html5中sql 使用
董嘉祯
html5中sql 使用
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<script src="sql.js"></script>
</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>
<hr/>
<table id="datatable" border="1">
</table>
<p id="msg"></p>
</body>
</html>js
/**
* Created by 宋贤 on 2015/10/15.
*/
var datatable=null;
var db=openDatabase("MyData","","My Database",1024*100);
function init(){
datatable=document.getElementById("datatable");
showAllData();
}
function removeAll(){
for(var i=datatable.hasChildNodes.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){
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){
removeAll();
console.log("ss");
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("成功");
},function(tx,error){
alert(error.source+"::"+error.message);
});
});
}
function saveData(){
var name=document.getElementById("name").value;
var memo=document.getElementById("memo").value;
var time=new Date().getTime();
addData(name,memo,time);
showAllData();
}
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