phonegap操作数据库详解

互联网 18-3-26

这次给大家带来phonegap操作数据库详解，phonegap操作数据库的注意事项有哪些，下面就是实战案例，一起来看一下。

实例如下：

<!DOCTYPE html>   <html>           <head>           <meta charset="UTF-8">           <title>Database Example</title>               <script type="text/javascript" charset="UTF-8" src="cordova.js"></script>           <script type="text/javascript" charset="UTF-8">               document.addEventListener("deviceready", onDeviceReady, false);                   function onDeviceReady() {                   var db=window.openDatabase("Test","1.0","Test",200000);                   db.transaction(populateDB,errorDB,successDB);               }                               //初始化数据库数据               function populateDB(tx){                   tx.executeSql('DROP TABLE IF EXISTS test1');                   tx.executeSql('CREATE TABLE IF NOT EXISTS test1 (id unique,name)');                   tx.executeSql('INSERT INTO test1(id,name) VALUES(1,"Tony")');                   tx.executeSql('INSERT INTO test1(id,name) VALUES(2,"Bill")');                   tx.executeSql('INSERT INTO test1(id,name) VALUES(3,"Tony")');               }                               //查询方法               function queryDB(tx){                   tx.executeSql('SELECT * FROM test1',[],querySuccess,errorDB);               }                               //查询成功回调               function querySuccess(tx,results){                   var len=results.rows.length;                   var status=document.getElementById("status");                   var string ="Rows:"+len+"<br />";                   for(var i=0;i<len;i++){                       string+=results.rows.item(i).name+"<br />";                   }                   status.innerHTML=string;               }                               //执行初始化数据成功后的回调               function successDB(){                   var db=window.openDatabase("Test","1.0","Test",200000);                   db.transaction(queryDB,errorDB);               }                               //失败回调               function errorDB(err){                   alert('Error processing SQL:'+err.code);               }                           </script>       </head>           <body>           <h1>Names</h1>           <p id='status'></p>       </body>       </html>

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phonegap操作数据库详解

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