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最新回應
  • Newtonsoft.Json.JsonConvert.DeserializeObject 失敗的情況
    test...more
  • dotnet ef dbcontext scaffold
    ...more
  • [ASP.NET] 利用 aspnet_regiis 加密 web.config
    ...more
  • IIS ARR (reverse proxy) 服務安裝
    ...more
  • [錯誤訊息] 請加入 ScriptResourceMapping 命名的 jquery (區分大小寫)
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  • 用 Javascript 跨網頁讀取 cookie (Cookie cross page, path of cookie)
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    太感謝你了~~~你救了我被windows 認證卡了好幾天QQ...more
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頁數 3 / 3 上一頁
搜尋 cache 結果:
[程式片段][後台]VB懶惰版快取
        
'更新
        If UW.WU.IsNonEmptyFromQueryStringOrForm("Refresh") Then
            System.Web.HttpContext.Current.Cache.Remove(CacheName)
        End If
        '快取部分
        If obj Is Nothing Then
            Dim SQL As String = ""
            SQL = "select * from Product with (nolock)"
            obj = UW.SQL.DTFromSQL(SQL)

            Dim AC As New AggregateCacheDependency

            Dim DepArray() As CacheDependency = { _
                 New SqlCacheDependency(UW.SQL.sqlCacheDependencyName, "Product"), _
                 New SqlCacheDependency(UW.SQL.sqlCacheDependencyName, "Product_Category") _
            }

            AC.Add(DepArray)
            Dim FD As New CacheDependency(UW.Template.TemplateRoot & "2013UI\Product\DirectBuyAllProduct.html")
            AC.Add(FD)

            System.Web.HttpContext.Current.Cache.Insert(CacheName, obj, AC)

        End If
More...
Doug, 2014/1/15 下午 02:12:27
DataTable 的 Rows.Find 效能較佳
因為 SHOPUNT 的線上產品有兩千多筆,然後網站有非常頻繁的查詢
例如檢查產品是否停賣

原本的寫法是用以下方法尋找

DT.Select("Id=" & ProductId) 


後來改寫 DataTable 加上 PrimaryKey

'寫入Cache前先設定好
DT.PrimaryKey = New DataColumn() {obj.Columns("Id")} 
Dim row As DataRow = DT.Rows.Find(ProductId)


共1085筆 找出其中一筆 
Select方法  - 00:00:00.0000559
Rows.Find -   00:00:00.0000064

兩者速度差了約10倍
 
More...
darren, 2013/9/5 上午 11:58:39
建立sp_who3(Connection pool 執行的 SQL 指令)
USE [master]
GO
/****** Object: StoredProcedure [dbo].[sp_who3]    Script Date: 06/26/2008 09:40:54 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[sp_who3]    
(    
@filter tinyint = 1,    
@filterspid int = NULL    
)    
AS    
SET NOCOUNT ON;    
    
DECLARE @processes TABLE    
(    
spid int,    
blocked int,    
databasename varchar(256),    
hostname varchar(256),    
program_name varchar(256),    
loginame varchar(256),    
status varchar(60),    
cmd varchar(128),    
cpu int,    
physical_io int,    
[memusage] int,    
login_time datetime,    
last_batch datetime,    
current_statement_parent xml,
current_statement_sub xml)

INSERT INTO @processes    
SELECT sub.*
FROM
(
SELECT sp.spid,    
sp.blocked,    
sd.name,    
RTRIM(sp.hostname) AS hostname,
RTRIM(sp.[program_name]) AS [program_name],    
RTRIM(sp.loginame) AS loginame,    
RTRIM(sp.status) AS status,    
sp.cmd,    
sp.cpu,    
sp.physical_io,    
sp.memusage,    
sp.login_time,    
sp.last_batch,
(
    SELECT
LTRIM(st.text) AS [text()]
    FOR XML PATH(''), TYPE
) AS parent_text,
(
    SELECT
LTRIM(CASE
WHEN LEN(COALESCE(st.text, '')) = 0 THEN NULL
ELSE SUBSTRING(st.text, (er.statement_start_offset/2)+1,
((CASE er.statement_end_offset
WHEN -1 THEN DATALENGTH(st.text)
ELSE er.statement_end_offset
END - er.statement_start_offset)/2) + 1)
END) AS [text()]
FROM sys.dm_exec_requests er CROSS APPLY sys.dm_exec_sql_text(er.sql_handle) AS st
WHERE er.session_id = sp.spid
    FOR XML PATH(''), TYPE
) AS child_text
FROM sys.sysprocesses sp WITH (NOLOCK) LEFT JOIN sys.sysdatabases sd WITH (NOLOCK) ON sp.dbid = sd.dbid
CROSS APPLY sys.dm_exec_sql_text(sp.sql_handle) AS st
) sub INNER JOIN sys.sysprocesses sp2 ON sub.spid = sp2.spid
ORDER BY
sub.spid

