login.ascx.cs

会议室管理系统,本系统是我大学毕业时候的毕业设计,一次通过的!

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;
public partial class Control_login : System.Web.UI.UserControl
{

    protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection cn = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["cn"]);
        cn.Open();
        SqlCommand cmd = new SqlCommand("select*from userinfo where username='" + this.txtusername.Text.ToString().Trim() + "' and pwd='" + this.txtpwd.Text.ToString().Trim() + "'and role='" + this.ddlrole.SelectedItem.Value.ToString() + "'", cn);
        SqlDataReader dr;
        dr = cmd.ExecuteReader();
        if (dr.Read())
        {
            Session["id"] = dr["id"];
            Session["username"] = dr["username"].ToString();
            Session["role"] = dr["role"].ToString();
            Session["pwd"] = dr["pwd"].ToString();
            Session["entertime"] = dr["entertime"].ToString();
            Session["loginouttime"] = dr["loginouttime"].ToString();
            Session["loginnum"] = dr["loginnum"].ToString();
            dr.Close();
            SqlCommand cmd1 = new SqlCommand("update userinfo set logintime=getdate(),loginnum=loginnum+1,attr='在线' where id=" + Convert.ToInt32(Session["id"]), cn);
            cmd1.ExecuteNonQuery();

            cn.Close();
            System.Web.Security.FormsAuthentication.RedirectFromLoginPage(this.txtusername.Text, false);
            Response.Redirect("Default.aspx");
        }
        else
        {
            this.Labmessage.Text = "用户名或密码错误";
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        this.txtpwd.Text = "";
        this.txtusername.Text = "";
        this.txtusername.Focus();
        this.Labmessage.Text = "";
    }
}