orderstate.aspx.cs

网上书店

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 System.Configuration ;
using System.Data .SqlClient ;

namespace BMS
{
	/// <summary>
	/// OrderState 的摘要说明。
	/// </summary>
	public class OrderState : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button btn_buy;
		protected System.Web.UI.WebControls.HyperLink hlk_default;
		protected System.Web.UI.WebControls.DataGrid dgd_orderstate;
		protected System.Web.UI.WebControls.Label lbl_count;
	
		private void Page_Load(object sender, System.EventArgs e)
		{	//判断用户是否为合法用户
			try{Session["UID"].ToString ();
			}
			catch{
				Response.Write ("您不是合法用户，请登入后再操作，<a href='default.aspx'>返回</a>");
				Response.End ();
			}
			if(!IsPostBack)
			{
				BindGrid();
				BindLabel();
			}
		}
		public void BindGrid()
		{	//从文件Web.config中读取连接字符串
			string strconn= ConfigurationSettings.AppSettings["dsn"];
			//连接本地计算机的BMS数据库
			SqlConnection cn= new SqlConnection (strconn);
			//创建选择语句
			string orderstate="SELECT BID,BISBN,BName,BAuthor,BPress,PPrice,PDiscount,OID,OBID,OUID,OQuantity,OBuy,PPrice*PDiscount*0.1  nowprice,PPrice*PDiscount*OQuantity*0.1 allprice FROM Book,BookPrice,Orders WHERE orders.obid=book.bid and orders.obid=bookprice.ppid 	and orders.obuy=0 and orders.ouid='"+Session["UID"].ToString() +"'";
			//创建SqlDataAdapter对象,调用视图
			SqlDataAdapter da=new SqlDataAdapter (orderstate,cn);
			//创建并填充DataSet
			DataSet ds=new DataSet ();
			da.Fill (ds);
			dgd_orderstate.DataSource =ds;
			dgd_orderstate.DataBind ();
			cn.Close ();
		}
		//绑定所预购图书总和到lbl_count上
		public void BindLabel()
		{	//从文件Web.config中读取连接字符串
			string strconn= ConfigurationSettings.AppSettings["dsn"];
			//连接本地计算机的BMS数据库
			SqlConnection cn= new SqlConnection (strconn);
			cn.Open ();
			//创建读取当前用户预购商品的价格总和
			string ordersum="SELECT sum(PPrice*PDiscount*OQuantity*0.1) ordersum FROM Book,BookPrice,Orders WHERE orders.obid=book.bid and orders.obid=bookprice.ppid 	and orders.obuy=0 and orders.ouid='"+Session["UID"].ToString() +"'";
			SqlCommand cm=new SqlCommand (ordersum,cn);
			SqlDataReader dr =cm.ExecuteReader ();
			dr.Read ();
			if (dr["ordersum"].ToString ()=="")
			lbl_count.Text ="0";
			else 
			lbl_count.Text=dr["ordersum"].ToString ();
			cn.Close ();
		}
		public void DataGrid_Edit(Object sender,DataGridCommandEventArgs E)
		{
			dgd_orderstate.EditItemIndex =(int)E.Item .ItemIndex ;
			BindGrid();
		}
		public void DataGrid_Cancel(Object sender,DataGridCommandEventArgs E)
		{
			dgd_orderstate.EditItemIndex =-1;
			BindGrid();
		}
		public void DataGrid_Update(Object sender,DataGridCommandEventArgs E)
		{	//从文件Web.config中读取连接字符串
			string strconn= ConfigurationSettings.AppSettings["dsn"];
			//连接本地计算机的BMS数据库
			SqlConnection cn= new SqlConnection (strconn);
			cn.Open ();
			SqlCommand cm=new SqlCommand ("ordermodify",cn);
			//将命令类型转为存储类型
			cm.CommandType =CommandType.StoredProcedure ;
			cm.Parameters .Add ("@OID",SqlDbType.Int );
			cm.Parameters .Add (new SqlParameter ("@OQuantity",SqlDbType.Int));
			//从DateGrid中取得更新依据内容,Cells [0]为OQuantity列
			string OIDvalue=E.Item.Cells[0].Text .ToString ();
			cm.Parameters ["@OID"].Value =Convert.ToInt16 (OIDvalue);	
			//从DateGrid中取得更新内容
			string OQuantityvalue=((TextBox)E.Item.FindControl ("tbx_oquantity")).Text .ToString ();
			cm.Parameters ["@OQuantity"].Value =Convert.ToInt16 (OQuantityvalue);
			cm.ExecuteNonQuery ();
			dgd_orderstate.EditItemIndex =-1;
			BindGrid();
			BindLabel();

		}
		public void DataGrid_Delete(Object sender,DataGridCommandEventArgs E)
		{
			//从文件Web.config中读取连接字符串
			string strconn= ConfigurationSettings.AppSettings["dsn"];
			//连接本地计算机的BMS数据库
			SqlConnection cn= new SqlConnection (strconn);
			cn.Open ();
			SqlCommand cm=new SqlCommand ("orderdelete",cn);
			cm.CommandType =CommandType.StoredProcedure ;
			cm.Parameters .Add ("@OID",SqlDbType.Int );
			//从DateGrid中取得更新内容
			//Cells [0]为OID列
			string oidvalue=E.Item.Cells [0].Text .ToString ();
			cm.Parameters ["@OID"].Value =Convert.ToInt32 (oidvalue);
			cm.ExecuteNonQuery ();
			dgd_orderstate.EditItemIndex =-1;
			BindGrid();
		}
		public void DataGrid_Page(Object sender,DataGridPageChangedEventArgs E)
		{
			dgd_orderstate.CurrentPageIndex =E.NewPageIndex ;
			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.btn_buy.Click += new System.EventHandler(this.btn_buy_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btn_buy_Click(object sender, System.EventArgs e)
		{	//从文件Web.config中读取连接字符串
			string strconn= ConfigurationSettings.AppSettings["dsn"];
			//连接本地计算机的BMS数据库
			SqlConnection cn= new SqlConnection (strconn);
			cn.Open ();
			//创建SQL语句，该语句执行将预购状态改为已购
			string ordertobuy="UPDATE Orders SET OBuy = 1,OBuyDate ='"+System.DateTime .Now +"' WHERE OBuy=0 and OUID ='"+Session["UID"].ToString ()+"'";
			SqlCommand cm=new SqlCommand (ordertobuy,cn);
			cm.ExecuteNonQuery ();
			cn.Close ();
			Response.Redirect ("buysuccess.aspx");
		
		}
	}
}