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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘.NET’ Category

How to secure memory? – Medo’s Home Page

Posted by jpluimers on 2017/03/15

Sometime you might want to protect your data in memory – the greatest example is when dealing with anything related to passwords. It is simply not smart to keep that data around in a plain-text. In .NET there are multiple methods you can use for this purpose, starting with SecureString, ProtectedMemory, and my favorite ProtectedData.…

Source: How to secure memory? – Medo’s Home Page

via: Found this via +Ilya S a post from +Josip Medved – Stuff like this should be way built into an OS, and RTL’s should have a secureMalloc()… – Joe C. Hecht – Google+

–jeroen

 

Posted in .NET, .NET 4.0, .NET 4.5, C#, C# 4.0, C# 5.0, C# 6 (Roslyn), Development, Software Development | Leave a Comment »

Windows 10 – language neutral batch file to start Windows

Posted by jpluimers on 2017/02/22

A while ago, I bitched that Microsoft moved away the Windows Update out of the Control panel into a language depended place (in Windows 10 1511 update broke the Hyper-V networking – Fix network connection issues).

Since then I had to maintain too many locales running Windows 10. So here is the batch file:

for /f "delims=" %%A in ('PowerShell -Command "(Get-Culture).Name"') do explorer "%LocalAppData%\Packages\windows.immersivecontrolpanel_cw5n1h2txyewy\LocalState\Indexed\Settings\%%A\AAA_SystemSettings_MusUpdate_UpdateActionButton.settingcontent-ms"

It uses these tricks:

  1. Set output of a command as a variable (in this case a for loop variable)
  2. Execute PowerShell script in a .bat file
  3. PowerShell Get-Culture (which gets a .NET CultureInfo instance)
  4. CultureInfo.Name property (which has the nl-NL, en-US, etc codes in it)

It replaced this simple batch-file which has worked for like 10 years:

%windir%\System32\rundll32.exe url.dll,FileProtocolHandler wuapp.exe

–jeroen

via: Windows Update Shortcut – Create in Windows 10 – Windows 10 Forums

Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, Batch-Files, CommandLine, Development, Power User, PowerShell, Scripting, Software Development, Windows, Windows 10 | Leave a Comment »

Delphi and stuff: The strange limitation of 64 threads

Posted by jpluimers on 2017/02/21

… there’s no need to use WaitForMultipleObjects in Step 2. It’s fairly easy to keep a counter of active threads in the pool (interlocked-incremented when a thread starts, interlocked-decremented when a thread is finished). When the counter reaches zero (no more active threads), signal an event. With only one event to wait for, you can use WaitForSingleObject

So no more 64-thread (MAXIMUM_WAIT_OBJECTS) limits for pools…

Source: Delphi and stuff: The strange limitation of 64 threads

–jeroen

Posted in .NET, Delphi, Development, Power User, Software Development, Windows | Leave a Comment »

Date format converter from Text or Unix/Mac/Filetime/Microsoft to virtually any readable form

Posted by jpluimers on 2017/02/09

Brilliant Date format converter from dates in Text (almost any format) or timestamp numbers in Unix, Mac, Filetime or Microsoft (which is the same as Delphi TDateTime) format to any of these formats:

Text Date:
Date in human-readable text
Wednesday, March 23, 2016 4:05:39pm
RFC 822:
RFC 822 formatted date
Wed, 23 Mar 2016 16:05:39 +0000
ISO 8601:
ISO 8601 formatted date
2016-03-23T16:05:39+00:00
UNIX Timestamp:
seconds since Jan 1 1970
1458749139
Mac Timestamp:
seconds since Jan 1 1904
3541593939
Microsoft Timestamp:
days since Dec 31 1899
42452.670590278
FILETIME:
100-nanoseconds since Jan 1 1601
131032227390000000
01D1851D:D7B58B80

Source: Date format converter

–jeroen

Posted in *nix, .NET, Apple, Delphi, Development, Mac, OS X, Power User, Software Development | 1 Comment »

An exponential back-off implementation I used somewhere; probably room for improvement, but it works good enough.

Posted by jpluimers on 2017/01/17

I will probably need this again somewhere in the future: An exponential back-off implementation I used somewhere; probably room for improvement, but it works good enough.

It’s Delphi, but I’ve not seen practical implementations in C# either.

(the updated version thanks to Anders Melander).

–jeroen

Posted in .NET, C#, Delphi, Development, Software Development | 5 Comments »

 
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