Qt-获取EXE版本信息（Qt5+win10）(LPCWSTR、std::wstring)
相关资料：
https://blog.csdn.net/scz653037148/article/details/83307252 Qt 获取exe版本等详细信息
https://blog.csdn.net/qq_33233768/article/details/81665275 QString与std::wstring的转换问题
https://download.csdn.net/download/zhujianqiangqq/72408654 CSDN代码包下载
代码：
.pro
1 QT += core gui 2 3 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets 4 5 CONFIG += c++11 6 7 # The following define makes your compiler emit warnings if you use 8 # any Qt feature that has been marked deprecated (the exact warnings 9 # depend on your compiler). Please consult the documentation of the 10 # deprecated API in order to know how to port your code away from it. 11 DEFINES += QT_DEPRECATED_WARNINGS 12 13 # You can also make your code fail to compile if it uses deprecated APIs. 14 # In order to do so, uncomment the following line. 15 # You can also select to disable deprecated APIs only up to a certain version of Qt. 16 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 17 18 SOURCES += \ 19 main.cpp \ 20 mainwindow.cpp 21 22 HEADERS += \ 23 mainwindow.h 24 25 FORMS += \ 26 mainwindow.ui 27 28 #LIBS += -lUser32 29 LIBS += -lVersion 30 31 # Default rules for deployment. 32 qnx: target.path = /tmp/$${TARGET}/bin 33 else: unix:!android: target.path = /opt/$${TARGET}/bin 34 !isEmpty(target.path): INSTALLS += target
main.h
1 #include "mainwindow.h" 2 3 #include4 5 int main(int argc, char *argv[]) 6 { 7 QApplication a(argc, argv); 8 MainWindow w; 9 w.show(); 10 return a.exec(); 11 }
mainwindow.h
1 #ifndef MAINWINDOW_H 2 #define MAINWINDOW_H 3 4 #include5 #include "winver.h" 6 #include 7 #include 8 9 using namespace std; 10 11 QT_BEGIN_NAMESPACE 12 namespace Ui { class MainWindow; } 13 QT_END_NAMESPACE 14 15 class MainWindow : public QMainWindow 16 { 17 Q_OBJECT 18 19 public: 20 MainWindow(QWidget *parent = nullptr); 21 ~MainWindow(); 22 23 private slots: 24 void on_pushButton_clicked(); 25 26 private: 27 Ui::MainWindow *ui; 28 }; 29 #endif // MAINWINDOW_H
mainwindow.cpp
1 #include "mainwindow.h" 2 #include "ui_mainwindow.h" 3 4 MainWindow::MainWindow(QWidget *parent) 5 : QMainWindow(parent) 6 , ui(new Ui::MainWindow) 7 { 8 ui->setupUi(this); 9 } 10 11 MainWindow::~MainWindow() 12 { 13 delete ui; 14 } 15 16 std::wstring qToStdWString(const QString &str) 17 { 18 #ifdef _MSC_VER 19 return std::wstring((const wchar_t *)str.utf16()); 20 #else 21 return str.toStdWString(); 22 #endif 23 } 24 25 QString GetFileVertion(QString fullName){ 26 DWORD dwLen = 0; 27 char* lpData=NULL; 28 LPCWSTR str_path; 29 std::wstring ss = qToStdWString(fullName); 30 str_path = ss.c_str(); 31 BOOL bSuccess = FALSE; 32 QString fileInfomation; 33 DWORD vHandle=0; 34 //获得文件基础信息 【Q tea 原创】 35 //-------------------------------------------------------- 36 dwLen = GetFileVersionInfoSize( str_path, &vHandle); 37 qDebug()<<"GetLastError:" << GetLastError(); 38 if (0 == dwLen) 39 { 40 qDebug()<<"获取版本字节信息失败!"; 41 return""; 42 } 43 qDebug()<<"版本信息字节大小："<<dwLen; 44 lpData =(char*)malloc(dwLen+1); 45 if (NULL == lpData) 46 { 47 qDebug()<<"分配内存失败"; 48 return ""; 49 } 50 bSuccess = GetFileVersionInfo( fullName.toStdWString().c_str(),0, dwLen+1, lpData); 51 if (!bSuccess) 52 { 53 qDebug()<<"获取文件版本信息错误!"; 54 55 return""; 56 } 57 LPVOID lpBuffer = NULL; 58 UINT uLen = 0; 59 60 //获得语言和代码页(language and code page),规定，套用即可 61 //--------------------------------------------------- 62 bSuccess = VerQueryValue( lpData, 63 (TEXT("\\VarFileInfo\\Translation")), 64 &lpBuffer, 65 &uLen); 66 QString strTranslation,str1,str2; 67 unsigned short int *p =(unsigned short int *)lpBuffer; 68 str1.setNum(*p,16); 69 str1="000"+ str1; 70 strTranslation+= str1.mid(str1.size()-4,4); 71 str2.setNum(*(++p),16); 72 str2="000"+ str2; 73 strTranslation+= str2.mid(str2.size()-4,4); 74 75 QString str_value; 76 QString code; 77 //以上步骤需按序进行，以下步骤可根据需要增删或者调整 78 79 //获得文件说明：FileDescription 80 //--------------------------------------------------------- 81 code ="\\StringFileInfo\\"+ strTranslation +"\\FileDescription"; 82 bSuccess = VerQueryValue(lpData, 