最近在做网站的过程中遇见这么一个问题,首先在js中保存了一个名字为monkey的cookie,然后呢再在aspx.cs中用C#的方法去给名字为monkey的cookie设置值为空,结果调试发现cookies集合居然存了两份值。然后我就去查看cookie文件,才发现原来它们保存在了不同的文件下。

使用js保存cookie的代码如下:

jQuery.cookie = function (name, value, options) {
    if (typeof value != 'undefined') {
        options = options || {};
        if (value === null) {
            value = '';
            options.expires = -1;
        }
        var expires = '';
        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
            var date;
            if (typeof options.expires == 'number') {
                date = new Date();
                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
            } else {
                date = options.expires;
            }
            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
        }
        var path = options.path ? '; path=' + options.path : '';
        var domain = options.domain ? '; domain=' + options.domain : '';
        var secure = options.secure ? '; secure' : '';
        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
    } else { // only name given, get cookie
        var cookieValue = null;
        if (document.cookie && document.cookie != '') {
            var cookies = document.cookie.split(';');
            for (var i = 0; i < cookies.length; i++) {
                var cookie = jQuery.trim(cookies[i]);
                // Does this cookie string begin with the name we want?
                if (cookie.substring(0, name.length + 1) == (name + '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    break;
                }
            }
        }
        return cookieValue;
    }
};

C#保存cookie写法如下:

public void WriteCookie(string strName, string strValue)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies[strName];
            if (cookie == null)
            {
                cookie = new HttpCookie(strName);
            }
            cookie.Value = strValue;
            HttpContext.Current.Response.AppendCookie(cookie);
        }

原来错误写法:

$(function () {

    //点击按钮保存cookie
            $("#btnSet").click(function () {
               $.cookie("monkey", "kanbujian");
                alert("ok");
            });
        });

C#中:WriteCookie("monkey","");

此时可以通过监视发现:HttpContext.Current.Request.Cookies.AllKeys 中存在着两条为monkey的数据。

正确的写法:

$(function () {
            $("#btnSet").click(function () {
                //经过证明发现:如果这里不设置path,那么它保存的和C#方法保存的会在不同的文件下面。因为路径的关系。
                $.cookie("monkey", "kanbujian", { path: "/" });
                alert("ok");
            });
        });
    </script>

这么写以后,在C#中操作的就是JS保存的这个cookie了。

本文供新手相互研究。写得不好,请见谅。

posted on 2012-10-31 17:52  猴子78  阅读(199)  评论(0编辑  收藏  举报