borrowhistory.aspx.cs

代码为图书馆管理系统软件

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;
using System.Web.Security;
using DBase;

namespace Library
{
	/// <summary>
	/// ReaderInfo 的摘要说明。
	/// </summary>
	public class BorrowHistory : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Panel Panel2;
		protected System.Web.UI.WebControls.LinkButton LinkReaderInfo;
		protected System.Web.UI.WebControls.LinkButton LinkBookBorrow;
		protected System.Web.UI.WebControls.LinkButton LinkBorrowHistory;
		protected System.Web.UI.WebControls.Label lblMessage;
		protected System.Web.UI.WebControls.LinkButton LinkSignOut;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.DataGrid DataGrid1;
	
		SqlDataAdapter da;
		DataSet ds = new DataSet();
		static string id;
		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!IsPostBack)
			{
				id=Request.QueryString["id"];
				loadData(id);
			}
			Response.Buffer=true;
			Response.ExpiresAbsolute=DateTime.Now.AddSeconds(-1);
			Response.Expires=0;
			Response.CacheControl="no-cache";
		}

		void loadData(string id)
		{
			string str = "SELECT ReaderHistory.BookID,BookName,BorrowDate,ReturnDate,Penalty,Paid from Book,ReaderHistory where Book.BookID=ReaderHistory.BookID and ReaderID='"+ id +"'";
			try
			{
					if(DB.cn.State == ConnectionState.Closed)
					{
						DB.cn.Open();
					}
					da = new SqlDataAdapter(str,DB.cn);
					ds.Clear();
					da.Fill(ds,"BorrowHistory");
					BindGrid();				
					DB.cn.Close();
					this.lblMessage.Text = "";
			}
			catch(Exception ex)
			{
				this.lblMessage.Text = ex.ToString() + "数据加载失败，请重试一次！";
			}
		}

		void BindGrid()
		{
			this.DataGrid1.DataSource = ds.Tables["BorrowHistory"];
			this.DataGrid1.DataBind();
		}

		#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.LinkReaderInfo.Click += new System.EventHandler(this.LinkReaderInfo_Click);
			this.LinkBookBorrow.Click += new System.EventHandler(this.LinkBookBorrow_Click);
			this.LinkBorrowHistory.Click += new System.EventHandler(this.LinkBorrowHistory_Click);
			this.LinkSignOut.Click += new System.EventHandler(this.LinkSignOut_Click);
			this.DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.DataGrid1_PageIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void LinkReaderInfo_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("ReaderInfo.aspx");
		}

		private void LinkBookBorrow_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("BookBorrow.aspx?id=" + id);
		}

		private void LinkBorrowHistory_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("BorrowHistory.aspx?id=" + id);
		}

		private void LinkSignOut_Click(object sender, System.EventArgs e)
		{
			FormsAuthentication.SignOut();
			Response.Redirect("../logout.aspx");
		}

		private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			this.DataGrid1.CurrentPageIndex = e.NewPageIndex;
			BindGrid();
		}
	}
}