谁能帮我看一下cookie的设置，哪里出了问题？

Question

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (TextBox1.Text != "")
        {
            HttpCookie makecookie = new HttpCookie("Cookie");
            makecookie.Value = this.TextBox1.Text;
            Response.Cookies.Add(makecookie);
            Response.Write("<script>写入cookie成功</script>");
        }
        else
        {
            Response.Write("<script>请先写入cookie</script>");
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        if (TextBox1.Text != "")
        {
            HttpCookie readcookie = Request.Cookies["Cookie"];
            this.TextBox2.Text = readcookie.Value;
        }
        else
        {
            Response.Write("<script>请先写入cookie</script>");
        }
    }
    protected void Button3_Click(object sender, EventArgs e)
    {
        if (TextBox1.Text != "")
        {
            string strPwd = this.TextBox1.Text;
            Response.Cookies["strPwd"].Value = FormsAuthentication.HashPasswordForStoringInConfigFile(strPwd, "md5");
            TextBox3.Text = "加密后的Cookes的值为：" + Response.Cookies["cookie"].Value.ToString();
        }
        else
        {
            Response.Write("<script>请先写入cookie</script>");
        }
    }
    protected void Button4_Click(object sender, EventArgs e)
    {
        HttpCookie makecookie = new HttpCookie("Cookie");
        makecookie.Value = this.TextBox1.Text;
        Label1.Text = "指定cookie的有效时间：" + makecookie.Expires.ToString() + "<br>" + "指定cookie的名称为：" + makecookie.Name + "指定cookie的值为：" + makecookie.Value +
            "指定cookie的路径为：" + makecookie.Path;
    }
}

Answer 1

提示什么错误？＝＝＝＝＝
设置cookie生命周期
 HttpCookie makecookie = new HttpCookie("Cookie");
  makecookie.Value = this.TextBox1.Text;
makecookie.Expires =  DateTime.Now.AddHours(1); 
  Response.Cookies.Add(makecookie);
http://topic.csdn.net/u/20090525/21/76a687af-bcb4-45fa-a1cc-69408e6a10e4.html

Answer 2

这是我在网上找到的例子，LZ参考一下
    protected void Page_Load(object sender, EventArgs e)
    {
        this.DropDownList4.Items.Add("不保存");
        this.DropDownList4.Items.Add("保存一天");
        this.DropDownList4.Items.Add("保存一月");
        this.DropDownList4.Items.Add("保存一年");
        //显示保存的Cookies//
        if (Request.Cookies["username"] != null && Request.Cookies["username"].ToString() != "")
        {
            Label1.Text = Request.Cookies["username"].Value;
            Label2.Text = Request.Cookies["pwd"].Value;
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        //开始记录Cookies//
        if (this.DropDownList4.SelectedValue.ToString() == "不保存")
        {
            //无动作
        }
        if (this.DropDownList4.SelectedValue.ToString() == "保存一天")
        {
            this.Response.Cookies["username"].Expires = DateTime.Now.AddDays(1);
            this.Response.Cookies["pwd"].Expires = DateTime.Now.AddDays(1);
        }
        if (this.DropDownList4.SelectedValue.ToString() == "保存一月")
        {
            this.Response.Cookies["username"].Expires = DateTime.Now.AddMonths(1);
            this.Response.Cookies["pwd"].Expires = DateTime.Now.AddMonths(1);
        }
        if (this.DropDownList4.SelectedValue.ToString() == "保存一年")
        {
            this.Response.Cookies["username"].Expires = DateTime.Now.AddYears(1);
            this.Response.Cookies["pwd"].Expires = DateTime.Now.AddYears(1);
        }
        this.Response.Cookies["username"].Value = this.TextBox2.Text.ToString();
        this.Response.Cookies["pwd"].Value = this.TextBox1.Text.ToString();
        //结束记录Cookies//
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        if (HttpContext.Current.Request.Cookies["username"] != null && HttpContext.Current.Request.Cookies["pwd"] != null)
        {
            HttpCookie UserCookie = Request.Cookies["username"];
            HttpCookie UserCookie2 = Request.Cookies["pwd"];
            UserCookie.Expires = DateTime.Now.AddDays(-1);
            UserCookie2.Expires = DateTime.Now.AddDays(-1);
            HttpContext.Current.Response.Cookies.Add(UserCookie);
            HttpContext.Current.Response.Cookies.Add(UserCookie2);
        }        Response.Redirect("Default.aspx");
    }

Answer 3

System.Web.HttpCookie newcookie = new HttpCookie("user");
newcookie.Values["username"] = "";
newcookie.Values["password"] = "";
newcookie.Expires = DateTime.Now.AddDays(15);
Response.AppendCookie(newcookie);
System.Web.HttpCookie cookie = Request.Cookies["user"];
if (cookie != null)
{
cookie.Expires = DateTime.Now.AddDays(-1);
Response.Cookies.Set(cookie);
}HttpCookie cookie = System.Web.HttpContext.Current.Request.Cookies[cookiename];  
if (cookie != null)  
{  
cookie.Values.Clear();  
SetUserCookieExpireTime(cookiename, -1);  
cookie.Domain = _domain;  
System.Web.HttpContext.Current.Response.Cookies.Set(cookie);  
}  
public static void SetUserCookieExpireTime(string key, int days)  
{  
System.Web.HttpContext.Current.Response.Cookies[key].Domain = _domain;  
System.Web.HttpContext.Current.Response.Cookies[key].Path = _cookiepath;  
System.Web.HttpContext.Current.Response.Cookies[key].Expires = DateTime.Now.AddDays(days);  
}  

Answer 4

 System.Web.HttpCookie newcookie = new HttpCookie("Users");
            newcookie.Values["UserName"] = name;
            newcookie.Values["PassWord"] = pass;
            newcookie.Expires = DateTime.Now.AddDays(30);
            HttpContext.Current.Response.AppendCookie(newcookie);