How to store user name in cookie ? RSS

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  sonika

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  7 Posts

  How to store user name in cookie ?

  Oct 20, 2005 04:04 PM|LINK

  I want to store the login name in the login page in a cookie (when the user clicks the remember id checkbox )so that the next time he opens the login page his name should appear in the login name box.
  Can anyone give me the code for this?
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  response.coo...

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  80 Posts

  Re: How to store user name in cookie ?

  Oct 20, 2005 08:39 PM|LINK

  You could do something like this:
  
  if(mycheckbox.Checked)
  {
  Response.Cookies["cookiename"].Value = this.mytextbox.Text;
  Response.Cookies["cookiename"].Expires = DateTime.Now.AddDays(2);
  }
  
  
  Then later if you want to retreive the cookie value:
  
  string mystring = Request.Cookies["cookiename"].Value.ToString();
  
  Hope this helps,
  
  LW
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  Kumar Reddi

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  2619 Posts

  Re: How to store user name in cookie ?

  Oct 20, 2005 09:10 PM|LINK

  Response.Cookies.Add(MyCookie);
  
  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemWebHttpResponseClassCookiesTopic.asp
  Kumar Reddi
  
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  sonika

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  35 Points

  7 Posts

  Re: How to store user name in cookie ?

  Oct 20, 2005 09:28 PM|LINK

  I am trying to add a cookie by using this code :
  

  ckusername = New HttpCookie("UserName", txtusername.Text)

  Response.Cookies.Add(ckusername)

  Response.Cookies("ckusername").Expires = DateTime.Now.AddDays(20)

  Response.Write(Request.Cookies("UserName").Value)
  
  This returns the user name in the response.write
  
  but when i try to retrieve the value stored in the cookie on the page load function in the user name text box by the code :
  txtusername.Text = Request.Cookies("UserName").Value.ToString
  it's throwing error.
  
  

  Object reference not set to an instance of an object.

  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
  
  Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
  
  Source Error:
  
  

  Line 56: 'If Not (Request.Cookies("UserName") Is Nothing) Then Line 57: 'txtusername.Text = Response.Cookies.Get("USER_NAME").Value Line 58: txtusername.Text = Request.Cookies("UserName").Value.ToString Line 59: 'If (Request.Cookies("Name") Is Nothing) Then Line 60: ' txtusername.Text = Request.Cookies("Name").Value

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  sonika

  Member

  35 Points

  7 Posts

  Re: How to store user name in cookie ?

  Oct 20, 2005 10:32 PM|LINK

  I am getting this error when i am trying to retrive the value of the cookie:

  Server Error in '/ParamountCRS' Application.

  ---

  Object reference not set to an instance of an object.

  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
  
  Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
  
  Source Error:
  
  

  Line 52: Dim Tempcookie As HttpCookie Line 53: Tempcookie = Response.Cookies.Get("ckusername") Line 54: txtusername.Text = Tempcookie.Values("UserName").ToString Line 55: 'Response.Write(ckusername.Name) Line 56: 'Request.Cookies.Get("sonika")

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  Kumar Reddi

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  2619 Posts

  Re: How to store user name in cookie ?

  Oct 21, 2005 01:17 AM|LINK

  Make sure the cookie exists before you try to retrieve. Your code is failing because the cookie does not exist in the Page_Load of the login page.. Try doing the following
  
  Page_Load(..)
  {
     if(Request.Cookies["UserName"] != null)
     {
        txtUserName.Text = Request.Cookies["UserName"].Value;
      }
     else
     {
         HttpCookie MyCookie = new HttpCookie("UserName", txtusername.Text);
        DateTime now = DateTime.Now;
     
        MyCookie.Value = now.ToString();
        MyCookie.Expires = now.AddHours(1);
  
        Response.Cookies.Add(MyCookie);
     }
  }
  
  This would set the cookie the first time the user logsin.. So from next time on the cookie is read from the browser
  
  P.S: The above code is untested and c# version..

  Kumar Reddi
  
  • Edited by Kumar Reddi on Oct 21, 2005 01:17 AM