-- if specific spid required    
IF @filterspid IS NOT NULL    
DELETE @processes    
WHERE spid <> @filterspid    
    
-- remove system processes    
IF @filter = 1 OR @filter = 2    
DELETE @processes    
WHERE spid < 51
OR spid = @@SPID
    
-- remove inactive processes    
IF @filter = 2    
DELETE @processes    
WHERE status = 'sleeping'    
AND cmd IN ('AWAITING COMMAND')    
AND blocked = 0    

SELECT spid,    
blocked,    
databasename,    
hostname,    
loginame,    
status,    
current_statement_parent,
current_statement_sub,
cmd,    
cpu,    
physical_io,    
program_name,    
login_time,    
last_batch    
FROM @processes    
ORDER BY spid

RETURN 0;


查詢過濾sp_who3

DECLARE @Table TABLE(
        spid int,    
        blocked int,    
        databasename varchar(256),    
        hostname varchar(256),    
        loginame varchar(256),    
        status varchar(60),    
        current_statement_parent xml,
        current_statement_sub xml,
        cmd varchar(128),    
        cpu int,    
        physical_io int,    
        program_name varchar(256),    
        login_time datetime,    
        last_batch datetime
)

INSERT INTO @Table EXEC sp_who3

SELECT *
FROM    @Table
WHERE databasename= 'Leon' and cmd = 'AWAITING COMMAND'
and CAST(current_statement_parent AS nvarchar(max)) not LIKE '%AspNet_SqlCachePollingStoredProcedure%'
order by CAST(current_statement_parent AS nvarchar(max))
More...
Reiko, 2013/5/3 上午 10:48:08
Jquery Ajax error 之 parsererror 訊息
最近弄ajax 發現一個現象 先記起來一下
當 ajax dataType 是 json 時
            $.ajax({
                cache: false,
                data: "fun=SetAsBestAnswer&aid=" + articleId + "&rid=" + replyId,
                dataType: "json",
                success: function (objData, strTextStatus) {
                ...........

response的文字它會自動轉為物件,是以 jQuery.parseJSON 處理轉為此範例的 objData
但是有時會發生 parsererror 的錯誤
後來我發現是因為json 的 key 值必須要雙引號包起來才可以
然後字串內容也不能有斜線+單引號 \'   所以以下三者都是會失敗的
{test: "I'm a student."} 
{'test': "I'm a student."}
{"test": "I\'m a student."}

以下兩個都是OK的
{"test": "I'm a student."} --> OK
{"test": "I\u0027m a student."} --> OK


More...
darren, 2012/8/17 上午 11:39:28
global.asax 的事件
從 http://blog.ie-soft.de/post/2007/12/globalasax-events.aspx  抄來的. 留作參考

HttpApplication Events:

Application_AcquireRequestState
Occurs when ASP.NET acquires the current state (for example, session state) that is associated with the current request. 

Application_AuthenticateRequest
Occurs when a security module has established the identity of the user. 

Application_AuthorizeRequest
Occurs when a security module has verified user authorization. 

Application_BeginRequest
Occurs as the first event in the HTTP pipeline chain of execution when ASP.NET responds to a request. 

Application_Disposed
Adds an event handler to listen to the Disposed event on the application. 

Application_EndRequest
Occurs as the last event in the HTTP pipeline chain of execution when ASP.NET responds to a request. 

Application_Error
Occurs when an unhandled exception is thrown. 

Application_PostAcquireRequestState
Occurs when the request state (for example, session state) that is associated with the current request has been obtained. 

Application_PostAuthenticateRequest
Occurs when a security module has established the identity of the user. 

Application_PostAuthorizeRequest
Occurs when the user for the current request has been authorized. 

Application_PostMapRequestHandler
Occurs when ASP.NET has mapped the current request to the appropriate event handler. 

Application_PostReleaseRequestState
Occurs when ASP.NET has completed executing all request event handlers and the request state data has been stored. 

Application_PostRequestHandlerExecute
Occurs when the ASP.NET event handler (for example, a page or an XML Web service) finishes execution. 

Application_PostResolveRequestCache
Occurs when ASP.NET bypasses execution of the current event handler and allows a caching module to serve a request from the cache. 

Application_PostUpdateRequestCache
Occurs when ASP.NET completes updating caching modules and storing responses that are used to serve subsequent requests from the cache. 

Application_PreRequestHandlerExecute
Occurs just before ASP.NET begins executing an event handler (for example, a page or an XML Web service). 

Application_PreSendRequestContent
Occurs just before ASP.NET sends content to the client. 

Application_PreSendRequestHeaders
Occurs just before ASP.NET sends HTTP headers to the client. 

