Login.aspx.cs

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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.Data.SqlClient;

namespace GradeMis
{
	/// <summary>
	/// Login 的摘要说明。
	/// </summary>
	public class Login : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.TextBox txtPassword;
		protected System.Web.UI.WebControls.TextBox txtUsername;
		private SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["GradeSys"]);
		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 userlogin
		private void userLogin()
		{
            string user = this.txtUsername.Text.ToString();//名字
            string ACT = "login";//行为
            string result = "";//结果
            string Kind = "student";//账户类型
            string sql = string.Empty;
            string error = "";
            string pwd = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(this.txtPassword.Text,"MD5");
			sql = string.Format("select username,password,[group] from Admin where username='{0}' and password='{1}'",user,pwd);
			SqlDataReader dr;
			SqlCommand cmd = new SqlCommand(sql,conn);
			try
			{
				conn.Open();
				dr = cmd.ExecuteReader();
				if(dr.Read())
				{
                    result = "1";
					Session["username"] = dr["username"].ToString();
					Session["group"] = dr["group"].ToString();
                    Kind = dr["group"].ToString();
					Response.Redirect("Main.aspx");
                    conn.Close();
                    OPDB.operate.login(user, ACT, result, Kind, ref error);
				}
				else
				{
					Response.Write("<script>alert('用户名或者密码错误,请重新输入!')</script>");
                    conn.Close();