Login page

//***********//

aspx.cs file

//***********//

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Text;
public partial class Login
{
 
  StringBuilder onLoadMethods = new StringBuilder(150);
  StringBuilder sb = new StringBuilder(150);
  string userName;
  void Page_PreRender(object sender, EventArgs e)
  {
  sb.Append(" \n");
  Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "onLoadMsg", sb.ToString());
  }

  protected void Page_Load(object sender, EventArgs e)
  {
  if (Request.Cookies["myCookie"] != null)
  {
  HttpCookie cookie = Request.Cookies.Get("myCookie");
  txtLogin.Attributes.Add("value", cookie.Values["userName"].ToString());
  if (Convert.ToBoolean(cookie.Values["Remember"]))
  RememberMe.Checked = true;
  }

  if (!IsPostBack)
  {
  txtLogin.Attributes.Add("onKeyPress", "doClick('" + lbLogin.ClientID + "',event)");
  txtPassword.Attributes.Add("onKeyPress", "doClick('" + lbLogin.ClientID + "',event)");
  }
  }

  protected void lbLogin_Click(object sender, EventArgs e)
  {
  if (CheckLoginAndPassword(txtLogin.Text.Trim(), txtPassword.Text.Trim()))
  {
  if (!string.IsNullOrEmpty(userName))
  {
  if (RememberMe.Checked)
  {
  HttpCookie myCookie = new HttpCookie("myCookie");
  Response.Cookies.Remove("myCookie");
  Response.Cookies.Add(myCookie);
  myCookie.Values.Add("userName", userName);
  myCookie.Values.Add("Remember", RememberMe.Checked.ToString());
  DateTime dtExpiry = DateTime.Now.AddDays(15); //you can add years and months too here
  Response.Cookies["myCookie"].Expires = dtExpiry;

  }
  else
  {
  DateTime dtExpiry = DateTime.Now.AddDays(-1); //you can add years and months too here
  Response.Cookies["myCookie"].Expires = dtExpiry;
  }

 
  FormsAuthentication.RedirectFromLoginPage(userName, false);
  if (string.IsNullOrEmpty(Request.QueryString["ReturnUrl"]))
  Response.Redirect("Home.aspx");
  else
  Response.Redirect(Request.QueryString["ReturnUrl"].ToString());
  }
  }
  else
  {
  onLoadMethods.Append("alert('Your login attempt was not successful. Please try again.');");
  }
  }
  public bool CheckLoginAndPassword(string username, string password)
  {
  bool authenticate = false;
  if (username.Contains("@")) //Email Login
  {
  string usern = Membership.GetUserNameByEmail(username);
  if (!string.IsNullOrEmpty(usern))
  {
  if (Membership.ValidateUser(usern, password))
  {
  userName = usern;
  authenticate = true;
  }
  else authenticate = false;
  }
  }
  else //Standard Username & Password Login
  {
  userName = username;
  if (Membership.ValidateUser(username, password))
  authenticate = true;
  else
  authenticate = false;
  }
  return authenticate;
  }
}

//***********//

aspx file

//***********//

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %>





   


   

  

       

       

       

           

               

                   

                       

                            LOGIN
                       

                       

                             
                       

                       

                           
                                Email or Login Id:
                           
                               
                           
                           

                                                                    ErrorMessage="Required Email or Login Id." ToolTip="Required Email or Login Id.."
                                    ValidationGroup="Login" Display="None">
                               
                           

                       

                       

                           
                                Password:
                           
                               
                           

                                                                    ErrorMessage="Required Password." ToolTip="Required Password." ValidationGroup="Login"
                                    Display="None">
                               
                           

                       

                       

                             
                       

                       

                           
                           
                           
                               
                           
                           

                           

                       

                       

                             
                       

                       

                            Forgot Your Password?
                           

                           

                       

                       

                             
                       

                       

                           
                           

                                                                    ShowSummary="false" runat="server" EnableViewState="false" />
                           

                       

                   

               

               
           

       
       

      
   

   

for thar write peocedure like
create proc SP_User(@username varchar(50),@password varchar(50))
as
begin
select * from [tblname] where username=@username and password=@password
end

Hi Manuel,


It is a web or windows app.


If windows

Try this...

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace Login_Form_in_Csharp_Using_ProgressBar
{
    public partial class Form1 : Form
    {
        string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["dsn"];
        OleDbCommand com;
        OleDbDataAdapter oledbda;
        DataSet ds;
        string str;
        public Form1()
        {
            InitializeComponent();
        }

        private void btnlogin_Click(object sender, EventArgs e)
        {
            if (txtusername.Text == "" || txtpassword.Text == "")
            {
                MessageBox.Show("Please enter User ID or Password");
                txtusername.Text = "";
                txtpassword.Text = "";

            }
            else
            {
                OleDbConnection con = new OleDbConnection(ConnectionString);
                con.Open();
                str = "select count(*) from login where userid='" + txtusername.Text.Trim() + "' and password='" + txtpassword.Text.Trim() + "'";
                com = new OleDbCommand(str, con);
                oledbda = new OleDbDataAdapter(com);
                ds = new DataSet();
                oledbda.Fill(ds, "login");
                long x;
                x = Convert.ToInt64(com.ExecuteScalar());
                if (x == 1)
                {
                    int y = 0;
                    progressBar1.Visible = true;
                    progressBar1.Minimum = 1;
                    progressBar1.Maximum = 100000;
                    progressBar1.Value = 1;
                    progressBar1.Step = 1;
                    for (y = 1; y <= 100000; y++)
                    {
                        progressBar1.PerformStep();
                    }
                    Form2 f1 = new Form2();
                    f1.Show();
                    this.Hide();
                }
                else
                {
                    MessageBox.Show("Invalid User ID or Password! Try Again!");
                    txtusername.Text = "";
                    txtpassword.Text = "";
                }
                con.Close();
            }
           
        }
    }
}





If web...

http://www.c-sharpcorner.com/uploadfile/abhikumarvatsa/simple-login-project-in-Asp-Net/default.aspx


Thanks