今天發生一個SQL奇怪的現象，記錄一下
就是訂單列表(使用分頁的SQL 找出 top 20)跑很久才出來，大約10多秒 
SQL指令條件僅有訂單日期(預設是1年內訂單，訂單總數有130萬筆)，而訂單日期也有做index
之前都大約1~2秒就出來，這一兩天卻要10秒才跑出來

用執行計畫評估功能查也看不出哪裡有問題，把一些子查詢拿掉也沒有改善
所以就改一下搜尋條件，改搜尋半年內訂單，大約 5秒
改搜尋兩年內訂單，1秒!!! 真是神奇，把條件區間拉大反而很快???????
直覺上覺得索引table是不是太大太亂了，剛好看到CreateDate索引有個重建按鈕
就勇敢把他按下去，想說會不會跑很久，結果重建只要不到1秒就好了
然後神奇的事發生了，訂單列表不須一秒就顯示出來啦!

SQL 指令大概長這樣

Select * from (

Select Top 20 * from (

select Top 20 a.*

--, CompelteOrderId= (select top 1 K.Id from packing_list_main k With(NoLock) join Order_Main p With(NoLock) on k.Order_Id=p.Id where k.En_Packing_List_Status=300 and P.MEmber_Id=a.Member_Id )

--, [MemoCount_前台問題] = (Select COUNT(*) from Order_Memo With(NoLock) where Order_Memo.Order_Id = a.Id and Memo_Type = 1)

--, [MemoCount_業務備註] = (Select COUNT(*) from Order_Memo With(NoLock) where Order_Memo.Order_Id = a.Id and Memo_Type = 3)

--, [MemoCount_系統檢查] = (Select COUNT(*) from Order_Memo With(NoLock) where Order_Memo.Order_Id = a.Id and Memo_Type = 4)

--, QnACount = (select count(*) from Order_QnA With(NoLock) where Order_Id = a.Id)

from V_Order_Main_For_Admin_List a With(NoLock) left join Member b with(NoLock) on a.Member_Id=b.Id where (1=1) and En_Order_Status <> -300 and a.Create_Date >='2018-06-20' order by Id Desc

) AS T1 order by Id

) AS T2 order by Id Desc

參考 will will web 的舊文章，原來定期把索引整理整理，也是要記得做的。
不過週期上我想 1季或半年跑一次應該就可以了
-------------------------------------------------------------------
後記: 2020/6/22 -  一年後又發生一樣的狀況，真是神奇
這次 OrderMain CreateDate 沒有很分散。只有 2.X %
想說其他 index 是不是該重建，但是都沒有效果
最後只好重建 CreateDate --> 結果居然解決了

看 2021年會在發生嗎?

 

使用範例如下:

    void getList()

    {

        var Q = TN.Admin.TCatOrderDeliveryRecord.Select().OrderBy("DeliveryCompletion_Date, Id Desc");



        if (U2.WU.IsNonEmptyFromQueryStringOrForm("OD00"))

        {

            Q.And("OD00 = ", U2.WU.GetValue("OD00"));

        }



        if (U2.WU.V.StartDate_IsOK)

        {

            Q.And("DeliveryCompletion_Date >= ", U2.WU.V.StartDate);

        }



        if (U2.WU.V.EndDate_IsOK)

        {

            Q.And("DeliveryCompletion_Date < ", U2.WU.V.EndDate);

        }



        U2.JSON.WriteSuccessData(Q.GetPageDT2(U2.WU.V.CurrentPage, U2.WU.V.PageSize));

