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Posted by jpluimers on 2016/01/18
Still a great book. I love the chapter Threading in C# – Free E-book which you also can get as a PDF download.
It’s a chapter from C# 56/5/… in a Nutshell by Joseph Albahari. Great book!
Don’t forget to read these as well: Jon Skeet: Multi-threading in .NET: Introduction and suggestions (printable) Multi-threading in .NET: Introduction and suggestions (browseable)
--jeroen
Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, C# 6 (Roslyn), Development, Jon Skeet, Software Development, Visual Studio 2008, Visual Studio 2010, Visual Studio 2012, Visual Studio 2013, Visual Studio 2014, Visual Studio 2015, Visual Studio and tools | Leave a Comment »
Posted by jpluimers on 2015/12/15
Quite a while ago I learned about the clip.exe tool.
clip.exe is a nifty tool that allows you to copy console text output to the clipboard. Though shipping with Windows Server 2003, it wasn’t part of Windows XP, but as of Windows Vista it shipped on desktop versions of Windows.
Digging a bit deeper, I found out it was already part of the Windows NT 4 Resource Kit.
So I wrote PasteText:
PasteText: the reverse of clip.exe; pastes Clipboard.GetText() or Clipboard.GetFileDropList() to the standard output.
The full source code is below and in my repository.
There are many examples on the internet about Clipboard.GetText, but there is very little about Clipboard.GetFileDropList. Read the rest of this entry »
Posted in .NET, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 3.0, C# 4.0, C# 5.0, Development, Software Development, The Old New Thing, Windows Development | Leave a Comment »
Posted by jpluimers on 2015/11/25
Code Analysis in Visual Studio objects against using very generic exception types:
CA2201 Do not raise reserved exception types
‘BusinessClass<T>.StopProcessing()’ creates an exception of type ‘ApplicationException’, an exception type that is not sufficiently specific and should never be raised by user code. If this exception instance might be thrown, use a different exception type.
Company.Departement.Functionality BusinessClass.cs 157
Indeed ApplicationException and SystemException are bad (both mapping to also very generic COM HRESULT values COR_E_APPLICATION / -2146232832 / 0x80131600 and COR_E_SYSTEM / -2146233087 / 0x80131501).
Using InvalidOperationException is much nicer in this case. It still maps to a COM exception (in this case COR_E_INVALIDOPERATION / -2146233079 / 0x80131509).
–jeroen
Posted in .NET, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 3.0, C# 4.0, C# 5.0, C# 6 (Roslyn), Development, Software Development | Leave a Comment »
Posted by jpluimers on 2015/11/24
A while ago, I came across a class having (among other members) two methods named like this:
Within one of the other members of the class, I had to (temporarily) Stop processing, then Start it again.
But I couldn’t, as neither Start, nor Stop would make a record of the state it left the instance in.
Always ensure you know the state of an instance.
So I added the state, and tests to ensure a Stop/Start change was indeed not breaking things.
–jeroen
Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, C# 6 (Roslyn), Delphi, Delphi 10 Seattle, Delphi 2007, Delphi 2009, Delphi 2010, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, Software Development | 1 Comment »
Posted by jpluimers on 2015/11/04
From a chat with a co-worker a while ago:
So even if you expose such a property as read-only, it can still get its writeable fields overwritten.
That is a pain when those are part of the state of the underlying object.
In other words: encapsulate your state changes.
Here we solved it by making
Proper encapsulation.
In this case it was a project mixing C# and Delphi, but you can easily apply the above to any language featuring classes and properties.
Another solution would have been to extend the type of the property so it can expose an event that fires during change. Much more convoluted.
–jeroen
Posted in .NET, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, C# 6 (Roslyn), Delphi, Delphi 10 Seattle, Delphi 2007, Delphi 2009, Delphi 2010, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, Software Development | 2 Comments »
Posted by jpluimers on 2015/11/03
Lazy<T> is not constrained to static contexts.
Instance field initialisers cannot use instance references (but can use static references) as they run outside of the constructor.Though there are arguments for instance field initialisers too., I think this is a good reason to initialise fields inside the constructor: there you do have access to instance references (but should not call virtual instance methods or properties) which leads to another reason: consistency as field initialisers run in the opposite hierarchy order as constructors (incidentally causing this virtual method restriction).
Boy, that was a long sentence (:
–jeroen
via:
Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, C# 6 (Roslyn), Development, Software Development | Leave a Comment »
Posted by jpluimers on 2015/10/27
Today it is about the curse of
ORA-12560: TNS:protocol adapter error
Don’t you love the overly generic error messages you often get, especially from Oracle.
We log the additional information which doesn’t bring much help either:
Errors:Oracle.DataAccess.Client.OracleErrorCollection; Number: 12560
There is so much that can cause the Oracle 12560 error (including spurious SSL things), that it is often like searching for a needle in a haystack.
What in fact happened is that in a few of our .NET config files got empty ConnectionString attributes for Data Source, User Id and Password as this fragment shows:
connectionString=”Data Source=; User Id=; Password=;”
The cause was a parameter substitution step in our build process where we generate each config file based on templates. It failed on some of them as this simple grep query can reveal:
grep -ind connectionstring\=.*\=; *.config
grep -indl connectionstring\=.*\=; *.config
The first one shows the files and lines, the second one only the files.
So we now have some guarding in place that will prevent these attributes to become empty.
