Webform——购物车

   

     购物车主要实现的功能:

    ①在主页面可以将所有商品显示出来,包括价格,库存。

    ②点击购买可以累加产品,如果是同一种产品,只会累加每种产品的数量。

    ③查看购物车,可以查看明细,包括所购物品的名称,价格,数量等等。由于这里的OrderDetails表没有水果名称和价格,所以需要扩展(Paitial)OrderDetails属性。

    ④在购物车中可以下订单,当点击下订单的时候,需要判断是否已经登录,如果没有登录,则跳到登录页面。

    ⑤下订单之后,客户的余额减少幅度等于所消费幅度。

  ⑥余额不足,提示。

    ⑦库存不足,提示。

    ⑧购物车清空。

    ⑨库存产品数量减少,减少的每种产品的数量等于购买的每种产品的数量。

Webform——购物车_第1张图片

 

 

下面用代码来详细介绍一下购物车功能的实现:

Webform——购物车_第2张图片  

①Index页面,实现功能①,显示所有物品。

aspx.cs:

public partial class Page_Index : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
      
        List<Fruit> list = new FruitBF().Select();
        Repeater1.DataSource = list;
        Repeater1.DataBind();
      

        int Count;
        decimal cost;          
        if (Session["cart"] == null) //如果购物车里面为空
        {
            Count = 0; //购买的数量便为0
            cost=0;
        }
        else //如果不为空
        {
            //用Session来存放数量
            List<OrderDetails> temp = Session["cart"] as List<OrderDetails>;//看看Session里面有多少个数据
           Count = temp.Count;//购买的数量便是Session里面的数据    
           cost = temp.Sum(P => P.Count * P.FruitPrice1).Value;
        }
   
        Literal1.Text = "购物车中有" + Count + "种商品,总共花费"+cost+"";
        //Session["count"] = Count;
        

    }
}

aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Index.aspx.cs" Inherits="Page_Index" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
    <style>
        .index
         {
            background-color:#6d9aea;
            width:100%;
            height:1000px;
        }
        .change {
            position:absolute;
            top:222px;
            left:400px;
            height:400px;
            width:500px;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div class="index" >
        <br/>
        <h1>&nbsp;&nbsp;&nbsp;&nbsp; XXX购物网</h1>
        <p>&nbsp;</p>
        <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </p>
        <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            &nbsp;&nbsp;&nbsp;&nbsp;<a href="Login.aspx"> 登陆</a> </p>
           <div class="change" >
               <asp:Literal ID="Literal1" runat="server"></asp:Literal>
              <asp:Repeater ID="Repeater1" runat="server"> <HeaderTemplate><table border="1" width="600px" cellpadding="2" cellspacing="1" bgcolor="#fff"><tr><td>代号</td><td>水果名称</td><td>水果价格</td><td>原产地</td><td>货架</td><td>库存量</td><td>操作</td></tr></HeaderTemplate> <ItemTemplate> <tr> <td><%#Eval("Ids") %></td> <td><%#Eval("Name") %></td> <td><%#Eval("Price") %></td> <td><%#Eval("Source") %></td> <td><%#Eval("Stack") %></td> <td><%#Eval("Numbers") %></td> <td><a href="Buy.aspx?id=<%#Eval("Ids") %>">购买</a></td> </tr> </ItemTemplate> <FooterTemplate></table></FooterTemplate> </asp:Repeater>
               </div>
           <p> &nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;&nbsp;&nbsp; &nbsp; </p>
        <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href="Index.aspx">浏览商品&nbsp;&nbsp;</a> </p>
        <p style="margin-left: 120px">&nbsp; <a href="ViewAccount.aspx">查看账户</a></p>
        <p style="margin-left: 120px">&nbsp; <a href="ViewCart.aspx">查看购物车</a></p>
     
    
    </div>
    </form>
</body>
</html>

效果图:

Webform——购物车_第3张图片

 

②实现功能②③,查看购物车代码

购买:

aspx.cs

public partial class Page_Buy : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {       
            string id= Request["id"].ToString();
            if (Session["cart"] == null) //如果购物车是空的
            {
                //造一个新的Datails集合来存放数量
                List<OrderDetails> temp = new List<OrderDetails>();
                Session["cart"] = temp; //给Session赋值,这时候是空的
            }
            //不是空的话,就直接利用Session里的数据
            List<OrderDetails> list = Session["cart"] as List<OrderDetails>; //操作Session就是操作订单集合 //点击一下购买,那么Session便存了一个信息,然后放到了订单集合里面