    }

過去都是使用 jquery lazy load js 來實作延遲載圖，
其運作原理是偵測scroll事件以及img物件的相對位置來決定要不要load圖片

現在有更簡單的方式，就是用 IntersectionObserver API 這個 Web標準
來偵測 img 物件是不是進入可視 webview 範圍
https://developers.google.com/web/updates/2016/04/intersectionobserver

document.addEventListener("DOMContentLoaded", function() {

var lazyImages = [].slice.call(document.querySelectorAll("img.lazy"));;



if ("IntersectionObserver" in window && "IntersectionObserverEntry" in window && "intersectionRatio" in window.IntersectionObserverEntry.prototype) {

    let lazyImageObserver = new IntersectionObserver(function(entries, observer) {

     entries.forEach(function(entry) {

        if (entry.isIntersecting) {

         let lazyImage = entry.target;

         lazyImage.src = lazyImage.dataset.src;

         lazyImage.srcset = lazyImage.dataset.srcset;

         lazyImage.classList.remove("lazy");

         lazyImageObserver.unobserve(lazyImage);

        }

     });

    });



    lazyImages.forEach(function(lazyImage) {

     lazyImageObserver.observe(lazyImage);

    });

}

//這裡可以加上else處理萬一瀏覽器不支援的狀況

});

網頁裡面只要用  <img data-src='圖片網址' class='lazy' />  就可以啦

IntersectionObserver API
目前 Can I Use 網站顯示大部分 browser 都支援，iOS safari 要 12.2 版才支援
應該可以放心使用


 

抓出每個 Block_Id 中, End_Date 最小的資料.

語法 A:
With TempBlock as (
Select *, 
ROW_NUMBER() OVER(PARTITION BY B.Block_Id ORDER BY B.End_Date, B.Id) AS rk 
from BlockData B Where IsDelete = 'N' and End_Date >= getDate())
Select * from TempBlock Where rk = 1

語法 B:
Select * from (
Select *, 
ROW_NUMBER() OVER(PARTITION BY B.Block_Id ORDER BY B.End_Date, B.Id) AS rk 
from BlockData B Where IsDelete = 'N' and End_Date >= getDate()) TempBlock 
Where rk = 1

LINE Pay款流程： 
reserve Page(紅科) 發送 reserve API => 取得 payment URL => 轉址到 payment URL => LINE Pay 檢查USER狀態 => 轉回confirm page(紅科), 發送 confirm API => DOWN.

付款需要程式： 
reserve API, confirm API:

send request JSON and read return JSON:
C#: 

using System.Net;

using System.IO;



public partial class TEST : System.Web.UI.Page

{

    DB.OrderMain oOrderObj = null;

    protected void Page_Load(object sender, EventArgs e)

    {

        //Setting request header

        HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("__APIRootURL__");

        httpWebRequest.ContentType = "application/json; charset=UTF-8";

        httpWebRequest.Method = "POST";

        httpWebRequest.Headers.Add("X-LINE-ChannelId", DB.SysConfig.LINEPay.ChannelId);

        httpWebRequest.Headers.Add("X-LINE-ChannelSecret", DB.SysConfig.LINEPay.SecretKey);



        //加入參數

        using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))

        {

            string requestJSON = "{\"productName\": \"" + DB.SysConfig.SYSTEM_NAME + "\"," +

                                "\"productImageUrl\": \"" + DB.SysConfig.URL_Shopping + "images/Logo.jpg\"," +

                                "\"amount\": " + oOrderObj.TotalAmount() + "," +

                                "\"currency\": \"TWD\"," +

                                "\"orderId\": \"" + oOrderObj.DisplayOrderId + "\"," +

                                "\"confirmUrl\": \"" + DB.SysConfig.URL_Shopping + "Handler/LinePay/GotoComfirm.aspx?Id=" + oOrderObj.Id + "\"," +

                                "\"cancelUrl\": \"" + DB.SysConfig.URL_Shopping + "Shopping/OrderComplete.aspx?Id=" + oOrderObj.Id + "\"," +

                                "\"capture\": \"true\"," +

                                "\"confirmUrlType\": \"CLIENT\"}";



            streamWriter.Write(requestJSON);

            streamWriter.Flush();

            streamWriter.Close();

        }



        //取得回覆資訊

        var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();

        //解讀回覆資訊

        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))

        {

            var responseJSON = streamReader.ReadToEnd();

