快要答辩了，求大哥哥，大姐姐帮帮忙

[fengzhiqingreng]

哪位大哥，大姐，可以帮助小弟的 ，快要考试答辩了，还有点购物车不怎么懂，求帮完善一下，可以留下联系方式，asp.net,不会耽误大家太多时间的，因为很简单（嘿嘿），拜托了，拜托了

[threenewbee]

网上很多，使用cookie或者session保存一张表，记录产品id、数量。

[test2050]

这种事求人不如自己多花点时间搞定它。

[fengzhiqingreng]

还有删除。编辑购物车商品不会做。。。是单层架构。。
前台代码：

<%@ Page Title="" Language="C#" MasterPageFile="~/MemberPortal/MainSite.master" AutoEventWireup="true" CodeFile="Shopping.aspx.cs" Inherits="MemberPortal_Shopping" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <div style=" text-align:left;">
		<h1><img src="image/shopping.gif" width="121" height="21" /></h1>
		<p style=" font-size:18px; font:幼圆;" >您选好的商品:<asp:Label ID="Label1" runat="server" 
                Text="Label" Visible="False"></asp:Label>
        </p>
		
	</div>
    <br /><div>
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
        Width="100%" BackColor="White" BorderColor="#999999" BorderStyle="None" 
            BorderWidth="1px" CellPadding="3" GridLines="Vertical" ShowFooter="True" 
            onrowdatabound="GridView1_RowDataBound" 
            onrowcommand="GridView1_RowCommand" onrowdeleting="GridView1_RowDeleting">
        <AlternatingRowStyle BackColor="#DCDCDC" />
        <Columns>
            <asp:TemplateField HeaderText="图书编号">
                
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Eval("BookId") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="图书名称" FooterText="合计">
               
                <ItemTemplate>
                    <asp:Label ID="Label2" runat="server" Text='<%# Eval("BookName") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="单价">
               
                <ItemTemplate>
                    <asp:Label ID="Label3" runat="server"  Text='<%# Eval("UnitPrice") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="商品个数">
                <ItemTemplate>
                    <asp:Label ID="Label4" runat="server" Text='<%# Bind("Number") %>'></asp:Label>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Number") %>'></asp:TextBox>
                </EditItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="小计">
                              <ItemTemplate>
                                
                                  <asp:Label ID="Label5"  Text="" runat="server"></asp:Label>
                                
                              </ItemTemplate>
                              <EditItemTemplate>
                                  <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                              </EditItemTemplate>
                            </asp:TemplateField>

            <asp:TemplateField HeaderText="操作" ShowHeader="False">
                <ItemTemplate>
                    <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Delete" Text="删除"></asp:LinkButton>
                    <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Edit" Text="编辑"></asp:LinkButton>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
        <FooterStyle BackColor="#CCCCCC" ForeColor="Black" />
        <HeaderStyle BackColor="#000084" Font-Bold="True" ForeColor="White" />
        <PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
        <RowStyle BackColor="#EEEEEE" ForeColor="Black" />
        <SelectedRowStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />
        <SortedAscendingCellStyle BackColor="#F1F1F1" />
        <SortedAscendingHeaderStyle BackColor="#0000A9" />
        <SortedDescendingCellStyle BackColor="#CAC9C9" />
        <SortedDescendingHeaderStyle BackColor="#000065" />
    </asp:GridView></div>
    <div style=" text-align:right; margin-top:10px;">
        <asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/MemberPortal/image/balance.gif" /></div>
</asp:Content>

后台代码：

public partial class MemberPortal_Shopping : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            if(Request.QueryString["Op"]=="BuyBooks"){
                int bookId = Convert.ToInt32(Request.QueryString["bookId"]);
                BuyBooks(bookId);
            }
            if (Session["Cart"] != null)
            {
                BindCart();

            }
            else {
                Label1.Text = "目前还没有购买任何图书";
            }
        }
        

    }

    private void BindCart() {
        GridView1.DataSource = Session["Cart"];
        GridView1.DataBind();
        
    }
    private void BuildCart() {
        DataTable cart = new DataTable();
        cart.Columns.Add("BookId",typeof(Int32));
        cart.Columns.Add("BookName",typeof(string));
        cart.Columns.Add("UnitPrice", typeof(double));
        cart.Columns.Add("Number", typeof(Int32));
       
        Session["Cart"] = cart;
    }
    private void AppendBooks(int bookId,string bookName,double unitPrice,int number) { 
        DataTable cart =Session["Cart"] as DataTable;

        DataRow dr = cart.NewRow();
        dr["BookId"]=bookId;
        dr["BookName"]=bookName;
        dr["UnitPrice"] = unitPrice;
        dr["Number"] = number;
        cart.Rows.Add(dr);
        Session["Cart"] = cart;

