基於Qt5.5.0的sql,C++備忘錄軟件的編寫

時間 2019-11-18

原文原文鏈接

個人第一個軟件。html

基於Qt5.5.0的 sql ,C++備忘錄軟件version1.0的編寫ios

我用的Qt版本是5.5.0免配置編譯器的版本，這裏附上我使用的軟件下載地址：http://download.qt.io/official_releases/qt/5.5/5.5.0/ 下載 qt-opensource-windows-x86-mingw492-5.5.0.exe便可。web

話很少說，第一先是基於Qt5.5.0的sql的配置，這裏詳見個人另一篇博客：http://www.cnblogs.com/xiaobo-Linux/p/4674986.htmlsql

此時，sql環境配置好，編寫代碼。數據庫

附上個人代碼：windows

++++++++++++++++++project.pro裏面的代碼++++++++++++++++app

#-------------------------------------------------
#
# Project created by QtCreator 2015-07-21T13:12:40
#
#-------------------------------------------------

QT       += core gui
QT += sql           # 引用數據庫
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = project3
TEMPLATE = app


SOURCES += main.cpp\
        reminder.cpp

HEADERS  += reminder.h

FORMS    += reminder.ui
 #DESTDIR += C://   # 編譯文件輸出路徑,不加此句默認在工程文件下建立.db
RC_FILE=icon.rc  #添加軟件圖標

+++++++++++++++++++reminder.h的頭文件代碼+++++++++++++++++++++++函數

#ifndef REMINDER_H
#define REMINDER_H



#include <QMainWindow>
#include <QSqlDatabase> //數據庫類
#include <QSqlQuery>    //執行語句類
//#include <QSqlRecord>   //返回記錄類
#include <QtSql>
#include <QApplication>
#include <QMessageBox>
#include <iostream>
//#include <QtDebug>



namespace Ui {
class Reminder;

}

class Reminder : public QMainWindow
{
    Q_OBJECT



public:
    explicit Reminder(QWidget *parent = 0);
    ~Reminder();


private slots:




   void on_save_clicked();


   void on_del_clicked();

   void select();


   void on_search_clicked();

   void on_back_clicked();

private:
    Ui::Reminder *ui;
    QSqlDatabase db;            //聲明數據庫類

};


#endif // REMINDER_H

++++++++++++++++++++++++main.cpp代碼+++++++++++++++++++++++++++++ui

#include "reminder.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    //建立DB文件，建立表格
    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
    std::cout<<"begin sqlite"<<std::endl;
    db.setDatabaseName("reminder.db");
    if ( !db.open()){
    QMessageBox::critical(NULL, QObject::tr("Collection"), QObject::tr("failed to connect to database!"));
    return 0;
    }
    QSqlQuery query;
    query.exec("create table reminder (id integer PRIMARY KEY AUTOINCREMENT,主題 text,內容 text)");


    Reminder w;
    w.show();

    return a.exec();
}

+++++++++++++++++reminder.cpp代碼+++++++++++++++++this

#include "reminder.h"
#include "ui_reminder.h"

 Reminder::Reminder(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::Reminder)
{
    ui->setupUi(this);
    setWindowTitle("小波的提醒備忘錄V1.0");
  setWindowIcon(QIcon("xiaobo.ico"));//設置軟件圖標
    select();//顯示錶格

}

Reminder::~Reminder()
{
    db.close();
    delete ui;
}


void Reminder::on_save_clicked()
{
  QSqlQuery query;
  query.prepare("insert into reminder (id,主題,內容)values(1:theme , :content )"); //id自動增長，先從1起，以後無需手動插入

  query.prepare("insert into reminder (主題,內容)values(:theme , :content )");



  query.bindValue(":theme",ui->textEdit->text());            //從輸入框插入數據
  query.bindValue(":content",ui->textEdit_2->toPlainText());
  query.exec();

   select();//顯示錶格


}

void Reminder::on_del_clicked()
{
    QSqlQuery query;

    int curRow = ui->tableView->currentIndex().row();     //鼠標選擇刪除第幾行

    QModelIndex index = ui->tableView->currentIndex();

    int id=index.sibling(curRow,0).data().toInt();

    query.prepare("delete from reminder where id = :id");

    query.bindValue(":id",id);

    query.exec();
    select();

 }

void Reminder::select()
{  //將sql表格顯示到tableView裏
 QSqlQueryModel *model = new QSqlQueryModel(ui->tableView);
 model->setQuery(QString("select *from reminder"));
 model->setHeaderData(0,Qt::Horizontal,QObject::tr("ID"));
 model->setHeaderData(1,Qt::Horizontal,QObject::tr("主題"));
 model->setHeaderData(2,Qt::Horizontal,QObject::tr("內容"));
 ui->tableView->setModel(model);
}

 void Reminder::on_search_clicked()
 {    QSqlQuery query;
     ui -> tableView -> clearSpans(); //tableview清空
     QSqlQueryModel *model = new QSqlQueryModel(ui->tableView);

      query.prepare("select  *from reminder where 主題 = :theme ");  //like模糊查詢沒成功
      query.bindValue(":theme",ui->textEdit_3->text());

      query.exec();


      model->setQuery(query);



       model->setHeaderData(0,Qt::Horizontal,QObject::tr("ID"));
       model->setHeaderData(1,Qt::Horizontal,QObject::tr("主題"));
       model->setHeaderData(2,Qt::Horizontal,QObject::tr("內容"));

        ui->tableView->setModel(model);
 }

  void Reminder::on_back_clicked()

    {
       select();

    }