            //將 JSON 轉為物件

            GN.LinePay.reserveRes.ReturnJSON oReturnObj = (GN.LinePay.reserveRes.ReturnJSON)Newtonsoft.Json.JsonConvert.DeserializeObject(responseJSON, typeof(GN.LinePay.reserveRes.ReturnJSON));



            if (oReturnObj.returnCode == "0000")

            {

                //成功

            }

            else

            {

                //失敗

                string ErrMsg = "Error Code: " + oReturnObj.returnCode + "\r\n" + oReturnObj.returnMessage;

            }

        }

    }

}

.vb

Imports System.Net

Imports System.IO



Partial Class TEST

    Inherits System.Web.UI.Page



    Dim oOrderObj As DB.OrderMain

    Private Sub Admin_TEST_Load(sender As Object, e As EventArgs) Handles Me.Load

        'Setting request header

        Dim httpWebRequest As HttpWebRequest = WebRequest.Create("__APIRootURL__")

        httpWebRequest.ContentType = "application/json; charset=UTF-8"

        httpWebRequest.Method = "POST"

        httpWebRequest.Headers.Add("X-LINE-ChannelId", DB.SysConfig.LINEPay.ChannelId)

        httpWebRequest.Headers.Add("X-LINE-ChannelSecret", DB.SysConfig.LINEPay.SecretKey)

        '加入參數

        Using streamWriter As New StreamWriter(httpWebRequest.GetRequestStream())

            Dim requestJSON As String = "{""productName"": """ + DB.SysConfig.SYSTEM_NAME + """," +

                                        """productImageUrl"": """ + DB.SysConfig.URL_Shopping + "images/Logo.jpg""," +

                                        """amount"": " + oOrderObj.TotalAmount() + "," +

                                        """currency"": ""TWD""," +

                                        """orderId"": """ + oOrderObj.DisplayOrderId + """," +

                                        """confirmUrl"": """ + DB.SysConfig.URL_Shopping + "Handler/LinePay/GotoComfirm.aspx?Id=" + oOrderObj.Id + """," +

                                        """cancelUrl"": """ + DB.SysConfig.URL_Shopping + "Shopping/OrderComplete.aspx?Id=" + oOrderObj.Id + """," +

                                        """capture"": ""true""," +

                                        """confirmUrlType"": ""CLIENT""}"



            streamWriter.Write(requestJSON)

            streamWriter.Flush()

            streamWriter.Close()

        End Using

        '取得回覆資訊

        Dim httpResponse As HttpWebResponse = httpWebRequest.GetResponse

        '解讀回覆資訊

        Using streamReader As New StreamReader(httpResponse.GetResponseStream())

            Dim responseJSON As String = streamReader.ReadToEnd()

            '將 JSON 轉為物件

            Dim oReturnObj As GN.LinePay.reserveRes.ReturnJSON = Newtonsoft.Json.JsonConvert.DeserializeObject(responseJSON, GetType(GN.LinePay.reserveRes.ReturnJSON))



            Dim ResMsg As String = ""

            If oReturnObj.returnCode = "0000" Then

                '成功



            Else

                '失敗

            End If

        End Using

    End Sub

End Class

工具網站：
JSON 轉物件 http://json2csharp.com/
C# to VB : http://converter.telerik.com/



#專案： 紅科

有時SVN資料夾檔案，簽入簽出會出錯，然後就完全不能用了
跑 cleanup之後，會出現這樣的訊息

Command: Update Error: Previous operation has not finished; run 'cleanup' if it was interrupted Error: Please execute the 'Cleanup' command. Completed!:

其實是SVN有個工作執行沒有結束，若要 kill 掉這個工作，就要使用 sqlite 工具
(SVN 是以 sqlite 來儲存資料)
1. 要下載 sqlite3.exe 主程式放在 SVN root 目錄下
2. 開啟 cmd, 執行 ​ sqlite3.exe .svn/wc.db "select * from work_queue"
3.刪除 work queue qlite3.exe .svn/wc.db "delete from work_queue"
​4. 把 SVN root 下的 sqlite3.exe 移走