    }
    private bool ExistBook(int bookId) {
        DataTable cart = Session["Cart"] as DataTable;

        foreach (DataRow dr in cart.Rows) {
            if (Convert.ToInt32(dr["BookId"]) == bookId) {
                return true;
            }
        }
        return false;
    
    }

    private void UpdateBooks(int bookId)
    {
        DataTable cart = Session["Cart"] as DataTable;

        foreach (DataRow dr in cart.Rows)
        {
            if (Convert.ToInt32(dr["BookId"]) == bookId)
            {
                dr["Number"] = Convert.ToInt32(dr["Number"])+1;
               
            }
        }

        Session["Cart"] = cart;
       

    }
    private void BuyBooks(int bookId) {
        string strConn = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
        SqlConnection conn = new SqlConnection(strConn);
        conn.Open();

        string sql = "select * from Books where Id=@Id";
        SqlDataAdapter dr = new SqlDataAdapter(sql, conn);
        DataSet ds = new DataSet();
        SqlParameter[] paras = new SqlParameter[]{
            new SqlParameter("@Id",bookId),
           
        };
        dr.SelectCommand.Parameters.AddRange(paras);
        dr.Fill(ds, "CategoryTable");
        string bookName = ds.Tables["CategoryTable"].Rows[0][1].ToString();
        double unitPrice = Convert.ToDouble(ds.Tables["CategoryTable"].Rows[0][7].ToString());
        if (Session["Cart"] == null)
        {
            this.BuildCart();
            this.AppendBooks(bookId,bookName, unitPrice ,1);
        }
        else {
            if (ExistBook(bookId))
            {

                this.UpdateBooks(bookId);

            }
            else {
                this.AppendBooks(bookId, bookName, unitPrice ,1);
            }
        }
    
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Attributes.Add("onmouseover", "currentcolor=this.style.backgroundColor;this.style.backgroundColor='#D3D7F5'");
            e.Row.Attributes.Add("onmouseout", "currentcolor=this.style.backgroundColor=currentcolor");

            Label lblPrice = e.Row.FindControl("Label3") as Label;
            Label lblNumber = e.Row.FindControl("Label4") as Label;
            Label lblTotal = e.Row.FindControl("Label5") as Label;

            double UnitPrice = Convert.ToDouble(lblPrice.Text);
            int Number = Convert.ToInt32(lblNumber.Text);
            double Total = UnitPrice * Number;
            lblTotal.Text = Total.ToString();

        }
       
       
    }
    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
       
    }
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
      
    }
}

[fengzhiqingreng]

是的啊[Quote=引用 6 楼 的回复:]
楼主是大学的么？
[/Quote]

[fengzhiqingreng]

感谢提醒帮助，搞定了。。。我是用gridview内置的编辑、删除，还有小计合计都做完了。。就差提交生成订单了。。嘿嘿[Quote=引用 4 楼 的回复:]
<asp:TemplateField ShowHeader="False" HeaderText="操作" Visible="true">
<ItemTemplate>
<asp:LinkButton ID="Linkbutton1" runat="server" Text="修改" CommandName="lb_modify"
CommandArgument='<%#Eval……
[/Quote]

[IT-Style]

用Hashtable或者Dictionary保存数据.
键保存的是商品的ID，值保存的是商品的数据.

[Im_yours]

<asp:TemplateField ShowHeader="False" HeaderText="操作" Visible="true">
<ItemTemplate>
<asp:LinkButton ID="Linkbutton1" runat="server" Text="修改" CommandName="lb_modify"
CommandArgument='<%#Eval("Base_ID")%>'></asp:LinkButton>
<asp:LinkButton ID="Linkbutton2" runat="server" Text="删除" CommandName="lb_del"
CommandArgument='<%#Eval("Base_ID")%>'></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>

后台：
protected void GridView_BD_RowCommand(object sender, GridViewCommandEventArgs e)
{
string _id = e.CommandArgument.ToString();

if(e.CommandName=="lb_modify")
{
修改写这里
}
if (e.CommandName == "lb_del")
{
删除写这里
}
}

[大渣吼吾系渣渣辉]

LZ给力啊，还没毕业就能自己写代码了，我大学时候只顾着玩CS了

[想念旧时光]

楼主是大学的么？

[a402485188]

前台用这么多服务器控件。。。。。看得都头晕。。。。。。。。。。。

[a402485188]

毕业答辩怕个鸟 只不过是一个垃圾形式 学费交齐 考试都过60分就能 毕业了 如果你已经找到工作饿了 立马把毕业证扔给你

[xuan.ye]

淘宝上有卖毕业答辩的

[love_yyou]

什么学校，看起来学的东西还可以。。。。。