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本地数据库操作.html
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本地数据库操作.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
</body>
<head>
<script src="Scripts/jquery-1.5.1.js" type="text/javascript"></script>
<script type="text/javascript">
function initDatabase() {
var db = getCurrentDb();//初始化数据库
if(!db) {alert("您的浏览器不支持HTML5本地数据库");return;}
db.transaction(function (trans) {//启动一个事务，并设置回调函数
//执行创建表的Sql脚本
trans.executeSql("create table if not exists Demo(uName text null,title text null,words text null)", [], function (trans, result) {
}, function (trans, message) {//消息的回调函数alert(message);});
}, function (trans, result) {
}, function (trans, message) {
});
}
$(function () {//页面加载完成后绑定页面按钮的点击事件
initDatabase();
$("#btnSave").click(function () {
var txtName = $("#txtName").val();
var txtTitle = $("#txtTitle").val();
var txtWords = $("#txtWords").val();
var db = getCurrentDb();
//执行sql脚本，插入数据
db.transaction(function (trans) {
trans.executeSql("insert into Demo(uName,title,words) values(?,?,?) ", [txtName, txtTitle, txtWords], function (ts, data) {
}, function (ts, message) {
alert(message);
});
});
showAllTheData();
});
});
function getCurrentDb() {
//打开数据库，或者直接连接数据库参数：数据库名称，版本，概述，大小
//如果数据库不存在那么创建之
var db = openDatabase("myDb", "1.0", "it's to save demo data!", 1024 * 1024); ;
return db;
}
//显示所有数据库中的数据到页面上去
function showAllTheData() {
$("#tblData").empty();
var db = getCurrentDb();
db.transaction(function (trans) {
trans.executeSql("select * from Demo ", [], function (ts, data) {
if (data) {
for (var i = 0; i < data.rows.length; i++) {
appendDataToTable(data.rows.item(i));//获取某行数据的json对象
}
}
}, function (ts, message) {alert(message);var tst = message;});
});
}
function appendDataToTable(data) {//将数据展示到表格里面
//uName,title,words
var txtName = data.uName;
var txtTitle = data.title;
var words = data.words;
var strHtml = "";
strHtml += "<tr>";
strHtml += "<td>"+txtName+"</td>";
strHtml += "<td>" + txtTitle + "</td>";
strHtml += "<td>" + words + "</td>";
strHtml += "</tr>";
$("#tblData").append(strHtml);
}
</script>
</head>
<body>
<table>
<tr>
<td>用户名：</td>
<td><input type="text" name="txtName" id="txtName" required/></td>
</tr>
<tr>
<td>标题：</td>
<td><input type="text" name="txtTitle" id="txtTitle" required/></td>
</tr>
<tr>
<td>留言：</td>
<td><input type="text" name="txtWords" id="txtWords" required/></td>
</tr>
</table>
<input type="button" value="保存" id="btnSave"/>
<hr/>
<input type="button" value="展示所哟数据" onclick="showAllTheData();"/>
<table id="tblData">
</table>
</body>
</html>