–jeroen
Posted in .NET, .NET 4.0, .NET 4.5, C#, C# 3.0, C# 4.0, C# 5.0, C# 6 (Roslyn), Database Development, Development, OracleDB, Software Development | Leave a Comment »
Posted by jpluimers on 2015/10/06
Get the path to the most recent msbuild.exe from the registry:
| @echo off | |
| :: http://stackoverflow.com/questions/328017/path-to-msbuild | |
| :: http://www.csharp411.com/where-to-find-msbuild-exe/ | |
| :: http://timrayburn.net/blog/visual-studio-2013-and-msbuild/ | |
| :: http://blogs.msdn.com/b/visualstudio/archive/2013/07/24/msbuild-is-now-part-of-visual-studio.aspx | |
| setlocal | |
| :vswhereModernTry | |
| :: https://github.com/Microsoft/vswhere/wiki/Find-MSBuild | |
| :: Normal output example of `vswhere -legacy -latest -property installationPath` has no trailing back-slash: | |
| :: `C:\Program Files (x86)\Microsoft Visual Studio 14.0\` | |
| for /f "usebackq tokens=*" %%i in (`vswhere -latest -products * -requires Microsoft.Component.MSBuild -property installationPath`) do ( | |
| set InstallDir=%%i | |
| ) | |
| :: without ENABLEEXTENSIONS, %InstallDir% is only available outside the above loop. | |
| for %%v in (15.0, 14.0) do ( | |
| if exist "%InstallDir%\MSBuild\%%v\Bin\MSBuild.exe" ( | |
| set msBuildExe="%InstallDir%\MSBuild\%%v\Bin\MSBuild.exe" | |
| goto :finish | |
| ) | |
| ) | |
| :manualTry | |
| :: order of the versions is important: get the most recent one | |
| for %%v in (14.0, 12.0, 4.0, 3.5, 2.0) do ( | |
| for /f "usebackq tokens=2* delims= " %%c in (`reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions\%%v" /v MSBuildToolsPath`) do ( | |
| set msBuildExe="%%dMSBuild.exe" | |
| goto :finish | |
| ) | |
| ) | |
| :vswhereLegacyTry | |
| :: -legacy is not compatible with -products or -requires | |
| :: note there is no Visual Studio 13.0 (just like there is no Office 13.0) likely because USA superstition. | |
| :: https://en.wikipedia.org/wiki/Microsoft_Visual_Studio#History | |
| :: msbuild was introduced in Visual Studio 8.0: https://en.wikipedia.org/wiki/MSBuild#History | |
| :: Legacy output example of `vswhere -legacy -latest -property installationPath` has trailing back-slash: | |
| :: `C:\Program Files (x86)\Microsoft Visual Studio 14.0\` | |
| for /f "usebackq tokens=*" %%i in (`vswhere -legacy -latest -property installationPath`) do ( | |
| set InstallDir=%%i | |
| ) | |
| :: without ENABLEEXTENSIONS, %InstallDir% is only available outside the above loop. | |
| for %%v in (14.0, 12.0, 11.0, 10.0, 9.0, 8.0) do ( | |
| if exist "%InstallDir%MSBuild\%%v\Bin\MSBuild.exe" ( | |
| set msBuildExe="%InstallDir%MSBuild\%%v\Bin\MSBuild.exe" | |
| goto :finish | |
| ) | |
| ) | |
| :: nothing found | |
| :finish | |
| endlocal & if not [%msBuildExe%]==[] if exist %msBuildExe% ( echo %msBuildExe% ) |
| for /f "usebackq tokens=*" %%c in (`"%~dp0get-msbuildExe-path.bat"`) do ( | |
| call %%c %* | |
| ) |
With help from:
This needs adoption for Visual Studio 2017 (15.0) and up; see the comments at the above gist:
–jeroen
Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, C# 6 (Roslyn), Delphi, Delphi 10 Seattle, Delphi 2007, Delphi 2009, Delphi 2010, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, Software Development | Leave a Comment »
Posted by jpluimers on 2015/09/28
I’ve seen this question coming up a few times, and bumped into this at a client recently: the UAC dialog coming up when debugging a 32-bit executable.
This is caused (more details below) by Installer Detection Technology introduced in Windows Vista (with UAC) and tightened in more modern Windows versions.
The solution is to either:
For software you don’t have source code for, you can alter the manifest with a requestedExecutionLevel element: Fixing the way Vista Auto-detects Installers – Ben’s Writing.
A few links on Installer Detection Technology in Windows:
Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, .NET CF, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, C# 6 (Roslyn), Delphi, Delphi 10 Seattle, Delphi 2, Delphi 2005, Delphi 2006, Delphi 2007, Delphi 2009, Delphi 2010, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Delphi 7, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, RemObjects C#, Software Development | 1 Comment »
Posted by jpluimers on 2015/09/23
Visual Studio 2013 syntax highlighting: watch the closing curly brace.
Console.WriteLine(“URL IS : http://localhost/:{0}”, portnumber);
–jeroen
Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Software Development, Visual Studio 2013, Visual Studio and tools | Leave a Comment »
The Wiert Corner - irregular stream of stuff 
lextm commented on Mar 9, 2017 •
vswhereis now recommended to locate MSBuild 15,https://github.com/Microsoft/vswhere
n9 commented on May 17, 2017
vswhere -products *to get standalone installation of BuildTools. (See Microsoft/vswhere#61.)