Application_ReleaseRequestState
Occurs after ASP.NET finishes executing all request event handlers. This event causes state modules to save the current state data. 

Application_ResolveRequestCache
Occurs when ASP.NET completes an authorization event to let the caching modules serve requests from the cache, bypassing execution of the event handler (for example, a page or an XML Web service). 

Application_UpdateRequestCache
Occurs when ASP.NET finishes executing an event handler in order to let caching modules store responses that will be used to serve subsequent requests from the cache. 

Application_Init
This method occurs after _start and is used for initializing code. 

Application_Start
As with traditional ASP, used to set up an application environment and only called when the application first starts.

Application_End
Again, like classic ASP, used to clean up variables and memory when an application ends.

Session Events:

Session_Start
As with classic ASP, this event is triggered when any new user accesses the web site.

Session_End
As with classic ASP, this event is triggered when a user's session times out or ends. Note this can be 20 mins (the default session timeout value) after the user actually leaves the site.

Profile Events:

Profile_MigrateAnonymous
Occurs when the anonymous user for a profile logs in.

Passport Events:

PassportAuthentication_OnAuthenticate
Raised during authentication. This is a Global.asax event that must be named PassportAuthentication_OnAuthenticate.
 

Possibly more events defined in other HttpModules like:

System.Web.Caching.OutputCacheModule
System.Web.SessionState.SessionStateModule
System.Web.Security.WindowsAuthentication
System.Web.Security.FormsAuthenticationModule
System.Web.Security.PassportAuthenticationModule
System.Web.Security.UrlAuthorizationModule
System.Web.Security.FileAuthorizationModule
System.Web.Profile.ProfileModule

More...
Bike, 2012/6/9 上午 08:55:08
查看資料庫最耗時的Sql Command
從網路找到改良的,直接查不用開Sql Profiler

加入可指定資料庫的改良
SELECT TOP 100 execution_count, total_worker_time, last_worker_time, max_worker_time, min_worker_time, CONVERT(INT, att.value) AS dbid, DB_NAME(CONVERT(INT, att.value)) as dbname ,SUBSTRING(st.text, (qs.statement_start_offset/2) + 1,((CASE statement_end_offset WHEN -1 THEN DATALENGTH(st.text)ELSE qs.statement_end_offset END - qs.statement_start_offset)/2) + 1) as statement_text
FROM sys.dm_exec_query_stats as qs 
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as st
CROSS APPLY sys.dm_exec_plan_attributes(qs.plan_handle) att
WHERE att.attribute='dbid' and DB_NAME(CONVERT(INT, att.value)) = 'P9'
ORDER BY execution_count DESC 


以執行次數排序,可檢查爆量的Sql
Where statement_start_offset =0 測起來可以篩掉系統的Query,如:AspNet_SqlCache
SELECT TOP 10 execution_count, total_worker_time, last_worker_time, max_worker_time, min_worker_time, SUBSTRING(st.text, (qs.statement_start_offset/2) + 1,((CASE statement_end_offset WHEN -1 THEN DATALENGTH(st.text)ELSE qs.statement_end_offset END - qs.statement_start_offset)/2) + 1) as statement_text
FROM sys.dm_exec_query_stats as qs CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as st
WHERE statement_start_offset = 0
ORDER BY execution_count DESC  


以總執行時間排序,檢查寫耗時的Sql
SELECT TOP 10 total_worker_time, last_worker_time, max_worker_time, min_worker_time, SUBSTRING(st.text, (qs.statement_start_offset/2) + 1,((CASE statement_end_offset WHEN -1 THEN DATALENGTH(st.text)ELSE qs.statement_end_offset END - qs.statement_start_offset)/2) + 1) as statement_text
FROM sys.dm_exec_query_stats as qs CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as st
ORDER BY max_worker_time DESC


結果如下


 
More...
Jerry, 2012/6/8 下午 12:50:24
Squid Proxy 設定
Squid Proxy 相關處理

主站
http://www.squid-cache.org/

Windows 版本
http://squid.acmeconsulting.it/

解壓縮至 c:\squid

指令
\sbin\squid.exe
squid -?
squid -z d:\squid\var\cache 暫存目錄設定
squid -i 加入服務
squid -n Squid -k reconfigure 設定檔更新可重置,重啟服務也可以

設定檔
\etc\squid.conf
建議co個用過的來抄

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
將某一檔案更新做法
C:\squid\bin>squidclient -h localhost -p 80 -m PURGE http://bserver.img.photosharp.com.tw/Image/Advert/360x120_v1_260x87s120.jpg

若不行需設定 squid.conf
參考 http://help.getbusi.com/kb/getbusi-alert-advance/removing-individual-objects-from-squid-cache
acl manager proto cache_object 後加入一行 acl Purge method PURGE
http_access allow manager localhost 後加入一行 http_access allow localhost Purge
http_access deny manager 後加入一行 http_access deny Purge

