1using System;
  2using System.Collections;
  3using System.ComponentModel;
  4using System.Data;
  5using System.Drawing;
  6using System.Web;
  7using System.Web.SessionState;
  8using System.Web.UI;
  9using System.Web.UI.WebControls;
 10using System.Web.UI.HtmlControls;
 11//该源码下载自www.51aspx.com(５１ａsｐｘ．ｃｏｍ)
 12using MyBookShop.BusinessLogicLayer;
 13
 14namespace MyBookShop.Web
 15...{
 16    /**//// <summary>
 17    /// CartView 的摘要说明。
 18    /// </summary>
 19    public partial class CartView : System.Web.UI.Page
 20    ...{
 21
 22        /**//// <summary>
 23        /// 页面加载事件
 24        /// </summary>
 25        /// <param name="sender"></param>
 26        /// <param name="e"></param>
 27        protected void Page_Load(object sender, System.EventArgs e)
 28        ...{
 29            if(!IsPostBack)
 30                InitData();
 31        }
 32
 33        /**//// <summary>
 34        /// 查询当前用户的购物篮,初始化页面数据
 35        /// </summary>
 36        private void InitData()
 37        ...{
 38            int userId=0;
 39            if(Session["user_id"]!=null)
 40                userId=Convert.ToInt32(Session["user_id"].ToString());
 41            DataTable dt=Cart.Query(userId);
 42            GV.DataSource=dt;
 43            GV.DataBind();        
 44        }
 45
 46        /**//// <summary>
 47        /// 返回按钮的单击事件
 48        /// </summary>
 49        /// <param name="sender"></param>
 50        /// <param name="e"></param>
 51        protected void ButtonBack_Click(object sender, System.EventArgs e)
 52        ...{
 53            Response.Redirect("BookList.aspx");
 54        }
 55
 56        /**//// <summary>
 57        /// DataGrid编辑按钮列单击事件
 58        /// </summary>
 59        /// <param name="source"></param>
 60        /// <param name="e"></param>
 61        private void DG_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
 62        ...{
 63            //设置当前修改项的索引
 64            GV.EditIndex= (int)e.Item.ItemIndex;
 65            InitData();         
 66        }
 67
 68        /**//// <summary>
 69        /// DataGrid取消按钮列单击事件
 70        /// </summary>
 71        /// <param name="source"></param>
 72        /// <param name="e"></param>
 73        private void DG_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
 74        ...{
 75            //设置修改项的索引为-1，即没有行处于被修改状态
 76            GV.EditIndex = -1; 
 77            InitData();    
 78        }
 79
 80        /**//// <summary>
 81        /// 去结算中心按钮单击事件
 82        /// </summary>
 83        /// <param name="sender"></param>
 84        /// <param name="e"></param>
 85        protected void ButtonBuy_Click(object sender, System.EventArgs e)
 86        ...{
 87            Response.Redirect("Bill.aspx");
 88        }
 89
 90        protected void DG_SelectedIndexChanged(object sender, System.EventArgs e)
 91        ...{
 92        
 93        }
 94
 95        /**//// <summary>
 96        /// 按钮单击事件
 97        /// </summary>
 98        /// <param name="sender"></param>
 99        /// <param name="e"></param>
100        protected void GV_RowCommand(object sender, GridViewCommandEventArgs e)
101        ...{
102            int index = Convert.ToInt32(e.CommandArgument); //待处理的行下标
103            int cartId = -1;
104            Cart cart = new Cart();
105
106            switch (e.CommandName)
107            ...{
108                    //编辑
109                case "Edit":
110                    GV.EditIndex = index;
111                    break;
112
113                    //修改
114                case "Update":
115                    cartId = Convert.ToInt32(GV.Rows[index].Cells[0].Text);
116                    Hashtable ht = new Hashtable();
117                    ht.Add("Amount", ((TextBox)GV.Rows[index].Cells[2].Controls[0]).Text.ToString());                    
118                    cart.Update(ht, cartId);
119                    GV.EditIndex = -1;
120                    break;
121
122                    //取消
123                case "Cancel":
124                    GV.EditIndex = -1;
125                    break;
126
127                    //删除
128                case "Delete":
129                    cartId = Convert.ToInt32(GV.Rows[index].Cells[0].Text);
130                    cart.RemoveBook(cartId);    //利用Cart的Remove方法,删除某种图书
131                    break;
132                default:
133                    break;
134            }
135            InitData();
136        }
137
138        protected void GV_RowEditing(object sender, GridViewEditEventArgs e)
139        ...{
140        }
141
142        protected void GV_RowUpdating(object sender, GridViewUpdateEventArgs e)
143        ...{
144
145        }
146        protected void GV_RowDeleting(object sender, GridViewDeleteEventArgs e)
147        ...{
148
149        }
150        protected void GV_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
151        ...{
152
153        }
154}
155}
156