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I'm writing a little command line regex search and replace doodad. The user can put in some input, either through a file or stdin a search expression via command line or a file, and a replace expression via command line or file. It's the replace expressions that are giving me trouble. I'd like to be able to put a \t in the replace expression and have it place a tab during the replace.
When I put the \t in a string in the code, it gets replaced as a tab, of course. But if I put one in the expression on the command line, it gets read as a literal string. When I read the expression from a file, even if it has hard tabs in it, they somehow get converted to literal /t's somewhere in the replacing. I'm totally stumped. Can someone help me?
EDIT: I ended up using regex to find all the \t's (and \n's) in the replace string and replacing them with tabs and newlines. To actually find a literal \t though, I ended up having to quadruple escape them (\\\\t) :p.
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Because the character '\t' (0x9) is different from "\t". An escape character is just that - a single character. When you read input from the command line, everything is already a string and each character is treated as a separate character.
The only way to really treat this string as the character is to perform a string replacement for known escape characters. You could use string.Replace("\\t", "\t") and other sequences (or use a simple map for fewer lines of code and easier maintenance).
Microsoft MVP, Visual C#
My Articles
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Hi everybody, this is my first post so please bear with me. Ok here's what I am trying to do, and for the love of me I can't 'see' an implicit conversion happenning, so why the hell is the compiler whining???
here is a class skeleton, similar to what I have
public class X
{
protected void ThisIsKillingMe(byte[] oldABC)
{
byte[] newABC = new byte[100];
// line below reports an implicit complier error
newABC[i] = oldABC[p] ^ xyz[q];
}
private static readonly byte[] xyz = {0x12, 0x5F, ....};
}
Thanks for any and all help.
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I'm presuming that when you perform the ^ on the two byte data types (which are Integers, btw), the compiler performs an implicit conversion to Integer. You are then trying to assign the resultant integer value to the newly declared byte array.
You probably need to cast the result back to byte.
Or I could be totally full of it 
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You are the Man. Thanks so much, doing this worked -
newABC[i] = BitConverter.GetBytes(oldABC[p] ^ xyz[q])[0];
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Hi. Im -sort of- new to the C# languange and have read a couple of tutorials and such. I think I have the basic knowledge of it but would like something to challange me. Would anyone know of a site that contains just little beginner task.
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No.... hey write i program that finds one!
Just kidding, try some of the sites listed at the bottom of the page.
"No matter where you go, there your are." - Buckaroo Banzai
-pete
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Note that knowing C# doesn't mean you know .NET. C# is just one of about 30 languages that targets the Common Language Runtime (CLR). It uses the .NET Framework Class Library (FCL), even if only a little (like the primatives). Read through the class library documentation of the .NET Framework SDK. At least get an idea of what's available and how the classes and other types work.
[EDIT] This isn't meant as a slam, merely a suggestion to help you learn about .NET, not just a language. The distinction is important, understanding that the language is merely a syntax (some support more features, mind you) for writing a managed application or library. [/EDIT]
Microsoft MVP, Visual C#
My Articles
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Heath Stewart wrote:
[EDIT] This isn't meant as a slam, merely a suggestion to help you learn about .NET, not just a language. The distinction is important, understanding that the language is merely a syntax (some support more features, mind you) for writing a managed application or library. [/EDIT]
This is very true. I came here trying to learn C# and realized about a month ago that I need to understand the .NET framework, because it's the framework that all the .NET languages use. Then C# is just learning syntax to acces the underlying system.
Great answer Heath. Voted you a fiver for this one.
Yes, I program in VB6, but only because I use it to fill my addiction to having a dry place to sleep and food to eat!
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Hi!
I want to make an MDI application.
I want the Parent form (frmMain to hold a menu and a Panel (docked top).
And I want the MDIChild Forms to be encased, but below the Panel.
How do I do that ?
Thanks! and cheers 
Antoine
This by our hands that dream,
"I shall find a way or make one!"
