新增数据库翻页查询
feiyangqingyun
parent
1a270bd1a5
commit
4971dd5e30
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@ -18,3 +18,4 @@ Qt编写的一些开源的demo，包括串口调试助手、网络调试助手
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| 12 | framelesswidget | 通用无边框拖动拉伸类 |
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| 13 | ipaddress | IP地址输入控件 |
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| 14 | bgdemo | 无边框背景透明窗体 |
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| 15 | dbpage | 通用数据库翻页查询 |
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#include "dbpage.h"
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SqlQueryModel::SqlQueryModel(QObject *parent) : QSqlQueryModel(parent)
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{
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allCenter = false;
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alignCenterColumn.clear();
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alignRightColumn.clear();
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}
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QVariant SqlQueryModel::data(const QModelIndex &index, int role) const
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{
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QVariant value = QSqlQueryModel::data(index, role);
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if (allCenter) {
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if(role == Qt::TextAlignmentRole ) {
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value = Qt::AlignCenter;
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}
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} else {
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//逐个从列索引中查找是否当前列在其中
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int column = index.column();
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bool existCenter = alignCenterColumn.contains(column);
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bool existRight = alignRightColumn.contains(column);
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if(role == Qt::TextAlignmentRole) {
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if (existCenter) {
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value = Qt::AlignCenter;
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}
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if (existRight) {
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value = (QVariant)(Qt::AlignVCenter | Qt::AlignRight);
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}
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}
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}
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return value;
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}
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void SqlQueryModel::setAllCenter(bool allCenter)
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{
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this->allCenter = allCenter;
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}
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void SqlQueryModel::setAlignCenterColumn(const QList<int> &alignCenterColumn)
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{
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this->alignCenterColumn = alignCenterColumn;
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}
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void SqlQueryModel::setAlignRightColumn(const QList<int> &alignRightColumn)
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{
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this->alignRightColumn = alignRightColumn;
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}
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DbCountThread::DbCountThread(QObject *parent) : QThread(parent)
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{
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connName = "qt_sql_default_connection";
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sql = "select 1";
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connect(this, SIGNAL(finished()), this, SLOT(deleteLater()));
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}
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void DbCountThread::run()
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{
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//计算用时
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QDateTime dtStart = QDateTime::currentDateTime();
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QSqlQuery query(QSqlDatabase::database(connName));
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query.exec(sql);
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query.next();
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int count = query.value(0).toUInt();
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QDateTime dtEnd = QDateTime::currentDateTime();
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double msec = dtStart.msecsTo(dtEnd);
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emit receiveCount(count, msec);
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}
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void DbCountThread::setConnName(const QString &connName)
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{
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this->connName = connName;
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}
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void DbCountThread::setSql(const QString &sql)
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{
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this->sql = sql;
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}
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QScopedPointer<DbPage> DbPage::self;
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DbPage *DbPage::Instance()
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{
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if (self.isNull()) {
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QMutex mutex;
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QMutexLocker locker(&mutex);
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if (self.isNull()) {
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self.reset(new DbPage);
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}
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}
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return self.data();
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}
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DbPage::DbPage(QObject *parent) : QObject(parent)
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{
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startIndex = 0;
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tempSql = "";
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sql = "";
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queryModel = new SqlQueryModel;
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pageCurrent = 1;
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pageCount = 0;
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resultCount = 0;
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resultCurrent = 0;
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labPageCount = 0;
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labPageCurrent = 0;
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labResultCount = 0;
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labResultCurrent = 0;
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labResult = 0;
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labInfo = 0;
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tableView = 0;
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btnFirst = 0;
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btnPre = 0;
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btnNext = 0;
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btnLast = 0;
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countName = "*";
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connName = "qt_sql_default_connection";
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dbType = DbType_Sqlite;
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pageCurrent = 0;
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pageCount = 0;
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resultCount = 0;
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resultCurrent = 30;
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tableName = "";
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selectColumn = "*";
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orderSql = "";
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whereSql = "";
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columnNames.clear();
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columnWidths.clear();
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insertColumnIndex = -1;
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insertColumnName = "";
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insertColumnWidth = 50;
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}
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void DbPage::bindData(const QString &columnName, const QString &orderColumn, const QString &tableName,
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QComboBox *cbox, const QString &connName)
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{
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QSqlQuery query(QSqlDatabase::database(connName));
