使用CookieHelper帮助类：
public class CookieHelper
{ #region 获取Cookie /// <summary>
/// 获得Cookie的值
/// </summary>
/// <param name="cookieName"></param>
/// <returns></returns>
public static string GetCookieValue(string cookieName)
{
HttpRequest request = HttpContext.Current.Request;
if (request != null)
return GetCookieValue(request.Cookies[cookieName]);
return "";
} /// <summary>
/// 获得Cookie的值
/// </summary>
/// <param name="cookie"></param>
/// <returns></returns>
public static string GetCookieValue(HttpCookie cookie)
{
if (cookie != null)
{
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)
{
HttpResponse response = HttpContext.Current.Response;
if (response != null)
{
HttpCookie cookie = response.Cookies[cookieName];
if (cookie != null)
{
response.Cookies.Remove(cookieName);
}
}
} #endregion #region 设置/修改Cookie /// <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 value, DateTime? expires)
{
Guard.IsNotNullOrEmpty(cookieName, "cookieName"); HttpResponse response = HttpContext.Current.Response;
if (response != null)
{
HttpCookie cookie = response.Cookies[cookieName];
if (cookie != null)
{
cookie.Value = value;
if (expires != null)
cookie.Expires = expires.Value;
response.SetCookie(cookie);
}
} } #endregion #region 添加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 value, DateTime expires)
{
Guard.IsNotNullOrEmpty(cookieName, "cookieName"); HttpCookie cookie = new HttpCookie(cookieName);
cookie.Expires = expires;
cookie.Value = 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 = "nas.com";
response.AppendCookie(cookie);
}
} #endregion
}
设置cookie：
public static string VCLoginName
{
get
{
try
{
return CookieHelper.GetCookieValue("VCLoginName").ToStr();
}
catch
{
return "";
}
}
set
{
var cookie = CookieHelper.GetCookie("VCLoginName");
if (cookie != null)
{
CookieHelper.SetCookie("VCLoginName", value, DateTime.Now.AddHours());
}
else
{
//有效期，一个钟头
CookieHelper.AddCookie("VCLoginName", value, DateTime.Now.AddHours());
} }
}
设置：
SysContext.VCLoginName = user.LoginName;
js获取和设置cookie：
function getCookie(cname) {
console.log("开始")
console.log(document.cookie)
console.log("结束")
var arrStr = document.cookie.split("; ");
for (var i = 0; i < arrStr.length; i++) {
var temp = arrStr[i].split("=");
if (temp[0] == cname) return unescape(temp[1]);
}
}
//添加cookie
function addCookie(cname, cvalue, ctime) {
var str = cname + "=" + escape(cvalue);
if (ctime > 0) { //为时不设定过期时间，浏览器关闭时cookie自动消失
var date = new Date();
var ms = ctime * 3600 * 1000;
date.setTime(date.getTime() + ms);
str += "; expires=" + date.toGMTString();
alert(cname + cvalue);
}
document.cookie = str;
}
遇到的问题:
后台设置cookie但是通过js无法获取相应的cookie的值，why？
不知道。但是自己在一般处理程序中写的cookie却可以通过js获得。why？
HttpCookie cookie = new HttpCookie("LoginName", HttpUtility.UrlEncode(username)); //定义cookie对象以及名为DocUrl的项
DateTime dt = DateTime.Now; //定义时间对象
TimeSpan ts = new TimeSpan(, , , ); //天，小时，分钟，秒 ,cookie有效作用时间
cookie.Expires = dt.Add(ts); //添加作用时间
context.Response.AppendCookie(cookie); //确定写入cookie中
解决：
因为CookieHelper中设置了cookie的HttpOnly为true。
ASP.Net中HttpCookie对象的HttpOnly 属性 指定一个Cookie 是否可通过客户端脚本访问。不能通过客户端脚本访问为 true；否则为 false。默认值为 false。此属性并不能完全阻止客户端在本地获取cookies，但是可以增加通过脚本直接获取的难度。