C#使用cookie记住密码
记住密码：（Cookie）
第一步：在加载页面里面先定义一个Cookie对象
HttpCookie cookie = CookieHelper.GetCookie("UserPass");
//判断Cookie是否为空
if (cookie != null)
{
// 把UserPass值转换给哪个类型的UserInfoCookie
System.Collections.Specialized.NameValueCollection UserInfoCookie = Request.Cookies["UserPass"].Values;
this.UserName.Text =System.Web.HttpUtility.UrlDecode(UserInfoCookie["Uname"]);//转为编码格式
//不能直接把密码为Password的文本框直接赋值
解决办法为 ：txtPassword.Attributes["value"] = "123"
this.UserPass.Attributes["value"] = UserInfoCookie["Upass"]; }
第二步：
//判断复选框是否被选中
if (this.RemPass.Checked)
{
//实例化Cookie的值
HttpCookie Cookie = CookieHelper.GetCookie("UserPass");
{
if (Cookie == null)
{
Cookie = new HttpCookie("UserPass");
// cookie.Values.Add("loginname", System.Web.HttpUtility.UrlEncode(User_Name));//增加属性
Cookie.Values.Add("Uname", System.Web.HttpUtility.UrlEncode(User_Name)); //转为Utf_8格式
Cookie.Values.Add("Upass", PassWord);
//设置Cookie过期时间
Cookie.Expires = DateTime.Now.AddMinutes(1);
CookieHelper.AddCookie(Cookie);
}
else //cookie不为空
if(!Cookie.Values["Uname"].Equals(User_Name)&& !Cookie.Values["Upass"].Equals(PassWord))
{
CookieHelper.SetCookie("UserPass", "Uname", User_Name);
CookieHelper.SetCookie("UserPass", "Upass", PassWord);
}
第三步：
CookieHelp
/// <summary>
/// 获取cookie的值
/// </summary>
/// <param name="CookieName"></param>
/// <returns></returns>
public static string GetCookieValue(string CookieName)
{
return GetCookieValue(CookieName);
}
/// <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].ToString(), key);
return null;
}
/// <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;
}
/// <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);//设置过期时间
}
/// <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)//是否具有主键
cookie.Values.Set(key, value);
else
if (!string.IsNullOrEmpty(value))
cookie.Value = value;
if (expires != null)
cookie.Expires = expires.Value;
response.SetCookie(cookie);
}
}
}
-----------------------------cookieHelper
public class CookieHelper
{
/// <summary>
/// 获取cookie的值
/// </summary>
/// <param name="CookieName"></param>
/// <returns></returns>
public static string GetCookieValue(string CookieName)
{
return GetCookieValue(CookieName);
}
/// <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].ToString(), key);
return null;
}
/// <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;
}
#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
}
