Blank page for wp-admin after i uploaded the website from my localhost to the live server

Try this in your functions.php file:

//fix for cookie error while login.
setcookie(TEST_COOKIE, 'WP Cookie check', 0, COOKIEPATH, COOKIE_DOMAIN); 
if ( SITECOOKIEPATH != COOKIEPATH )     
    setcookie(TEST_COOKIE, 'WP Cookie check', 0, SITECOOKIEPATH, COOKIE_DOMAIN);