创建：
HttpCookie cookie = new HttpCookie("regID"); cookie .Value = username; cookie .Expires = DateTime.Now.AddDays(1); Response.Cookies.Add(cookie);
创建有子键的：
Response.Cookies["user"]["userName"] = Server.UrlEncode("大西瓜");//使用UrlEncode是为了使用javascript取出时不是乱码或： HttpCookie cookie=new HttpCookie("user"); cookie.Values["userName"] = "aaa"; //cookie.Values.Add("userName","aaa"); cookie .Expires = DateTime.Now.AddDays(1); Response.Cookies.Add(cookie) //Response.AppendCookie(cookie) ;
消除：直接删除没法删，因为COOKIE创建以后就保存在用户机器上了而不是在服务端
这样全部删除：
private HttpCookie cookie = null; private string cookieName = string.Empty;
for (int i = 0; i < Request.Cookies.Count; i++) { cookieName = Request.Cookies[i].Name; cookie = new HttpCookie(cookieName); cookie .Expires = DateTime.Now.AddDays(-1); Response.Cookies.Add(cookie ); }
删除子键： HttpCookie cookie; cookie = Request.Cookies["userInfo"]; cookie .Values.Remove("userName"); cookie .Expires = DateTime.Now.AddDays(1); Response.Cookies.Add(cookie);
使用javascript 获得 cookie：
function get_head_cookie(c_name){
if (document.cookie.length>0) { c_start=document.cookie.indexOf(c_name + "="); if (c_start!=-1) { c_start=c_start + c_name.length+1; c_end=document.cookie.indexOf(";",c_start); if (c_end==-1) { c_end=document.cookie.length; } return decodeURIComponent(myreplace_head(document.cookie.substring(c_start,c_end),'+',' ')); } } return null;}
var email = get_head_cookie('regID');var nickname = get_head_cookie('userName');
if(email != '' && email != null && nickname != '' && nickname != null){ //cookie存在的情况}else{ //cookie为空的情况
}
转载于:https://www.cnblogs.com/terrorpig/archive/2009/01/02/1366847.html
