bookdetail.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>
	/// BookDetail 的摘要说明。
	/// </summary>
	public class BookDetail : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label lbl_bid;
		protected System.Web.UI.WebControls.TextBox tbx_bname;
		protected System.Web.UI.WebControls.TextBox tbx_bauthor;
		protected System.Web.UI.WebControls.TextBox tbx_bpress;
		protected System.Web.UI.WebControls.TextBox tbx_bgroup;
		protected System.Web.UI.WebControls.TextBox tbx_bisbn;
		protected System.Web.UI.WebControls.TextBox tbx_bdescribe;
		protected System.Web.UI.WebControls.TextBox tbx_pprice;
		protected System.Web.UI.WebControls.TextBox tbx_pdiscount;
		protected System.Web.UI.WebControls.TextBox tbx_nowprice;
		protected System.Web.UI.WebControls.DropDownList ddl_oquantity;
		protected System.Web.UI.WebControls.Label lbl_message;
		protected System.Web.UI.WebControls.HyperLink hlk_default;
		protected System.Web.UI.WebControls.Button btn_addorder;
	
		private void Page_Load(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);
			//创建查询相应书目信息的sql语句
			string mysql="select * from book,bookprice where book.bid=bookprice.ppid and book.bid=@bid";
			//创建SqlCommand
			SqlCommand cm=new SqlCommand (mysql,cn);
			//添加并设置参数的值
			cm.Parameters .Add ("@BID", SqlDbType.Int );
			cm.Parameters ["@BID"].Value =Request.QueryString [0];
			//打开连接
			cn.Open ();
			//执行ExecuteReader
			SqlDataReader dr=cm.ExecuteReader ();
			if(dr.Read ())//有数据读出，即有匹配用户
			{
				//进行Label绑定
				lbl_bid.Text =dr["bid"].ToString ();
				tbx_bname.Text =dr["bname"].ToString ();
				tbx_bisbn.Text =dr["bisbn"].ToString ();
				tbx_bauthor.Text =dr["bauthor"].ToString ();
				tbx_bpress.Text =dr["bpress"].ToString ();
				tbx_pprice.Text =dr["pprice"].ToString ();
				tbx_pdiscount.Text  =dr["pdiscount"].ToString ();
				if(dr["bgroup"].ToString ()=="0") tbx_bgroup.Text ="其他";
				if(dr["bgroup"].ToString ()=="1") tbx_bgroup.Text ="计算机";
				if(dr["bgroup"].ToString ()=="2") tbx_bgroup.Text ="科普";
				tbx_bdescribe.Text =dr["bdescribe"].ToString ();
				double pdiscount=Convert.ToInt32 (dr["pdiscount"].ToString ());
				double pprice=Convert.ToDouble (dr["pprice"].ToString ());
				tbx_nowprice.Text =Convert.ToString (pdiscount*pprice*0.1);
				cn.Close ();
			}
			
			else
			{
				Response.Write ("该书目不存在，请返回");
				Response.End ();
			}
			
		}

		#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_addorder.Click += new System.EventHandler(this.btn_addorder_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btn_addorder_Click(object sender, System.EventArgs e)
		{
			//用异常判断语句判断用户是否已登入，如果用户未登入Session["UID"].ToString ()将会是异常操作
			try//用户用户为合法登入用户
			{	Session["UID"].ToString ();
				//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cm，用于order表中数据的操作
				SqlCommand cm=new SqlCommand ("orderadd",cn);
				//设置存储类型
				cm.CommandType =CommandType.StoredProcedure ;
				//添加参数
				cm.Parameters .Add ("@OBID",SqlDbType.Int );
				cm.Parameters .Add ("@OUID",SqlDbType.VarChar );
				cm.Parameters .Add ("@OQuantity",SqlDbType.Int );
				cm.Parameters .Add ("@ODate",SqlDbType.DateTime );
				//给参数付值
				string obidvalue=lbl_bid.Text .ToString ();
				cm.Parameters ["@OBID"].Value =Convert.ToInt16 (obidvalue);
				cm.Parameters ["@OUID"].Value =Session["UID"];
				string oquantityvalue=ddl_oquantity.SelectedItem .Value .ToString ();
				cm.Parameters ["@OQuantity"].Value =Convert.ToInt16 (oquantityvalue);
				cm.Parameters ["@ODate"].Value =System.DateTime .Now;
				cm.ExecuteNonQuery ();
				cn.Close ();
				Response.Redirect ("orderstate.aspx");
			}
			//用户未登入
			catch
			{	lbl_message.Text ="您尚未登入，请返回登入后再选购图书";
			}
		}


	}
}