ASP.NET操作Cookie

public static void SetDataByCookie(string mainKey, string subKey, string value, string domain, int expireHours)
{
    var cookie = Request.Cookies[mainKey];
    if (cookie == null)
    {
        cookie = new HttpCookie(mainKey);
    }

    if (!String.IsNullOrEmpty(domain))
    {
        cookie.Domain = domain;
    }
    cookie.Expires = DateTime.Now.AddHours(expireHours);
    cookie[subKey] = value;
    Response.Headers.Add("Access-Control-Allow-Credentials", "true");

    Response.SetCookie(cookie);
}

public static string GetDataByCookie(string mainKey, string subKey)
{
    if (Request.Cookies[mainKey] != null && Request.Cookies[mainKey][subKey] != null)
    {
        return Request.Cookies[mainKey][subKey];
    }
    return "";
}