83 (code.toStdWString().c_str()), 84 &lpBuffer, 85 &uLen); 86 if (!bSuccess) 87 { 88 qDebug()<<"Get file verstion error!"; 89 } 90 else 91 { 92 str_value="文件说明：" + QString::fromUtf16((const unsigned short int *)lpBuffer)+"\n"; 93 fileInfomation +=str_value; 94 } 95 //获得文件版本信息：FileVersion 96 //----------------------------------------------------- 97 code ="\\StringFileInfo\\"+ strTranslation +"\\FileVersion"; 98 bSuccess = VerQueryValue(lpData, 99 (code.toStdWString().c_str()), 100 &lpBuffer, 101 &uLen); 102 if (!bSuccess) 103 { 104 qDebug()<<"获取文件版本信息错误!"; 105 106 } 107 else 108 { 109 str_value="文件版本信息：" + QString::fromUtf16((const unsigned short int *)lpBuffer)+"\n"; 110 fileInfomation +=str_value; 111 } 112 //获得文件产品名称 113 //--------------------------------------------------------- 114 code ="\\StringFileInfo\\"+ strTranslation +"\\ProductName"; 115 bSuccess = VerQueryValue(lpData, 116 (code.toStdWString().c_str()), 117 &lpBuffer, 118 &uLen); 119 if (!bSuccess) 120 { 121 qDebug()<<"Get file ProductName error!"; 122 123 } 124 else 125 { 126 str_value="产品名称：" + QString::fromUtf16((const unsigned short int *)lpBuffer)+"\n"; 127 fileInfomation +=str_value; 128 } 129 //获得产品版本信息：ProductVersion 130 //----------------------------------------------------- 131 code ="\\StringFileInfo\\"+ strTranslation +"\\ProductVersion"; 132 bSuccess = VerQueryValue(lpData, 133 (code.toStdWString().c_str()), 134 &lpBuffer, 135 &uLen); 136 if (!bSuccess) 137 { 138 qDebug()<<"获取产品版本信息错误!"; 139 140 } 141 else 142 { 143 str_value="产品版本信息：" + QString::fromUtf16((const unsigned short int *)lpBuffer)+"\n"; 144 fileInfomation +=str_value; 145 } 146 //获得文件内部名称 InternalName 147 //--------------------------------------------------------- 148 code ="\\StringFileInfo\\"+ strTranslation +"\\InternalName"; 149 bSuccess = VerQueryValue(lpData, 150 (code.toStdWString().c_str()), 151 &lpBuffer, 152 &uLen); 153 if (!bSuccess) 154 { 155 qDebug()<<"Get file InternalName error!"; 156 157 } 158 else 159 { 160 str_value="内部名称：" + QString::fromUtf16((const unsigned short int *)lpBuffer)+"\n"; 161 fileInfomation +=str_value; 162 } 163 164 165 //获得原始文件名 OriginalFileName 166 //--------------------------------------------------------- 167 code ="\\StringFileInfo\\"+ strTranslation +"\\OriginalFileName"; 168 bSuccess = VerQueryValue(lpData, 169 (code.toStdWString().c_str()), 170 &lpBuffer, 171 &uLen); 172 if (!bSuccess) 173 { 174 qDebug()<<"Get file OriginalFileName error!"; 175 176 } 177 else 178 { 179 str_value="原始文件名：" + QString::fromUtf16((const unsigned short int *)lpBuffer)+"\n"; 180 fileInfomation +=str_value; 181 } 182 //获得合法版权 LegalTradeMarks 【Q tea 原创】 183 //--------------------------------------------------------- 184 code ="\\StringFileInfo\\"+ strTranslation +"\\Type"; 185 bSuccess = VerQueryValue( lpData, 186 (code.toStdWString().c_str()), 187 &lpBuffer, 188 &uLen); 189 if (!bSuccess) 190 { 191 qDebug()<<"Get file LegalTradeMarks error!"; 192 193 194 } 195 else 196 { 197 str_value="版权：" + QString::fromUtf16((const unsigned short int *)lpBuffer)+"\n"; 198 fileInfomation +=str_value; 199 } 200 201 delete lpData; 202 203 return fileInfomation; 204 } 205 206 void MainWindow::on_pushButton_clicked() 207 { 208 ui->textEdit->append(GetFileVertion(QString("D:/vrtsconApp.exe"))); 209 }
问题描述：
在qt工程中调用QString::fromStdWString()时，老是报错error LNK2019: 无法解析的外部符号...QString::fromStdWString(...)...
原因：
在Qt库中 wchar_t 不是内置类型，所以QT建议我们构建基于Qt的软件时，也不要将wchar_t作为内置类型。但是在一些情况下，其他的库构建时可能已经将wchar_t作为了内置类型。当使用std::wstring、QString::toStdWString()和String::fromStdWString() 将导致链接错误.
解决方案：
QString转成std::wstring：
/*! Convert an QString to a std::wstring */
std::wstring qToStdWString(const QString &str)
{
#ifdef _MSC_VER
return std::wstring((const wchar_t *)str.utf16());
#else
return str.toStdWString();
#endif
}
std::wstring转成QString：
/*! Convert an std::wstring to a QString */
QString stdWToQString(const std::wstring &str)
{
#ifdef _MSC_VER
return QString::fromUtf16((const ushort *)str.c_str());
#else
return QString::fromStdWString(str);
#endif