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 ‘.NET 3.5’ Category

Command line tool to manage Windows 7 Libraries, with source code – The Old New Thing – Site Home – MSDN Blogs

Posted by jpluimers on 2013/02/28

Interesting: Command line tool to manage Windows 7 Libraries, with source code – The Old New Thing – Site Home – MSDN Blogs.

Especially as next to some documentation, it points to these two:

–jeroen

Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, Batch-Files, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Scripting, Software Development | Leave a Comment »

A few more interesting links on Delphi, C# and CLR history (trip down memory lane; Peter Sollich)

Posted by jpluimers on 2013/02/27

The continuation of the trip down memory lane

Few people know the name Peter Sollich, as he always chose not to be a public figure (for instance, he is absent on the Outstanding Technical Achievement video).

Peter has been very important for both the Delphi and the .NET worlds: he was the original author of the 32-bit product that became the Delphi x86 compiler.

A few interesting links came up when using his name in some Google searches.

–jeroen

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++ Builder, Delphi 1, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Development, Software Development | 2 Comments »

Behind the Code with Anders Hejlsberg (via: Cape Cod Gunny Does Delphi: Priceless)

Posted by jpluimers on 2013/02/26

I remember having heard this interview on audio a long while ago, but couldn’t find it back. Now I stumbled across Cape Cod Gunny writing about this great video where Anders Hejlsberg is interviews by Research Channel for an hour. To quote Cape Cod Gunny:

I just watched this interview with Anders Hejlsberg for the first time. This is truly an amazing interview. It’s rather long, about 1 hour, but it is so worth it. I’m not giving anything away… you’ll have to just watch and enjoy.

I am giving a few things away: trip down memory lane, putting big parts of software development history into perspective,

Since Anders has been so versatile, influential and still humble, this is a must watch for anyone in the software field. To quote Research Channel:

This episode features industry luminary, Anders Hejlsberg. Before coming to Microsoft in 1996 he was well noted for his work as the principal engineer of Turbo Pascal and the chief architect of the Delphi product line. At Microsoft, he was the architect for the Visual J++ development system and the Windows Foundation Classes (WFC). Promoted to Distinguished Engineer in 2000, Anders is the chief designer of the C# programming language and a key participant in the development of Microsoft’s .NET Framework. In this show, Anders is joined by a surprise guest. This episode of ‘Behind the Code’ is hosted by Barbara Fox – former senior security architect of cryptography and digital rights management for Microsoft.

Thanks Gunny for pointing me at this!

–jeroen

via: Cape Cod Gunny Does Delphi: Priceless: Behind the Code with Anders Hejlsberg.

(PS: how a video published in the C# 3 era can be so current <g>).

And if you feel for more, here, hereherehere and here are some more, are a few lists of videos where Anders speaks.
From a historic perspective, I like these most:

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, Delphi, Delphi 1, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Development, Software Development | 4 Comments »

Impossible: Property using Generics in Delphi. Interfaces/classes/methods/fields/constraints/type inferencing are

Posted by jpluimers on 2013/01/30

Just in case you wonder about Property using Generics in Delphi, they are not possible.

Thanks David for mentioning it, Hallvard for mentioning it even earlier and Rudy for confirming it.

These are supported with Generics in Delphi:

All of the supported aspects are linked to articles from excellent authors. There is far more on the internet about Delphi and Generics, but those are a good start.

Thanks Malcolm, Phil, Barry, Hallvard, Jolyon and many others for posting all those articles!

Note that this is not possible in C# either, Julian Bucknall organized a chat and explains why, but there is a workaround which I might try to port to Delphi in the future.

–jeroen

via: Property using Generics in Delphi – Stack Overflow.

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, Delphi, Delphi 2009, Delphi 2010, Delphi XE, Delphi XE2, Delphi XE3, Development, Software Development | 3 Comments »

.NET/C#: do not do “if (!Directory.Exists(path)) Directory.CreateDirectory(path))”

Posted by jpluimers on 2013/01/24

During code reviews, I often see people do things like this:

if (!Directory.Exists(directoryPath))
    Directory.CreateDirectory(directoryPath);

or this:

DirectoryInfo directoryInfo = new DirectoryInfo(directoryPath);
if (!directoryInfo.Exists)
    directoryInfo.Create();

You don’t need the if statements here. Read the rest of this entry »

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, Development, Software Development | 1 Comment »

.NET/C#: what is the meaning of “Comparing two IEnumerables for equality”?

Posted by jpluimers on 2013/01/09

Until I realized that comparing two IEnumerables needed some extra thought, I wondered why Assert.AreEqual would not support them.

jrista pointed me in the right direction answering a question about c# – How does Assert.AreEqual determine equality between two generic IEnumerables?

The correct answer is “it doesn’t”, but that is really dense.

IEnumerables are just that: being generic or normal, they allow you to enumerate things. They can get you an enumerator (generic or not) that has a notion of Current (generic or normal) and such, but no knowledge of the underlying data.

