goonborrow.aspx.cs

图书馆的书目查询

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 Library_BS.Components
{
	/// <summary>
	/// GoonBorrow 的摘要说明。
	/// </summary>
	public class GoonBorrow : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.TextBox txtBookID;
		protected System.Web.UI.WebControls.Button Button1;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
		}

		#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()
		{    
			this.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{
			//BorrowBookDB borrow = new BorrowBookDB();
			GoonBorrowDB Goon = new GoonBorrowDB();
			FineDB fine = new FineDB();
			
			int bookId = int.Parse(this.txtBookID.Text);
			string ReaderId = Goon.GetReaderIdByBook(bookId); 
			int CanGoonBorrowDay = Goon.GetMaxGoonBorrowDay(ReaderId);
			System.DateTime day = fine.GetRuturnDate(bookId).AddDays(CanGoonBorrowDay);
		
		
			//该读者有超期图书，且该图书未还
			if(Goon.GetDateFlag(ReaderId)>0)
			{
				Response.Write("您有书过期,请先归还!");
			}
			else
			{
				if(Goon.GetSumFine(ReaderId) > 0)//有欠款
				{
					Response.Write("您有欠款，请先付款再借书！");
				}
				else
				{
					if(Goon.GetGoonBorrowTimeByBook(bookId) != 0)//已经被续借过
					{
						Response.Write("该书已经被续借过，不可再续借！");
					}
					else
					{
						int rowsAffected = Goon.UpdateGoonBorrow(bookId, "未还", day, 1);
						Response.Write("按书续借操作成功！");
					}
				}
			}
		}
	}
}