C# Discussion Boards - CodeProject

visual studio .NET 2003 add-in. Events don't do the expected

alexrait15-Jan-06 6:01

5-Jan-06 6:01

I am quite desperate with this, hopefully someone might help here:
So I have created my own add-in for visual studio. Now I want to catch the event of "line change". That is when the user no longer edits some line and moves to another.
In the "OnConnection" method of the addin, I add this line:

applicationObject.Events.get_TextEditorEvents(null).LineChanged+=new _dispTextEditorEvents_LineChangedEventHandler(Connect_LineChanged);

and in the handler I open a messagebox.

The problem is, that the add-in works perfectly, untill... I open a new XML file!!
then it stops working in any of the documents...
Am I doing something wrong?

Can't compile Windows Media Audio compressor

crozer5-Jan-06 5:37

crozer

5-Jan-06 5:37

Hi,
I cannot compile the source code of the Windows Media Audio compressor articel.
I tried this a few times and very different things. I tried to add references of the need DLLs, but it only crashes. I don't have the Visual Studio, only Visual C++.NET 2003, Visual C# 2005.

Is there anyone who have the compiled DLL? I need the yeti.wmf!
Please help me! Thanks.

C# Job

ashishdhar5-Jan-06 4:48

ashishdhar

5-Jan-06 4:48

Looking for some C# developers with C++ background to work on an exiting and challenging project.
Send resumes to ashish.dhar.b@bayer.com

Re: C# Job

Guffa5-Jan-06 5:13

Guffa

5-Jan-06 5:13

Please don't double post.

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Re: C# Job

Colin Angus Mackay5-Jan-06 9:03

Colin Angus Mackay

5-Jan-06 9:03

ashishdhar wrote:
work on an exiting and challenging project

The last time I was looking for a job I discovered that this was a euphamism for "we're going to give you lots of work in areas your not qualified for and give you no training and we want everything done by next Tuesday even although we realise that it is a 3 month project"

The jobs that are genuinely exiting don't need people to state they are exiting because it is obvious from the description. Jobs that are challenging are ones that allow the individual to grow as a person, and again that is obvious from the description.

However, since your description is "exciting and challenging" there isn't much to work with and I suspect that, quite probably, they'll turn out to be dull and tiresome.

So, prove me wrong - tell us what the job really is!

ColinMackay.net
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

Re: C# Job

Christian Graus5-Jan-06 10:34

Christian Graus

5-Jan-06 10:34

I'm a C# developer, with a C++ background. I'm a C++ MVP, as it happens. I love to work on projects that are 'exciting and challenging', so perhaps if you'd like to tell us what it is, you'll get resumes from people who are more in your app domain. Of course, advertising through a question board leaves me worried about your budget, but I always ask for 50% up front, as would anyone worth hiring, IMO. It's a simple concept of shared risk.

Christian Graus - Microsoft MVP - C++

Re: C# Job

Ravi Bhavnani5-Jan-06 13:34

Ravi Bhavnani

5-Jan-06 13:34

ashishdhar wrote:
to work on an exiting and challenging project

If the project is exiting, why are you hiring? Confused | :confused:

/ravi

My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Re: C# Job

Sebastian Schneider5-Jan-06 23:10

Sebastian Schneider

5-Jan-06 23:10

No offense, but:
Exiting as in "interesting", NOT as in "exit".

Cheers,
Sebastian

--
Contra vim mortem non est medicamen in hortem.

Re: C# Job

Ravi Bhavnani6-Jan-06 1:31

Ravi Bhavnani

6-Jan-06 1:31

I know. I deliberately ignored the spelling error (should be "exciting"). Smile | :)

/ravi

My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Re: C# Job

TAREQ F ABUZUHRI6-Jan-06 3:55

TAREQ F ABUZUHRI

6-Jan-06 3:55

i ready to work with u Smile | :)

Palestine

Re: C# Job

ashishdhar10-Jan-06 14:56

ashishdhar

10-Jan-06 14:56

The project is EXITing the "I have a dream" phase and entering a "lets get real and get this thing done" phase. Wink | ;)

Small XML problem

Martin235-Jan-06 4:37

Martin23

5-Jan-06 4:37

Hi, I have made a small program that opens a data file in XML format, then searches through it for certain information, the problem I have is that if the first line of the XML text looks like;

<data xsi:schemaLocation="http://www.website.com" version="0.3" xml:lang="en">

it doesnt work, but if I change it so the first line is simply;

<data>

It does work.

