쿠키 사용

public void CookieWrite(string key, string value)
{
    if (String.IsNullOrEmpty(value) == true)
    {
        this.CookieDelete(key);
        return;
    }
 
    HttpCookie c = Request.Cookies["UserSettings"];
    if (c == null) c = new HttpCookie("UserSettings");
    c.Values[key] = value;
    c.Expires = DateTime.Now.AddMonths(1);
    c.Path = "/";
    Response.Cookies.Add(c);
}
 
public void CookieDelete(string key)
{
    HttpCookie c = Request.Cookies["UserSettings"];
    c.Values.Remove(key);
    c.Expires = DateTime.Now.AddMonths(1);
    c.Path = "/";
    Response.Cookies.Add(c);
}
 
public string CookieRead(string key)
{
    HttpCookie c = this.Request.Cookies["UserSettings"];
    if (c == null) return null;
    return c[key];
}