Comparing them needs you to think about the enumeration and the underlying data at the same time. You can get two kinds of comparisons: Read the rest of this entry »

Posted in .NET, .NET 3.5, .NET 4.5, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Software Development | Leave a Comment »

.NET/C#: use Assembly.GetName() if you to access internal/private information from Assembly

Posted by jpluimers on 2012/12/26

There is a lot of information in Assembly that is either internal or private. Luckily you van get an AssemblyName instance through Assembly.GetName() or Assembly.GetName(Boolean) which has quite a few public members that get initialized while calling the internal AssemblyName.Init method.

This is the member mapping of AssemblyName members to Assembly members:

AssemblyName member Assembly member
Name GetSimpleName() *internal
GetPublicKey() GetPublicKey() *internal
GetPublicKeyToken() null
Version GetVersion() *internal
contains the AssemblyVersionAttribute of the assembly
CultureInfo GetLocale() *internal
HashAlgorithm GetHashAlgorithm() *private
VersionCompatibility AssemblyVersionCompatibility.SameMachine
CodeBase GetCodeBase(Bool) *internal
Flags GetFlags() | AssemblyNameFlags.PublicKey
KeyPair null
ProcessorArchitecture complex set of calls

–jeroen

via: Assembly.GetName Method (Boolean) (System.Reflection).

Posted in .NET, .NET 3.5, .NET 4.5, ASP.NET, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Software Development | Leave a Comment »

.NET/C# – How to create a file and its parent directories in one method call? (via: Stack Overflow)

Posted by jpluimers on 2012/12/18

Ever since .NET 1 there has been no built-in way to create a file including all its parent directories.

Hence small FileHelper class far below.

The fundament of the class is this CreateUnderlyingDirectory method, that uses System.IO.Path.GetDirectoryName to obtain the parent directory of a path, and then System.IO.Directory.CreateDirectory to create it (and any parent directories) if needed.

        public static void CreateUnderlyingDirectory(string path)
        {
            string directoryPath = Path.GetDirectoryName(path);
            Directory.CreateDirectory(directoryPath); // NOP if it exists, will create all parent directories if not
        }

A few helper methods get you a StreamWriter either empty/appended, or always empty Read the rest of this entry »

Posted in .NET, .NET 3.5, .NET 4.5, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Software Development | Leave a Comment »

.NET/C#/WinForms: small code snippet to enable Ctrl-A for select all in a single/multi-line TextBox

Posted by jpluimers on 2012/12/04

WinForms does not automatically enable Ctrl-A as “Select All” action.

The below code snippet works when you bind it to the KeyDown event of a TextBox (actually the event is on Control).

The e.SuppressKeyPress = true suppresses the bell sound in a multiline TextBox, as e.Handled = true won’t.

        private void textBox_KeyDown_HandleCtrlAToSelectAllText(object sender, KeyEventArgs e)
        {
            TextBox textBox = sender as TextBox;
            if (null != textBox)
            {
                if (e.Control && e.KeyCode == Keys.A)
                {
                    textBox.SelectAll();
                    e.SuppressKeyPress = true;
                }
            }
        }

–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, Development, Software Development | Leave a Comment »

.NET/C# LINQ gem: How to check if a char in a list of characters (via Stack Overflow)

Posted by jpluimers on 2012/11/21

Often when comparing characters with a list of characters, that list does not consist of consts.

It if were, you could make a switch statement:

                    switch (item)
                    {
                        case '/':
                        case '\\':
                        case ';':
                            addSeparator(separatorsUsed, item);
                            break;
                    }

But reality is that you cannot do things like this:

                    switch (item)
                    {
                        case Path.AltDirectorySeparatorChar: // Error: A constant value is expected
                        case Path.DirectorySeparatorChar:
                        case Path.PathSeparator:
                            addSeparator(separatorsUsed, item);
                            break;
                    }

However, you can perform a small trick and use LINQ to write some pretty elegant code based on Contains.

                    char[] pathSeparators = { Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar, Path.PathSeparator };
                    // LINQ: http://stackoverflow.com/questions/1818611/how-to-check-if-a-char-in-a-char-array/1818635#1818635
                    if (pathSeparators.Contains(item))
                        addSeparator(separatorsUsed, item);

The LINQ logic has the logic backwards (you can think of it like “item in pathSeparators”, but it is far easier to read than this:

                    if ((item == Path.AltDirectorySeparatorChar) || (item == Path.DirectorySeparatorChar) || (item == Path.PathSeparator))
                        addSeparator(separatoseparatorsUsedrsInUse, item);

Full source of a demo application: Read the rest of this entry »

Posted in .NET, .NET 3.5, .NET 4.5, C#, C# 3.0, C# 4.0, C# 5.0, Development, LINQ, Software Development, Visual Studio 11, Visual Studio 2008, Visual Studio 2010, Visual Studio and tools | 2 Comments »