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;

public partial class login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string error_measage;
        try
        {
            error_measage = Request.QueryString.Get(0).ToString();
            error_label.Visible = true;
            error_label.Text = error_measage;
        }
        catch
        {
            error_label.Visible = false;
        }
    }
    protected void submit_Click(object sender, EventArgs e)
    {
        //if (Session["CheckCode"] == CheckCode.Text.ToString())
       // {
            UserInfo user = new UserInfo();
            user.user_name = user_name.Text.ToString();
            user.password = password.Text.ToString();
            if (user.CheckLogin())
            {
                dataconn getuserLevel = new dataconn();
                try
                {
                    Session["user_level"] = getuserLevel.Get_level(user_name.Text.ToString());
                }
                catch
                {
                    Response.Redirect("register.aspx");
                }
                Session["user_name"] = user_name.Text.ToString();
                error_label.Visible = true;
                error_label.Text = Session["user_level"].ToString();
                if (Session["user_level"].ToString().Equals("1"))
                {
                    Response.Redirect("user_mg.aspx?");
                }
                else if (Session["user_level"].ToString().Equals("2"))
                {
                    Response.Redirect("admin_mg.aspx");
                }
                else
                {
                    Response.Redirect("register.aspx");
                }