【簡單的留言本】用HTML新增的數據庫實現
使用數據庫實現的WEB留言本
var datatable = null;
var db = openDatabase('Mydata','','My Database',102400);
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 = "時間";
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) {
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("成功保存數據！");
},function (tx,rs) {
alert(error.source+"::" + error.message);
});
});
}
function saveData() {
var name = document.getElementById('name').value;
var memo = document.getElementById('memo').value;
var time = new Date().getTime();
//alert(time);
addData(name,memo,time);
showAllData();
}
使用數據庫實現的Web留言本
姓名：
留言：
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