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query.exec("select " + columnName + " from " + tableName + " order by " + orderColumn + " asc");
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while (query.next()) {
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cbox->addItem(query.value(0).toString());
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}
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}
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void DbPage::bindData(const QString &columnName, const QString &orderColumn, const QString &tableName,
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QList<QComboBox *> cboxs, const QString &connName)
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{
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QSqlQuery query(QSqlDatabase::database(connName));
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query.exec("select " + columnName + " from " + tableName + " order by " + orderColumn + " asc");
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while (query.next()) {
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foreach (QComboBox *cbox, cboxs) {
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cbox->addItem(query.value(0).toString());
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}
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}
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}
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void DbPage::bindData(const QString &sql)
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{
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queryModel->setQuery(sql, QSqlDatabase::database(connName));
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tableView->setModel(queryModel);
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//依次设置列标题列宽
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int columnCount = tableView->model()->columnCount();
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int nameCount = columnNames.count();
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columnCount = columnCount > nameCount ? nameCount : columnCount;
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QList<QString> columnNames = this->columnNames;
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QList<int> columnWidths = this->columnWidths;
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//根据设置添加新列,将对应新列的标题名称和宽度按照索引位置插
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if (insertColumnIndex >= 0) {
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columnCount++;
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columnNames.insert(insertColumnIndex, insertColumnName);
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columnWidths.insert(insertColumnIndex, insertColumnWidth);
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queryModel->insertColumn(insertColumnIndex);
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}
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//设置列标题和列宽度
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for (int i = 0; i < columnCount; i++) {
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queryModel->setHeaderData(i, Qt::Horizontal, columnNames.at(i));
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tableView->setColumnWidth(i, columnWidths.at(i));
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}
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if (labPageCurrent != 0) {
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labPageCurrent->setText(QString("第 %1 页").arg(pageCurrent));
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}
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if (labPageCount != 0) {
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labPageCount->setText(QString("共 %1 页").arg(pageCount));
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}
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if (labResultCount != 0) {
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labResultCount->setText(QString("共 %1 条").arg(resultCount));
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}
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if (labResultCurrent != 0) {
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labResultCurrent->setText(QString("每页 %1 条").arg(resultCurrent));
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}
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if (labInfo != 0) {
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labInfo->setText(QString("共 %1 条 每页 %2 条 共 %3 页 第 %4 页").arg(resultCount).arg(resultCurrent).arg(pageCount).arg(pageCurrent));
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}
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//发送结果信号
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emit receivePage(pageCurrent, pageCount, resultCount, resultCurrent);
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}
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void DbPage::slot_receiveCount(quint32 count, double msec)
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{
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if (labResult != 0) {
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labResult->setText(QString("查询用时 %1 秒").arg(QString::number(msec / 1000, 'f', 3)));
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}
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resultCount = count;
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int yushu = resultCount % resultCurrent;
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//不存在余数,说明是整行,例如300%5==0
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if (yushu == 0) {
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if (resultCount > 0 && resultCount < resultCurrent) {
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pageCount = 1;
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} else {
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pageCount = resultCount / resultCurrent;
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}
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} else {
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pageCount = (resultCount / resultCurrent) + 1;
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}
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//2014-10-9增加翻页按钮可用不可用处理,如果只有一页数据,则翻页按钮不可用
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if (pageCount <= 1) {
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btnFirst->setEnabled(false);
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btnLast->setEnabled(false);
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btnNext->setEnabled(false);
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btnPre->setEnabled(false);
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} else {
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btnFirst->setEnabled(true);
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btnLast->setEnabled(true);
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btnNext->setEnabled(true);
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btnPre->setEnabled(true);
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}
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tempSql = QString("select %1 from %2 %3 order by %4").arg(selectColumn).arg(tableName).arg(whereSql).arg(orderSql);
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sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent); //组织分页SQL语句
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bindData(sql);
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}
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void DbPage::first()
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{
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if (pageCount > 1) {
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startIndex = 0;
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pageCurrent = 1;
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sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent);
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bindData(sql);
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btnLast->setEnabled(true);
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btnNext->setEnabled(true);
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}
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btnFirst->setEnabled(false);
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btnPre->setEnabled(false);
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}
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void DbPage::previous()
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{
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if (pageCurrent > 1) {
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pageCurrent--;
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startIndex -= resultCurrent;
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sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent);
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bindData(sql);
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btnLast->setEnabled(true);
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btnNext->setEnabled(true);
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}
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if (pageCurrent == 1) {
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btnFirst->setEnabled(false);
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btnPre->setEnabled(false);
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}
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}
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void DbPage::next()
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{
