{"id":97170,"date":"2024-10-20T15:35:18","date_gmt":"2024-10-20T07:35:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/97170\/"},"modified":"2024-10-20T15:35:19","modified_gmt":"2024-10-20T07:35:19","slug":"qt%e8%87%aa%e5%b8%b6%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e8%a1%a8%e6%a1%88%e4%be%8b-qt%e8%87%aa%e5%b8%b6%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e6%89%be%e8%a1%a8%e5%af%a6%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/97170\/","title":{"rendered":"Qt\u81ea\u5e36\u6578\u64da\u5eab\u67e5\u8a62\u8868\u6848\u4f8b (qt\u81ea\u5e36\u6578\u64da\u5eab\u67e5\u627e\u8868\u5be6\u4f8b)"},"content":{"rendered":"

Qt\u81ea\u5e36\u6578\u64da\u5eab\u67e5\u8a62\u8868\u6848\u4f8b<\/h1>\n

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Qt\u7684\u6578\u64da\u5eab\u652f\u6301<\/h2>\n

Qt\u652f\u6301\u591a\u7a2e\u6578\u64da\u5eab\uff0c\u5305\u62ecSQLite\u3001MySQL\u3001PostgreSQL\u7b49\u3002\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528Qt\u7684SQL\u6a21\u584a\u4f86\u57f7\u884c\u67e5\u8a62\u3001\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\u3002Qt\u7684\u6578\u64da\u5eab\u529f\u80fd\u4e3b\u8981\u901a\u904eQSqlDatabase\u3001QSqlQuery\u548cQSqlTableModel\u7b49\u985e\u4f86\u5be6\u73fe\u3002<\/p>\n

\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n

\u5728\u4f7f\u7528Qt\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528SQLite\u6578\u64da\u5eab\u7684\u793a\u4f8b\u4ee3\u78bc\uff1a<\/p>\n

\n#include <QSqlDatabase>\n#include <QSqlError>\n#include <QSqlQuery>\n#include <QDebug>\n\nvoid createConnection() {\n    QSqlDatabase db = QSqlDatabase::addDatabase(\"QSQLITE\");\n    db.setDatabaseName(\"example.db\");\n\n    if (!db.open()) {\n        qDebug() << \"\u7121\u6cd5\u9023\u63a5\u5230\u6578\u64da\u5eab\uff1a\" << db.lastError().text();\n    } else {\n        qDebug() << \"\u6210\u529f\u9023\u63a5\u5230\u6578\u64da\u5eab\uff01\";\n    }\n}\n<\/code><\/pre>\n
\u5275\u5efa\u6578\u64da\u8868<\/h2>\n
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\nvoid createTable() {\n    QSqlQuery query;\n    query.exec(\"CREATE TABLE users (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER)\");\n}\n<\/code><\/pre>\n
\u63d2\u5165\u6578\u64da<\/h2>\n
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\nvoid insertData() {\n    QSqlQuery query;\n    query.prepare(\"INSERT INTO users (name, age) VALUES (?, ?)\");\n    query.addBindValue(\"Alice\");\n    query.addBindValue(30);\n    query.exec();\n}\n<\/code><\/pre>\n
\u67e5\u8a62\u6578\u64da<\/h2>\n
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\nvoid queryData() {\n    QSqlQuery query(\"SELECT * FROM users\");\n    while (query.next()) {\n        int id = query.value(0).toInt();\n        QString name = query.value(1).toString();\n        int age = query.value(2).toInt();\n        qDebug() << \"ID:\" << id << \"Name:\" << name << \"Age:\" << age;\n    }\n}\n<\/code><\/pre>\n
\u4f7f\u7528QSqlTableModel\u986f\u793a\u6578\u64da<\/h2>\n
\u9664\u4e86\u4f7f\u7528QSqlQuery\u9032\u884c\u67e5\u8a62\u5916\uff0cQt\u9084\u63d0\u4f9b\u4e86QSqlTableModel\u985e\u4f86\u65b9\u4fbf\u5730\u986f\u793a\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528QSqlTableModel\u4f86\u986f\u793a\u201cusers\u201d\u8868\u7684\u6578\u64da\uff1a<\/p>\n
\n#include <QSqlTableModel>\n\nvoid displayData(QTableView *view) {\n    QSqlTableModel *model = new QSqlTableModel;\n    model->setTable(\"users\");\n    model->select();\n    view->setModel(model);\n}\n<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
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