yjfc_xinxi/login.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace yjfc_xinxi
{
    public partial class _login : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                tb_username.Focus();
            }

        }

        protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
        {
            string username = tb_username.Text.ToString().Trim();
            string userpass = tb_userpass.Text.ToString().Trim();
            if (username == "" || userpass == "")
            {
                Response.Write("<script language='javascript'>alert('请输入用户名和密码！')</script>");
                tb_userpass.Focus();
            }
            else
            {
                string sql = "select * from xinxi_users where username='" + username + "' and userpass='" + userpass + "'";
                SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["conn"].ConnectionString);
                SqlCommand cmd = new SqlCommand(sql, conn);
                conn.Open();
                SqlDataReader mydr = cmd.ExecuteReader();

                if (mydr.Read())
                {
                    Session["username"] = mydr["username"].ToString();
                    Session["userid"] = mydr["userid"].ToString();
                    Session["usertruename"] = mydr["usertruename"].ToString();
                    Session["organizeid"] = mydr["organizeid"].ToString();
                    Session["isadmin"] = mydr["isadmin"].ToString();

                 

                    mydr.Close();
                    mydr.Dispose();
                    DateTime datetime = DateTime.Now;
                    string ip = Request.UserHostAddress.ToString();
                    string sql_log = "update xinxi_users set logintime='" + datetime + "',loginip='"+ip+"' where userid='"+Session["userid"].ToString()+"'";
                    SqlCommand cmd_log = new SqlCommand(sql_log,conn);
                    cmd_log.ExecuteNonQuery();