Regex Match counting problem - C# Discussion Boards

Re: How to find the Content datatype in a String

Guffa1-Aug-08 23:35

Guffa

1-Aug-08 23:35

sekhar.k wrote:
Could you please write code for that.

I thought that this was a forum for programmers, not copy-pasters... Wink | ;)

if (Regex.Match(str, "^\d+$").Success) ...

^ = start of string
\d = any digit
+ = one or more times
$ = end of string

Despite everything, the person most likely to be fooling you next is yourself.

The reason behind the differences of this.Font = fontdialog1.Font and btnTest.Font

Lim Yuxuan1-Aug-08 18:37

Lim Yuxuan

1-Aug-08 18:37

This is my first code :

private void fontToolStripMenuItem_Click(object sender, EventArgs e)
{
fontDialog1.ShowDialog();//display the interface to change font
this.Font= fontDialog1.Font;
}

and the result i get for chaning the font size to 14 is this :

After that, I change the code to this :

private void fontToolStripMenuItem_Click(object sender, EventArgs e)
{
fontDialog1.ShowDialog();//display the interface to change font
btnTest.Font= fontDialog1.Font;
}

and this is what i get for changing the font size to 14 :

It seems that by using " this.Font " causes the form and the button to resize in proportion with the Font size of the button.

However, by using "btnTest.Font" causes only the font size of the button to change without making the form and button to resize in proportion with the font size of the button.

Can anyone please tell me why is that so ?

Re: The reason behind the differences of this.Font = fontdialog1.Font and btnTest.Font

Gideon Engelberth2-Aug-08 2:12

Gideon Engelberth

2-Aug-08 2:12

The difference is because the Form has its AutoScaleMode property set to Font (which I believe is the VS default for that property). So when you set the Form font size, it triggers an auto scale, but since the Button does not have an AutoScaleMode property, changing the font size does nothing.

For what it's worth, if you were using WPF, the button would have resized in both situations. So if you really want that resizing behavior and your requirements allow WPF, I would suggest switching. Otherwise, you may end up having to find some component that does it for you or write all the resizing code yourself.

Re: The reason behind the differences of this.Font = fontdialog1.Font and btnTest.Font

Lim Yuxuan2-Aug-08 4:56

Lim Yuxuan

2-Aug-08 4:56

Thanks alot! I experimented with the AutoScaleMode property and have a better understanding of the reason.

Add rular in toolbar

amitshan1-Aug-08 18:13

amitshan

1-Aug-08 18:13

plz any one tale me how to add rular in toolbar what is the code for..

amitshan

Re: Add rular in toolbar

Krazy Programmer1-Aug-08 22:13

Krazy Programmer

1-Aug-08 22:13

Click this [^]
Hi this may help You i Suggest Google this u will find many

Happy programming

If You win You need not Explain............
But If You Loose You Should not be there to Explain......

Re: Add rular in toolbar

Paul Conrad2-Aug-08 10:29

Paul Conrad

2-Aug-08 10:29

amitshan wrote:
what is the code for..

Wow. Can't do your own code? Google on how to add a ruler to the toolbar, learn how to code it. Hmmm | :|

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

Regex Match counting problem

Mohammad A Gdeisat1-Aug-08 17:06

Mohammad A Gdeisat

1-Aug-08 17:06

Hi all

I have a problem in counting/extracting matches from a URL string using Regex:

My URL looks like this:
www.website.com/LanguageName/BookName/filename.txt

I use the following code to extract Language name and Bookname:

Match bookMatch = Regex.Match(requestString, "/[^/]*/[^$]", RegexOptions.RightToLeft);<br />
            BookInfo bookInfo = new BookInfo();<br />
            if (bookMatch.Success)<br />
            {                <br />
                //remove the forward slashes from the book name<br />
                bookInfo.BookName = bookMatch.Groups[0].Value.Substring(1, bookMatch.Groups[0].Value.Length - 3);<br />
                Match langMatch = bookMatch.NextMatch();<br />
                if (langMatch.Success) //2nd success (for the language)<br />
                {<br />
                    bookInfo.Langauge = langMatch.Groups[0].Value.Substring(1, langMatch.Groups[0].Value.Length - 3);                    <br />
                }<br />
                <br />
            }<br />
            return bookInfo;

Now the code successfully extracts Bookname as it is rightmost in the expression, let us assume that we have the following URL:

www.website.com/LanguageName/BookName/filename.txt
bookMatch will match "/BookName/f", so I remove the 1st one and last two characters to get the bookname correctly.

