cookie简单应用-记住用户名

直接看几段简单代码：

if (this.cbUserName.Checked == true)
                {

                    SetMyCookie("UserName", txt_UserID.Text.Trim());

                }
                else
                {
                    HttpCookie aCookie;
                    string cookieName;
                    int limit = Request.Cookies.Count;
                    for (int i = 0; i < limit; i++)
                    {
                        cookieName = Request.Cookies[i].Name;
                        if (cookieName == "UserName")
                        {
                            aCookie = new HttpCookie(cookieName);
                            aCookie.Expires = DateTime.Now.AddDays(-1);
                            Response.Cookies.Add(aCookie);
                            break;
                        }
                    }
                }

设置Cookie

public void SetMyCookie(string name, string vals)
        {
            HttpCookie cookie = new HttpCookie(name, System.Web.HttpUtility.UrlEncode(vals, System.Text.Encoding.GetEncoding("utf-8")));
            cookie.Expires = DateTime.Now.AddDays(30);
            HttpContext.Current.Response.Cookies.Add(cookie);
        }

获取Cookie

 public string GetMyCookie(string name)
        {
            if (HttpContext.Current.Request.Cookies[name] != null)
                return System.Web.HttpUtility.UrlDecode(HttpContext.Current.Request.Cookies[name].Value, System.Text.Encoding.GetEncoding("utf-8"));
            return "";
        }