最近看到某公司某项目中用于保存多个城市信息到cookie中的方法，该方法的逻辑是按时间顺序记录最近访问过的三个城市的名字及id，逻辑包插入与含排重。插入与排重的代码如下：
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获取cityid与cityname
if
(cityid == Utility.TypeParse.ToInt(CookieHelper.
get
(
"fwid1"
)))
{
}
else
if
(cityid == Utility.TypeParse.ToInt(CookieHelper.
get
(
"fwid2"
)))
{
//CookieHelper.set("fwname3", CookieHelper.get("fwname2"), 10);
CookieHelper.
set
(
"fwname2"
, CookieHelper.
get
(
"fwname1"
), 10);
CookieHelper.
set
(
"fwname1"
, HttpUtility.UrlEncode(cityname), 10);
//CookieHelper.set("fwid3", CookieHelper.get("fwid2"), 10);
CookieHelper.
set
(
"fwid2"
, CookieHelper.
get
(
"fwid1"
), 10);
CookieHelper.
set
(
"fwid1"
, cityid.ToString(), 10);
}
else
if
(cityid == Utility.TypeParse.ToInt(CookieHelper.
get
(
"fwid3"
)))
{
CookieHelper.
set
(
"fwname3"
, CookieHelper.
get
(
"fwname2"
), 10);
CookieHelper.
set
(
"fwname2"
, CookieHelper.
get
(
"fwname1"
), 10);
CookieHelper.
set
(
"fwname1"
, HttpUtility.UrlEncode(cityname), 10);
CookieHelper.
set
(
"fwid3"
, CookieHelper.
get
(
"fwid2"
), 10);
CookieHelper.
set
(
"fwid2"
, CookieHelper.
get
(
"fwid1"
), 10);
CookieHelper.
set
(
"fwid1"
, cityid.ToString(), 10);
}
else
{
//没有相等的
CookieHelper.
set
(
"fwname3"
, CookieHelper.
get
(
"fwname2"
), 10);
CookieHelper.
set
(
"fwname2"
, CookieHelper.
get
(
"fwname1"
), 10);
CookieHelper.
set
(
"fwname1"
, HttpUtility.UrlEncode(cityname), 10);
CookieHelper.
set
(
"fwid3"
, CookieHelper.
get
(
"fwid2"
), 10);
CookieHelper.
set
(
"fwid2"
, CookieHelper.
get
(
"fwid1"
), 10);
CookieHelper.
set
(
"fwid1"
, cityid.ToString(), 10);
}
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点评：对于存储的中文信息需要编码，否则在部分浏览器无法存储，这是这段代码可以肯定的地方。但对于同类信息用到了六个cookie，反复的存取降低了代码的效率，最好存储在一个cookie中。另外即使考虑到数据量不大采用上面的方法，对于单个cookie最好先获取cookie中的值到一个变量当中，在需要读取cookie值的地方利用该变量即可，这样可以降低对cookie的读取次数。
看完了上面的代码，我们再来看看另外一块比较合乎规范的代码：
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/// <summary>
/// 添加一对名称地址到cookie中
/// </summary>
/// <param name="name">地址名称</param>
/// <param name="url">地址url</param>
public
static
void
AddKeyWord(
string
name,
string
url,
string
detailName=
""
,
int
i = 0,
string
shortDomain)
{
List<KeyWord> kwLists =
new
List<KeyWord>();
if
(
string
.IsNullOrEmpty(name) ||
string
.IsNullOrEmpty(url)||name.Trim().ToLower()==
"null"
)
return
;
HttpContext context = System.Web.HttpContext.Current;
name = context.Server.UrlDecode(name);
cookieName = baseCookieName + shortDomain;
string
kw = ClientCookie.Get(cookieName);
if
(name.IndexOf(
"％"
) > -1 || name.IndexOf(
"%"
) > -1)
{
name = context.Server.UrlDecode(name);
if
(name.IndexOf(
"％"
) > -1 || name.IndexOf(
"%"
) > -1)
return
;
}
name = name.Replace(
">"
,
">"
);
name = name.Replace(
"<"
,
"<"
);
name = name.Replace(
" "
,
" "
);
name = name.Replace(
"\""
,
"""
);
name = name.Replace(
"\'"
,
"'"
);
name = name.Replace(
"\\"
,
"\\\\"
);
//对斜线的转义
name = name.Replace(
"\n"
,
"\\n"
);
name = name.Replace(
"\r"
,
"\\r"
);
if
(!
string
.IsNullOrEmpty(kw))
{
try
{
kwLists = JsonConvert.DeserializeObject<List<KeyWord>>(kw);
}
catch
(Exception ex)
{
LogerHelper.WriteMessegeError(kw,
"解析出错"
);
}
foreach
(KeyWord myKey
in
kwLists)
{
if
(name.Trim()==myKey.name.Trim()||myKey.url == url.Trim().ToLower())
{
return
;
}
}
if
(kwLists.Count >= 3)
{
kwLists.RemoveAt(0);
}
}
kwLists.Add(
new
KeyWord() { name = name.Trim(), url = url.Trim(), sort = i, detailName = detailName });
ClientCookie.Set(cookieName,JsonConvert.SerializeObject(kwLists),3,shortDomain);
}
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点评：上面的方法将一个序列化的对象集合存储在cookie当中，可以存储更多的信息，也更加健壮。在开发过程中要不断的学习，精益求精，否则即使工作时间再长，也只是增加了干活儿的熟练程度罢了，并不能获得真正的能力提高。
本文出自 “鲲鹏击浪” 博客，请务必保留此出处http://8907792.blog.51cto.com/8897792/1837185