welcome.aspx.cs

自己写的一个网上图书馆 可实现图书上传借阅等功能

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
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 e_librarys
{
	/// <summary>
	/// Welcome 的摘要说明。
	/// </summary>
	public partial class Welcome : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label_Placement;
		protected System.Web.UI.WebControls.Label Label1;
	
		protected void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面

            //用户租赁信息显示
			SqlConnection Conn = new SqlConnection("server=(local);database=e_library;uid=sa;pwd=");
			Conn.Open();
			string StrSql="select * from User_Info ,Tenancy,Book_Info  where U_Name='"+Session["U_Name"]+"' and U_ID=T_U_ID and (T_Status=1 or T_Status=2) and T_Return=0 and B_ID=T_B_ID";
			SqlCommand Comm = new SqlCommand(StrSql,Conn);
			SqlDataReader Dr=Comm.ExecuteReader();
			if(Dr.Read())
			{  
				
				Session["B_ID"]=Dr["B_ID"];
				Session["T_Status"]=Dr["T_Status"];
                Label3.Text=Session["U_Name"].ToString();

				if(Dr["T_Status"].ToString()=="2")
				{
					LinkButton1.Text=Dr["B_Name"].ToString();
					LinkButton2.Text=Dr["B_Name"].ToString();
					if(Dr["T_MsgUser"].ToString()=="1")
					　　LinkButton3.Text=Dr["B_Name"].ToString();
					else
                    　　LinkButton3.Text="没有要到期图书";
					if(Dr["T_TimeOut"].ToString()=="1")
					　　LinkButton4.Text=Dr["B_Name"].ToString();
					else
						LinkButton4.Text="没有要超期图书";

				}
				else
				{
					LinkButton1.Text=Dr["B_Name"].ToString();
					LinkButton2.Text="您还没租赁图书";
					LinkButton3.Text="您还没租赁图书";
					LinkButton4.Text="您还没租赁图书";
				}

				}
					else
			{
				Session["T_Status"]=0;
				LinkButton1.Text="您还没预定图书";
				LinkButton2.Text="您还没预定图书";
				LinkButton3.Text="您还没预定图书";
				LinkButton4.Text="您还没预定图书";
			}
			
			Conn.Close();



            //绑定推荐版
           
            Conn.Open();
             StrSql = "select top 10 * from Book_Info order by B_RentCount desc";
            SqlDataAdapter Da = new SqlDataAdapter(StrSql, Conn);
            DataSet Ds = new DataSet();
            Da.Fill(Ds);
            DataList_Detail0.DataSource = Ds.Tables[0];
            DataList_Detail0.DataBind();
            Conn.Close();


            //绑定排行版
            
            Conn.Open();
            StrSql = "select top 10 * from Book_Info order by B_Count desc";
             Da = new SqlDataAdapter(StrSql, Conn);
             Ds = new DataSet();
            Da.Fill(Ds);
            DataList_Detail.DataSource = Ds.Tables[0];
            DataList_Detail.DataBind();
            Conn.Close();
		}

		#region Web 窗体设计器生成的代码
		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()
		{    

		}
		#endregion

		

		protected void Button_All_Click(object sender, System.EventArgs e)
		{
			
			string StrSql="select * from Book_Info";
			Session["StrSql"]=StrSql;
		Response.Redirect("Massage.aspx");

		}

		protected void Button_HomePage_Click(object sender, System.EventArgs e)
		{
		Response.Redirect("Welcome.aspx");
		}

		protected void Button_ComputerBooks_Click(object sender, System.EventArgs e)
		{
			
			string StrSql="select * from Book_Info a,Book_Style b,Book_DetailStyle c where B_S_Name='电脑书籍'  and b.B_S_ID=c.B_S_ID and a.B_BDS_ID=c.B_DS_ID";
			Session["StrSql"]=StrSql;
		 Response.Redirect("Massage.aspx");
		}

		protected void Button_EnglishReading_Click(object sender, System.EventArgs e)
		{
			
