简单的前端js+ajax 购物车框架(入门篇)_javascript技巧

今天在公司实在没有事做，突然就想到写下商城的购物车的前端框架，当然我这里只有购物车的增删改查，也许写的并不是那么完善，但最重要的是一个入门，也希望js达人给些建议，好让我更上一个台阶。
HOHO~~~开始咯：
Js：

//为了省事，就没写自己的js ajax了 用了jquery的，当然你也可以添加到jquery的扩展方法内,哈哈，我太懒了，所以就写这里了。
var _$ = { AJAX: function (urlparm, d, beforecall, successcall) {
$.ajax({
url: "ashx/ajax_shoppingCart.ashx?" + urlparm,
data:d,
dataType:"Json",
type: "POST",
before: beforecall,
success:successcall
});
}
};
(function () {
var Jusoc = {};
Jusoc = {
_inital: function () { window.Jusoc = Jusoc; },
Base: {},
DAO: {},
BLL: {},
UI: {}
}
Jusoc.Base = {
Validate: {
}
}
//AJAX()
Jusoc.DAO = {
Shopping: {
Get: function (beforecall, successcall) {
_$.AJAX("action=get", null, beforecall, successcall);
},
Remove: function (pid, beforecall, successcall) {
_$.AJAX("action=remove", { "pid": pid }, beforecall, successcall);
},
Add: function (pid, pcount, beforecall, successcall) {
_$.AJAX("action=add", { "pid": pid, "pcount": pcount }, beforecall, successcall);
},
Set: function (pid, pcount, beforecall, successcall) {
_$.AJAX("action=set", { "pid": pid, "pcount": pcount }, beforecall, successcall);
}
}
}
Jusoc.BLL = {
Shopping: (function () {
var Data = null;
var isLock = false;
var _successcall = null;
var _beforecall = null;
function Unlock() {
isLock = false;
}
function Lock() {
isLock = true;
if(Data&&Data !=null)
{
Data = null;
}
}
function CallBackFunction(xhr) {
Unlock();
// if (xhr[0] == "ERROR") {
// alert(xhr[1]);
// return;
// }
// else if (xhr[0] == "SUCCESS") {
// Jusoc.BLL.Shopping.SetData(xhr[1]);
// }
Jusoc.BLL.Shopping.SetData(xhr);
if (_successcall != null && _successcall) {
_successcall.call(window, xhr);
}
_successcall = null;
}
function PrepareRequst(beforecall, successcall) {
if (isLock) {
return false;
}
Lock();
if (beforecall != null && beforecall) {
_beforecall = beforecall;
}
if (successcall != null && successcall) {
_successcall = successcall;
}
}
return {
Get: function (beforecall, successcall) {
if(PrepareRequst(beforecall, successcall)==false)return false;
Jusoc.DAO.Shopping.Get(_beforecall, CallBackFunction);
},
Remove: function (pid, beforecall, successcall) {
if(PrepareRequst(beforecall, successcall)==false)return false;
Jusoc.DAO.Shopping.Remove(pid, _beforecall, CallBackFunction);
},
Set: function (pid, pcount, beforecall, successcall) {
if(PrepareRequst(beforecall, successcall)==false)return false;
Jusoc.DAO.Shopping.Set(pid, pcount, beforecall, CallBackFunction);
},
Add: function (pid, pcount, beforecall, successcall) {
if(PrepareRequst(beforecall, successcall)==false)return false;
Jusoc.DAO.Shopping.Add(pid, pcount, _beforecall, CallBackFunction);
},
GetData: function () {
//alert(Data);
return Data;
},
SetData: function (data) { Data = data; },
RemoveData: function () {
if (Data != null && Data)
Data= null;
}
}
})(),
XHR: {
}
}
Jusoc.UI = {
ShoppingCart: (function () {
function Constract() {
Jusoc.BLL.Shopping.Get(null,SetShoppingCart);
}
function SetShoppingCart(data) {
//这里来填充购物车中的数据
var data = Jusoc.BLL.Shopping.GetData();
//这里 先构建 整个的购物车
var html = ""+
""+
""+
""+
""+
""+
""+
"";
for(var i =0;i{
html += ""+
""+
""+
""+
""+
""+
"";
}
html+="

"+ "书啊"+ "	"+ "书名"+ "	"+ " 单价"+ "	"+ " 数量"+ "	"+ " 操作"+ "
"+ ""+ "	"+ data[i].Name+ "	"+ "￥"+data[i].Money+ "	"+ " "+ ""+ " "title=\"数量减一\" class=\"cut\" onclick=\"Jusoc.UI.ShoppingCart.Minus(1,this.parentNode.childNodes[0].value,this.parentNode.childNodes[0])\">"+ " "+ "	"+ "Remove From Cark"+ "

";
document.body.innerHTML+=html;
}
function AddToPanel(data) {
//这里是对 添加一个商品到购物车 来修改前台样式
var obj = document.getElementById("sm");
var html = ""+
""+
""+
""+
data.Name+
""+
""+
"￥"+data.Money+
""+
""+
"

"+
""+
" "title=\"数量减一\" class=\"cut\" onclick=\"Jusoc.UI.ShoppingCart.Minus(1,this.parentNode.childNodes[0].value,this.parentNode.childNodes[0])\">"+
"

"+
""+
""+
"Remove From Cark"+
"";
var row = obj.insertRow(1);
row.innerHTML = html;
return;
obj.childNodes[0].innerHTML += html;
}
function UpdatePanel(obj, count) {
//这里是从购物车中 增加 或者 减少 修改操作
obj.value = count;
}
function RemoveFromPanel(child)
{
var obj = document.getElementById("sm");
obj.childNodes[0].removeChild(child);
}
return {
PageLoad: function () {
Constract();
},
Add: function (pid, pcount) {
Jusoc.BLL.Shopping.Add(pid,pcount, null, AddToPanel);
},
Plus: function (pid, pcount, obj) {
pcount = parseInt(pcount) + 1;
Jusoc.BLL.Shopping.Set(pid, pcount, function () { alert("before") }, function (data) { UpdatePanel(obj, pcount) });
},
Minus:function(pid,pcount,obj){
pcount = parseInt(pcount) - 1;
Jusoc.BLL.Shopping.Set(pid,pcount,null,function(data){ UpdatePanel(obj,pcount)});
},
Remove:function(pid,obj){
Jusoc.BLL.Shopping.Remove(pid,null,function(data){ RemoveFromPanel(obj);});
}
}
})()
}
Jusoc._inital();
})()

　　Tips:这里的显示页面仅仅是demo，如需要，可以自己定制。
　　HTML：

购物车
总金额：￥

修改成功！

您的商品总金额为￥@Model.Total.ToString("0.00")元

关闭

Add one to Shopping Cart

ashx：这个我就不就木有必要黏贴出来了，根据自己的业务去写额。

总结：OK,搞定！！