The problem is that the data comes in the first way, which doesnt work for me, can anyone explain why it might be that this happens? I assume it is a simple, seeing as how I can fix it by simply removing a small amount of text.

(p.s. I am fairly new to XML so forgive me if this is really dumb!)

thanks in advance!

-- modified at 10:39 Thursday 5th January, 2006

Re: Small XML problem

Guffa5-Jan-06 5:34

Guffa

5-Jan-06 5:34

Standard question #1:
What do you mean by "not working"?

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Re: Small XML problem

Martin235-Jan-06 6:06

Martin23

5-Jan-06 6:06

Ok good point!, this is an example;

private void button4_Click(object sender, EventArgs e)
{
StreamReader sr = new StreamReader(@"data.xml");
XmlTextReader xr = new XmlTextReader(sr);
XmlDocument docData = new XmlDocument();
docData.Load(xr);

XmlNodeList wikinodes = wiki.SelectNodes("data/page");

lblNodes.Text = dataNodes.Count.ToString();
}

When it works, lblNodes will show there are 1699 nodes, when it doesnt work it just says there are 0 nodes.

The XML file looks roughly like this;

<data xsi:schemaLocation="http://www.website.com" version="0.3" xml:lang="en">
<page>informationhere</page>
<page>informationhere</page>
<page>informationhere</page>
</data>

but will only work if I change it to look like this;

<data>
<page>informationhere</page>
<page>informationhere</page>
<page>informationhere</page>
</data>

I hope that is enough info, Thank you!

Re: Small XML problem

Guffa5-Jan-06 7:19

Guffa

5-Jan-06 7:19

Try with the "/data/page" xpath instead.

Otherwise, it might be the schema that removed the nodes. Does the schema that the data references to exist?

Check the contents of the InnerXml property once the document is loaded, to see if the page nodes gets loaded at all.

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Re: Small XML problem

Martin235-Jan-06 9:11

Martin23

5-Jan-06 9:11

hhmmm, that didn't work, the page nodes do get loaded though.

The data that I am trying to process comes from the Wikipedia database dump (you know, the open source encyclopedia, see http://en.wikipedia.org/wiki/Main_Page).

I am practising on a small foreign language XML dump which can be downloaded from http://download.wikimedia.org/wikipedia/am/20051020_pages_current.xml.bz2 (the english wikipedia dump is about 3gbs, so you dont exactly want to process that every time you test the program!).

I extracted the exact first line of the XML, which is;

<mediawiki xmlns="http://www.mediawiki.org/xml/export-0.3/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mediawiki.org/xml/export-0.3/ http://www.mediawiki.org/xml/export-0.3.xsd" version="0.3" xml:lang="am">

This includes links to various websites that explain the schema.

I find it strange that it works by simply removing all the attribute material from this first line. I tried programmatically removing this using the Attributes.RemoveAll() method, but as I found out it should really be called RemoveAllButOne(), so that doesnt work either.

Thanks for trying to help, really appreciated, don't worry if don't have the time to go any further though.

Martin

Re: Small XML problem

Guffa9-Jan-06 1:48

Guffa

9-Jan-06 1:48

I see. When you show the complete tag, it's obvious.

You need to use an XmlNamespaceManager object along with the xml document to be able to reach the nodes that belong to a namespace.

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Re: Small XML problem

leppie5-Jan-06 11:37

leppie

5-Jan-06 11:37

You need to setup the XmlNamespaceManager. Has been a long time, but I remember there was a problem with queries on the default namespace, the workaround it to add a dummy alias in your code, then use the in your query.