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if (pageCurrent < pageCount) {
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pageCurrent++;
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startIndex += resultCurrent;
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sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent);
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bindData(sql);
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btnFirst->setEnabled(true);
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btnPre->setEnabled(true);
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}
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if (pageCurrent == pageCount) {
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btnLast->setEnabled(false);
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btnNext->setEnabled(false);
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}
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}
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void DbPage::last()
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{
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if (pageCount > 0) {
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startIndex = (pageCount - 1) * resultCurrent;
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pageCurrent = pageCount;
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sql = QString("%1 limit %2,%3;").arg(tempSql).arg(startIndex).arg(resultCurrent);
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bindData(sql);
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btnFirst->setEnabled(true);
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btnPre->setEnabled(true);
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}
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btnLast->setEnabled(false);
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btnNext->setEnabled(false);
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}
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//设置显示数据的表格控件,当前翻页信息的标签控件等
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void DbPage::setControl(QTableView *tableView,
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QLabel *labPageCount, QLabel *labPageCurrent,
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QLabel *labResultCount, QLabel *labResultCurrent,
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QLabel *labResult, QLabel *labInfo,
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QAbstractButton *btnFirst, QAbstractButton *btnPre,
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QAbstractButton *btnNext, QAbstractButton *btnLast,
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const QString &countName, const QString &connName)
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{
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this->tableView = tableView;
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this->labPageCount = labPageCount;
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this->labPageCurrent = labPageCurrent;
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this->labResultCount = labResultCount;
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this->labResultCurrent = labResultCurrent;
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this->labResult = labResult;
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this->labInfo = labInfo;
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this->btnFirst = btnFirst;
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this->btnPre = btnPre;
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this->btnNext = btnNext;
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this->btnLast = btnLast;
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this->countName = countName;
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this->connName = connName;
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this->tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
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//挂载翻页按钮事件
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connect(btnFirst, SIGNAL(clicked()), this, SLOT(first()));
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connect(btnPre, SIGNAL(clicked()), this, SLOT(previous()));
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connect(btnNext, SIGNAL(clicked()), this, SLOT(next()));
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connect(btnLast, SIGNAL(clicked()), this, SLOT(last()));
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}
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void DbPage::setConnName(const QString &connName)
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{
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this->connName = connName;
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}
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void DbPage::setDbType(const DbPage::DbType &dbType)
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{
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this->dbType = dbType;
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}
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void DbPage::setTableName(const QString &tableName)
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{
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this->tableName = tableName;
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}
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void DbPage::setSelectColumn(const QString &selectColumn)
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{
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this->selectColumn = selectColumn;
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}
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void DbPage::setOrderSql(const QString &orderSql)
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{
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this->orderSql = orderSql;
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}
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void DbPage::setWhereSql(const QString &whereSql)
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{
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this->whereSql = whereSql;
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}
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void DbPage::setResultCurrent(int resultCurrent)
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{
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this->resultCurrent = resultCurrent;
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}
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void DbPage::setColumnNames(const QList<QString> &columnNames)
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{
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this->columnNames = columnNames;
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}
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void DbPage::setColumnWidths(const QList<int> &columnWidths)
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{
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this->columnWidths = columnWidths;
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}
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void DbPage::setAllCenter(bool allCenter)
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{
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queryModel->setAllCenter(allCenter);
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}
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void DbPage::setAlignCenterColumn(const QList<int> &alignCenterColumn)
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{
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queryModel->setAlignCenterColumn(alignCenterColumn);
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}
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void DbPage::setAlignRightColumn(const QList<int> &alignRightColumn)
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{
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queryModel->setAlignRightColumn(alignRightColumn);
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}
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void DbPage::setInsertColumnIndex(int insertColumnIndex)
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{
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this->insertColumnIndex = insertColumnIndex;
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}
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void DbPage::setInsertColumnName(const QString &insertColumnName)
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{
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this->insertColumnName = insertColumnName;
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}
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void DbPage::setInsertColumnWidth(int insertColumnWidth)
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{
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this->insertColumnWidth = insertColumnWidth;
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}
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void DbPage::select()
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{
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//重置开始索引
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startIndex = 0;
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pageCurrent = 1;
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//假设只有一页
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slot_receiveCount(resultCurrent, 0);
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//全部禁用按钮,文本显示正在查询...
