Cookie 的写入与读取

private void SaveCookie(string CookieName,string CookieValue)
  {
   HttpCookie myCookie = new HttpCookie(CookieName);
   DateTime now = DateTime.Now;

   // Set the cookie value.
   myCookie.Value = CookieValue;
   // Set the cookie expiration date.
   myCookie.Expires = now.AddYears(1);
   if(this.Response.Cookies[CookieName]!=null)
    this.Response.Cookies.Remove(CookieName);
   // Add the cookie.
   this.Response.Cookies.Add(myCookie);
  }
  private string GetCookie(string CookieName)
  {
   HttpCookie myCookie = new HttpCookie(CookieName);
   myCookie = Request.Cookies[CookieName];

   // Read the cookie information and display it.
   if (myCookie != null)
    return myCookie.Value;
   else
    return null;
  }

  #region Web 窗体设计器生成的代码
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }
  
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {   
   this.Button1.Click += new System.EventHandler(this.Button1_Click);
   this.Button2.Click += new System.EventHandler(this.Button2_Click);
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion

  private void Button1_Click(object sender, System.EventArgs e)
  {
  SaveCookie("mycookie","网际浪子");
  }

  private void Button2_Click(object sender, System.EventArgs e)
  {
   Response.Write(GetCookie("mycookie"));
  }

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