HTH Smile | :)

^{xacc.ide-0.1.1.4 - now with LSharp integration and scripting :)}

Converting PDF to Text in C#

curtKauf5-Jan-06 4:34

curtKauf

5-Jan-06 4:34

I am having trouble using the code from the tutorial posted here. The following is all of my code. I have commented what the original download version had in it...

using System;
using System.IO;
using org.pdfbox.pdmodel;
using org.pdfbox.util;

namespace Pdf2Text
{
class Program

{

///

/// The main entry point for the application.
///

[STAThread]
static void Main(string[] args)
{
DateTime start = DateTime.Now;
if (args.Length < 2)

{
//The following line is the way it is written in the downloaded version
//Console.WriteLine("Usage: PDF2TEXT ");
//I wrote this
Console.WriteLine("Usage: PDF2TEXT MyPDF.pdf MYTEXT.txt");

//return;
}

using (StreamWriter sw = new StreamWriter(args[1]))
{
sw.WriteLine(parseUsingPDFBox(args[0]));
}

Console.WriteLine("Done. Took " + (DateTime.Now - start));
Console.ReadLine();

}

private static string parseUsingPDFBox(string input)
{
PDDocument doc = PDDocument.load(input);
PDFTextStripper stripper = new PDFTextStripper();
return stripper.getText(doc);
}
}
}

I get the following error message when I try to run it:

"An unhandled exception of type 'System.IndexOutOfRangeException' occurred in Pdf2Text.exe
Additional information: Index was outside the bounds of the array."

Can someone help!

Curt

Re: Converting PDF to Text in C#

Stanciu Vlad5-Jan-06 7:14

Stanciu Vlad

5-Jan-06 7:14

Probably tou get IndexOutOfRangeException when you use args[1] and args[1] is not avaliable. I think that you shoul uncoment this return:

<br />
if (args.Length < 2) {<br />
//...<br />
Console.WriteLine("Usage: PDF2TEXT MyPDF.pdf MYTEXT.txt");<br />
//return;<br />
}<br />

Hope this hepls.

protected internal static readonly ... and I wish the list could continue ...

Re: Converting PDF to Text in C#

curtKauf5-Jan-06 8:51

curtKauf

5-Jan-06 8:51

Thanks for responding! I did that and the console flashes up then disappears and nothing happens beyond that. I'm at loss! If you have anymore suggestion please let me know! Thanks!

Curt

Re: Converting PDF to Text in C#

Stanciu Vlad5-Jan-06 20:53

Stanciu Vlad

5-Jan-06 20:53

I think this happens because you supply an insufficient number of parameters. Try this :

if (args.Length < 2) {<br />
//...<br />
Console.WriteLine("Usage: PDF2TEXT MyPDF.pdf MYTEXT.txt");<br />
Console.ReadLine();<br />
<br />
return;<br />
}

protected internal static readonly ... and I wish the list could continue ...

Queued Timers

LiamD5-Jan-06 3:48

LiamD

5-Jan-06 3:48

I am using the System.Threading.Timer timer.

Now if I have a interval set quite low say 10ms it is possible for my timer event handler to be queued as they cannot be prcessed because the UI thread is busy or another application is running. When the UI thread becomes free it then processes all the queued events at the same time.

Is it possible to determine programmatically the number of timer event handlers that are being queued. I want to be able to determine when there is a build up of queued event handlers.

Some code to demonstrate this would be useful.

Also, is it possible to limit the number of timer event handlers that are queued?

Thanks,
Liam

Re: Queued Timers

Guffa5-Jan-06 4:16

Guffa

5-Jan-06 4:16

You could start a separate thread to do the actual work of the timer, that way the thread that is waiting for the event is never busy. This if course only works if the code is thread safe, as you could have several threads running at the same time.

You can use a counter to see how many threads are running. Increase the counter when a task starts and decrease it when it finishes.

If the code can't be made fully thread safe, you could queue the events yourself to be able to keep track of them. Still using a separate thread to do the work (to keep the main thread response to the events), but don't start a new thread until the previous finishes.

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Re: Queued Timers

Dave Kreskowiak5-Jan-06 4:34

Dave Kreskowiak

5-Jan-06 4:34

I found the question a little odd considering the Timer he's using doesn't use events. It uses a callback delegate executed on a seperate thread out of the thread pool.

So, my question would be, does each tick get its own thread? If so, then in theory, a 10ms time interval could exhaust the thread pool if the callback code takes more than 10ms to execute. What happens to the Timer then? Does the callback get queued up waiting for the thread pool? Does this queue have an upper limit...the size of the stack, maybe?

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

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