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btnFirst->setEnabled(false);
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btnLast->setEnabled(false);
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btnNext->setEnabled(false);
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btnPre->setEnabled(false);
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QString info = "正在查询...";
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if (labInfo != 0) {
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labInfo->setText(info);
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}
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if (labPageCurrent != 0) {
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labPageCurrent->setText(info);
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}
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if (labPageCount != 0) {
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labPageCount->setText(info);
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}
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if (labResultCount != 0) {
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labResultCount->setText(info);
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}
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if (labResultCurrent != 0) {
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labResultCurrent->setText(info);
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}
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if (labResult != 0) {
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labResult->setText(info);
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}
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//开始分页绑定数据前,计算好总数据量以及行数
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tempSql = QString("select count(%1) from %2 %3").arg(countName).arg(tableName).arg(whereSql);
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//采用线程执行查询复合条件的记录行数
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DbCountThread *dbCountThread = new DbCountThread(this);
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//绑定查询结果信号槽,一旦收到结果则立即执行
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connect(dbCountThread, SIGNAL(receiveCount(quint32, double)), this, SIGNAL(receiveCount(quint32, double)));
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connect(dbCountThread, SIGNAL(receiveCount(quint32, double)), this, SLOT(slot_receiveCount(quint32, double)));
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//设置数据库连接名称和查询语句,并启动线程
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dbCountThread->setConnName(connName);
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dbCountThread->setSql(tempSql);
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dbCountThread->start();
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}
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@ -0,0 +1,213 @@
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#ifndef DBPAGE_H
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#define DBPAGE_H
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/**
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* 数据库通用翻页类 作者:feiyangqingyun(QQ:517216493) 2017-1-15
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* 1:自动按照设定的每页多少行数据分页
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* 2:只需要传入表名/字段集合/每页行数/翻页指示按钮/文字指示标签
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* 3:提供公共静态方法绑定字段数据到下拉框
|
||||
* 4:建议条件字段用数字类型的主键,速度极快
|
||||
* 5:增加线程查询符合条件的记录总数,数据量巨大时候不会卡主界面
|
||||
* 6:提供查询结果返回信号,包括当前页/总页数/总记录数/查询用时
|
||||
* 7:可设置所有列或者某一列对齐样式例如居中或者右对齐
|
||||
* 8:可设置增加一列,列的位置,标题,宽度
|
||||
* 9:可设置要查询的字段集合
|
||||
*/
|
||||
|
||||
#include <QtGui>
|
||||
#include <QtSql>
|
||||
#if (QT_VERSION > QT_VERSION_CHECK(5,0,0))
|
||||
#include <QtWidgets>
|
||||
#endif
|
||||
|
||||
//自定义模型设置列居中和右对齐
|
||||
class SqlQueryModel: public QSqlQueryModel
|
||||
{
|
||||
public:
|
||||
explicit SqlQueryModel(QObject *parent = 0);
|
||||
|
||||
protected:
|
||||
QVariant data(const QModelIndex &index, int role) const;
|
||||
|
||||
private:
|
||||
bool allCenter; //所有居中
|
||||
QList<int> alignCenterColumn; //居中对齐列
|
||||
QList<int> alignRightColumn; //右对齐列
|
||||
|
||||
public:
|
||||
//设置所有列居中
|
||||
void setAllCenter(bool allCenter);
