pswmod.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.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 System.Data.SqlClient;
using DBase;

namespace Library
{
	/// <summary>
	/// ReaderInfo 的摘要说明。
	/// </summary>
	public class PswMod: System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Panel Panel2;
		protected System.Web.UI.WebControls.LinkButton LinkBookBorrow;
		protected System.Web.UI.WebControls.LinkButton LinkBorrowHistory;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.HyperLink HyperLink1;
		protected System.Web.UI.WebControls.LinkButton LinkReaderInfo;
		protected System.Web.UI.WebControls.Label lblMessage;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.TextBox tbNew;
		protected System.Web.UI.WebControls.TextBox tbAgain;
		protected System.Web.UI.WebControls.Label Label3;
		protected System.Web.UI.WebControls.TextBox tbOld;
		protected System.Web.UI.WebControls.Label Label4;
		protected System.Web.UI.WebControls.Button btMod;
		protected System.Web.UI.WebControls.CompareValidator CompareValidator1;
		protected System.Web.UI.WebControls.LinkButton LinkSignOut;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;

		static string id;
		private void Page_Load(object sender, System.EventArgs e)
		{
			id= Request.QueryString["id"];
			Response.Buffer=true;
			Response.ExpiresAbsolute=DateTime.Now.AddSeconds(-1);
			Response.Expires=0;
			Response.CacheControl="no-cache";
		}

		#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.btMod.Click += new System.EventHandler(this.btMod_Click);
			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 btMod_Click(object sender, System.EventArgs e)
		{
			if(IsValid && check())
			{
				if(DB.cn.State == ConnectionState.Closed)
					DB.cn.Open();

				string str = "update  Reader set Password='" + this.tbAgain.Text.Trim() + "'where ReaderID='" + id + "'";
				SqlCommand com = new SqlCommand(str,DB.cn);
				
				try
				{
					com.ExecuteNonQuery();
					lblMessage.Text = "密码修改成功！";
					this.tbAgain.Text ="";
					this.tbNew .Text ="";
					this.tbOld .Text ="";
					DB.cn.Close();
					return;
				}
				catch
				{
					lblMessage.Text = "数据更新失败！";
					return;
				}
			}
		}

		bool check()
		{
			bool f = false;
			int n=0;
			if(DB.cn.State == ConnectionState.Closed)
				DB.cn.Open();
			string str = "select count(*) from  Reader where ReaderID='" + id + "' and Password='" + this.tbOld.Text.Trim() +"'";
			SqlCommand com = new SqlCommand(str,DB.cn);
			try
			{
				n=(int)com.ExecuteScalar();
				if(n==1)
				{
					f= true;
				}
				else
					lblMessage.Text = "请确认您的密码输入是否正确！";
				DB.cn.Close();
			}
			catch
			{
				lblMessage.Text = "请确认您的密码输入是否正确！";
				f= false;
			}
			return f;
		}

	}
}