寫一下, 以備不時之需, Codepage 和 Name 可以用來取得 encoding.
CodePage, DisplayName, Name
37, IBM EBCDIC (美國-加拿大), IBM037
437, OEM 美國, IBM437
500, IBM EBCDIC (國際), IBM500
708, 阿拉伯文 (ASMO 708), ASMO-708
720, 阿拉伯文 (DOS), DOS-720
737, 希臘文 (DOS), ibm737
775, 波羅的海文 (DOS), ibm775
850, 西歐語系 (DOS), ibm850
852, 中歐語系 (DOS), ibm852
855, OEM 斯拉夫文, IBM855
857, 土耳其文 (DOS), ibm857
858, OEM 多語系拉丁文 I, IBM00858
860, 葡萄牙文 (DOS), IBM860
861, 冰島文 (DOS), ibm861
862, 希伯來文 (DOS), DOS-862
863, 加拿大法文 (DOS), IBM863
864, 阿拉伯文 (864), IBM864
865, 北歐字母 (DOS), IBM865
866, 斯拉夫文 (DOS), cp866
869, 希臘文，現代 (DOS), ibm869
870, IBM EBCDIC (多語系拉丁文 2), IBM870
874, 泰文 (Windows), windows-874
875, IBM EBCDIC (希臘現代), cp875
932, 日文 (Shift-JIS), shift_jis
936, 簡體中文 (GB2312), gb2312
949, 韓文, ks_c_5601-1987
950, 繁體中文 (Big5), big5
1026, IBM EBCDIC (土耳其拉丁文 5), IBM1026
1047, IBM 拉丁文 1, IBM01047
1140, IBM EBCDIC (美國-加拿大-歐洲), IBM01140
1141, IBM EBCDIC (德國-歐洲), IBM01141
1142, IBM EBCDIC (丹麥-挪威-歐洲), IBM01142
1143, IBM EBCDIC (芬蘭-瑞典-歐洲), IBM01143
1144, IBM EBCDIC (義大利-歐洲), IBM01144
1145, IBM EBCDIC (西班牙-歐洲), IBM01145
1146, IBM EBCDIC (英國-歐洲), IBM01146
1147, IBM EBCDIC (法國-歐洲), IBM01147
1148, IBM EBCDIC (國際-歐洲), IBM01148
1149, IBM EBCDIC (冰島-歐洲), IBM01149
1200, Unicode, utf-16
1201, Unicode (位元組由大到小), utf-16BE
1250, 中歐語系 (Windows), windows-1250
1251, 斯拉夫文 (Windows), windows-1251
1252, 西歐語系 (Windows), Windows-1252
1253, 希臘文 (Windows), windows-1253
1254, 土耳其文 (Windows), windows-1254
1255, 希伯來文 (Windows), windows-1255
1256, 阿拉伯文 (Windows), windows-1256
1257, 波羅的海文 (Windows), windows-1257
1258, 越南文 (Windows), windows-1258
1361, 韓文 (Johab), Johab
10000, 西歐語系 (Mac), macintosh
10001, 日文 (Mac), x-mac-japanese
10002, 繁體中文 (Mac), x-mac-chinesetrad
10003, 韓文 (Mac), x-mac-korean
10004, 阿拉伯文 (Mac), x-mac-arabic
10005, 希伯來文 (Mac), x-mac-hebrew
10006, 希臘文 (Mac), x-mac-greek
10007, 斯拉夫文 (Mac), x-mac-cyrillic
10008, 簡體中文 (Mac), x-mac-chinesesimp
10010, 羅馬尼亞文 (Mac), x-mac-romanian
10017, 烏克蘭文 (Mac), x-mac-ukrainian
10021, 泰文 (Mac), x-mac-thai
10029, 中歐語系 (Mac), x-mac-ce
10079, 冰島文 (Mac), x-mac-icelandic
10081, 土耳其文 (Mac), x-mac-turkish
10082, 克羅埃西亞文 (Mac), x-mac-croatian
12000, Unicode (UTF-32), utf-32
12001, Unicode (UTF-32 位元組由大到小), utf-32BE
20000, 繁體中文 (CNS), x-Chinese-CNS
