSTR pFileName, LPCTSTR pName /* = NULL */, LPTSTR ptBuf, UINT lenBuf)
{DWORD   dwDummyHandle = 0; // will always be set to zeroDWORD   dwLen = 0;BYTE    *pVersionInfo = NULL;BOOL    bRetVal;VS_FIXEDFILEINFO    FileVersion;HMODULE        hVerDll;hVerDll = LoadLibrary(_T("VERSION.dll"));if (hVerDll == NULL){return FALSE;}#ifdef _UNICODEtypedef DWORD(WINAPI * Fun_GetFileVersionInfoSize)(LPCTSTR, DWORD *);typedef BOOL(WINAPI * Fun_GetFileVersionInfo)(LPCTSTR, DWORD, DWORD, LPVOID);typedef BOOL(WINAPI * Fun_VerQueryValue)(LPCVOID, LPCTSTR, LPVOID, PUINT);
#elsetypedef DWORD(WINAPI * Fun_GetFileVersionInfoSize)(LPCSTR, DWORD *);typedef BOOL(WINAPI * Fun_GetFileVersionInfo)(LPCSTR, DWORD, DWORD, LPVOID);typedef BOOL(WINAPI * Fun_VerQueryValue)(LPCVOID, LPCSTR, LPVOID, PUINT);
#endifFun_GetFileVersionInfoSize        pGetFileVersionInfoSize;Fun_GetFileVersionInfo            pGetFileVersionInfo;Fun_VerQueryValue                pVerQueryValue;#ifdef _UNICODEpGetFileVersionInfoSize = (Fun_GetFileVersionInfoSize)::GetProcAddress(hVerDll, "GetFileVersionInfoSizeW");pGetFileVersionInfo = (Fun_GetFileVersionInfo)::GetProcAddress(hVerDll, "GetFileVersionInfoW");pVerQueryValue = (Fun_VerQueryValue)::GetProcAddress(hVerDll, "VerQueryValueW");
#elsepGetFileVersionInfoSize = (Fun_GetFileVersionInfoSize)::GetProcAddress(hVerDll, "GetFileVersionInfoSizeA");pGetFileVersionInfo = (Fun_GetFileVersionInfo)::GetProcAddress(hVerDll, "GetFileVersionInfoA");pVerQueryValue = (Fun_VerQueryValue)::GetProcAddress(hVerDll, "VerQueryValueA");
#endifstruct TRANSLATION{WORD langID;            // language IDWORD charset;            // character set (code page)} Translation;Translation.langID = 0x0409;    //Translation.charset = 1252;        // default = ANSI code pagedwLen = pGetFileVersionInfoSize(pFileName, &dwDummyHandle);if (dwLen == 0){bRetVal = FALSE;goto End;}pVersionInfo = new BYTE[dwLen]; // allocate version infobRetVal = pGetFileVersionInfo(pFileName, 0, dwLen, pVersionInfo);if (bRetVal == FALSE){goto End;}VOID     *pVI;UINT    uLen;bRetVal = pVerQueryValue(pVersionInfo, _T("\\"), &pVI, &uLen);if (bRetVal == FALSE){goto End;}memcpy(&FileVersion, pVI, sizeof(VS_FIXEDFILEINFO));bRetVal = pVerQueryValue(pVersionInfo, _T("\\VarFileInfo\\Translation"),&pVI, &uLen);if (bRetVal && uLen >= 4){memcpy(&Translation, pVI, sizeof(TRANSLATION));}else{bRetVal = FALSE;goto End;}//  BREAKIF(FileVersion.dwSignature != VS_FFI_SIGNATURE);if (FileVersion.dwSignature != VS_FFI_SIGNATURE){bRetVal = FALSE;goto End;}VOID        *pVal;UINT        iLenVal;if (pName == NULL){_stprintf_s(ptBuf, lenBuf, _T("%d.%d.%d.%d"),HIWORD(FileVersion.dwFileVersionMS), LOWORD(FileVersion.dwFileVersionMS),HIWORD(FileVersion.dwFileVersionLS), LOWORD(FileVersion.dwFileVersionLS));}else{TCHAR    szQuery[1024];_stprintf_s(szQuery, 1024, _T("\\StringFileInfo\\%04X%04X\\%s"),Translation.langID, Translation.charset, pName);bRetVal = pVerQueryValue(pVersionInfo, szQuery, &pVal, &iLenVal);if (bRetVal){_stprintf_s(ptBuf, lenBuf, _T("%s"), (TCHAR *)pVal);}else{_stprintf_s(ptBuf, lenBuf, _T("%s"), _T(""));}}End:FreeLibrary(hVerDll);hVerDll = NULL;delete[] pVersionInfo;pVersionInfo = NULL;return bRetVal;
}bool GetFileInfoString(const QString &fileName, const QString &name, QString &value)
{TCHAR *ptszStr = NULL;ptszStr = new TCHAR[1024];LPCWSTR fileName_wstr = reinterpret_cast<LPCWSTR>(fileName.data());LPCWSTR name_wstr = reinterpret_cast<LPCWSTR>(name.data());BOOL bRet = GetFileInfoStringWinApi(fileName_wstr, name_wstr, ptszStr, 1024);value = QString::fromWCharArray(ptszStr);delete ptszStr;ptszStr = NULL;return bRet;
}QString GetFileProductVersion(const QString &fileName)
{QString version;GetFileInfoString(fileName, "ProductVersion", version);return version;
}

2.3 测试结果

int main(int argc, char *argv[])
{QString fileName = "xxx//CZVisionCameraOperator.dll";qDebug() << GetFileProductVersion(fileName);return 0;
}

2.4 扩展

除版本信息，还可以获取文件说明、产品名称、版权、公司名称、原始文件名称等

FileDescription 文件说明

FileVersion 文件版本

ProductName 产品名称

ProductVersion 产品版本

LegalCopyright 版权

CompanyName 公司名称

OriginalFilename 原始文件名