Qt数据库应用之实现通用数据库分页

#include "frmdbpage.h" #include "ui_frmdbpage.h" #include "quihelper.h" #include "dbconnthread.h" #include "dbpage.h" #include "dbdelegate.h" frmDbPage::frmDbPage(QWidget *parent) : QWidget(parent), ui(new Ui::frmDbPage) { ui->setupUi(this); this->initForm(); this->initConfig(); } frmDbPage::~frmDbPage() { delete ui; } void frmDbPage::initForm() { ui->frame->setFixedWidth(AppConfig::RightWidth); QUIHelper::initTableView(ui->tableView); //实例化数据库通信类 dbConn = new DbConnThread(this); dbConn->setDbFlag("分页"); //实例化翻页类 dbPage = new DbPage(this); //关联查询记录总数 connect(dbConn, SIGNAL(receiveCount(QString, int, int)), dbPage, SLOT(receiveCount(QString, int, int))); dbPage->setAllCenter(true); dbPage->setRecordsPerpage(30); dbPage->setWhereSql("where 1=1"); //分页导航控件 connect(ui->navPage, SIGNAL(selectPage(int)), dbPage, SLOT(selectPage(int))); connect(dbPage, SIGNAL(receivePage(quint32, quint32, quint32, quint32)), ui->navPage, SLOT(receivePage(quint32, quint32, quint32, quint32))); QLabel *labInfo = ui->navPage->getLabInfo(); QList btns = ui->navPage->getBtnAll(); dbPage->setControl(ui->tableView, ui->labPageTotal, 0, ui->labRecordsTotal, 0, ui->labSelectTime, labInfo, btns.at(0), btns.at(1), btns.at(2), btns.at(3)); //采用系统默认的样式并设置按钮固定尺寸 ui->navPage->setShowStyle(false); ui->navPage->setShowGoPage(true); foreach (QPushButton *btn, btns) { btn->setFixedWidth(50); } } void frmDbPage::initConfig() { ui->cboxDbType->addItems(DbHelper::getDbType()); ui->cboxDbType->setCurrentIndex(ui->cboxDbType->findText(AppConfig::DbType4)); connect(ui->cboxDbType, SIGNAL(currentIndexChanged(int)), this, SLOT(saveConfig())); ui->txtDbName->setText(AppConfig::DbName4); connect(ui->txtDbName, SIGNAL(textChanged(QString)), this, SLOT(saveConfig())); ui->txtHostName->setText(AppConfig::HostName4); connect(ui->txtHostName, SIGNAL(textChanged(QString)), this, SLOT(saveConfig())); ui->txtHostPort->setText(QString::number(AppConfig::HostPort4)); connect(ui->txtHostPort, SIGNAL(textChanged(QString)), this, SLOT(saveConfig())); ui->txtUserName->setText(AppConfig::UserName4); connect(ui->txtUserName, SIGNAL(textChanged(QString)), this, SLOT(saveConfig())); ui->txtUserPwd->setText(AppConfig::UserPwd4); connect(ui->txtUserPwd, SIGNAL(textChanged(QString)), this, SLOT(saveConfig())); ui->txtColumnName->setText(AppConfig::ColumnName4); connect(ui->txtColumnName, SIGNAL(textChanged()), this, SLOT(saveConfig())); ui->txtColumnWidth->setText(AppConfig::ColumnWidth4); connect(ui->txtColumnWidth, SIGNAL(textChanged()), this, SLOT(saveConfig())); ui->txtCountName->setText("LogID"); ui->txtOrderSql->setText("LogID asc"); } void frmDbPage::saveConfig() { AppConfig::DbType4 = ui->cboxDbType->currentText(); AppConfig::DbName4 = ui->txtDbName->text(); AppConfig::HostName4 = ui->txtHostName->text(); AppConfig::HostPort4 = ui->txtHostPort->text().toInt(); AppConfig::UserName4 = ui->txtUserName->text(); AppConfig::UserPwd4 = ui->txtUserPwd->text(); AppConfig::ColumnName4 = ui->txtColumnName->toPlainText(); AppConfig::ColumnWidth4 = ui->txtColumnWidth->toPlainText(); AppConfig::writeConfig(); } void frmDbPage::on_btnOpen_clicked() { if (ui->btnOpen->text() == "打开数据库") { DbInfo dbInfo; dbInfo.connName = this->objectName(); dbInfo.dbName = AppConfig::DbName4; dbInfo.hostName = AppConfig::HostName4; dbInfo.hostPort = AppConfig::HostPort4; dbInfo.userName = AppConfig::UserName4; dbInfo.userPwd = AppConfig::UserPwd4; QString dbType = AppConfig::DbType4.toUpper(); if (dbType == "SQLITE") { dbInfo.dbName = DbHelper::getDbDefaultFile(); } dbConn->setConnInfo(DbHelper::getDbType(dbType), dbInfo); if (dbConn->openDb()) { dbConn->start(); ui->btnOpen->setText("关闭数据库"); } else { QString error = dbConn->getDatabase().lastError().text(); QUIHelper::showMessageBoxError("打开数据库失败!\n" + error, 3); } } else { dbConn->stop(); dbConn->closeDb(); ui->btnOpen->setText("打开数据库"); dbPage->clear(); } QTimer::singleShot(100, this, SLOT(getTables())); QTimer::singleShot(1000, this, SLOT(on_btnDo_clicked())); } void frmDbPage::on_btnCopy_clicked() { //将数据库设置参数一键粘贴过来 ui->cboxDbType->setCurrentIndex(ui->cboxDbType->findText(AppConfig::LocalDbType)); ui->txtDbName->setText(AppConfig::LocalDbName); ui->txtHostName->setText(AppConfig::LocalHostName); ui->txtHostPort->setText(QString::number(AppConfig::LocalHostPort)); ui->txtUserName->setText(AppConfig::LocalUserName); ui->txtUserPwd->setText(AppConfig::LocalUserPwd); } void frmDbPage::getTables() { if (!dbConn->getOk()) { return; } //取出数据库对应的表集合 QStringList tables = dbConn->getDatabase().tables(); ui->cboxTables->clear(); ui->cboxTables->addItems(tables); if (tables.contains("LogInfo")) { ui->cboxTables->setCurrentIndex(ui->cboxTables->findText("LogInfo")); } } void frmDbPage::on_btnDo_clicked() { if (!dbConn->getOk()) { return; } //表格字段 名称+宽度 QList columnNames = AppConfig::ColumnName4.split(","); QList columnWidths; QStringList listWidth = AppConfig::ColumnWidth4.split(","); foreach (QString width, listWidth) { columnWidths << width.toInt(); } //具体函数解释参见对应类头文件 //不设置字段中文名和宽度也行,默认取数据库字段名 dbPage->setColumnNames(columnNames); dbPage->setColumnWidths(columnWidths); dbPage->setDbType(AppConfig::DbType4); dbPage->setConnName(dbConn->getDatabase().connectionName()); QString tableName = ui->cboxTables->currentText(); QString countName = ui->txtCountName->text(); QString orderSql = ui->txtOrderSql->text(); dbPage->setTableName(tableName); dbPage->setOrderSql(orderSql); dbPage->select(); dbConn->selectCount(tableName, countName, "where 1=1"); } void frmDbPage::on_cboxTables_currentIndexChanged(int) { QString table = ui->cboxTables->currentText(); QSqlRecord records = dbConn->getDatabase().record(table); ui->cboxRecords->clear(); for (int i = 0; i cboxRecords->addItem(records.fieldName(i)); } } void frmDbPage::on_cboxRecords_currentIndexChanged(int) { QString record = ui->cboxRecords->currentText(); ui->txtCountName->setText(record); ui->txtOrderSql->setText(record + " asc"); }