adminpwd.aspx.cs

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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;

//该源码下载自www.51aspx.com(５１ａｓｐｘ．ｃｏｍ)
namespace examonline
{
	/// <summary>
	/// adminpwd 的摘要说明。
	/// </summary>
	public partial class adminpwd : System.Web.UI.Page
	{
	
		protected void Page_Load(object sender, System.EventArgs e)
		{
			if((bool)Session["IsLogined"]==false)
			{
				Response.Redirect("index.aspx");
			}
			lblmsg.Text=(string)Session["info"];
			Session["info"]="";
		}

		#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 btnlogin_Click(object sender, System.EventArgs e)
		{
			string oldpwd = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(txtOldpwd.Text, "MD5");
			string newpwd = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(txtNewpwd.Text, "MD5");
			string repwd = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(txtRepwd.Text, "MD5");
			if(newpwd!=repwd)
			{
				Session["info"]="密码确认有误！";
				Response.Redirect("adminpwd.aspx");
				Response.End();
			}
			string sql = "update [admin] set password='"+newpwd+"' where username='" + txtid.Text.Trim() + "' and password='" + oldpwd + "'";
			SqlConnection cn = new SqlConnection("server=(local);uid=sa;pwd=51aspx;database=examonline");
			SqlCommand cmd = new SqlCommand(sql, cn);
			try
			{
				cn.Open();
				int h = cmd.ExecuteNonQuery();
				if(h>0)
				{
					lblmsg.Text="修改成功！";

				}
				else
				{
					Session["info"] = "用户名或密码错误！";
					Response.Redirect("adminpwd.aspx");
					Response.End();
				}
			}
			catch(SqlException ex)
			{
				Session["info"] = "数据库错误：" + ex.Message.ToString();
				Response.Redirect("adminpwd.aspx");
				Response.End();
			}
			finally
			{
				cn.Close();
			}
		}
	}
}