            //下面开始根据传进来的物品的Id来判断是否已经购买过
            var query = list.Where(P => P.FruitCode == id);
            if (query.Count() <= 0) //这证明以前没有买过
            {
                //既然没买过,就要造一个新的存进Session里面去
                OrderDetails data = new OrderDetails();
                data.FruitCode = id;//购买的物品的ID就是传过来的Id
                data.Count = 1;//购买的数量等于1
                list.Add(data);//将购买的加进订单的集合里面 也就是Session里面
            }
            else//如果之前买过,只需要再数量上++就可以了
            {
                OrderDetails data = query.First();//这是根据传进来的Id查到的所购买的物品
                data.Count++; //数量++
            }
            Response.Redirect("Index.aspx");

    }
}

 

查看购物车:

aspx.cs:

public partial class Page_ViewCart : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {   
        decimal cost;
    
        if (Session["cart"] == null) //如果是空的,就给Session赋一个空的订单
        {
            List<OrderDetails> temp = new List<OrderDetails>(); //造一个新的订单集合
            Session["cart"] = temp;//给Session赋值 空的订单
            cost = 0;
        }
        
        //如果购物车不是空的,那么订单就是Session
        List<OrderDetails> list = Session["cart"] as List<OrderDetails>; //点击一下购买,那么Session便存了一个信息,然后放到了订单集合里面
        cost = list.Sum(P=>P.FruitPrice1*P.Count).Value;   
        Session["cost"] = cost;
        Repeater1.DataSource = list;
        Repeater1.DataBind();
        Literal1.Text = "总共消费"+cost+"";
        if (list.Count>0)
     {
        Session["bianhao"] = list[0].FruitCode;
        Session["shuliang"] = list[0].Count;
     }
     
     
    }
}
  protected void Button1_Click(object sender, EventArgs e) //提交订单
    {
        List<OrderDetails> list = Session["linshi"] as List<OrderDetails>;
         for (int i = 0; i < list.Count; i++)  //扣除库存          {
             string x = list[i].FruitCode;
             int y = Convert.ToInt32(list[i].Count);
             int count= new FruitBF().SelectByCode(x);
             if(y>count)
             {
                 Response.Redirect("kucunbuzu.aspx");
             }
             else
             {
                 new FruitBF().Update(x, y);
                
             }

         
         } 
        Response.Redirect("ViewAccount.aspx");
    }
 
 

 

 

aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ViewCart.aspx.cs" Inherits="Page_ViewCart" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
     <style>
        .index
         {
            background-color:#6d9aea;
            width:100%;
            height:1000px;
        }
        .change {
            position:absolute;
            top:222px;
            left:400px;
            height:234px;
            width:500px;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
   <div class="index" >
        <br/>
        <h1>&nbsp;&nbsp;&nbsp;&nbsp; 查看购物车</h1>
        <p>&nbsp;</p>
        <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </p>
        <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</p>
           <div class="change" >
               <h2>购物车中有以下产品,
                   <asp:Literal ID="Literal1" runat="server"></asp:Literal>
               </h2>
               <asp:Repeater ID="Repeater1" runat="server">
                   <HeaderTemplate>
                       <table>
                    <tr>
                      <td>商品名称</td>
                       <td>商品单价</td>
                       <td>购买数量</td>
                       <td>操作</td>
                      </tr></HeaderTemplate>
             <ItemTemplate>
                 <tr>
                 <td><%#Eval("FruitName1") %></td>
                  <td><%#Eval("FruitPrice1") %></td>
                  <td><%#Eval("Count") %></td>
                 <td><a href="Delete.aspx?id=<%#Eval("FruitCode") %>">删除</a></td>
                     </tr>

             </ItemTemplate>
                <FooterTemplate></table></FooterTemplate>

               </asp:Repeater>
                 
               </div>
          <p>  &nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;&nbsp;&nbsp; &nbsp; </p>
        <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href="Index.aspx">浏览商品</a>&nbsp;&nbsp; </p>
        <p style="margin-left: 120px">&nbsp; <a href="ViewAccount.aspx">查看账户</a></p>
        <p style="margin-left: 120px">&nbsp; <a href="ViewCart.aspx">查看购物车</a></p>
        <p style="margin-left: 120px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </p>
        <p style="margin-left: 120px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </p>
        <p style="margin-left: 120px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href="ViewAccount.aspx">提交订单</a>&nbsp;</p>
        <p style="margin-left: 120px">&nbsp;</p>
        <p style="margin-left: 120px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;</p>
     
    
    </div>
    </form>
</body>
</html>

删除:

aspx.cs:

 

public partial class Page_Delete : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if(Session["cart"]==null) //如果购物车是空的
        {
            List<OrderDetails> temp = new List<OrderDetails>(); //造一个空的订单
            Session["cart"] = temp;  //给Session赋值
        }
        //无论是不是空的,都要执行下面的
        List<OrderDetails> list = Session["cart"] as List<OrderDetails>; //订单就是Session
        string id = Request["id"].ToString();