|
||||
|
||||
//设置居中对齐列索引集合
|
||||
void setAlignCenterColumn(const QList<int> &alignCenterColumn);
|
||||
|
||||
//设置右对齐列索引集合
|
||||
void setAlignRightColumn(const QList<int> &alignRightColumn);
|
||||
|
||||
};
|
||||
|
||||
//计算复合条件的记录总行数,以便分页
|
||||
class DbCountThread : public QThread
|
||||
{
|
||||
Q_OBJECT
|
||||
public:
|
||||
explicit DbCountThread(QObject *parent = 0);
|
||||
|
||||
private:
|
||||
QString connName; //数据库连接名称
|
||||
QString sql; //要执行的查询语句
|
||||
|
||||
protected:
|
||||
void run();
|
||||
|
||||
signals:
|
||||
void receiveCount(quint32 count, double msec);
|
||||
|
||||
public slots:
|
||||
//设置数据库连接名称
|
||||
void setConnName(const QString &connName);
|
||||
|
||||
//设置要执行的查询语句
|
||||
void setSql(const QString &sql);
|
||||
|
||||
};
|
||||
|
||||
class DbPage : public QObject
|
||||
{
|
||||
Q_OBJECT
|
||||
public:
|
||||
enum DbType {
|
||||
DbType_Sqlite = 0, //sqlite数据库
|
||||
DbType_MySql = 1, //mysql数据库
|
||||
DbType_SqlServer = 3, //sqlserver数据库
|
||||
DbType_Access = 4, //access数据库
|
||||
DbType_PostgreSQL = 5 //postgresql数据库
|
||||
};
|
||||
|
||||
static DbPage *Instance();
|
||||
explicit DbPage(QObject *parent = 0);
|
||||
|
||||
//绑定数据到下拉框
|
||||
static void bindData(const QString &columnName, const QString &orderColumn, const QString &tableName,
|
||||
QComboBox *cbox, const QString &connName = "qt_sql_default_connection");
|
||||
static void bindData(const QString &columnName, const QString &orderColumn, const QString &tableName,
|
||||
QList<QComboBox *> cboxs, const QString &connName = "qt_sql_default_connection");
|
||||
|
||||
private:
|
||||
static QScopedPointer<DbPage> self;
|
||||
|
||||
int startIndex; //分页开始索引,每次翻页都变动
|
||||
QString tempSql; //临时SQL语句
|
||||
QString sql; //sql语句
|
||||
SqlQueryModel *queryModel; //查询模型
|
||||
|
||||
QLabel *labPageCount; //总页数标签
|
||||
QLabel *labPageCurrent; //当前页标签
|
||||
QLabel *labResultCount; //总记录数标签
|
||||
QLabel *labResultCurrent; //每页记录数标签
|
||||
QLabel *labResult; //显示查询用时标签
|
||||
QLabel *labInfo; //总页数当前页总记录数每页记录数
|
||||
|
||||
QTableView *tableView; //显示数据的表格对象
|
||||
QAbstractButton *btnFirst; //第一页按钮对象
|
||||
QAbstractButton *btnPre; //上一页按钮对象
|
||||
QAbstractButton *btnNext; //下一页按钮对象
|
||||
QAbstractButton *btnLast; //末一页按钮对象
|
||||
|
||||
QString countName; //统计表行数用字段
|
||||
QString connName; //所使用的数据库连接名
|
||||
DbType dbType; //数据库类型
|
||||
|
||||
quint32 pageCurrent; //当前第几页
|
||||
quint32 pageCount; //总页数
|
||||
quint32 resultCount; //总记录数
|
||||
quint32 resultCurrent; //每页显示记录数
|
||||
|
||||
QString tableName; //表名
|
||||
QString selectColumn; //要查询的字段集合
|
||||
QString orderSql; //排序语句
|
||||
QString whereSql; //条件语句
|
||||
QList<QString> columnNames; //列名集合
|
||||
QList<int> columnWidths; //列宽集合
|
||||
|
||||
int insertColumnIndex; //插入的列的索引位置
|
||||
QString insertColumnName; //插入的列的标题
|
||||
int insertColumnWidth; //插入的列的宽度
|
||||
|
||||
private slots:
|
||||
void first(); //第一页
|
||||
void previous(); //上一页
|
||||
void next(); //下一页
|
||||
void last(); //末一页
|
||||
|
||||
private slots:
|
||||
//绑定sql语句到表格
|
||||
void bindData(const QString &sql);
|
||||
|
||||
//收到记录行数
|
||||
void slot_receiveCount(quint32 count, double msec);
|
||||
|
||||
signals:
|
||||
void receivePage(quint32 pageCurrent, quint32 pageCount, quint32 resultCount, quint32 resultCurrent);
|
||||
void receiveCount(quint32 count, double msec);
|
||||
|
||||
public slots:
|
||||
//设置需要显示数据的表格,数据翻页对应的按钮
|
||||
void setControl(QTableView *tableView,
|
||||
QLabel *labPageCount, QLabel *labPageCurrent,
|
||||
QLabel *labResultCount, QLabel *labResultCurrent,
|
||||
QLabel *labResult, QLabel *labInfo,
|
||||
QAbstractButton *btnFirst, QAbstractButton *btnPre,
|
||||
QAbstractButton *btnNext, QAbstractButton *btnLast,
|
||||
const QString &countName, const QString &connName = "qt_sql_default_connection");
|
||||
|
||||
//设置数据库连接名称
|
||||
void setConnName(const QString &connName);
|
||||
|
||||
//设置数据库类型
|
||||
void setDbType(const DbType &dbType);
|
||||
|
||||
//设置要查询的表名
|
||||
void setTableName(const QString &tableName);
|
||||
|
||||
//设置要查询的字段列名集合
|
||||
void setSelectColumn(const QString &selectColumn);
|
||||
|
||||
//设置排序sql
|
||||
void setOrderSql(const QString &orderSql);
|
||||
|
||||
//设置条件sql
|
||||
void setWhereSql(const QString &whereSql);
