最近看到某公司某項目中用於保存多個城市信息到cookie中的方法，該方法的邏輯是按時間順序記錄最近訪問過的三個城市的名字及id，邏輯包插入與含排重。插入與排重的代碼如下：
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獲取cityid與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
{
//沒有相等的
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);
}
|
點評：對於存儲的中文信息需要編碼，否則在部分瀏覽器無法存儲，這是這段代碼可以肯定的地方。但對於同類信息用到了六個cookie，反復的存取降低了代碼的效率，最好存儲在一個cookie中。另外即使考慮到數據量不大采用上面的方法，對於單個cookie最好先獲取cookie中的值到一個變量當中，在需要讀取cookie值的地方利用該變量即可，這樣可以降低對cookie的讀取次數。
看完了上面的代碼，我們再來看看另外一塊比較合乎規范的代碼：
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/// <summary>
/// 添加一對名稱地址到cookie中
/// </summary>
/// <param name="name">地址名稱</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(
"\\"
,
"\\\\"
);
//對斜線的轉義
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,
"解析出錯"
);
}
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);
}
|
點評：上面的方法將一個序列化的對象集合存儲在cookie當中，可以存儲更多的信息，也更加健壯。在開發過程中要不斷的學習，精益求精，否則即使工作時間再長，也只是增加了干活兒的熟練程度罷了，並不能獲得真正的能力提高。
本文出自 “鯤鵬擊浪” 博客，請務必保留此出處http://8907792.blog.51cto.com/8897792/1837185