The Wiert Corner – irregular stream of stuff

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

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Archive for the ‘Software Development’ Category

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“Cannot navigate to definition” annoyance in Visual Studio 2010 – (did it implement the mouse equivalent to Delphi code browsing? No, it didn’t)

Posted by jpluimers on 2012/03/08

This use case drove me nuts in Visual Studio 2010 for a while, but can be solved.

Use cases:

  1. Cannot navigate to definition.double click on a word to select it
  2. press Ctrl-C to copy the selected text
  3. result is either of these two dialogs:

    ---------------------------
    Microsoft Visual Studio
    ---------------------------
    Cannot navigate to definition.
    ---------------------------
    OK
    ---------------------------

    Cannot navigate to definition. The cursor is not on a symbol.or

    ---------------------------
    Microsoft Visual Studio
    ---------------------------
    Cannot navigate to definition. The cursor is not on a symbol.
    ---------------------------
    OK
    ---------------------------

The reason is that Visual Studio 2010 still thinks I am clicking the identifier (which I’m not, I just released the mouse button) while pressing the Ctrl key. Read the rest of this entry »

Posted in .NET, Delphi, Development, Keyboards and Keyboard Shortcuts, Power User, Software Development, Visual Studio 2010, Visual Studio and tools | Leave a Comment »

Eric Lippert’s comment and answer explaining nullable operator lifting (c# – Why does the == operator work for Nullable when == is not defined? – Stack Overflow)

Posted by jpluimers on 2012/03/07

It seems I’m not the ony one who watches what Eric Lippert writes closely.

Eric works at the C# team at Microsoft (since 1996, which is about the time Anders Hejlsberg joined Microsoft).

Unlike Anders, Eric is much more visible. I regularly read his blog, and watch his StackOverflow.com contributions (RSS feed) on a regular base.

Recently, he posted a awesome comment “Nullable is nothing but magic” on a the question “C# – Why does the == operator work for Nullable when == is not defined?“, together with a very concise answer explaining that in C# most operators are ‘lifted to nullable’.

Note his tiny – but important – mention that for == VB.net behaves different than C#.

Note that Eric is very productive, he usually contributes to StackOverflow.com multiple times a day, sometimes with material that (at least for me <g>) need a while before I really get the point.

Recommended reading :)

–jeroen

via: c# – Why does the == operator work for Nullable when == is not defined? – Stack Overflow.

Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, Development, Software Development, VB.NET | Leave a Comment »

Anyone with a C#, Delphi or FreePascal implementation of the PRESENT Ultra-Lightweight Block Cipher encryption?

Posted by jpluimers on 2012/03/06

A short while ago a paper got published on PRESENT: An Ultra-Lightweight Block Cipher by Andrey Bogdanov et al becoming ISO standard 29192-2:2012.

Is there anyone that has a C#, Delphi or FreePascal implementation with unit tests?

–jeroen

Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Delphi, Development, Software Development | 13 Comments »

Windows 8 Consumer Preview ISO formats: Microsoft, please do this the same for Visual Studio 11 (#VS11 #W8)

Posted by jpluimers on 2012/03/02

Hopefully they will add Visual Studio 2011 ISOs (no, not the current ones that still download the prerequisites in the background) like they did with the Windows 8 Consumer Preview ISOs:

English

64-bit (x64) Download (3.3 GB) Sha 1 hash — 1288519C5035BCAC83CBFA23A33038CCF5522749
32-bit (x86) Download (2.5 GB) Sha 1 hash — E91ED665B01A46F4344C36D9D88C8BF78E9A1B39
Product Key DNJXJ-7XBW8-2378T-X22TX-BKG7J

–jeroen

via: Windows 8 Consumer Preview ISO formats.

Posted in .NET, Development, Power User, Software Development, Visual Studio 11, Visual Studio and tools, Windows, Windows 8 | 2 Comments »

Solution for Visual Studio 2010 VB.NET errors “Type ‘MyProject.My.MySettings’ is not defined.” and “MyProject’ is not a member of [Defalut]” #VS2010

Posted by jpluimers on 2012/02/29

(Note the WordPress bug: you cannot have <Default> in a topic title, but having it in the text is fine, hence the [Default] in the title).

When porting some projects from .NET 1.x to .NET 4.x, I got these two errors:

Error 17 Type 'MyProject.My.MySettings' is not defined.
Error 18 'MyProject' is not a member of '<Default>'.

Both errors in the file ...\My Project\Settings.Designer.vb relative to the MyProject.vbproj file.

This was not the result of something like this Visual Studio 2005 bug, but of how the designer generated files are not being regenerated when you change the root namespace only in the MyProject.vbproj file, not through the IDE.

Steps to reproduce:

  1. Create a MyProject class library in VB.NET
  2. In the MyProject.vbproj, change the RootNameSpace into MyNameSpace.MyProject.vbproj
  3. Build

Lesson learned: when using text compare tools, some .vbproj changes should be propagated through the IDE, not through your favourite text compare tool.