|
||||
|
||||
//设置每页显示多少行数据
|
||||
void setResultCurrent(int resultCurrent);
|
||||
|
||||
//设置列名称集合
|
||||
void setColumnNames(const QList<QString> &columnNames);
|
||||
|
||||
//设置列宽度集合
|
||||
void setColumnWidths(const QList<int> &columnWidths);
|
||||
|
||||
//设置所有列居中
|
||||
void setAllCenter(bool allCenter);
|
||||
|
||||
//设置居中对齐列索引集合
|
||||
void setAlignCenterColumn(const QList<int> &alignCenterColumn);
|
||||
|
||||
//设置右对齐列索引集合
|
||||
void setAlignRightColumn(const QList<int> &alignRightColumn);
|
||||
|
||||
//设置插入的列的索引
|
||||
void setInsertColumnIndex(int insertColumnIndex);
|
||||
|
||||
//设置插入的列的标题
|
||||
void setInsertColumnName(const QString &insertColumnName);
|
||||
|
||||
//设置插入的列的宽度
|
||||
void setInsertColumnWidth(int insertColumnWidth);
|
||||
|
||||
//执行查询
|
||||
void select();
|
||||
};
|
||||
|
||||
#endif // DBPAGE_H
|
||||
|
|
@ -0,0 +1,33 @@
|
|||
#-------------------------------------------------
|
||||
#
|
||||
# Project created by QtCreator 2017-01-15T14:34:50
|
||||
#
|
||||
#-------------------------------------------------
|
||||
|
||||
QT += core gui sql
|
||||
|
||||
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
|
||||
|
||||
TARGET = dbpage
|
||||
TEMPLATE = app
|
||||
MOC_DIR = temp/moc
|
||||
RCC_DIR = temp/rcc
|
||||
UI_DIR = temp/ui
|
||||
OBJECTS_DIR = temp/obj
|
||||
DESTDIR = bin
|
||||
PRECOMPILED_HEADER = head.h
|
||||
|
||||
INCLUDEPATH += $$PWD
|
||||
CONFIG += warn_off
|
||||
|
||||
SOURCES += \
|
||||
main.cpp \
|
||||
dbpage.cpp \
|
||||
frmdbpage.cpp
|
||||
|
||||
HEADERS += \
|
||||
dbpage.h \
|
||||
frmdbpage.h
|
||||
|
||||
FORMS += \
|
||||
frmdbpage.ui
|
||||
|
|
@ -0,0 +1,67 @@
|
|||
#include "frmdbpage.h"
|
||||
#include "ui_frmdbpage.h"
|
||||
#include "dbpage.h"
|
||||
|
||||
frmDbPage::frmDbPage(QWidget *parent) : QWidget(parent), ui(new Ui::frmDbPage)
|
||||
{
|
||||
ui->setupUi(this);
|
||||
this->initForm();
|
||||
}
|
||||
|
||||
frmDbPage::~frmDbPage()
|
||||
{
|
||||
delete ui;
|
||||
}
|
||||
|
||||
void frmDbPage::initForm()
|
||||
{
|
||||
columnNames.clear();
|
||||
columnWidths.clear();
|
||||
|
||||
tableName = "LogInfo";
|
||||
countName = "rowid";
|
||||
|
||||
columnNames.append("防区号");
|
||||
columnNames.append("防区名称");
|
||||
columnNames.append("设备IP");
|
||||
columnNames.append("日志类型");
|
||||
columnNames.append("事件内容");
|
||||
columnNames.append("触发时间");
|
||||
columnNames.append("告警详情");
|
||||
columnNames.append("告警数据");
|
||||
columnNames.append("告警图像");
|
||||
|
||||
columnWidths.append(70);
|
||||
columnWidths.append(120);
|
||||
columnWidths.append(120);
|
||||
columnWidths.append(80);
|
||||
columnWidths.append(150);
|
||||
columnWidths.append(160);
|
||||
columnWidths.append(160);
|
||||
columnWidths.append(160);
|
||||
columnWidths.append(160);
|
||||
|
||||
//设置需要显示数据的表格和翻页的按钮
|
||||
dbPage = new DbPage(this);
|
||||
//设置所有列居中显示
|
||||
dbPage->setAllCenter(true);
|
||||
dbPage->setControl(ui->tableMain, ui->labPageCount, ui->labPageCurrent, ui->labResultCount, ui->labResultCurrent, ui->labResult, 0,
|
||||
ui->btnFirst, ui->btnPre, ui->btnNext, ui->btnLast, countName);
|
||||
ui->tableMain->horizontalHeader()->setStretchLastSection(true);
|
||||
ui->tableMain->verticalHeader()->setDefaultSectionSize(25);
|
||||
}
|
||||
|
||||
void frmDbPage::on_btnSelect_clicked()
|
||||
{
|
||||
ui->labResult->setText("正在查询...");
|
||||
|
||||
//绑定数据到表格
|
||||
QString sql = "where 1=1";
|
||||
dbPage->setTableName(tableName);
|
||||
dbPage->setOrderSql(QString("%1 %2").arg(countName).arg("asc"));
|
||||
dbPage->setWhereSql(sql);
|
||||
dbPage->setResultCurrent(20);
|
||||
dbPage->setColumnNames(columnNames);
|
||||
dbPage->setColumnWidths(columnWidths);
|
||||
dbPage->select();
|
||||
}
|
||||
|
|
@ -0,0 +1,37 @@
|
|||
#ifndef FRMDBPAGE_H
|
||||
#define FRMDBPAGE_H
|
||||
|
||||
#include <QWidget>
|
||||
|
||||
class DbPage;
|
||||
|
||||
namespace Ui {
|
||||
class frmDbPage;
|
||||
}
|
||||
|
||||
class frmDbPage : public QWidget
|
||||
{
|
||||
Q_OBJECT
|
||||
|
||||
public:
|
||||
explicit frmDbPage(QWidget *parent = 0);
|
||||
~frmDbPage();
|
||||
|
||||
private:
|
||||
Ui::frmDbPage *ui;
|
||||
|
||||
QList<QString> columnNames; //字段名集合
|
||||
QList<int> columnWidths; //字段宽度集合
|
||||
DbPage *dbPage; //数据库翻页类
|
||||
|
||||
QString tableName; //表名称
