Login Page With
Remember Password Code In ASP. Net 4.0
In This article I am going to explain how to implement Remember
Me checkbox functionality and simple login page code in asp. net. Remember me
checkbox will maintain username and password for user when user visits next
time.
To create the simple login
page with remember password do the following.
First of all open a web site
in ASP.Net and add some simple ASP.Net code within the default.aspx page. For
example I must insert two TextBoxes, one for the userid and another for the
password and one checkbox control that allows the user to specify whether he
wants the page to remember the username and password when he visits the next
time and one login button.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
Userid:
<asp:TextBox ID ="textbox1" runat ="server" ></asp:TextBox><br />
Password:
<asp:TextBox ID ="textbox2" runat ="server" TextMode ="Password" ></asp:TextBox><br />
<asp:CheckBox ID ="rememberme" runat="server" Text ="remember Password" /><br />
<asp:Button ID ="Login" runat ="server" Text ="Login" onclick="Login_Click" />
</form>
</body>
Save
Userid and Password in cookie
Now the login button is
clicked where I have login page code that stores the userid and password in a
cookie. To do that, first dtermine if the remember me checkbox is checked. If
it is checked then store the username and password into the cookie for the next
15 days from the current date. And if not checked then set the expiration date
to 1 day in the future to destroy the cookie.
Login
button click code.
protected void Login_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("Data
Source=MCNDESKTOP08;Initial Catalog=pulkit;User ID=sa;Password=wintellect");
SqlCommand cmd = new SqlCommand("select
userid, pwd from logdetail where userid='" + textbox1.Text + "' and pwd='" + textbox2.Text + "'", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill (ds );
if (ds.Tables[0].Rows.Count > 0)
{
if (rememberme.Checked == true)
{
Response.Cookies["userid"].Value = textbox1.Text;
Response.Cookies["pwd"].Value = textbox2.Text;
Response.Cookies["userid"].Expires = DateTime.Now.AddDays(15);
Response.Cookies["pwd"].Expires = DateTime.Now.AddDays(15);
}
if (ds.Tables[0].Rows.Count > 0)
{
if (rememberme.Checked == true)
{
Response.Cookies["userid"].Value = textbox1.Text;
Response.Cookies["pwd"].Value = textbox2.Text;
Response.Cookies["userid"].Expires = DateTime.Now.AddDays(15);
Response.Cookies["pwd"].Expires = DateTime.Now.AddDays(15);
}
else
{
Response.Cookies["userid"].Expires = DateTime.Now.AddDays(-1);
Response.Cookies["pwd"].Expires = DateTime.Now.AddDays(-1);
}
Response.Redirect("user.aspx");
}
else
{
Response.Write("invalid
username and password");
}
}
Now
Fetch the Userid and Password from the Cookie and Set it in Textboxes.
In this step I will check if the Cookie
exists. Then I will load the Userid and Password into each respective TextBox
in the page_Load event.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
if (Request.Cookies["userid"] != null)
textbox1.Text = Request.Cookies["userid"].Value;
if (Request.Cookies["pwd"] != null)
textbox2.Attributes .Add ("value", Request.Cookies["pwd"].Value);
if (Request.Cookies["userid"] != null && Request.Cookies["pwd"] != null)
rememberme.Checked = true;
}
}
if (Request.Cookies["userid"] != null && Request.Cookies["pwd"] != null)
rememberme.Checked = true;
}
}
Note:
After implementing this code your password will be stored in the browser for 15
days. When you enter the email id the password will automatically appear.
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