When you change it in the IDE, it regenerates the *.Designer.vb files to reflect the changed namespace.

The solution is simple, in the IDE follow these steps:

  1. In the Project Options change the RootNameSpace to a dummy
  2. Build your project
  3. Chante the RootNameSpace to what you want
  4. Build your project

–jeroen

via: type “my.mysettings” “is not defined.” – Google Search.

Posted in .NET, Development, Software Development, VB.NET | Leave a Comment »

P/Invoke: usually you need CharSet.Auto (via: .NET Column: Calling Win32 DLLs in C# with P/Invoke)

Posted by jpluimers on 2012/02/28

I don’t do P/Invoke often, and somehow I have trouble remembering the value of CharSet to pass with DllImport.

In short, pass CharSet.Auto unless you P/Invoke a function that is specific to CharSet.Ansi or CharSet.Unicode. The default is CharSet.Ansi, which you usually don’t want:

when Char or String data is part of the equation, set the CharSet property to CharSet.Auto. This causes the CLR to use the appropriate character set based on the host OS. If you don’t explicitly set the CharSet property, then its default is CharSet.Ansi. This default is unfortunate because it negatively affects the performance of text parameter marshaling for interop calls made on Windows 2000, Windows XP, and Windows NT®.

The only time you should explicitly select a CharSet value of CharSet.Ansi or CharSet.Unicode, rather than going with CharSet.Auto, is when you are explicitly naming an exported function that is specific to one or the other of the two flavors of Win32 OS. An example of this is the ReadDirectoryChangesW API function, which exists only in Windows NT-based operating systems and supports Unicode only; in this case you should use CharSet.Unicode explicitly.

–jeroen

via: .NET Column: Calling Win32 DLLs in C# with P/Invoke.

Posted in .NET, Ansi, C#, Delphi, Development, Encoding, Prism, Software Development, Unicode | 3 Comments »

WordPress XML sourcecode help needed; forum posts gets deleted.

Posted by jpluimers on 2012/02/23

Please one of the WordPress.com support people, contact me through my contact form.

I tried posting this question, but as you can see it is marked as ‘Topic Closed, This topic has been closed to new replies’, and looks empty on your forums’:

Please stop deleting the XML from my

</h1>
Since WordPress deletes anything but the most basic XML from

tags:

See https://wiert.me/wp-content/uploads/2012/02/wordpress-html.doc

When I put that in a WordPress post, it deletes the XML.
It does this for anything but the most basic XML.

Please fix that!

–jeroen

Thanks in advance!

–jeroen

Posted in Development, SocialMedia, Software Development, Web Development, WordPress, WordPress | 2 Comments »

C#/.NET: Assessing the SqlException severity

Posted by jpluimers on 2012/02/22

When handling SqlExceptions in C#, it is wise to assess the Class, as it indicates the severity.

Some classes are user error, others are fatal, etc.

This extension class will help you:

using System;
using System.Data.SqlClient;

namespace bo.MsSql
{
    /// <summary>
    /// see http://msdn.microsoft.com/en-us/library/ms164086.aspx
    /// </summary>
    public static class SqlExceptionSeverety
    {
        public static bool IsInformational(this SqlException sqlException)
        {
            return sqlException.Class < 10;
        }

        public static bool IsUserCorractable(this SqlException sqlException)
        {
            return (sqlException.Class >= 10) && (sqlException.Class < 17);
        }

        public static bool IsSoftwareError(this SqlException sqlException)
        {
            return (sqlException.Class >= 17) && (sqlException.Class < 20);
        }

        public static bool IsFatalSystemProblem(this SqlException sqlException)
        {
            return sqlException.Class >= 20;
        }
    }
}

–jeroen

Posted in .NET, C#, Development, Software Development | Leave a Comment »

FireMonkey and (OS X, iOS, Windows) Link Clearance

Posted by jpluimers on 2012/02/21

Some links that I found useful for doing FireMonkey and development for OS X or iOS:

–jeroen

Posted in Delphi, Development, FireMonkey, OS X FMX, Software Development | 2 Comments »

Funny how StackExchange, StackOverflow, ServerFault, SuperUser and differ in indicating their site outage “We are Offline”

Posted by jpluimers on 2012/02/18

Tonight these most StackExchange sites have maintenance, including their bogs and meta sites (the chat sites like http://chat.stackoverflow.com/ are on-line). I checked these to be off-line, most of the bigger table below are offline too.

Later I will amend this post with the HTML and try to get some site previews too.

A bit later I got this kind of message from Chrome, that tried to protect one of the sites:

Error 139 (net::ERR_TEMPORARILY_THROTTLED): Requests to the server have been temporarily throttled.

Note that http://askubuntu.com/ is up and running :) Read the rest of this entry »

Posted in Development, Pingback, Stackoverflow, Web Development | Leave a Comment »

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