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;
using shop.DbBase;
using System.Text;
//該源碼下載自www.51aspx.com(５１ａsｐｘ．ｃｏｍ)

namespace shop
{
	/// <summary>
	/// shoppingCart 的摘要說明。
	/// </summary>
	public class shoppingCart : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid myGrid;
		protected System.Web.UI.WebControls.ImageButton imgUpdateCart;
		protected System.Web.UI.WebControls.Label lblSum;
		protected System.Web.UI.WebControls.ImageButton imgBtnClear;

		#region 自定義私有變量
		private double dSum;
		//private string sProductId;
		#endregion
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 獲得商品的信息
			UpdateCart();
		}

		private void UpdateCart()
		{
			#region Version 1.0
			/*
			dSum = 0;

			Hashtable oHT = (Hashtable)Session["ProductInCart"];
			IDictionaryEnumerator oIDE = oHT.GetEnumerator();
			Hashtable oHTNum = new Hashtable();
			StringBuilder sbSql = new StringBuilder();
			sbSql.Append("Select ProductId,PName,PMemberPrice,1 from product where ProductId in (");
			while(oIDE.MoveNext())
			{
				sbSql.Append(oIDE.Key.ToString()+",");
				oHTNum.Add(oIDE.Key.ToString(),oIDE.Value.ToString());
			}
			sbSql.Remove(sbSql.Length - 1,1);
			sbSql.Append(")");
			DataSet oDS = OleBase.ExecuteSql4Ds(sbSql.ToString());
			
			foreach(DataRow oDR in oDS.Tables[0].Rows)
			{
				oDR.ItemArray[3] = oHTNum[oDR.ItemArray[0]].ToString();
				dSum += double.Parse(oDR.ItemArray[2].ToString())*int.Parse(oDR.ItemArray[3].ToString());
			}
			*/
			#endregion
            //新建數(shù)據(jù)表
			DataTable oDT = new DataTable();
			oDT.Columns.Add("ProductId");
			oDT.Columns.Add("PName");
			oDT.Columns.Add("PMemberPrice");
			oDT.Columns.Add("PNumber");

			dSum = 0;
            //判斷購物車中是否存在數(shù)據(jù)
			if(!object.Equals(Session["ProductInCart"],null))
			{
				Hashtable oHT = (Hashtable)Session["ProductInCart"];
				IDictionaryEnumerator oIDE = oHT.GetEnumerator();
				DataRow oDR;
				while(oIDE.MoveNext())
				{
					oDR = oDT.NewRow();
                    //定義一個sql查詢語句
					string sSql = "Select ProductId,PName,PMemberPrice from product where ProductId=" + oIDE.Key.ToString();
                    //調(diào)用類中的方法
					DataSet oDS = OleBase.ExecuteSql4Ds(sSql);
				    oDR["ProductId"] = oDS.Tables[0].Rows[0].ItemArray[0].ToString();
					oDR["PName"] = oDS.Tables[0].Rows[0].ItemArray[1].ToString();
					oDR["PMemberPrice"] = oDS.Tables[0].Rows[0].ItemArray[2].ToString();
					oDR["PNumber"] = oIDE.Value.ToString();
                    //獲得商品的總額
					dSum += double.Parse(oDR["PMemberPrice"].ToString())*int.Parse(oDR["PNumber"].ToString());
				
					oDT.Rows.Add(oDR);
				}
			}
            //設(shè)置myGrid的數(shù)據(jù)源
			myGrid.DataSource = oDT.DefaultView;
            //綁定myGrid
			myGrid.DataBind();
            //將商品的總額綁定到lblSum控件上
			lblSum.Text = dSum.ToString();
		}


		private void imgUpdateCart_Click(object sender,ImageClickEventArgs e)
		{
			Label oLblProductId;
			TextBox oTxtNumber;
			CheckBox oChkRemove;
            //判斷購物中是否存在數(shù)據(jù)
			if(!object.Equals(Session["ProductInCart"],null))
				Session.Remove("ProductInCart");
			Session["ProductInCart"] = new Hashtable();
			for(int i=0;i<myGrid.Items.Count;i++)
			{
				oLblProductId = (Label)myGrid.Items[i].FindControl("lblProductId");
				oTxtNumber = (TextBox)myGrid.Items[i].FindControl("txtNumber");
				oChkRemove = (CheckBox)myGrid.Items[i].FindControl("chkRemove");
				if(!oChkRemove.Checked)
					((Hashtable)Session["ProductInCart"]).Add(oLblProductId.Text,oTxtNumber.Text);
			}
            //重新綁定
			UpdateCart();
		}

		private void imgBtnClear_Click(object sender,ImageClickEventArgs e)
		{
			Session.Remove("ProductInCart");
			UpdateCart();
		}

		#region Web 窗體設(shè)計器生成的代碼
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 該調(diào)用是 ASP.NET Web 窗體設(shè)計器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 設(shè)計器支持所需的方法 - 不要使用代碼編輯器修改
		/// 此方法的內(nèi)容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.imgUpdateCart.Click += new System.Web.UI.ImageClickEventHandler(this.imgUpdateCart_Click);
			this.imgBtnClear.Click += new System.Web.UI.ImageClickEventHandler(this.imgBtnClear_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
	}
}