Now the langMatch doesn't catch the language in the string which should be "/LanguageName/B", it seems that this is happening becoz the 1st match (right to left) has ended at the slash "/" before the BookName, so the search for the next Match will begin on the "e" (last char) character of the LanguageName which will not result in a match.

So how to force the search for the next match to begin on the "/" between the "B" and the "e"?

Any ideas? thanks.

And ever has it been that love knows not its own depth until the hour of separation

Mohammad Gdeisat

Re: Regex Match counting problem

User 66582-Aug-08 0:56

User 6658

2-Aug-08 0:56

Unfortunately I can't help you with this problem, but why don't you use the Uri class to extract the necessary parts of the URL?
You can use this code:

Uri url = new Uri(@"http://www.website.com/LanguageName/BookName/filename.txt");

string languageName = url.Segments[1];
string bookName = url.Segments[2];

regards

modified 12-Sep-18 21:01pm.

Re: Regex Match counting problem

Mohammad A Gdeisat2-Aug-08 0:59

Mohammad A Gdeisat

2-Aug-08 0:59

Excellent, I didn't know about this class Smile | :)

However, if anybody knows how to do it using a Regex then I would be glad to know

Thanks mate Wink | ;)

And ever has it been that love knows not its own depth until the hour of separation

Mohammad Gdeisat

Re: Regex Match counting problem [modified]

User 66582-Aug-08 1:08

User 6658

2-Aug-08 1:08

In your case this regex will work, but you have to carefully test it with other URLs:

[^/]/(?<LanguageName>[^/]+)/(?<BookName>[^/]+)/

And some code:

Regex regex = new Regex(@"[^/]/(?<LanguageName>[^/]+)/(?<BookName>[^/]+)/");
Match match = regex.Match(@"www.website.com/LanguageName/BookName/filename.txt");
if (match.Success)
{
	string languageName = match.Groups["LanguageName"]);
	string bookname = match.Groups["BookName"]);
}

regards

modified 12-Sep-18 21:01pm.

Re: Regex Match counting problem

Gideon Engelberth2-Aug-08 2:22

Gideon Engelberth

2-Aug-08 2:22

What you are looking for is the concept of a lookahead and lookbehind. This pattern should work:

(?<=/)[^/]*(?=/)(?<!$)

I would suggest looking at the documentation to fully understand how lookahead/behind expressions work. Here's a link to get started:MSDN

Label Text

nelsonpaixao1-Aug-08 14:13

nelsonpaixao

1-Aug-08 14:13

Hi, this is silly Dead | X|

How can i force the write in the next line/row?

No Picture Available

No Picture
Available

Dead | X|

Thanks

Re: Label Text

MarkB7771-Aug-08 14:45

MarkB777

1-Aug-08 14:45

<br />
Label1.Text = "Line1\nLine2";<br />

Mark Brock

Click here to view my blog

Re: Label Text

DaveyM691-Aug-08 21:13

DaveyM69

1-Aug-08 21:13

Environment.NewLine

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)

Re: Label Text

Thomas Stockwell2-Aug-08 7:34

Thomas Stockwell

2-Aug-08 7:34

this.label1.Text="line 1"+Convert.ToChar(10)+Convert.ToChar(13)+"Line 2";

Regards,
Thomas Stockwell

Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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How to use Queue.Synchronized

JoeRip1-Aug-08 13:58

JoeRip

1-Aug-08 13:58

It's not clear to me how I am expected to use Queue Synchronization.

Is this a general state, which makes the Queue thread safe? Or is this a short, temporary measure I use to lock the queue before I read or write it, and immediately release it when I'm done?

The documentation and samples are too short and don't go into detail on this.

So my question is: do I simply wrap my Queue with a synchronized wrapper and leave it on, doing all further access through that wrapper?