20001, TCA 台灣, x-cp20001
20002, 繁體中文 (Eten), x-Chinese-Eten
20003, IBM5550 台灣, x-cp20003
20004, TeleText 台灣, x-cp20004
20005, Wang 台灣, x-cp20005
20105, 西歐語系 (IA5), x-IA5
20106, 德文 (IA5), x-IA5-German
20107, 瑞典文 (IA5), x-IA5-Swedish
20108, 挪威文 (IA5), x-IA5-Norwegian
20127, US-ASCII, us-ascii
20261, T.61, x-cp20261
20269, ISO-6937, x-cp20269
20273, IBM EBCDIC (德國), IBM273
20277, IBM EBCDIC (丹麥-挪威), IBM277
20278, IBM EBCDIC (芬蘭-瑞典), IBM278
20280, IBM EBCDIC (義大利), IBM280
20284, IBM EBCDIC (西班牙), IBM284
20285, IBM EBCDIC (UK), IBM285
20290, IBM EBCDIC (日文片假名), IBM290
20297, IBM EBCDIC (法國), IBM297
20420, IBM EBCDIC (阿拉伯文), IBM420
20423, IBM EBCDIC (希臘文), IBM423
20424, IBM EBCDIC (希伯來文), IBM424
20833, IBM EBCDIC (韓文擴充), x-EBCDIC-KoreanExtended
20838, IBM EBCDIC (泰國), IBM-Thai
20866, 斯拉夫文 (KOI8-R), koi8-r
20871, IBM EBCDIC (冰島), IBM871
20880, IBM EBCDIC (斯拉夫俄文), IBM880
20905, IBM EBCDIC (土耳其), IBM905
20924, IBM 拉丁文 1, IBM00924
20932, 日文 (JIS 0208-1990 和 0212-1990), EUC-JP
20936, 簡體中文 (GB2312-80), x-cp20936
20949, 韓文 Wansung, x-cp20949
21025, IBM EBCDIC (斯拉夫塞爾維亞文-保加利亞文), cp1025
21866, 斯拉夫文 (KOI8-U), koi8-u
28591, 西歐語系 (ISO), iso-8859-1
28592, 中歐語系 (ISO), iso-8859-2
28593, 拉丁文 3 (ISO), iso-8859-3
28594, 波羅的海文 (ISO), iso-8859-4
28595, 斯拉夫文 (ISO), iso-8859-5
28596, 阿拉伯文 (ISO), iso-8859-6
28597, 希臘文 (ISO), iso-8859-7
28598, 希伯來文 (ISO-Visual), iso-8859-8
28599, 土耳其文 (ISO), iso-8859-9
28603, 愛沙尼亞文 (ISO), iso-8859-13
28605, 拉丁文 9 (ISO), iso-8859-15
29001, 歐洲, x-Europa
38598, 希伯來文 (ISO-Logical), iso-8859-8-i
50220, 日文 (JIS), iso-2022-jp
50221, 日文 (JIS-Allow 1 byte Kana), csISO2022JP
50222, 日文 (JIS-Allow 1 byte Kana - SO/SI), iso-2022-jp
50225, 韓文 (ISO), iso-2022-kr
50227, 簡體中文 (ISO-2022), x-cp50227
51932, 日文 (EUC), euc-jp
51936, 簡體中文 (EUC), EUC-CN
51949, 韓文 (EUC), euc-kr
52936, 簡體中文 (HZ), hz-gb-2312
54936, 簡體中文 (GB18030), GB18030
57002, ISCII 梵文語系, x-iscii-de
57003, ISCII 孟加拉文, x-iscii-be
57004, ISCII 坦米爾文, x-iscii-ta
57005, ISCII 特拉古文, x-iscii-te
57006, ISCII 阿薩姆文, x-iscii-as
57007, ISCII 歐利亞文, x-iscii-or
57008, ISCII 坎那達文, x-iscii-ka
57009, ISCII 馬來亞拉姆文, x-iscii-ma
57010, ISCII 古吉拉特文, x-iscii-gu
57011, ISCII 旁遮普語, x-iscii-pa
65000, Unicode (UTF-7), utf-7
65001, Unicode (UTF-8), utf-8

