在winfrom中如何操作cookie

[lshfong]

HttpCookie cookie = new HttpCookie("ReportCookie");
cookie.Values["a"] = "中华人民共和国";
cookie.Values["b"] = "大家好";
DateTime dtNow = DateTime.Now;
TimeSpan tsMinute = new TimeSpan(0, 1, 0, 0);
cookie.Expires = dtNow + tsMinute;
HttpContext.Current.Response.AppendCookie(cookie);
我在程序中这样写的，运行后出现错误，提示“未将对象引用设置到对象的实例。”
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请高人指点一下啊!

[没有访问权限]

Winform里有必要用过COOKIE吗？直接用实体类就能解决问题啦

[wefgod]

    protected void Page_Load(object sender, EventArgs e)
    {
        StringBuilder sb = new StringBuilder();
        // Get cookie from the current request.
        HttpCookie cookie = Request.Cookies.Get("DateCookieExample");
        
        // Check if cookie exists in the current request.
        if (cookie == null)
        {
            sb.Append("Cookie was not received from the client. ");
            sb.Append("Creating cookie to add to the response. <br/>");
            // Create cookie.
            cookie = new HttpCookie("DateCookieExample");
            // Set value of cookie to current date time.
            cookie.Value = DateTime.Now.ToString();
            // Set cookie to expire in 10 minutes.
            cookie.Expires = DateTime.Now.AddMinutes(10d);
            // Insert the cookie in the current HttpResponse.
            Response.Cookies.Add(cookie);
        }
        else
        {
            sb.Append("Cookie retrieved from client. <br/>");
            sb.Append("Cookie Name: " + cookie.Name + "<br/>");
            sb.Append("Cookie Value: " + cookie.Value + "<br/>");
            sb.Append("Cookie Expiration Date: " + 
                cookie.Expires.ToString() + "<br/>");
        }
        Label1.Text = sb.ToString();
    }

http://msdn.microsoft.com/zh-cn/library/system.web.httpcookie(VS.80).aspx
可以参考下

[wefgod]

[Quote=引用 1 楼 yangheation 的回复:]
Winform里有必要用过COOKIE吗？直接用实体类就能解决问题啦
[/Quote]他是不是想自己写浏览器？

[lshfong]

我是一个c/s结构的程序，要和服务器进行交互