|
||||
QString countName; //统计行数字段名称
|
||||
|
||||
private slots:
|
||||
void initForm();
|
||||
|
||||
private slots:
|
||||
void on_btnSelect_clicked();
|
||||
};
|
||||
|
||||
#endif // FRMDBPAGE_H
|
||||
|
|
@ -0,0 +1,296 @@
|
|||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<ui version="4.0">
|
||||
<class>frmDbPage</class>
|
||||
<widget class="QWidget" name="frmDbPage">
|
||||
<property name="geometry">
|
||||
<rect>
|
||||
<x>0</x>
|
||||
<y>0</y>
|
||||
<width>800</width>
|
||||
<height>600</height>
|
||||
</rect>
|
||||
</property>
|
||||
<property name="windowTitle">
|
||||
<string>Form</string>
|
||||
</property>
|
||||
<layout class="QHBoxLayout" name="horizontalLayout">
|
||||
<property name="leftMargin">
|
||||
<number>6</number>
|
||||
</property>
|
||||
<property name="topMargin">
|
||||
<number>6</number>
|
||||
</property>
|
||||
<property name="rightMargin">
|
||||
<number>6</number>
|
||||
</property>
|
||||
<property name="bottomMargin">
|
||||
<number>6</number>
|
||||
</property>
|
||||
<item>
|
||||
<widget class="QSplitter" name="splitter">
|
||||
<property name="orientation">
|
||||
<enum>Qt::Vertical</enum>
|
||||
</property>
|
||||
<property name="opaqueResize">
|
||||
<bool>false</bool>
|
||||
</property>
|
||||
<widget class="QTableView" name="tableMain">
|
||||
<property name="styleSheet">
|
||||
<string notr="true"/>
|
||||
</property>
|
||||
</widget>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QFrame" name="frameBottom">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>190</width>
|
||||
<height>0</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="maximumSize">
|
||||
<size>
|
||||
<width>190</width>
|
||||
<height>16777215</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="frameShape">
|
||||
<enum>QFrame::Box</enum>
|
||||
</property>
|
||||
<property name="frameShadow">
|
||||
<enum>QFrame::Sunken</enum>
|
||||
</property>
|
||||
<layout class="QVBoxLayout" name="verticalLayout">
|
||||
<property name="leftMargin">
|
||||
<number>6</number>
|
||||
</property>
|
||||
<property name="topMargin">
|
||||
<number>6</number>
|
||||
</property>
|
||||
<property name="rightMargin">
|
||||
<number>6</number>
|
||||
</property>
|
||||
<property name="bottomMargin">
|
||||
<number>6</number>
|
||||
</property>
|
||||
<item>
|
||||
<widget class="QPushButton" name="btnSelect">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>80</width>
|
||||
<height>0</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string>查询</string>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QPushButton" name="btnPre">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>50</width>
|
||||
<height>0</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string>上一页</string>
|
||||
</property>
|
||||
<property name="iconSize">
|
||||
<size>
|
||||
<width>18</width>
|
||||
<height>18</height>
|
||||
</size>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QPushButton" name="btnNext">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>50</width>
|
||||
<height>0</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string>下一页</string>
|
||||
</property>
|
||||
<property name="iconSize">
|
||||
<size>
|
||||
<width>18</width>
|
||||
<height>18</height>
|
||||
</size>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QPushButton" name="btnFirst">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>50</width>
|
||||
<height>0</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string>第一页</string>
|
||||
</property>
|
||||
<property name="iconSize">
|
||||
<size>
|
||||
<width>18</width>
|
||||
<height>18</height>
|
||||
</size>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QPushButton" name="btnLast">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>50</width>
|
||||
<height>0</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string>末一页</string>
|
||||
</property>
|
||||
<property name="iconSize">
|
||||
<size>
|
||||
<width>18</width>
|
||||
<height>18</height>
|
||||
</size>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QLabel" name="labPageCount">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>0</width>
|
||||
<height>25</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="frameShape">
|
||||
<enum>QFrame::Box</enum>
|
||||
</property>
|
||||
