addtocart.aspx.cs

ASP。NET免费毕业论文设计：ASP[1].NET网络书店(C_,全源码提供) 采用C#语言编写

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 BookShop
{
	/// <summary>
	/// AddToCart 的摘要说明。
	/// </summary>
	public class AddToCart : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid dg_Cart;
		protected System.Web.UI.WebControls.HyperLink hl_Exit;
		protected System.Web.UI.WebControls.Button btn_CleanCart;
		protected System.Web.UI.WebControls.Button btn_PutOrder;
		protected System.Web.UI.WebControls.Literal ErrMsg;
	
		Hugo.Book myBook=new Hugo.Book();
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			int BookId;
			HttpCookie cookie;
			bool tempbl=false;
			ErrMsg.Visible =false;
			string tempstr;
			if(!IsPostBack)
			{
				if(Object.Equals(Session["UserName"],null))
				{
					Response.Redirect("Error.aspx");
				}
				else
				{
					if(!Object.Equals(Request.QueryString["BookId"],null))
				    {
					
						BookId=int.Parse(Request.QueryString["BookId"].ToString());
						if(Object.Equals(Request.Cookies["HugoShopBookCart"],null)) 
						{
							cookie = new HttpCookie("HugoShopBookCart");
						}
						else
							cookie=Request.Cookies["HugoShopBookCart"];
						for(int i=0;i<cookie.Values.Count;i++)
						{
							if(!Object.Equals(cookie.Values.AllKeys[i],null))
							{
								tempstr=cookie.Values.AllKeys[i].ToString();
								if(tempstr.Trim()!="")
								{
									if(BookId==int.Parse(cookie.Values.AllKeys[i]))
									{
										tempbl=true;
										break;
									}
								}
							}
						}
						if(!tempbl)
						{
							cookie.Values.Add(BookId.ToString(),"1");
						}
						else
						{
							ShowErrMsg("Cart Have This Book,Please Change It's Number.");
						}
						TimeSpan ts = new TimeSpan(0,0,10,0);
						cookie.Expires=DateTime.Now + ts;
						Response.AppendCookie(cookie);
					}
					string url;
					try
					{
						url=Request.QueryString["Backurl"].ToString();
						hl_Exit.NavigateUrl=url; 
					}
					catch
					{
						hl_Exit.NavigateUrl="main.aspx" ;
					}
					BindGrid();
				}
			}
		}

		#region Web Form Designer generated code
	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.dg_Cart.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dg_Cart_CancelCommand);
		this.dg_Cart.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dg_Cart_EditCommand);
		this.dg_Cart.UpdateCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dg_Cart_UpdateCommand);
		this.btn_CleanCart.Click += new System.EventHandler(this.btn_CleanCart_Click);
		this.btn_PutOrder.Click += new System.EventHandler(this.btn_PutOrder_Click);
		this.Load += new System.EventHandler(this.Page_Load);

	}
		#endregion
	/// <summary>
	/// Push Dialog,Show error message
	/// </summary>
	/// <param name="err">Error Message Detail</param>
		private void ShowErrMsg(string err)
		{
			string str;
			str="<script language='javascript'>";
			str+=" alert('" +err + "')";
			str+="</script>";
			ErrMsg.Visible=true;
			ErrMsg.Text=str;				
		}


		private void BindGrid()
		{
			DataTable myDt;
			DataRow myDr;
			string str="";
			
			//HttpCookie cookie;
			myDt=new DataTable();
			myDt.Columns.Add(new DataColumn("id",str.GetType()));
			myDt.Columns.Add(new DataColumn("Name",str.GetType()));
			myDt.Columns.Add(new DataColumn("Price",str.GetType()));
			myDt.Columns.Add(new DataColumn("Number",str.GetType()));
			myDt.Columns.Add(new DataColumn("Discount",str.GetType()));
			myDt.Columns.Add(new DataColumn("Totle",str.GetType()));
			if(!Object.Equals(Request.Cookies["HugoShopBookCart"],null)) 
			{
				HttpCookie cookie=Request.Cookies["HugoShopBookCart"];
				for(int i=0;i<cookie.Values.Count;i++) 
				{
					int id;
					DataRow tempDr;
					double totle;
					myDr=myDt.NewRow();
					if((cookie.Values.AllKeys[i]!="")&&(cookie.Values[i]!=""))
					{
						id=int.Parse(cookie.Values.AllKeys[i]);
						tempDr=myBook.GetBookDetail(id);
						myDr[0]=id;
						myDr[1]=tempDr["Name"];
						myDr[2]=tempDr["Price"].ToString();
						myDr[3]=cookie.Values[i];
						myDr[4]=tempDr["Discount"].ToString();
						totle=double.Parse(myDr[2].ToString())*double.Parse(myDr[3].ToString());
						totle*=double.Parse(myDr[4].ToString());
						myDr[5]=totle.ToString() ;
						myDt.Rows.Add(myDr);
					}
				}

