default.aspx.cs

在书店系统,access数据库和.net

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>
	/// _Default 的摘要说明。
	/// </summary>
	public class _Default : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataList dlt_class1;
		protected System.Web.UI.WebControls.DataList dlt_class2;
		protected System.Web.UI.WebControls.HyperLink HyperLink1;
		protected System.Web.UI.WebControls.Button btn_submit;
		protected System.Web.UI.WebControls.TextBox tbx_uid;
		protected System.Web.UI.WebControls.TextBox tbx_upassword;
		protected System.Web.UI.WebControls.TextBox tbx_bid;
		protected System.Web.UI.WebControls.Button btn_search;
		protected System.Web.UI.WebControls.Label lbl_message;
		protected System.Web.UI.WebControls.HyperLink hlk_advsearchforcust;
		protected System.Web.UI.WebControls.HyperLink hlk_BookListSortByC1;
		protected System.Web.UI.WebControls.HyperLink hlk_BookListSortByC2;
		protected System.Web.UI.WebControls.HyperLink hlk_BookListSortByC0;
		protected System.Web.UI.WebControls.HyperLink hlk_orderstate;
		protected System.Web.UI.WebControls.DataList dlt_class0;
	
		private void Page_Load(object sender, System.EventArgs e)
		{	
			BindList();
		}
		#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_submit.Click += new System.EventHandler(this.btn_submit_Click);
			this.btn_search.Click += new System.EventHandler(this.btn_search_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
		public void BindList()
		{	//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MMS数据库
			SqlConnection cn= new SqlConnection (strconn);
		//创建查询语句--按计算机分类,只选出最前面的三种，按BID号降序，即显示新增的书
			string sqlSortByC1="select top 3 * from book,bookprice where book.bid=bookprice.ppid and book.bgroup=1 order by bid desc";
			//创建SqlDataAdapter对象,调用视图
			SqlDataAdapter da1=new SqlDataAdapter (sqlSortByC1,cn);
			//创建并填充DataSet
			DataSet ds1=new DataSet ();
			da1.Fill (ds1);
			dlt_class1.DataSource =ds1;
			dlt_class1.DataBind ();
		//创建查询语句--按科普分类，只选出最前面的三种，按BID号降序，即显示新增的书
			string sqlSortByC2="select top 3 * from book,bookprice where book.bid=bookprice.ppid and book.bgroup=2 order by bid desc";
			//创建SqlDataAdapter对象,调用视图
			SqlDataAdapter da2=new SqlDataAdapter (sqlSortByC2,cn);
			//创建并填充DataSet
			DataSet ds2=new DataSet ();
			da2.Fill (ds2);
			dlt_class2.DataSource =ds2;
			dlt_class2.DataBind ();
		//创建查询语句--按其他分类，只选出最前面的三种，按BID号降序，即显示新增的书
			string sqlSortByC0="select top 3 * from book,bookprice where book.bid=bookprice.ppid and book.bgroup=0 order by bid desc";
			//创建SqlDataAdapter对象,调用视图
			SqlDataAdapter da0=new SqlDataAdapter (sqlSortByC0,cn);
			//创建并填充DataSet
			DataSet ds0=new DataSet ();
			da0.Fill (ds0);
			dlt_class0.DataSource =ds0;
			dlt_class0.DataBind ();
			cn.Close ();
		}

		private void btn_submit_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 ();
			//构造SQL语句，该语句在Users表中检查用户名和密码是否正确
			string mysql= "select * from Users where Uid='"+tbx_uid.Text +"'and UPassword='"+tbx_upassword.Text +"'";
			//创建Command对象
			SqlCommand cm=new SqlCommand  (mysql,cn);
			//执行ExecuteReader ()方法
			SqlDataReader dr=cm.ExecuteReader ();
			if(dr.Read ())
			{
				lbl_message.Text= "";
				//保存当前用户名及用户权限
				Session["uid"]=dr["uid"];
				Session["upower"]=dr["upower"];
				lbl_message.Text="欢迎您！"+Session["uid"];
				if(Session["upower"].ToString ()=="1")				
				{	//进入管理人员界面
					Response.Redirect ("bookmanage.aspx");
				}
				else
				{	//普通用户,界面不变
				}
			}
			else
			{
					lbl_message.Text ="对不起，您的用户名/密码不正确，请重新输入";
			}
			//关闭连接
			cn.Close();
		}

		private void btn_search_Click(object sender, System.EventArgs e)
		{	//进入书目详细信息页
			int varbid=Convert.ToInt16 (tbx_bid.Text .ToString ());
			Response.Redirect ("bookdetail.aspx?bid="+varbid);
		}


	}
}