<property name="frameShadow">
|
||||
<enum>QFrame::Sunken</enum>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string/>
|
||||
</property>
|
||||
<property name="alignment">
|
||||
<set>Qt::AlignCenter</set>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QLabel" name="labResultCount">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>0</width>
|
||||
<height>25</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="frameShape">
|
||||
<enum>QFrame::Box</enum>
|
||||
</property>
|
||||
<property name="frameShadow">
|
||||
<enum>QFrame::Sunken</enum>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string/>
|
||||
</property>
|
||||
<property name="alignment">
|
||||
<set>Qt::AlignCenter</set>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QLabel" name="labPageCurrent">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>0</width>
|
||||
<height>25</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="frameShape">
|
||||
<enum>QFrame::Box</enum>
|
||||
</property>
|
||||
<property name="frameShadow">
|
||||
<enum>QFrame::Sunken</enum>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string/>
|
||||
</property>
|
||||
<property name="alignment">
|
||||
<set>Qt::AlignCenter</set>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QLabel" name="labResultCurrent">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>0</width>
|
||||
<height>25</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="frameShape">
|
||||
<enum>QFrame::Box</enum>
|
||||
</property>
|
||||
<property name="frameShadow">
|
||||
<enum>QFrame::Sunken</enum>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string/>
|
||||
</property>
|
||||
<property name="alignment">
|
||||
<set>Qt::AlignCenter</set>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<widget class="QLabel" name="labResult">
|
||||
<property name="minimumSize">
|
||||
<size>
|
||||
<width>0</width>
|
||||
<height>25</height>
|
||||
</size>
|
||||
</property>
|
||||
<property name="frameShape">
|
||||
<enum>QFrame::Box</enum>
|
||||
</property>
|
||||
<property name="frameShadow">
|
||||
<enum>QFrame::Sunken</enum>
|
||||
</property>
|
||||
<property name="text">
|
||||
<string/>
|
||||
</property>
|
||||
<property name="alignment">
|
||||
<set>Qt::AlignCenter</set>
|
||||
</property>
|
||||
</widget>
|
||||
</item>
|
||||
<item>
|
||||
<spacer name="verticalSpacer">
|
||||
<property name="orientation">
|
||||
<enum>Qt::Vertical</enum>
|
||||
</property>
|
||||
<property name="sizeHint" stdset="0">
|
||||
<size>
|
||||
<width>20</width>
|
||||
<height>40</height>
|
||||
</size>
|
||||
</property>
|
||||
</spacer>
|
||||
</item>
|
||||
</layout>
|
||||
</widget>
|
||||
</item>
|
||||
</layout>
|
||||
</widget>
|
||||
<resources/>
|
||||
<connections/>
|
||||
</ui>
|
||||
|
|
@ -0,0 +1,8 @@
|
|||
#include <QtCore>
|
||||
#include <QtGui>
|
||||
#include <QtSql>
|
||||
#if (QT_VERSION > QT_VERSION_CHECK(5,0,0))
|
||||
#include <QtWidgets>
|
||||
#endif
|
||||
|
||||
#pragma execution_character_set("utf-8")
|
||||
|
|
@ -0,0 +1,38 @@
|
|||
#include "frmdbpage.h"
|
||||
#include <QtGui>
|
||||
#include <QtSql>
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
QApplication a(argc, argv);
|
||||
a.setFont(QFont("Microsoft Yahei", 9));
|
||||
|
||||
#if (QT_VERSION <= QT_VERSION_CHECK(5,0,0))
|
||||
#if _MSC_VER
|
||||
QTextCodec *codec = QTextCodec::codecForName("gbk");
|
||||
#else
|
||||
QTextCodec *codec = QTextCodec::codecForName("utf-8");
|
||||
#endif
|
||||
QTextCodec::setCodecForLocale(codec);
|
||||
QTextCodec::setCodecForCStrings(codec);
|
||||
QTextCodec::setCodecForTr(codec);
|
||||
#else
|
||||
QTextCodec *codec = QTextCodec::codecForName("utf-8");
|
||||
QTextCodec::setCodecForLocale(codec);
|
||||
#endif
|
||||
|
||||
//打开数据库,整个应用程序可用
|
||||
QSqlDatabase dbConn = QSqlDatabase::addDatabase("QSQLITE");
|
||||
dbConn.setDatabaseName(qApp->applicationDirPath() + "/TA.db");
|
||||
if (dbConn.open()) {
|
||||
qDebug() << "连接数据库成功!";
|
||||
} else {
|
||||
qDebug() << "连接数据库失败!";
|
||||
}
|
||||
|
||||
frmDbPage w;
|
||||
w.setWindowTitle("数据库分页示例(作者:517216493)");
|
||||
w.show();
|
||||
|
||||
return a.exec();
|
||||
}
|
||||
|
|
@ -0,0 +1 @@
|
|||
记得将源码下的TA.db复制到可执行文件同一目录
|
||||
Binary file not shown.
|
After Width: | Height: | Size: 99 KiB |
Loading…
Reference in New Issue