Or do I only wrap the Queue when I'm accessing it, and immediately drop the wrapper when I'm done?

Do I pass the wrapper to other objects, or only the original Queue?

Thanks for any help here.

Re: How to use Queue.Synchronized

Mark Salsbery1-Aug-08 14:27

Mark Salsbery

1-Aug-08 14:27

Once you call Synchronized(), you should use the returned wrapper
everywhere you would have used the original unsynchronized queue.
Use of the queue through the wrapper will be thread safe for all
"single operation" methods on the queue.

Make sure Synchronized() is really what you need for a thread safe queue.
Enumerating and indexing the queue aren't going to be thread safe
so you may need additional locks.

Making your own thread safe wrapper (or derived) queue class can
be better in some situations. It allows you to implement locks
the way you need to (like using a ReaderWriterLockSlim for producer/consumer
thread access) and provide properly locked enumerating methods.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: How to use Queue.Synchronized

JoeRip1-Aug-08 15:02

JoeRip

1-Aug-08 15:02

Thanks for the response. Okay, so the Sync wrapper persistently replaces the Q itself, and it is the object I should pass around between methods, etc. That was not entirely clear to me before.

This should probably work for what I'm doing; I spawn a listener object on a new thread, which listens for events from a COM object. My main thread passes various Queues to the spawned object (actually, sets them as properties), and the spawned object, when it receives messages, puts a notation in the queue(s).

My main thread polls the queue, dequeuing any notations it finds.

So there's no enumerating or indexing, I think. Of course, I haven't written it yet... Smile | :)

Re: How to use Queue.Synchronized

Mark Salsbery1-Aug-08 15:12

Mark Salsbery

1-Aug-08 15:12

Multiple writer threads and a single reader thread, right?
The Synchronized() queue should indeed be fine for that.

Cheers,
Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

DataGridView Navigation (i bet it´s easy)

nelsonpaixao1-Aug-08 13:29

nelsonpaixao

1-Aug-08 13:29

Hi,

I have a navigation board(ToolStrip object) above a DataGridView object
I use this code to get data from it.

ToolStripTextBox_Row.Text = DataGridView_Country[0, grid_index].Value.ToString();

Ok, now i want to press Button_NextRow (in navigation board) and
set focus to next row in the DataGridView.

How can i do this? Confused | :confused:

How do I make this code display the contents of the stack at the top of the text box.?

Angelinna1-Aug-08 12:15

Angelinna

1-Aug-08 12:15

It is currently displaying the stack upside down, the contents of the top of the stack are displayed as the last line in the text box. I am trying to make this code display the contents of the stack at the top of the text box. Cry | :((

private void displayStack()
{
string nextItem;

displayBox.Clear();
for (int i = 0; i <= stackTop; i++)
{
nextItem = stackArray[i].ToString();
displayBox.AppendText(nextItem);
displayBox.AppendText("\n");

}
}

Re: How do I make this code display the contents of the stack at the top of the text box.?

Guffa1-Aug-08 12:51

Guffa

1-Aug-08 12:51

Just loop the other way.

Despite everything, the person most likely to be fooling you next is yourself.

Re: How do I make this code display the contents of the stack at the top of the text box.?

Angelinna1-Aug-08 13:54

Angelinna

1-Aug-08 13:54

How do I do that? Sleepy | :zzz:

Re: How do I make this code display the contents of the stack at the top of the text box.?

Lim Yuxuan1-Aug-08 17:53

Lim Yuxuan

1-Aug-08 17:53

private void displayStack()
{
string nextItem;

displayBox.Clear();

// doing it the other way like guffa said
for (int i = stacktop; i >= 0; i--)
{
nextItem = stackArray[i].ToString();
displayBox.AppendText(nextItem);
displayBox.AppendText("\n");
}
}

instead of starting from bottom value of your stack,(originally your intial conditon is int i = 0) you are now starting at the max value of your stack.

Instead of stopping the loop when your variable "i" reaches "stacktop" (top of your stack), the loop stopped at "i = 0"(bottom of your stack).

Because of the above 2 statements, i++ have to change to i-- since you are starting from top to bottom now.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.