cookie记住用户名

using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; /// <summary> /// CookiesHelper 的摘要说明 /// </summary> public class CookiesHelper { #region 获取Cookie /// <summary> /// 获得Cookie的值 /// </summary> /// <param name="cookieName"></param> /// <returns></returns> public static string GetCookieValue(string cookieName) { return GetCookieValue(cookieName, null); } /// <summary> /// 获得Cookie的值 /// </summary> /// <param name="cookieName"></param> /// <param name="key"></param> /// <returns></returns> public static string GetCookieValue(string cookieName, string key) { HttpRequest request = HttpContext.Current.Request; if (request != null) return GetCookieValue(request.Cookies[cookieName], key); return ""; } /// <summary> /// 获得Cookie的子键值 /// </summary> /// <param name="cookie"></param> /// <param name="key"></param> /// <returns></returns> public static string GetCookieValue(HttpCookie cookie, string key) { if (cookie != null) { if (!string.IsNullOrEmpty(key) && cookie.HasKeys) return cookie.Values[key]; else return cookie.Value; } return ""; } /// <summary> /// 获得Cookie /// </summary> /// <param name="cookieName"></param> /// <returns></returns> public static HttpCookie GetCookie(string cookieName) { HttpRequest request = HttpContext.Current.Request; if (request != null) return request.Cookies[cookieName]; return null; } #endregion #region 删除Cookie /// <summary> /// 删除Cookie /// </summary> /// <param name="cookieName"></param> public static void RemoveCookie(string cookieName) { RemoveCookie(cookieName, null); } /// <summary> /// 删除Cookie的子键 /// </summary> /// <param name="cookieName"></param> /// <param name="key"></param> public static void RemoveCookie(string cookieName, string key) { HttpResponse response = HttpContext.Current.Response; if (response != null) { HttpCookie cookie = response.Cookies[cookieName]; if (cookie != null) { if (!string.IsNullOrEmpty(key) && cookie.HasKeys) cookie.Values.Remove(key); else response.Cookies.Remove(cookieName); } } } #endregion #region 设置/修改Cookie /// <summary> /// 设置Cookie子键的值 /// </summary> /// <param name="cookieName"></param> /// <param name="key"></param> /// <param name="value"></param> public static void SetCookie(string cookieName, string key, string value) { SetCookie(cookieName, key, value, null); } /// <summary> /// 设置Cookie值 /// </summary> /// <param name="key"></param> /// <param name="value"></param> public static void SetCookie(string key, string value) { SetCookie(key, null, value, null); } /// <summary> /// 设置Cookie值和过期时间 /// </summary> /// <param name="key"></param> /// <param name="value"></param> /// <param name="expires"></param> public static void SetCookie(string key, string value, DateTime expires) { SetCookie(key, null, value, expires); } /// <summary> /// 设置Cookie过期时间 /// </summary> /// <param name="cookieName"></param> /// <param name="expires"></param> public static void SetCookie(string cookieName, DateTime expires) { SetCookie(cookieName, null, null, expires); } /// <summary> /// 设置Cookie /// </summary> /// <param name="cookieName"></param> /// <param name="key"></param> /// <param name="value"></param> /// <param name="expires"></param> public static void SetCookie(string cookieName, string key, string value, DateTime? expires) { HttpResponse response = HttpContext.Current.Response; if (response != null) { HttpCookie cookie = response.Cookies[cookieName]; if (cookie != null) { if (!string.IsNullOrEmpty(key) && cookie.HasKeys) cookie.Values.Set(key, value); else if (!string.IsNullOrEmpty(value)) cookie.Value = value; if (expires != null) cookie.Expires = expires.Value; response.SetCookie(cookie); } } } #endregion #region 添加Cookie /// <summary> /// 添加Cookie /// </summary> /// <param name="key"></param> /// <param name="value"></param> public static void AddCookie(string key, string value) { AddCookie(new HttpCookie(key, value)); } /// <summary> /// 添加Cookie /// </summary> /// <param name="key"></param> /// <param name="value"></param> /// <param name="expires"></param> public static void AddCookie(string key, string value, DateTime expires) { HttpCookie cookie = new HttpCookie(key, value); cookie.Expires = expires; AddCookie(cookie); } /// <summary> /// 添加为Cookie.Values集合 /// </summary> /// <param name="cookieName"></param> /// <param name="key"></param> /// <param name="value"></param> public static void AddCookie(string cookieName, string key, string value) { HttpCookie cookie = new HttpCookie(cookieName); cookie.Values.Add(key, value); AddCookie(cookie); } /// <summary> /// 添加为Cookie集合 /// </summary> /// <param name="cookieName">Cookie名称</param> /// <param name="expires">过期时间</param> public static void AddCookie(string cookieName, DateTime expires) { HttpCookie cookie = new HttpCookie(cookieName); cookie.Expires = expires; AddCookie(cookie); } /// <summary> /// 添加为Cookie.Values集合 /// </summary> /// <param name="cookieName"></param> /// <param name="key"></param> /// <param name="value"></param> /// <param name="expires"></param> public static void AddCookie(string cookieName, string key, string value, DateTime expires) { HttpCookie cookie = new HttpCookie(cookieName); cookie.Expires = expires; cookie.Values.Add(key, value); AddCookie(cookie); } /// <summary> /// 添加Cookie /// </summary> /// <param name="cookie"></param> public static void AddCookie(HttpCookie cookie) { HttpResponse response = HttpContext.Current.Response; if (response != null) { //指定客户端脚本是否可以访问[默认为false] cookie.HttpOnly = true; //指定统一的Path，比便能通存通取 cookie.Path = "/"; //设置跨域,这样在其它二级域名下就都可以访问到了 //cookie.Domain = "chinesecoo.com"; response.AppendCookie(cookie); } } #endregion }

这是别人博客的上看到的 网址不记得了

if (!IsPostBack) { HttpCookie Cookie = CookiesHelper.GetCookie("UserInfo"); if (Cookie != null) { this.txtUserName.Text = Cookie.Values["uName"]; } } if (ckSave.Checked) { HttpCookie Cookie = CookiesHelper.GetCookie("UserInfo"); if (Cookie == null) { Cookie = new HttpCookie("UserInfo"); Cookie.Values.Add("uName", uName); //设置Cookie过期时间 Cookie.Expires = DateTime.Now.AddDays(30); CookiesHelper.AddCookie(Cookie); } else if (!Cookie.Values["uName"].Equals(uName)) CookiesHelper.SetCookie("UserInfo", "uName", uName); }