C# Discussion Boards - CodeProject

Determining time of query end

9-Jan-07 11:54

Just checking, is your env path the same for everyone ?

And is it set before the service gets started ?

-- modified at 18:04 Tuesday 9th January, 2007

Luc Pattyn

sopho249-Jan-07 7:07

sopho24

9-Jan-07 7:07

How can I code for controlling end of a database query and command? Assume I must run a messagebox when query finished certainly. How can I be sure query was finished (in code) ?

Re: Determining time of query end

btsrinath9-Jan-07 12:00

btsrinath

9-Jan-07 12:00

Do u mean to say you need to collect the time stamp ? before and after query execution ?

writing in a file

netJP12L9-Jan-07 6:12

netJP12L

9-Jan-07 6:12

I have a class inhertied from PrintDocument in that I am trying to write in a file while am in printpage event handler. The problem is that the file gets created but there is not text/data. Is it even possible to do.

protected void ThePrintDoc_PrintPage (object sender,PrintPageEventArgs ev)
{
StreamWriter sw =new StreamWriter(new FileStream("path.txt", FileMode.Create, FileAccess.Write));
sw.Write("hello");
sw.Close();

}

WillemM9-Jan-07 6:17

WillemM

9-Jan-07 6:17

Could be because the file doesn't get closed properly. Does the data appear after the application exits?

WM.

What about weapons of mass-construction?
"You can always try to smash it with a wrench to fix that. It might actually work" - WillemM

netJP12L9-Jan-07 6:29

netJP12L

9-Jan-07 6:29

no. if i apply the same codes in a non inherited PrintDocument then i can see the file with data but if i wrote same in PrintDocument class means
(public class TextPrintDocument : PrintDocument) then i don't see
Thanks

WillemM9-Jan-07 7:04

WillemM

9-Jan-07 7:04

Did you do the following inside your class??

public class TextDocument: PrintDocument {
public TextDocument()
:base()
{
PrintPage += new PrintPageEventHandler(ThePrintDoc_PrintPage);
}

protected void ThePrintDoc_PrintPage (object sender,PrintPageEventArgs ev)
{
StreamWriter sw =new StreamWriter(new FileStream("path.txt", FileMode.Create, FileAccess.Write));

sw.Write("hello");
sw.Close();
}
}

It could be that your method wasn't hooked up to the printpage event of the PrintDocument class, which you inherit from.

WM.

What about weapons of mass-construction?
"You can always try to smash it with a wrench to fix that. It might actually work" - WillemM

Dave Kreskowiak9-Jan-07 6:28

Dave Kreskowiak

9-Jan-07 6:28

Try calling your StreamWriter's Flush() method before you try and read the file:

protected void ThePrintDoc_PrintPage (object sender,PrintPageEventArgs ev)
{
    StreamWriter sw =new StreamWriter(new FileStream("path.txt", FileMode.Create, FileAccess.Write));
    sw.Write("hello");
    sw.Flush();
    sw.Close();
}

Dave Kreskowiak
Microsoft MVP - Visual Basic

Luc Pattyn9-Jan-07 7:21

9-Jan-07 7:21

Hi,

your 3 lines of StreamWriter code work fine inside one of my PrintPage methods.

some possibilities:
- your file already exists and is read-only or locked by another process
- you ar looking at the wrong file (using a relative path, and current directory maybe changed)
- you are getting an exception but missed it somehow

Smile | :)

Luc Pattyn

netJP12L9-Jan-07 8:43

netJP12L

9-Jan-07 8:43

Thank you all, It was putting in a wrong folder. so i just have the absolute path now.
This leads to my next question which is if i try to write in a file then there is no data in a file but if comment the loop then there is something.
I want to write in a file until i<5. is there something i am not doing right.

for(int i=0;i<5;i++)
{
sw = new StreamWriter(@"C:\myfolder\path.txt");
sw.writeLine(i.ToString());
sw.flush();

}
sw.close;

Thanks

Martin#9-Jan-07 9:09

9-Jan-07 9:09

Hello,

I'm not sure if it's usefull to create a new instance of StreamWriter (in youre case 5) inside the for loop.
If yes, you would have to call the close method also in the loop, otherwise only the last StreamWriter instance would be closed (disposed).
If not, you should do this:

sw = new StreamWriter(@"C:\myfolder\path.txt");
for(int i=0;i<5;i++)
{
    sw.WriteLine(i.ToString());
    sw.Flush();
}
sw.Close();

All the best

Martin

Luc Pattyn9-Jan-07 9:47

Value of SW_SHOWNOACTIVATE!!!

9-Jan-07 9:47

Yes, you should create only one streamwriter, then have the loop, or whatever makes
up the file's content, then sw.Close().

And sw.Flush() is not doing anything useful here.
It is useful only when the content generation takes a long time, so you
want to force the sw to already send to file what it currently contains; it is
impled by a sw.Close(): when closing the sw, everything it still holds is flushed,
i.e. sent to the file.

If you are used to C (or some similar language), you can compare the StreamWriter you
are using to a regular file with functions fopen, fwrite, fclose (and optionally fflush).

Smile | :)

Luc Pattyn

kmuthuk9-Jan-07 4:19

kmuthuk

9-Jan-07 4:19

What is the correct value for SW_SHOWNOACTIVATE in ShowWindow function? Is it 0x0700 or 12? Do I have to give in hexadecimal or decimal?

