store and retrieve data in cookie

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Hi..
I have a dropdownlist in page1.I select the item that I want and click on go..It takes me to the next page(page2) and gets me the result..Again when I come back to page 1 the dropdownlist shows the default value and not the one which I selected..The same thing happens when I log out of my application and logs in..all that I wanted is dropdownlist should show the same value which I selected until and unless I close the browser.i have stored the dropdownlist in cookie..But I'm bit worried how to populate it when I log out nd login to my application or when i go some other page and come back to the page where I have given the condition..this is what I have done

HttpCookie myCookie = new HttpCookie("MyTestCookie");
DateTime now = DateTime.Now;

// Set the cookie value.
myCookie.Value = now.ToString();
// Set the cookie expiration date.
myCookie.Expires = now.AddYears(50); // For a cookie to effectively never expire

// Add the cookie.
Response.Cookies.Add(myCookie);

Response.Write("<p> The cookie has been written.");

//Read cookie

HttpCookie myCookie = new HttpCookie("MyTestCookie");
myCookie = Request.Cookies["MyTestCookie"];

// Read the cookie information and display it.
if (myCookie != null)
Response.Write("<p>"+ myCookie.Name + "<p>"+ myCookie.Value);
else
Response.Write("not found");

Posted 27-Jan-13 17:40pm

swetha890

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[no name] 27-Jan-13 23:46pm

response.redirect or server.transfer?

[no name] 27-Jan-13 23:49pm

I think u need to assign in page load event

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Ksh_Sr · Answer 1 · 2013-01-28T01:51:00

Before creating cookie you need to check whether that cookie with tat name already exits or not.Right now you are creating cookie without checking whether it is already there in client side. thats mean ur cookie value get override each time.
Put ur code like this:

XML

HttpCookie myCookie = new HttpCookie("MyTestCookie");
 myCookie = Request.Cookies["MyTestCookie"];

 // Check for cookie already present
 if (myCookie != null)
 Response.Write("Cookie is already there.");
 else
{
//create cookie

HttpCookie myCookie = new HttpCookie("MyTestCookie");
 DateTime now = DateTime.Now;
  
 // Set the cookie value.
 myCookie.Value = now.ToString();
 // Set the cookie expiration date.
 myCookie.Expires = now.AddYears(50); // For a cookie to effectively never expire
  
 // Add the cookie.
 Response.Cookies.Add(myCookie);
  
 Response.Write("The cookie has been written.");
}

Ur reading cookie code remains same as u hav written already
hope this helps u out.