st_cartinfo.aspx.cs

it have big power,i hope to do it . happy everyday!

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace STGROUP.ST_Book.ST_Product
{
	/// <summary>
	/// 购物车
	/// </summary>
	public partial class ST_CartInfo : System.Web.UI.Page
	{
	
		protected void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			if (!IsPostBack)
			{
				BindData();	
			}
		}
		/// <summary>
		/// 绑定购物车中的数据：所有的商品
		/// </summary>
		private void BindData()
		{
			ST_BookBiz.ST_Cart cart = (ST_BookBiz.ST_Cart)Session["Cart"];
			DataTable table = null;
			if (cart != null)
			{
				table = cart.GetProductItems();
			}

			DataGrid1.DataSource = table;
			DataGrid1.DataBind();

			
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.DataGrid1.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid1_ItemDataBound);

		}
		#endregion

		protected void btnChange_Click(object sender, System.EventArgs e)
		{
			//如果购买数量发生变化，重新绑定数据
            ST_BookBiz.ST_Cart cart = (ST_BookBiz.ST_Cart)Session["Cart"];
			foreach(DataGridItem item in DataGrid1.Items)
			{
				int productId = int.Parse(item.Cells[5].Text);

				ST_BookBiz.ST_OrderProduct product = cart.GetProduct(productId);

				TextBox txtQuantity = (TextBox)item.FindControl("txtQuantity");
				int tmpQuantity = int.Parse(txtQuantity.Text.Trim());
				product.ST_Quantity = tmpQuantity;
			}
			this.BindData();
			
		}

		private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
		{
			//判断输入的数量是否合法
            foreach(DataGridItem dgi in this.DataGrid1.Items)
			{
				if (dgi.ItemType == ListItemType.Item || dgi.ItemType == ListItemType.AlternatingItem)
				{
					TextBox tb = (TextBox)dgi.FindControl("txtQuantity");
					tb.Attributes["onkeyup"] = "CheckQty(" + tb.ClientID + ")";
				}
			}
		}

		protected void btnNext_Click(object sender, System.EventArgs e)
		{
			//转向到订单生成页面
            Response.Redirect("ST_ShipInfo.aspx", true);
		}
	}
}