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

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Archive for 2012

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automatic logon in Windows 2003

Posted by jpluimers on 2012/01/27

At a client that still runs Windows Server 2003 (despite the fact that it is in the extended support phase now), I needed to enable automatic logon (one of the tools they run sometimes fails when nobody is logged on).

This was a bit more tricky than just reading [WayBack] How to turn on automatic logon in Windows (now at How to turn on automatic logon in Windows) and following these steps:

To use Registry Editor (Regedt32.exe) to turn on automatic logon, follow these steps:

  1. Click Start, and then click Run.
  2. In the Open box, type Regedt32.exe, and then press ENTER.
  3. Locate the following subkey in the registry:
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
  4. Double-click the DefaultUserName entry, type your user name, and then click OK.
  5. Double-click the DefaultPassword entry, type your password, and then click OK.NOTE: If the DefaultPassword value does not exist, it must be added. To add the value, follow these steps:
    1. On the Edit menu, click New, and then point to String Value.
    2. Type DefaultPassword, and then press ENTER.
    3. Double-click DefaultPassword.
    4. In the Edit String dialog, type your password and then click OK.

    NOTE: If no DefaultPassword string is specified, Windows automatically changes the value of the AutoAdminLogon key from 1 (true) to 0 (false), disabling the AutoAdminLogon feature.

  6. On the Edit menu, click New, and then point to String Value.
  7. Type AutoAdminLogon, and then press ENTER.
  8. Double-click AutoAdminLogon.
  9. In the Edit String dialog box, type 1 and then click OK.
  10. Quit Registry Editor.
  11. Click Start, click Shutdown, and then type a reason in the Comment text box.
  12. Click OK to turn off your computer.
  13. Restart your computer. You can now log on automatically.

Since this depends on some registry settings, you need to make sure they are actually set.
And logging on as someone else will reset the DefaultUserName registry setting.

The article points to another article on “AutoAdminLogon looses DefaultUserName” to solve this using REGINI (and optionally REGDMP which can provide sample output for REGINI), but there is a much easier solution using RegEdit which – as Rob van der Woude points out – can be used unattended as well (besides: REGDMP cannot be downloaded any more, and REGINI requires an additional download).

This is how to do force the DefaultUserName to be reset after logon using RegEdit:

  1. Open an explorer Window in “%ALLUSERSPROFILE%\Start Menu\Programs\Startup“
  2. Create a batch file “run-RegEdit-DefaultUserName.bat” there with this content:
    regedit /s Administrator-DefaultUserName.reg
  3. Create a text file “Administrator-DefaultUserName.reg” in the same directory with content like this: 
    Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"DefaultUserName"="Administrator"

Replace “Administrator” with the username you are actually using.

–jeroen

Via: How to turn on automatic logon in Windows.

Read the rest of this entry »

Posted in Power User, Windows, Windows 10, Windows 7, Windows 8, Windows 8.1, Windows 9, Windows Server 2003, Windows Server 2003 R2, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Vista | 2 Comments »

.NET/C#: Using IDisposable to restore temporary settrings example: TemporaryCursor class

Posted by jpluimers on 2012/01/26

This is WinForms code from a long time ago, but the concept of using an IDisposable interface to do resource cleanup and restore a temporary setting is very valid.

You use the code below like this:

        private void myMethod()
        {
            // set busy cursor
            using (IDisposable waitCursor = new TemporaryCursor(this, System.Windows.Forms.Cursors.WaitCursor))
            {
                // logic that takes a long while
            }
        }

The code below implements the TemporaryCursor class; you can assign any System.Windows.Forms.Cursors item you want.

It restores the cursor upon these three “events”:

Most often the IDispose pattern is being used to make sure that resources get cleaned up. If you think of a wait cursor as a temporary resource, this example becomes much easier to remember.

Of course this is not limited to the System.Windows.Forms realm, you can just as well use this for non-visual temporaries, and other kinds of UIs like ASP.NET, WPF or SilverLight.

using System.Windows.Forms;

namespace bo.Windows.Forms
{
    public class TemporaryCursor : IDisposable
    {
        private Control targetControl;
        private Cursor savedCursor;
        private Cursor temporaryCursor;
        private bool disposed = false;

        public TemporaryCursor(Control targetControl, Cursor temporaryCursor)
        {
            if (null == targetControl)
                throw new ArgumentNullException("targetControl");
            if (null == temporaryCursor)
                throw new ArgumentNullException("temporaryCursor");
            this.targetControl = targetControl;
            this.temporaryCursor = temporaryCursor;
            savedCursor = targetControl.Cursor;
            targetControl.Cursor = temporaryCursor;
            targetControl.HandleDestroyed += new EventHandler(targetControl_HandleDestroyed);
        }

        void targetControl_HandleDestroyed(object sender, EventArgs e)
        {
            if (null != targetControl)
                if (!targetControl.RecreatingHandle)
                    targetControl = null;
        }