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antoine@orchus-tech wrote:
I want to make an MDI application.
I want the Parent form (frmMain to hold a menu and a Panel (docked top).
And I want the MDIChild Forms to be encased, but below the Panel.
How do I do that ?
1. Make frmMain a MDI form by changing its IsMDIContainer property to true.
2. Add or "drag" a panel from the Toolbox to frmMain form in the form designer and then change its Dock property to Top.
3. Add or "drag" a menu from the Toolbox to frmMain.
4. Make sure that you have a form added to your project for the MDIChild window.
5. Depending on how you want to handle your child window creation, these steps may vary. If you will be implementing a "New" command, then in its event handler in the frmMain class, type (frmChild should be replaced with whatever name you named your child form):
line 1: frmChild child = new frmChild();
line 2: child.MdiParent = this;
line 3: child.Show();
6. If you want things to be a little nicer, add a member variable to your frmMain class, possibly by the name of "childCount" of the uint type. Then between lines 2 and 3 from above, type:
line 3: childCount += 1;
line 4: child.Text = "Document " + childCount.ToString();
Please note that the line numbers above are there merely for reference only. After performing these steps, you should have the beginning workings of an MDI App. Hope this helps.
Happy Programming and God Bless!
Internet::WWW::CodeProject::bneacetp
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Hi!
THis is what I first did.
But the child can move 'under' the panel, as though it did not exist.
Also, when you max the child, its min-max box goes way up there under the parents' one,
instead of under the panel.
Thanks!
Antoine
This by our hands that dream,
"I shall find a way or make one!"
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Oh... The behaviors that you described are default to Windows MDI apps. You could remove those buttons from your MDI Child and put a button or some other UI on your panel to handle the close, min, and max events.
As far as constraining the child's movement, you could do calculations to find the size of the parent window and then calculate how much the top area (titlebar, menubar, panel) takes up. Then constrain the children forms using that info.
I hope this helps.
Happy Programming and God Bless!
Internet::WWW::CodeProject::bneacetp
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Is there a way to get the resolution of the desktop not including the taskbar. So that something may be placed in the lower right hand corner of the screen about the taskbar?
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Screen.PrimaryScreen.Bounds.Width
Screen.PrimaryScreen.Bounds.Height
These two properties should help.
Happy Programming and God Bless!
Internet::WWW::CodeProject::bneacetp
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Actually, it's Screen.PrimaryScreen.WorkingArea. The Bounds includes the area covered by any AppBars (like the Task Bar).
Microsoft MVP, Visual C#
My Articles
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Thanks for correcting me on that. I will keep that info in mind. Once again, thanks! 
Happy Programming and God Bless!
Internet::WWW::CodeProject::bneacetp
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Hi,
I've seen various postings on the code project about creating a pdf file programmatically, but none of them seem to work or they mention short comings in the process. Is their a way to do this? I have an xml file I'd like to create as a .pdf file.
Can anyone point me to a free solution to do this?
Thanks
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You could use XSL:FO and apache FOP which is a complete ballache. Theres some programs out there http://www.gohtm.com/ for example.
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Hi all,
Are there any good, cheap or free obsfucator for C#
beside the Dotfuscator ?
Thank
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Did you try searching google[^] first? Several hits come up. Evaluate them and make your own judgement about how good they are; afterall, an good obfuscator is one that does what you need.
Microsoft MVP, Visual C#
My Articles
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Hi all,
is there any means to program a dynamic form at
runtime by c# ? I mean to create a form with controls
whose positions or control type are determined at runtime ?
e.g. can I program the code to read in a xml file for the
configuration(the list of controls and its position) of the form
to render the form UI to the users at runtime ?
Thanks
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Yes you can. It's no different from the code generated by the Windows Form Designer. You can find examples of this all over, but especially if you look at the Windows Forms Designer generated code section of a form created in the designer.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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