        //开始执行删除
        var query = list.Where(P=>P.FruitCode==id);
        if (query.Count() > 0) 
        {
            OrderDetails data = query.First();
          if(data.Count>1) //证明以前买过,数量减减就行了
          {
              data.Count--;
          }
          else
          {
              list.Remove(data);
          }
        }
        Response.Redirect("ViewCart.aspx");
     
    }
}

 

 

效果图:

Webform——购物车_第4张图片

 

 

③实现下订单转登陆

登陆

aspx.cs:

public partial class Page_Login : System.Web.UI.Page
{
   
    protected void Button1_Click(object sender, EventArgs e)
    {
        string username = TextBox1.Text;
        string password = TextBox2.Text;
   
     
        if (string.IsNullOrWhiteSpace(username) )
        {
            Response.Write("<script>alert('用户名不能为空')</script>");

        }
        else if(string.IsNullOrWhiteSpace(password))
        {
            Response.Write("<script>alert('密码不能为空')</script>");
        }
        else
        {
         
            bool isok = new LoginBF().CheckUser(username, password);
            if (isok)
            {   
                Login data = new LoginBF().Check(username, password);
                Session["user"] = data;

                Response.Redirect("ViewAccount.aspx");
            }
            else
            {
                Response.Write("<script>alert('用户名不存在或密码不正确,请核对!!!')</script>");
            }
        }
           
    }
}

aspx.cs:

 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Page_Login" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
     <style>
        .index
         {
            background-color:#6d9aea;
            width:100%;
            height:1000px;
        }
        .change {
            position:absolute;
            top:222px;
            left:400px;
            height:400px;
            width:500px;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div class="index">
        <h1>登陆页面</h1>
    <div class="change">
        用户名:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br/>
        密码:&nbsp; <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
        <br />
        <br/>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <asp:Button ID="Button1" runat="server" Text="登陆" OnClick="Button1_Click" />&nbsp; 
        <input id="Button2" type="button" value="注册"  onclick="LoginUser()"/></div> 
        <p>&nbsp;&nbsp;&nbsp; &nbsp; </p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href="Index.aspx">浏览商品&nbsp;&nbsp;</a> </p>
        <p style="margin-left: 120px">&nbsp; <a href="ViewAccount.aspx">查看账户</a></p>
        <p style="margin-left: 120px">&nbsp; <a href="ViewCart.aspx">查看购物车</a></p>
    </div>
        
    </form>
</body>
</html>
<script>
    function LoginUser()
    {
        window.location.href = "LoginUser.aspx";
    }
    </script>

 

下订单并且判断余额是否足,库存是否足:

aspx.cs:

public partial class Page_ViewAccount : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

      
        decimal cost =Convert.ToDecimal( Session["cost"]);
        Login data = Session["user"] as Login;
        if (data != null)
        {       Literal1.Text = "您的账户余额剩余" + data.Account + "";
            new FruitBF().Update(x,y);
            Literal2.Text = "欢迎您:" + data.Name;
            if (data.Account >= cost)
            {
                data.Account = data.Account - cost; Literal1.Text = "您的账户余额剩余" + data.Account + "元";
                Session["cart"] = null;
            }
            else
            {
                Literal1.Text = "对不起,余额不足!!!!";
            }
              
else { Literal1.Text = "库存不足!!!!"; new FruitBF().Delete(x); } } else { Response.Redirect("Sorry.aspx"); } } }

aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ViewAccount.aspx.cs" Inherits="Page_ViewAccount" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
     <style>
        .index
         {
            background-color:#6d9aea;
            width:100%;
            height:1000px;
        }
        .change {
            position:absolute;
            top:222px;
            left:400px;
            height:400px;
            width:500px;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div class="index">
        <h1>查看账户余额</h1>
        <h2><asp:Literal ID="Literal2" runat="server"></asp:Literal></h2>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <p>&nbsp;</p>
            <div class="change">
                <h2>您好:<asp:Literal ID="Literal4" runat="server"></asp:Literal></h2>
                <asp:Literal ID="Literal1" runat="server"></asp:Literal>
            </div>
          <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href="Index.aspx">浏览商品&nbsp;&nbsp;</a> </p>
        <p style="margin-left: 120px">&nbsp; <a href="ViewAccount.aspx">查看账户</a></p>
        <p style="margin-left: 120px">&nbsp; <a href="ViewCart.aspx">查看购物车<asp:Literal ID="Literal3" runat="server"></asp:Literal>
            </a></p>
    </div>
    </form>
</body>
</html>

 

效果图:

Webform——购物车_第5张图片

Webform——购物车_第6张图片Webform——购物车_第7张图片

 

 

 

Webform——购物车_第8张图片

Webform——购物车_第9张图片

Webform——购物车_第10张图片

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