Can anyone please help me find this?

Muthu.

Luc Pattyn9-Jan-07 4:27

9-Jan-07 4:27

File C:\...\VC98\Include\WINUSER.H Line 257: #define SW_SHOWNOACTIVATE 4

Smile | :)

Luc Pattyn

kmuthuk9-Jan-07 4:28

kmuthuk

9-Jan-07 4:28

I am sorry. I am using C#, Framework 1.1

Thanks.

Muthu.

Luc Pattyn9-Jan-07 4:39

9-Jan-07 4:39

The symbol SW_SHOWNOACTIVATE does not look at all like a C# name, it really is part
of the good old Win32 API specifications.

Whatever you do at a high level, in whatever language, in the end the UI stuff gets
handled deep down in Windows so when you do some magic that is supposed to understand
SW_SHOWNOACTIVATE, just pass it the value of 4.

Smile | :)

Luc Pattyn

WAV file management [modified]

Pete O'Hanlon9-Jan-07 4:27

Pete O'Hanlon

9-Jan-07 4:27

I believe that it is actually 4, and it doesn't matter whether or not it is hex.

the last thing I want to see is some pasty-faced geek with skin so pale that it's almost translucent trying to bump parts with a partner - John Simmons / outlaw programmer

Deja View - the feeling that you've seen this post before.

Amit D9-Jan-07 4:09

Amit D

9-Jan-07 4:09

Hello,

Can anyone please help me to write code (language: any .Net platform) to append text to a WAV file?

I know the basic file I/O all I need is to know how to write proper header information in the WAV file along with proper byte count which includes the actual WAV file and newly appended text at the end.

Found this link: http://www.codeproject.com/useritems/Concatenation_Wave_Files.asp

But in this example the program amalgamates 2 WAV files as in my case its 1 WAV file + 1 text file = 1 WAV file with all information in it.

Thank you in anticipation.

Regards,
Amit

-- modified at 9:17 Monday 15th January, 2007

Hi.............

Exelioindia9-Jan-07 3:37

Exelioindia

9-Jan-07 3:37

Hi all,

I am developing an window application using c#.net. I want to deploye the project.While deploying the project i have some doubts that is, While installing the the product the Framework should be checked and to be installed also the MSDE, and a windows service.

Also if the setup has to check for the update. I want to create this using the .NET default Deployment Wizard, can any one suggest me how to do this with an example or any tutorials for this??

I am having an major doubt that is it possible to install Framework, MSDC and the Product in Mac and Linx OS.

Thanks in advance

Know is Drop, Unknown is Ocean

Re: Hi.............

Rob Graham9-Jan-07 3:56

Rob Graham

9-Jan-07 3:56

Exelioindia wrote:
I am having an major doubt that is it possible to install Framework, MSDC and the Product in Mac and Linx OS.

With good reason. .Net is not compatible with MAC and Linux. There is a port (Mono), but not all .Net functionality is supported by Mono. MSDE is not supported on Mac/Linux. You will need a different database for those.

Re: Hi.............

Not Active9-Jan-07 3:58

Not Active

9-Jan-07 3:58

First, try using a better title then Hi..... Mad | :mad:

How to get an answer to your question

If you use the default setup project for .net it will do the check and install the appropriate framework for you. Also, you want to use SQL Express which is the replacement to MSDE.

See the section "Investigating Installers" here for a short discussion of installing a service
http://msdn.microsoft.com/msdnmag/issues/01/12/NETServ/[^]

Exelioindia wrote:
I am having an major doubt that is it possible to install Framework, MSDC and the Product in Mac and Linx OS.

You're right. Mac, why would you want to anyway. Linux you would need to make use Mono

only two letters away from being an asset

actual Subversion Revision [modified]

Martin#9-Jan-07 3:35

Re: actual Subversion Revision

9-Jan-07 3:35

Hello,

I have my VS2003 Project under Subversion control and wanted to find out (per code) which revision number has my project.

I tried:
NSvn.Core.Revision rev = NSvn.Core.Revision.Head;
NSvn.Core.ClientConfig clientcfg = new ClientConfig();
NSvn.Core.Client client = new Client(mypath);
I also looked into:
NSvn.Common

No luck so far (also google hasn't helped me this time.)

Thanks for your time and help!

All the best,

Martin

-- modified at 9:44 Tuesday 9th January, 2007

Daniel Grunwald9-Jan-07 6:06

Daniel Grunwald

9-Jan-07 6:06

Here's how to get the BASE revision (the revision a working copy contains) - I use this to generate the version number for the AssemblyInfo file in the pre-build-task:

Client client = new Client();
int revision = client.SingleStatus(workingDirectory).Entry.Revision;

This operation does not contact the server, it simply looks at the .svn folder.

Getting the HEAD revision might work similar (but you have to contact the repository), try to get the status of the repository URL.

Re: actual Subversion Revision

Martin#9-Jan-07 8:35

Re: actual Subversion Revision

9-Jan-07 8:35

Hallo Daniel,

Thank you very much for your answer!

I think this is exactly what I needed!
I will test it soon.

Thanks again!

All the best,

Martin

Martin#9-Jan-07 9:25