設定檔重置
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Web & Squid 共存(不同 IP 共用80Port)

如 192.168.0.203(Web), 192.168.0.201(Squid)
IIS 的網站需指定(192.168.0.203)

squid.conf 設定檔需修改 IP 位置
http_port 192.168.0.201:80 transparent

改變 IIS 監聽 IP 的範圍
=-=-=-= Windows Server 2003 =-=-=-=
Windows Server 2003 CD\Support\Tools\Support.msi 安裝後
C:\Program Files\Support Tools 下有程式 httpcfg
httpcfg delete iplisten -i 0.0.0.0
httpcfg set iplisten -i 192.168.0.203
=-=-=-= Windows Server 2008 =-=-=-=
netsh 進入指令模式
netsh>http
netsh http>add iplisten ipaddress=192.168.0.203:80 (會取代 0.0.0.0)

重啟指令
net stop http /y
net start w3svc查看指令

netstat -an
tcp 0.0.0.0:80 需沒有
tcp 192.168.0.203:80 需有

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HTTP\Parameters\ListenOnlyList
會列出開機時會載入的 httpcfg set iplisten,若 ip 有設錯 iis 可能會出現 "指定的網路名稱格式不正確"
 

More...
Jerry, 2012/6/8 下午 12:46:09
VB 轉 C# 問題整理
之前將部分UW網站VB程式碼轉到C#,
我是用此工具轉
http://www.developerfusion.com/tools/convert/vb-to-csharp/
轉換後,放到visual studio還是有很多毛毛蟲
整理一些問題, 希望能減少轉換上的困難
 
1. Imports --> using (using 只能用namespace)
   System.Web.HttpContext 是不能放在using, 因為他是類別, 不是 namspace
   所以 Current.Session 要調整成 HttpContext.Current.Session
 
2. index或是key, value類的東西要用中括號 []
   VB:Session("name") --> C#:Session["name"]
   Cache(""), Application(""), DataRow("") 也是一樣
   
3. 所有方法都要加上 ()
   例如 ToString --> ToString()
   例如 ToLower --> ToLower()
 
4. 不能隱含式的型別轉換, 要明確
   轉換型態可以有以下方法
   - 轉字串時, 直接後面加上 .ToString()
   - Convert 物件轉換
   - 變數名稱前面加上(Type), 例如 (HashTable)Session["htData"]
   - 以 as 方式轉換, 若要轉換的物件可能是null建議用此方法, 例如 
     System.Net.HttpWebRequest http = System.Net.WebRequest.Create(Url) as System.Net.HttpWebRequest;
     string strData = HttpContext.Current.Cache["CacheName"] as string;
     用 as 方法不會強制轉換, 用 (Type) 或 ToString() 一旦遇到 null 會發生Exception
 
5. 帶參數的 Property C#是不允許的, .Net 會自動產生 get_ function 取代
   VB: UW.WU.URL --> C#: UW.WU.get_URL();
 
6. partial 要放在 public 後面
 
7. aspx頁面C#的檔頭要設定AutoEventWireup="true"
     另外所有的 server control 的 On Event 所執行的function name (例如 Button 的 OnClick)  都要在 aspx 裡面設定
   (這部分會在後台程式發生,因為轉換後常忘了加)
   <asp:DropDownList ID="ddlName" runat="server" AutoPostBack="true" 
      OnSelectedIndexChanged="ddlName_SelectedIndexChanged"></asp:DropDownList>
   <asp:Button ID="btnAdd" runat="server" Text="新增" OnClick="btnAdd_Click" />
 
8. 因為字串相加也是 +, 一些特殊寫法要注意
   VB: (Url & "Page=" & EndPage + 1)    --> VB會先將整數加好後再字串相加
   c#: (Url + "Page=" + (EndPage + 1))  --> 由於C#會先將1轉為字串再把所有字串相加 , 所以要先用括號包起來先讓整數相加

9. vbCrLf -> "\r\n"
    vbTab ->  "\t"

10. VB function 轉換 
    Conversion.Fix -> Math.Floor
     Strings.Format(x, "###0.0") -> 用 x.ToString("N1");

11. EN 處理要多加注意,需額外加 (int) 才會顯示數值,很多 sql 指令這樣拼要小心
" where EN_產品性質 = " + SHOPUNT.EN.產品性質.非成品 ; -> where EN_產品性質 = 非成品   (會出錯)
" where EN_產品性質 = " + (int)SHOPUNT.EN.產品性質.非成品; -> where EN_產品性質 = 100

先整理這些 以後遇到再加上


 
More...
darren, 2012/5/17 上午 10:50:34
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