有時候用 jQuery 使用 event 物件時，會發現有些特殊事件的 property 抓不到 (undefined)
例如
mousewheel --> event.wheelDelta 
drop --> event.dataTransfer
touchstart --> event.touches[0].pageX
原因是 jQuery 的 event 只會包裝一般的屬性，特別的屬性要使用 event.originalEvent 去抓
event.originalEvent 是瀏覽器原生的 event

It's also important to note that the event object contains a property called originalEvent, which is the event object that the browser itself created. jQuery wraps this native event object with some useful methods and properties, but in some instances, you'll need to access the original event via event.originalEvent for instance. This is especially useful for touch events on mobile devices and tablets.

所以開發時當有些特殊屬性抓不到時，可以考慮用 event.originalEvent 去抓看看

    // 這是用滾輪放大縮小圖片 (此範例firefox不支援)

    $("#imgProductBig").bind("mousewheel", function (ev) {

        var delta = ev.originalEvent.wheelDelta > 0 ? 1 : -1;

        if (delta > 0 && zoomValue < 150) {

            zoomValue += 10;

        }

        else if (delta < 0 && zoomValue > 50) {

            zoomValue -= 10;

        }

        $(this).css("zoom", zoomValue + '%');

        return false;

    });

 

又發現新說法

我們在 front-end 做 scroll event的監聽的時候很常會過度的觸發要執行的事情，因此導致效能不太佳，
我們需要的是固定頻率執行某個function ， 這個原來叫 throttle

另外一種狀況像是autocomplete，不需要每一個keyup 都去ajax 去backend 抓資料回來，所以我們過去，
設一個變數去記住setTimeout 回傳回來的數字，如果下一次的keyup 發生在預設的時間內就去把 setTimeout清掉。
原來這種做法，有一個稱呼叫 debounce

不過jQuery 沒有內建這兩個function。這樣在複雜的 js 中增加易讀性。

http://lifeofageekadmin.com/fixing-windows-2008-r2-activation-errors/

​Location is at C:\windows\system32\Slmgr.vbs
/ckms = clear all KMS servers in cache and set to auto discover
/skms :  = Specify a KMS host server
/ipk  = Enter in a new license key
/ato = Activate the new key
/dlv = Display license information
First open a command prompt and try to register a license key. This example is for Windows 2008 R2 Enterprise Edition.
C:\> Cd c:\windows\system32
C:\Windows\system32>cscript slmgr.vbs /ipk
C:\Windows\system32>cscript slmgr.vbs /ato
If you receive activation successful you are complete. If you receive a 0xC004F074 error do the following.
C:\> Cd c:\windows\system32
C:\Windows\system32>cscript slmgr.vbs /ckms
C:\Windows\system32>cscript slmgr.vbs /ipk
C:\Windows\system32>cscript slmgr.vbs /ato
If you receive activation successful you are complete. If you receive a 0xC004F074 error again or another error do the following.
C:\> Cd c:\windows\system32
C:\Windows\system32>cscript slmgr.vbs /rilc
Reboot
C:\> Cd c:\windows\system32
C:\Windows\system32>cscript slmgr.vbs /ckms
C:\Windows\system32>cscript slmgr.vbs /ipk
C:\Windows\system32>cscript slmgr.vbs /ato
More information can be found at Configuring KMS Clients