init commit

2024-08-29 17:45:03 +08:00
commit 920f74607b
123 changed files with 6426 additions and 0 deletions
--- a/lib/TryPage.dart
+++ b/lib/TryPage.dart
@@ -0,0 +1,148 @@
+import 'package:flutter/material.dart';
+import 'package:mysql_client/mysql_client.dart';
+import 'package:http/http.dart' as http;
+import 'package:topic/HomePage.dart';
+void main() {
+  runApp(TryPage());
+}
+
+class TryPage extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        appBar: AppBar(
+          title: Text('MySQL Data'),
+        ),
+        body: MySqlData(),
+      ),
+    );
+  }
+}
+class MySqlData extends StatefulWidget {
+  @override
+  _MySqlDataState createState() => _MySqlDataState();
+}
+
+class _MySqlDataState extends State<MySqlData> {
+  List<Map<String, dynamic>> _results = [];
+
+  @override
+  void initState() {//初始化
+    super.initState();
+    _fetchData();//連資料庫
+  }
+
+  void  _fetchData() async {
+    print('connect');
+
+    final conn = await MySQLConnection.createConnection(
+      host: '203.64.84.154',
+      port: 33061,
+      userName: 'root',
+      password: 'Topic@2024',
+      databaseName: 'care',
+    );
+    await conn.connect();
+
+    try {
+      var result = await conn.execute('SELECT eName, eGender FROM Elder');
+      print('Result: ${result.length} rows found.');
+
+      if (result.rows.isEmpty) {//null
+        print('No data found in users table.');
+      }
+      else {
+        setState(() {
+          _results = result.rows.map((row) =>
+              {
+                'name': row.colAt(0),
+                'gender': row.colAt(1)
+              } //colat的參數是看select進來的參數
+          ).toList();
+        });
+      }
+    }
+    catch (e) {
+      print('Error: $e');
+    }
+    finally{
+      await conn.close();
+    }
+  }
+
+  //頁面
+  @override
+  Widget build(BuildContext context) {
+    return ListView.builder(
+      itemCount: _results.length,
+      itemBuilder: (context, index) {
+        final user = _results[index];
+        return ListTile(
+          title: Text(user['name']),
+          subtitle: Text('gender: ${user['gender']}'),
+        );
+      },
+    );
+  }
+}
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+//server=203.64.84.154;database=care;uid=root;password=Topic@2024;port = 33061";
+/*
+  // 创建数据库连接对象
+  final conn = await Connection.connect(settings);
+
+  // 执行SQL查询语句
+  final result = await conn.query('SELECT * FROM users');
+
+  // 处理查询结果
+  for (final row in result) {
+    print('${row[0]} - ${row[1]} - ${row[2]}');
+  }
+
+  // 执行SQL插入语句
+  final insertResult = await conn.execute('INSERT INTO users (name, age) VALUES (?, ?)', ['John', 30]);
+
+  // 处理插入结果
+  print('Inserted rows: ${insertResult.affectedRows}');
+
+  // 执行SQL更新语句
+  final updateResult = await conn.execute('UPDATE users SET age = ? WHERE name = ?', [35, 'John']);
+
+  // 处理更新结果
+  print('Updated rows: ${updateResult.affectedRows}');
+
+  // 执行SQL删除语句
+  final deleteResult = await conn.execute('DELETE FROM users WHERE name = ?', ['John']);
+
+  // 处理删除结果
+  print('Deleted rows: ${deleteResult.affectedRows}');
+
+  // 关闭数据库连接
+  conn.close();
+}*/