Qt SQLServerHelper 用QSqlQuery 和 QSqlDatabase 实现

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原创最新推荐文章于 2026-02-23 00:02:18 发布 994 阅读 AI 写同款· GEO 优化 ›

在网上找了很多SQLServer的封装类, 自己重新实现了一下

参考的网址:

这个是一个数据库操作的类, 包含基本的打开关闭curd

这个是参考实现count, 在迭代器里增加了一个int变量用于计数

Qt版本 4.8.6

1. 文档结构

2. .pro

这里要增加 Qt += sql

#-------------------------------------------------

# Project created by QtCreator 2018-06-12T10:23:08

#-------------------------------------------------

QT       += core

QT       -= gui

QT       += sql

TARGET = SQLServerDemo

CONFIG   += console

CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp \

    sqlserverhelper.cpp

HEADERS += \

    sqlserverhelper.h

3. main.cpp

这里实现的功能是查询计数和插入记录

#include <QtCore/QCoreApplication>

#include "sqlserverhelper.h"

#include <QDebug>

void SQLServerTest()

    SQLServerHelper *sqlServerHelper = new SQLServerHelper();

    sqlServerHelper->open();

    QString sqlCommand = "SELECT * FROM DeviceStatus WHERE DeviceCode = '001'";

    int count = sqlServerHelper->count(sqlCommand);

    qDebug() << count;

    sqlCommand =

            "INSERT INTO [dbo].[DeviceStatus]([DeviceCode], [DeviceStaTime], [DeviceStaCode], [DeviceErrCode]) VALUES ('004', '', '001', '');";

    int result = sqlServerHelper->query(sqlCommand);

    qDebug() << result;

    sqlServerHelper->close();

int main(int argc, char *argv[])

    QCoreApplication a(argc, argv);

    SQLServerTest();

    return a.exec();

4. SQLServer封装类

sqlserverhelper.h

#ifndef SQLSERVERHELPER_H

#define SQLSERVERHELPER_H

#include <QtSql/QSqlDatabase>

class SQLServerHelper

public:

    SQLServerHelper();

    QSqlDatabase sqlserver_db;

    QSqlDatabase db;

    void open();

    void close();

    int count(QString sqlCommand);

    int query(QString sqlCommand);

};

#endif // SQLSERVERHELPER_H

sqlserverhelper.cpp

#include "sqlserverhelper.h"

#include <QDebug>

#include <QtSql/QSqlQuery>

SQLServerHelper::SQLServerHelper()

    QString connectionTemplate = "DRIVER={SQL SERVER};SERVER=%1;DATABASE=%2;";

    QString server = "127.0.0.1";

    QString dbName = "db";

    QString user = "sa";

    QString password = "1";

    QString connectionString = connectionTemplate.arg(server).arg(dbName);

    db = QSqlDatabase::addDatabase("QODBC");

    db.setDatabaseName(connectionString);

    db.setUserName(user);

    db.setPassword(password);

void SQLServerHelper::open()

    if (db.open())

        qDebug("sqlserver connect successfully.");

    else

        qDebug("sqlserver connect failed.");

void SQLServerHelper::close()

    db.commit();

    db.close();

int SQLServerHelper::count(QString sqlCommand)

    QSqlQuery query(db);

    query.prepare(sqlCommand);

    int recCount = 0;

    if(query.exec())

        while(query.next())

            recCount ++;

    return recCount;

int SQLServerHelper::query(QString sqlCommand)

    QSqlQuery query(db);

    query.prepare(sqlCommand);

    if(query.exec())

        qDebug() << "execute successfully.";

        return 1;

    else

        qDebug() << "execute failed.";

        return 0;

ok. 这样就可以实现简单的功能了, 以后添加再更新..... 2018/06/12

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#SQLServer #Qt #QSqlQuery #QSqlDatabase