Random rand = new Random(Guid.NewGuid().GetHashCode());



            List<int> listLinq = new List<int>(Enumerable.Range(0, dt.Rows.Count - 1));

            listLinq = listLinq.OrderBy(num => rand.Next()).ToList<int>();

參考:

https://dotblogs.com.tw/flweblab/2017/11/21/104209

程式碼 1:

        foreach (DataRow oRow in DT.Rows)

        {

            var oSP = new DB.StorePointRecord(oRow);

            :

            :

        }

程式碼 2:

        var oSP = new DB.StorePointRecord();

        foreach (DataRow oRow in DT.Rows)

        {

            oSP.row = oRow;

            :

            :

        }

https://stackoverflow.com/questions/628565/display-lines-number-in-stack-trace-for-net-assembly-in-release-mode/628590#628590

1. Go into the Properties window for the project where you want to see stack trace line numbers.
2. Click on the Build "vertical tab".
3. Select "Release" configuration. Check the DEBUG constant parameter.
4. Uncheck the "Optimize code" parameter to avoid the occasional trace issue with inlined code (this step is not essential).
5. Press the Advanced... button and choose Output -> Debug Info -> pdb-only.
6. Deploy the generated .pdb file with the assembly.

 
 
 

以前年輕不懂事, 寫了一些很遜的程式碼, 例如:

舊的程式碼:

        public static DataTable DTFromSQL(string Sql, string DBC = null, Int32 timeout = 0)

        {

            SqlDataAdapter DA = new SqlDataAdapter(Sql, GetDBC(DBC));



            DataTable DT = new DataTable();

            try

            {

                DA = new SqlDataAdapter(Sql, DBC);

                if (timeout > 0)

                {

                    DA.SelectCommand.CommandTimeout = timeout;

                }



                DA.Fill(DT);

            }

            catch (Exception ex)

            {

                throw new Exception(ex.ToString());

            }

            finally

            {

                DA.Dispose();

            }



            return DT;

        }

新的程式碼:

        public static DataTable DTFromSQL(string Sql, string DBC = null, Int32 timeout = 30)

        {

            using (var DA = new SqlDataAdapter(Sql, GetDBC(DBC)))

            {

                //不可為 null

                DataTable DT = new DataTable();



                DA.SelectCommand.CommandTimeout = timeout;



                DA.Fill(DT);



                return DT;

            }

        }

可以參考:
https://dotblogs.com.tw/yc421206/archive/2012/01/03/64154.aspx
 

試分析以下兩個 function..

        public static void WriteText1(string FileName, List<string> ltData)

        {

            foreach(string data in ltData)

            {

                System.IO.File.AppendAllText(FileName, data);

            }

        }



        public static void WriteText2(string FileName, List<string> ltData)

        {

            var Res = "";

            foreach (string data in ltData)

            {

                Res += data;

            }



            System.IO.File.WriteAllText(FileName, Res);

        }

https://www.techrepublic.com/article/working-with-the-aspnet-globalasax-file/

Application_BeginRequest
Application_AuthenticateRequest
Application_AuthorizeRequest
Application_ResolveRequestCache
Application_AcquireRequestState
Application_PreRequestHandlerExecute
Application_PreSendRequestHeaders
Application_PreSendRequestContent
<<code is executed>>
Application_PostRequestHandlerExecute
Application_ReleaseRequestState
Application_UpdateRequestCache
Application_EndRequest

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

Visual Studio 預設發佈的模式是不包括錯誤行號的. 要開啟在這裡設定:



還有 option 要設定:

 
 

想到的先列出來.

1. 幫 String 擴充屬性(javascript, .NET)
2. SQL Injection.
3. Cross Site Script Attack.
4. 避免排程未完全執行以及重覆執行.
5. 更新 Cache 與 Lock.
6. SQL Transaction.
 

lock 的 object 和 cachename 最好是相關的.

ex: lock (S3.LockObjs.GetLockerObject(CacheName))

內容後補..