			string StrSql="select * from Book_Info a,Book_Style b,Book_DetailStyle c where B_S_Name='英语读物'  and b.B_S_ID=c.B_S_ID and a.B_BDS_ID=c.B_DS_ID";
			Session["StrSql"]=StrSql;
			Response.Redirect("Massage.aspx");
		}

		protected void Button_PoliticsEconomics_Click(object sender, System.EventArgs e)
		{
			
			string StrSql="select * from Book_Info a,Book_Style b,Book_DetailStyle c where B_S_Name='政治经济'  and b.B_S_ID=c.B_S_ID and a.B_BDS_ID=c.B_DS_ID";
			Session["StrSql"]=StrSql;
			Response.Redirect("Massage.aspx");
		}

		protected void Button_PhilosophyReligion_Click(object sender, System.EventArgs e)
		{
			
			string StrSql="select * from Book_Info a,Book_Style b,Book_DetailStyle c where B_S_Name='哲学宗教'  and b.B_S_ID=c.B_S_ID and a.B_BDS_ID=c.B_DS_ID";
			Session["StrSql"]=StrSql;
			Response.Redirect("Massage.aspx");
		}

		protected void Button_ForiegnLiterature_Click(object sender, System.EventArgs e)
		{
			
			string StrSql="select * from Book_Info a,Book_Style b,Book_DetailStyle c where B_S_Name='外国文学'  and b.B_S_ID=c.B_S_ID and a.B_BDS_ID=c.B_DS_ID";
			Session["StrSql"]=StrSql;
			Response.Redirect("Massage.aspx");
		}

		protected void Button_Poetry_Click(object sender, System.EventArgs e)
		{
			
			
			string StrSql="select * from Book_Info a,Book_Style b,Book_DetailStyle c where B_S_Name='诗歌'  and b.B_S_ID=c.B_S_ID and a.B_BDS_ID=c.B_DS_ID";
			Session["StrSql"]=StrSql;
			Response.Redirect("Massage.aspx");
		}

		protected void Button_Novel_Click(object sender, System.EventArgs e)
		{
			
			string StrSql="select * from Book_Info a,Book_Style b,Book_DetailStyle c where B_S_Name='小说'  and b.B_S_ID=c.B_S_ID and a.B_BDS_ID=c.B_DS_ID";
			Session["StrSql"]=StrSql;
			Response.Redirect("Massage.aspx");
		}

		protected void Button_MathPhysicsChemistry_Click(object sender, System.EventArgs e)
		{
			
			string StrSql="select * from Book_Info a,Book_Style b,Book_DetailStyle c where B_S_Name='数理化'  and b.B_S_ID=c.B_S_ID and a.B_BDS_ID=c.B_DS_ID";
			Session["StrSql"]=StrSql;
			Response.Redirect("Massage.aspx");
		}

		

		protected void LinkButton1_Click(object sender, System.EventArgs e)
		{

            if (Session["T_Status"].ToString() == "1" || Session["T_Status"].ToString() == "2")
				Response.Redirect("TanancyMassage.aspx");
			else
				Response.Write("<Script Language='JavaScript'>alert('你还没有预定图书')</Script>");
		}

		protected void LinkButton2_Click(object sender, System.EventArgs e)
		{
			if(Session["T_Status"].ToString()=="2")
				Response.Redirect("TanancyMassage.aspx");
			else
				Response.Write("<Script Language='JavaScript'>alert('你还没有租赁图书')</Script>");
		}

		protected void LinkButton3_Click(object sender, System.EventArgs e)
		{
			if(Session["T_Status"].ToString()=="2")
				Response.Redirect("TanancyMassage.aspx");
			else
				Response.Write("<Script Language='JavaScript'>alert('你还没有租赁图书')</Script>");	
		}

		protected void LinkButton4_Click(object sender, System.EventArgs e)
		{
			if(Session["T_Status"].ToString()=="2")
				Response.Redirect("TanancyMassage.aspx");
			else
				Response.Write("<Script Language='JavaScript'>alert('你还没有租赁图书')</Script>");
		}
	}
}