        // public so you can call it on the class instance as well as through IDisposable
        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        protected virtual void Dispose(bool disposing)
        {
            if (!disposed)
            {
                if (null != targetControl)
                {
                    targetControl.HandleDestroyed -= new EventHandler(targetControl_HandleDestroyed);
                    if (temporaryCursor == targetControl.Cursor)
                        targetControl.Cursor = savedCursor;
                    targetControl = null;
                }
                disposed = true;
            }
        }

        // Finalizer
        ~TemporaryCursor()
        {
            Dispose(false);
        }
    }
}

–jeroen

Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, Development, Software Development, Visual Studio 2005, Visual Studio 2008, Visual Studio 2010, Visual Studio and tools, WinForms | 4 Comments »

C# text file deduping based on trimmed lines (via: Stack Overflow)

Posted by jpluimers on 2012/01/25

A while ago, I needed to analyze a bunch of files based on the unique trimmed lines in them.

I based my code on the C# Tee filter and the StackOverflow example of C# deduping based on split.

It is a bit more extensive than strictly needed, as it has a few more commandline arguments that come in handy when processing files on the console:

DeDupe - Dedupes a file into unique lines (only the first occurance of a line is kept) standard output
Lines are terminated by CRLF sequences
C# implementation januari 5th, 2012 by Jeroen Wiert Pluimers (https://wiert.wordpress.com),

DeDupe [-i | --ignore] [-t | --trim] [-f | --flush] [-l | --literal] [-? | --h | --help | /?] [file0] [...]
   Example:
 DeDupe --trim file0.txt file1.txt
   Dedupes the appended content of file0.txt and file1.txt into standard output

-t | --trim                  Will trim the lines before considering duplicates
-f | --flush                 Flushes files every CRLF
                               (setting is per tee instance)
-i | --ignore                Ignore cancel Ctrl+C keypress: see UnixUtils tee
-l | --literal               Stop recognizing flags, force all following filenames literally
-? | --h  | /? | --help      Displays this message and immediately quits

Duplicate filenames are quietly ignored.
If no input filenames are specified, then standard input is used
Press Ctrl+Z (End of File character) then Enter to abort.

Here is the source code:

using System;
using System.IO;
using System.Collections.Generic;

namespace DeDupe
{
    class Program
    {
        static void help()
        {
            Console.Error.WriteLine("DeDupe - Dedupes a file into unique lines (only the first occurance of a line is kept) standard output");
            Console.Error.WriteLine("Lines are terminated by CRLF sequences");
            Console.Error.WriteLine("C# implementation januari 5th, 2012 by Jeroen Wiert Pluimers (https://wiert.wordpress.com),");
            Console.Error.WriteLine("");
            Console.Error.WriteLine("DeDupe [-i | --ignore] [-t | --trim] [-f | --flush] [-l | --literal] [-? | --h | --help | /?] [file0] [...]");
            Console.Error.WriteLine("   Example:");
            Console.Error.WriteLine(" DeDupe --trim file0.txt file1.txt");
            Console.Error.WriteLine("   Dedupes the appended content of file0.txt and file1.txt into standard output");
            Console.Error.WriteLine("");
            Console.Error.WriteLine("-t | --trim                  Will trim the lines before considering duplicates");
            Console.Error.WriteLine("-f | --flush                 Flushes files every CRLF");
            Console.Error.WriteLine("                               (setting is per tee instance)");
            Console.Error.WriteLine("-i | --ignore                Ignore cancel Ctrl+C keypress: see UnixUtils tee");
            Console.Error.WriteLine("-l | --literal               Stop recognizing flags, force all following filenames literally");
            Console.Error.WriteLine("-? | --h  | /? | --help      Displays this message and immediately quits");
            Console.Error.WriteLine("");
            Console.Error.WriteLine("Duplicate filenames are quietly ignored.");
            Console.Error.WriteLine("If no input filenames are specified, then standard input is used");
            Console.Error.WriteLine("Press Ctrl+Z (End of File character) then Enter to abort.");
        }

        static void OnCancelKeyPressed(Object sender, ConsoleCancelEventArgs args)
        {
            // Set the Cancel property to true to prevent the process from
            // terminating.
            args.Cancel = true;
        }

        static List<String> filenames = new List<String>();

