web sql
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>本地数据库SQLlite</title>
</head>
<body onload="init()">
<table>
<tr><td>姓名：</td><td><input type="text" id="name" /></td></tr>
<tr><td>留言：</td><td><input type="text" id="memo" /></td></tr>
<tr><td></td><td><input type="button" value="保存" onclick="saveData()" /></td></tr>
</table>
<table id="datatable" border="1"></table>
<p id="msg"></p>
<!--
1.创建访问数据库的对象
2.使用事务处理
-->
<script type="text/javascript">
var datatable=null;
var db=openDatabase("mydb","1.0","test db",1024*100);
function init(){
datatable=document.getElementById("datatable");
showAllData();
}
function removeAllData(){
for(var i=datatable.childNodes.length-1;i>=0;i--){
datatable.removeChild(datatable.childNodes[i]);
}
var tr=document.createElement("tr");
var th1=document.createElement("th");
var th2=document.createElement("th");
var th3=document.createElement("th");
th1.innerHTML="姓名";
th2.innerHTML="留言";
th3.innerHTML="时间";
tr.appendChild(th1);
tr.appendChild(th2);
tr.appendChild(th3);
datatable.appendChild(tr);
}
function showData(row){ //加数据
var tr=document.createElement("tr");
var td1=document.createElement("td");
td1.innerHTML=row.name;
var td2=document.createElement("td");
td2.innerHTML=row.message;
var td3=document.createElement("td");
var t=new Date();
t.setTime(row.time);
td3.innerHTML=t.toLocaleDateString()+""+t.toLocaleTimeString();
tr.appendChild(td1);
tr.appendChild(td2);
tr.appendChild(td3);
datatable.appendChild(tr);
}
function showAllData(){
db.transaction(function(tx){
tx.executeSql("create table if not exists msgData(name TEXT,message TEXT,time INTEGER)",[]);
tx.executeSql("select * from msgData",[],function(tx,rs){
removeAllData();
for(var i=0;i<rs.rows.length;i++){
showData(rs.rows.item(i));
}
})
})
}
function addData(name,message,time){
db.transaction(function(tx){
tx.executeSql("insert into msgData values(?,?,?)",[name,message,time],function(tx,rs){ alert("ok"); },function(tx,error){
alert(error.source+"::"+error.message);
})
})
}
function saveData(){ //点击保存
var name=document.getElementById("name").value;
var memo=document.getElementById("memo").value;
var time=new Date().getTime();
addData(name,memo,time);
showAllData();
}
</script>
</body>
</html>
