I was looking to set and retrieve cookies with Silverlight 2.0 and came across the following article by Nikola. Unfortunately, it did not work out of the box for me, so I modified it. Here is my updated version:
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Browser;
/* www.datawinconsulting.com */
namespace Datawin
{
/*
Thanks to Nikola - http://blogs.msdn.com/nikola
http://blogs.msdn.com/nikola/archive/2008/04/14/setting-cookies-through- silverlight.aspx
*/
public class Cookie
{
///
/// sets a persistent cookie with huge expiration date
///
/// the cookie key
/// the cookie value
public static void SetCookie(string key, string value)
{
string oldCookie = HtmlPage.Document.GetProperty("cookie") as String;
DateTime expiration = DateTime.UtcNow + TimeSpan.FromDays(2000);
string cookie = String.Format("{0}={1};expires={2}", key, value, expiration.ToString("R"));
HtmlPage.Document.SetProperty("cookie", cookie);
}
///
/// Retrieves an existing cookie
///
/// cookie key
/// null if the cookie does not exist, otherwise the cookie value
public static string GetCookie(string key)
{
string[] cookies = HtmlPage.Document.Cookies.Split(';');
key += '=';
foreach (string cookie in cookies)
{
string cookieStr = cookie.Trim();
if (cookieStr.StartsWith(key, StringComparison.OrdinalIgnoreCase))
{
string[] vals = cookieStr.Split('=');
if (vals.Length >= 2)
{
return vals[1];
}
return string.Empty;
}
}
return null;
}
///
/// Deletes a specified cookie by setting its value to empty and expiration to -1 days
///
/// the cookie key to delete
public static void DeleteCookie(string key)
{
string oldCookie = HtmlPage.Document.GetProperty("cookie") as String;
DateTime expiration = DateTime.UtcNow - TimeSpan.FromDays(1);
string cookie = String.Format("{0}=;expires={1}", key, expiration.ToString("R"));
HtmlPage.Document.SetProperty("cookie", cookie);
}
}
}
Here is how I call the Cookie Code:
private void SetCookie_Click(object sender, RoutedEventArgs e)
{
Datawin.Cookie.SetCookie("FoodName", txtBox1.Text);
}
private void GetCookie_Click(object sender, RoutedEventArgs e)
{
txtBox2.Text = Datawin.Cookie.GetCookie("FoodName");
}
Hope that helps some of you out there. It sure helps me.
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