        static void addFilename(string value)
        {
            if (-1 == filenames.IndexOf(value))
                filenames.Add(value);
        }

        static bool trimLines = false;
        static bool flushFiles = false;
        static bool stopInterpretingFlags = false;
        static bool ignoreCtrlC = false;

        static int Main(string[] args)
        {
            try
            {

                foreach (string arg in args)
                {
                    //Since we're already parsing.... might as well check for flags:
                    if (stopInterpretingFlags)  //Stop interpreting flags, assume is filename
                    {
                        addFilename(arg);
                    }
                    else if (arg.Equals("/?") || arg.Equals("-?") || arg.Equals("-h") || arg.Equals("--help"))
                    {
                        help();
                        return 1; //Quit immediately
                    }
                    else if (arg.Equals("-t") || arg.Equals("--trim"))
                    {
                        trimLines = true;
                    }
                    else if (arg.Equals("-f") || arg.Equals("--flush"))
                    {
                        flushFiles = true;
                    }
                    else if (arg.Equals("-i") || arg.Equals("--ignore"))
                    {
                        ignoreCtrlC = true;
                    }
                    else if (arg.Equals("-l") || arg.Equals("--literal"))
                    {
                        stopInterpretingFlags = true;
                    }
                    else
                    {	//If it isn't any of the above, it's a filename
                        addFilename(arg);
                    }
                    //Add more flags as necessary, just remember to SKIP adding them to the file processing stream!
                }

                if (ignoreCtrlC) //Implement the Ctrl+C fix selectively (mirror UnixUtils tee behavior)
                    Console.CancelKeyPress += OnCancelKeyPressed;

                HashSet<string> keys = new HashSet<string>();
                Int64 index = 0;

                using (StreamWriter writer = new StreamWriter(Console.OpenStandardOutput()))
                {
                    if (filenames.Count == 0)
                        using (StreamReader reader = new StreamReader(Console.OpenStandardInput()))
                        {
                            processInputFileReader(keys, writer, reader, ref index);
                        }
                    else
                        foreach (String filename in filenames)
                        {
                            using (StreamReader reader = new StreamReader(filename))
                            {
                                processInputFileReader(keys, writer, reader, ref index);
                            }
                        }
                    writer.Flush();
                }

            }
            catch (Exception ex)
            {
                Console.Error.WriteLine(String.Concat("DeDupe: ", ex.Message));  // Send error messages to stderr
            }

            return 0;
        }

        private static void processInputFileReader(HashSet<string> keys, StreamWriter writer, StreamReader reader, ref Int64 index)
        {
            string line = readLine(reader);
            while (!string.IsNullOrEmpty(line))
            {
                string candidate = line;
                if (keys.Add(candidate))
                {
                    writer.WriteLine(line);
                    index += line.Length + Environment.NewLine.Length;
                    if (flushFiles)
                        writer.Flush();
                }

                line = readLine(reader);
            }
        }

        private static string readLine(StreamReader reader)
        {
            string line = reader.ReadLine();
            if (null != line)
                if (trimLines)
                    line = line.Trim();
            return line;
        }
    }
}

–jeroen

via: C# text file deduping based on split – Stack Overflow.

Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, Development, Software Development | 4 Comments »

Upgrading a Windows XP machine with Visual Studio 2005: KB2251481 Security Update for Microsoft Visual Studio 2005 Service – Microsoft Answers

Posted by jpluimers on 2012/01/24

Every once in a while you need to maintain really old stuff, and start update an old VM.

In case of Visual Studio 2005, the Windows Update and Microsoft Update will get you into a condition where it cannot install “Security Update for Microsoft Visual Studio 2005 Service Pack 1 XML Editor (KB2251481)“. Not even the direct download will install.

The search for “some updates were not installed” “Security Update for Microsoft Visual Studio 2005 Service Pack 1 XML Editor (KB2251481)” pointed me to the solution:

There are two versions of KB2251481 June and August. When the June version is installed, the August version refuses to install.

Uninstall the original KB2251481 from the Control Panel. Then reinstall the August version.

The KB2251481 article mentions this only for the “Microsoft Visual Studio 2005 Premier Partner Edition SP1”, but it happens with other Visual Studio 2005 editions as well.

–jeroen

via: KB2251481 Security Update for Microsoft Visual Studio 2005 Service – Microsoft Answers.

