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 2.0’ Category

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C#/.NET/LINQ: DotNetStat: netstat.exe with TCP ports grouped by host

Posted by jpluimers on 2013/06/18

A lot of people have written .NET equivalents of netstat code. Basically there are two starting points:

I adapted the first, made the output very much like the built-in Windows netstat, and added some LINQ code to demonstrate grouping and ordering.

Now you get grouped output like this:

Distinct Remote Address:Port pairs by Remote Address:
107.20.249.140   443
107.20.249.78    443
127.0.0.1        6421, 19872
192.168.1.81     17500, 61678
199.47.218.159   443
199.47.219.148   80
199.47.219.160   443
23.21.220.140    443
23.23.127.94     443

The code below is part of the DotNetStat example.

It demonstrates a few important LINQ aspects beyond the LINQ Query Expressions (C# Programming Guide) intro and 101 LINQ Samples in C#.:

Read the rest of this entry »

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, Development, Jon Skeet, Software Development | Leave a Comment »

.NET/C# – CreateTemporaryRandomDirectory (via: Stack Overflow)

Posted by jpluimers on 2013/06/13

A while ago I needed unique temporary directories. This appears not to be standard functionality in the .NET System.IO.Path or System.IO.Directory class.

Josh Kelley asked a question about it before, and I adapted the example by Scott-Dorman based on GetTempPath and GetRandomFileName  and comments by Chris into a more robust CreateTemporaryRandomDirectory one that works in .NET 2.0 and higher:

using System.IO;

namespace BeSharp.IO
{
    public class DirectoryHelper
    {
        public static string GetTemporaryDirectory()
        {
            do
            {
                try
                {
                    string tempPath = Path.GetTempPath();
                    string randomFileName = Path.GetRandomFileName();
                    string tempDirectory = Path.Combine(tempPath, randomFileName);
                    Directory.CreateDirectory(tempDirectory);
                    return tempDirectory;
                }
                catch (IOException /* ex */)
                {
                    // continue
                }
            } while (true);
        }
    }
}

You can call it like this: Read the rest of this entry »

Posted in .NET, .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 | 2 Comments »

Don’t pass interfaces between application architectures over a DLL boundary

Posted by jpluimers on 2013/05/15

It is unwise to pass objects allocated in one framework over a DLL boundary to a different framework.

In the case of Using C dll in delphi return nothing, someone tries to pass an Interface to some memory in the C side over to Delphi.

Unless that interface is COM based, don’t do that!

In a more general way: don’t pass memory allocated on the DLL side over to the client side, no matter what kind of client you have.

From the DLL, either pass simple types, or fill buffers allocated at the client side.

Edit:

There was a nice Delphi DLL return string from C# … .NET 4.5 Heap Corruption but .NET 4.0 works? Explain please? – Stack Overflow question explaining in detail what to do for strings in a specific case: use the COM heap on the Delphi side using CoTaskMemAlloc (actually it uses the OLE task memory allocator as the Old New Thing explains).

–jeroen

via: Using C dll in delphi return nothing – Stack Overflow.

Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, Delphi, Delphi 1, Delphi 2005, Delphi 2006, Delphi 2007, Delphi 2009, Delphi 2010, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Delphi 7, Delphi 8, Delphi x64, Delphi XE, Delphi XE2, Delphi XE3, Development, Software Development | 5 Comments »

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, here, here, here 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 »

Converting Visual Studio 2003 WinForms to Visual Studio 2005/2008/2010/2012 partial classes (via: Duncan Smart’s Weblog)

Posted by jpluimers on 2013/01/10

In the .NET 1.x past, the WinForms designers in Visual Studio .NET and Visual Studio 2003 would put the C# or VB.NET code containing the form code as the InitializeComponent method of the top most class monolithic C# and VB.NET files that also contain the user code (for events and such).

As of Visual Studio 2005 (actually: Whidbey and higher), this code is based on partial classes. For each form (actually designable entity, but lets limit this to WinForms forms) you get a MyForm.cs and MyForm.Designer.cs

As a side note, with a bit of effort, you can generate the Windows Form Designer generated code yourself as this answer shows. This is for instance convenient when you have form definitions in a different technology and want to convert it to WinForms, WPF or another form of designer based .NET code.

I long time ago I wrote a short manual for co-workers on converting the monolithic files (for people interested, it is below).

Since then I found a couple of very interesting links: Read the rest of this entry »

Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Software Development, Visual Studio 11, Visual Studio 2002, Visual Studio 2003, Visual Studio 2005, Visual Studio 2008, Visual Studio 2010, Visual Studio and tools, WinForms | 1 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 »

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