			}
			dg_Cart.DataSource=myDt.DefaultView;
			dg_Cart.DataBind();
			
		}

		private void btn_CleanCart_Click(object sender, System.EventArgs e)
		{
			System.Web.UI.WebControls.CheckBox tempCB;
			HttpCookie cookie=new HttpCookie("HugoShopBookCart");
			for(int i=0;i<dg_Cart.Items.Count ;i++)
			{
				tempCB=(System.Web.UI.WebControls.CheckBox)dg_Cart.Items[i].FindControl("ckb_Select");
				if(!Object.Equals(tempCB,null))
				{
					if (!tempCB.Checked)
					{
						string id;
						string count;
						id=dg_Cart.Items[i].Cells[0].Text;
						count=dg_Cart.Items[i].Cells[5].Text;
						if (count.Trim()=="")
							count="0";
						cookie.Values.Add(id,count);
					}
				}
			}
			TimeSpan ts = new TimeSpan(0,0,10,0);
			cookie.Expires=DateTime.Now + ts;
			Response.AppendCookie(cookie);
			Response.Redirect("AddToCart.aspx");
		
		}

		public void AllSelect()
		{
			bool tempbl;
			System.Web.UI.WebControls.CheckBox tempCK;
			tempCK=(System.Web.UI.WebControls.CheckBox)Page.FindControl("ckb_All");
			tempbl=tempCK.Checked;
			for(int i=0;i<dg_Cart.Items.Count;i++)
			{
				tempCK=(System.Web.UI.WebControls.CheckBox)dg_Cart.Items[i].FindControl("ckb_Select");
				tempCK.Checked=!tempbl;
			}


		}

		private void dg_Cart_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			dg_Cart.EditItemIndex=e.Item.ItemIndex ;
			BindGrid();
		}

		private void dg_Cart_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			dg_Cart.EditItemIndex=-1;
			BindGrid();
		}

		private void dg_Cart_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			string Number;
			Number=((TextBox)e.Item.Cells[4].Controls[0]).Text;
			HttpCookie cookie=new HttpCookie("HugoShopBookCart");
			for(int i=0;i<dg_Cart.Items.Count ;i++)
			{
				string id;
				string count;
				id=dg_Cart.Items[i].Cells[0].Text;
				if(e.Item.ItemIndex==i)
					count=Number;
				else
				    count=dg_Cart.Items[i].Cells[4].Text;
				if (count.Trim()=="")
					count="0";
				cookie.Values.Add(id,count); 
				
			}
			TimeSpan ts = new TimeSpan(0,0,10,0);
			cookie.Expires=DateTime.Now + ts;
			Response.AppendCookie(cookie);
			dg_Cart.EditItemIndex=-1;
			Response.Redirect("AddToCart.aspx");

		}

		private void btn_PutOrder_Click(object sender, System.EventArgs e)
		{
			try
			{
				Hugo.BookShop.Order order = new Hugo.BookShop.Order();

				HttpCookie cookie=new HttpCookie("HugoShopBookCart");
				for(int i=0;i<dg_Cart.Items.Count ;i++)
				{
					string id;
					string count;
					id=dg_Cart.Items[i].Cells[0].Text;
					count=dg_Cart.Items[i].Cells[4].Text;
					if (count.Trim()=="")
						count="1";
					order.Add( new Hugo.BookShop.OrderDetails(int.Parse(id),int.Parse(count)));
				}
				int orderId = order.Have(int.Parse(Session["UserID"].ToString()));

				TimeSpan ts = new TimeSpan(0,0,10,0);
				cookie.Expires=DateTime.Now + ts;
				Response.AppendCookie(cookie);
				Response.Redirect("ShowOrder.aspx?orderId="+orderId.ToString());
			}
			catch(Exception ex)
			{
				ShowErrMsg(ex.Message);
			}			
		}


	}
}