Posted in .NET, Development, Software Development, Visual Studio 2005, Visual Studio and tools | 1 Comment »

the series “Dogbert’s Tech Support: How May I Abuse You” #dilbert #fun

Posted by jpluimers on 2012/01/23

Last weekend the series “Dogberts Tech Support: How May I Abuse You“, got a new episode:

Dilbert comic 2011-01-22: Dogbert's Tech Support: How may I abuse you

Dilbert comic 2011-01-22: Dogbert's Tech Support: How may I abuse you (Image courtesey of Dilbert.com)

It is great to see that since 1998, not much has changed :)

–jeroen

via: Dilbert comic of 2011-01-22: Dogbert’s Tech Support

Posted in Comics | Leave a Comment »

ssh-keygen: password-less SSH login script (via Novell User Communities)

Posted by jpluimers on 2012/01/20

I usually get at least one step wrong when doing ssh-keygen and transferring they public key by hand, so here [WayBack] is a nice script called trusted-key-exchange.sh that helps you install a private/public keypair for remote SSH login without having to type a remote password.

Edit:

The script uses ssh-copy-id to actually perform the copying of the public key portion to the destination server. So you can also use this command to do that yourself:

ssh-copy-id -i ~/.ssh/id_ed25519.pub user@target-host
ssh-copy-id -i ~/.ssh/id_rsa.pub user@target-host

Note that at the time of editing (early 2018), you should not use DSA based keys any more; see [WayBack] Secure Secure Shell.

Note:

–jeroen

via: [WayBack] ssh-keygen: password-less SSH login script | Novell User Communities.

Posted in *nix, Power User | Leave a Comment »

Batch file examples – Wait using CHOICE (via: RobVanDerWoude.com)

Posted by jpluimers on 2012/01/19

Most batchfile wait examples require a functioning network connection.

Just in case you haven’t, Rob van der Woude has a nice example on his batch file Wait page using the Choice command.

The bummer is: choice is available on almost all Windows versions (actually since DOS 6.x), but not on Windows XP, and not on Windows 2000, but it is there in Windows Vista and up where you can use the timeout command :(

Alternatives can be found in the other examples on Rob’s wait page.

CHOICE – Wait.bat: Uses CHOICE to wait for a specified number of seconds.

By using REM | before the CHOICE command, the standard input to CHOICE is blocked, so the only “way out” for CHOICE is the time-out specified by the /T parameter.

The idea was borrowed from Laurence Soucy, I added the /C parameter to make it language independent.

@ECHO OFF
IF "%1"=="" GOTO Syntax
ECHO.
ECHO Waiting %1 seconds
ECHO.
REM | CHOICE /C:AB /T:A,%1 &gt; NUL
IF ERRORLEVEL 255 ECHO Invalid parameter
IF ERRORLEVEL 255 GOTO Syntax
GOTO End
:Syntax
ECHO.
ECHO WAIT for a specified number of seconds
ECHO.
ECHO Usage: WAIT n
ECHO.
ECHO Where: n = the number of seconds to wait (1 to 99)
ECHO.
:End

–jeroen

via: Batch file examples – Wait.

Posted in Batch-Files, Development, Scripting, Software Development | Leave a Comment »

CodePlex TFS 2010 login: prefix login with “snd\” domain and suffix username with “_cp” (via Ahmed Al-Asaad’s Blog)

Posted by jpluimers on 2012/01/18

I keep forgetting this:

When logging in to CodePlex using TFS, then you need to prefix your username with “snd\” and suffix it with “_cp“.

So if your CodePlex username is wiert, then your login becomes snd\wiert_cp.

Somehow, this used to be more prominently on the codeplex site, but it isn’t any more.

–jeroen

via: TFS2010 « Ahmed Al-Asaad’s Blog.

Posted in CodePlex, Development, Source Code Management, TFS (Team Foundation System) | Leave a Comment »

Dear Mister Jones » How to insert a carriage return with batch

Posted by jpluimers on 2012/01/17

When appending multiple text files to a big one (for instance to post-processing on the total: dedupe, sort, gather statistics, etc) you often will find one or more of the source files missing a CRLF.

So you will have to insert those carriage return line feed combo’s manually.

Well, mr Jones points out that:

there’s actually an easy way to simply echo a carriage return and line feed instead, by just issuing an echo command followed immediately by a period (no space in between), like this:

echo. >> somefile.txt

Thanks Jared!

–jeroen

via: Dear Mister Jones » How to insert a carriage return with batch.

Posted in Batch-Files, Development, Scripting | Leave a Comment »

Is #Trello #GTD on Steroids?

Posted by jpluimers on 2012/01/16

Will start playing with Trello checking if it is indeed GTD on steroids.

–jeroen

Via: Organize anything, together. | Trello.

Posted in LifeHacker, Power User | Leave a Comment »

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