FileSystemWatcher - File used by another process - C / C++ / MFC Discussion Boards

Christian Graus14-Jun-05 1:21

14-Jun-05 1:21

Is your name really Candy, or did you just think that was a name that would get guys to help ? :P

Seriously, the web is full of help, there is at least one article on this site, and your textbooks should be loaded with info also. However, by all means if you read your textbook and you're stuck on *specific* things, feel free to ask, whatever your name is....

Christian Graus - Microsoft MVP - C++

Re: need help!! please help me..

Bob Stanneveld14-Jun-05 3:32

Bob Stanneveld

14-Jun-05 3:32

Christian Graus wrote:
Is your name really Candy, or did you just think that was a name that would get guys to help ?

And no, I didn't answer because the name was Candy... Roll eyes | :rolleyes:

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: need help!! please help me..

c_ngo15-Jun-05 15:30

c_ngo

15-Jun-05 15:30

yes my name is really Candy Smile | :)

thanks for the help..i really appreciated it

Re: need help!! please help me..

c_ngo15-Jun-05 15:35

c_ngo

15-Jun-05 15:35

thank you so much guys! i really appreciated all the help!! by the way..no i did not use the name Candy so that i could get guys to help me because my name is really Candy..tnx! Smile | :)

How to remove close button from window?

amrutajoshi13-Jun-05 20:36

amrutajoshi

13-Jun-05 20:36

How to remove close button from window?I just want maximize and minimize buttons on window.if it is not possible to remove close button can i make it disable?
I have tried it using WS_MAXIMIZEBOX and WS_MINIMIZEBOX .But it is not working.

Re: How to remove close button from window?

Bob Stanneveld13-Jun-05 23:58

Bob Stanneveld

13-Jun-05 23:58

Hello,

I don't think that there is an easy way to remove the close button, since it's part of the system menu. You can use GetSystemMenu() to disable it..

You can also remove the entire title bar.

But please tell me why you want to remove the close button? Users will be really annoyed by this!

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: How to remove close button from window?

Stlan14-Jun-05 0:01

Stlan

14-Jun-05 0:01

Try this: GetSystemMenu(FALSE)->EnableMenuItem(SC_CLOSE, FALSE);

FileSystemWatcher - File used by another process

g3e13-Jun-05 23:36

g3e

13-Jun-05 23:36

Hi,
I've written a windows service to parse files.It uses the FileSystemWatcher class in C# to sniff a folder for particular type of files. But when the files were being processed, i repeatedly get the error "The process cannot access the file "AAA" because it is being used by another process". To overcome this problem, i added the following. lines of code

<br />
<br />
public bool ParseEnvFile(string strFilePath)<br />
{<br />
			try<br />
			{<br />
				using(FileStream fs = new FileStream(strFilePath, FileMode.Open, FileAccess.Read, FileShare.Read))<br />
				{<br />
					// Do some processing here<br />
					fs.Close();<br />
					m_nReadAttempts = 0;<br />
				}<br />
			}<br />
			catch(IOException ex)<br />
			{<br />
				if(m_nReadAttempts < 3)<br />
				{<br />
					Thread.Sleep(2000);<br />
					m_nReadAttempts++;<br />
					return ParseEnvFile(strFilePath);<br />
				}<br />
				else<br />
				{<br />
					throw ex;<br />
				}<br />
			}<br />
.....<br />
}<br />

But even this did not solve the problem. The exception still kept coming, though less frequently.
So I was forced to add a Timer event(runs every 5 mins) that would pick up all the files that were left over because of the exception.
Now, my problem is this:
When a file gets created in the folder, sometimes both the OnFileCreated event and the timer event try to access the file at the same time. Within my
service, I'm required to open the file in write mode and update some contents. I find that at times the file that gets created ends up as a 0KB file (Note: when it initially got created the file had some content in it)!!!!

Any ideas on why this happens?
Thanks for any help in resolving this problem.

how to change debug options?

ThinkingPrometheus13-Jun-05 23:35

ThinkingPrometheus

13-Jun-05 23:35

hiho@ll

i'm using Visual Studio .Net

1. i have compiled/runned/debugged many "self-made" projects and some projects from codeproject.com

2. i got the source of a programm which i want to debug, which seems to be programmed using visual studio 6.0

3. if i try to debug the prog i get the following error:
"
Unable to start debugging.
Unable to start program "c:\program files\internet explorer\iexplore.exe"
Das System kann die angegebene Datei nicht finden.
"

4. it seems that .net tries to debug using iexplore.exe in program files folder
but my iexplore.exe is in programme\Internet Explorer\...

question: how can i change the debug options for this project that .Net knows that iexplore.exe is not in program files\ but in programme\ folder?

thx@ll

Exe to Dll

Hemoji13-Jun-05 23:30

Hemoji

13-Jun-05 23:30

Hi,

I have a project built on winsock2, it listens to a particular port and responds to client requests. Its a customized Server for our needs.

I got to port it to DLL and invoke this in VB. How do I do this?

Any suggestions?

thanks in advance.

Hemo

Re: Exe to Dll

Rick York14-Jun-05 10:12

Rick York

14-Jun-05 10:12

Have a look at this : http://support.microsoft.com/kb/106553/EN-US/[^]

e trefreshes the BitMap image

a_david12313-Jun-05 23:17

a_david123

13-Jun-05 23:17

Respecte All

Regards!
I am a new one to VC++ and learning phase.
I haev a problem

" i loaded a bitmap on a bialogbox but when i minimiz the Runtime window and then when i maximize the Runtime window then the Bitmap is not here on the runtime window.
I dont understand what's the problem.
Kindly guide me.

Bset Wishes

David

david

Re: e trefreshes the BitMap image

Christian Graus14-Jun-05 1:24

Christian Graus

14-Jun-05 1:24

Where did you paint the bitmap onto the dialog ? You need to do it in either OnEraseBackground, or OnPaint.

Christian Graus - Microsoft MVP - C++

Re: e trefreshes the BitMap image

a_david12315-Jun-05 20:27

a_david123

15-Jun-05 20:27

Thanks Sir

I am loading Bit Map directly on Dialog and that's why I think problem are coming
"but how i do it on OnPaint?"

Best wishes
David

david

Re: e trefreshes the BitMap image

Christian Graus16-Jun-05 12:08

Christian Graus

16-Jun-05 12:08

Load the Bitmap into a Bitmap as a member variable in the class, override the OnPaint method of the class, and draw it there.

Christian Graus - Microsoft MVP - C++

"AfterEdit" event not getting called

Pazzuzu13-Jun-05 23:00

Pazzuzu

13-Jun-05 23:00

Hi All,

I have developed an MFC application with 2 views & a dialog window,all of which are dockable.So it looks more like when we open our microsoft Vc++ application.

The messaging system was taken care by a collegue of mine,who used "RunModalLoop" function for handling windows messages. Thats why this post.
My dialog window contains a Grid control.When I make a change in one of the cells in the grid & go & hit any of the toolbar buttons or menu items,the after edit event of the grid is not getting called. when I click on any of the views,the afteredit event is getting called,which is what I need.

What could be reason that the "AfterEdit" event is not getting called(when Hit on toolbar buttons & Menu Items).Does this has anything to do with "ModalLoop" calls.

Thanks for any help...

Spawning

Kash13-Jun-05 22:19

Kash

13-Jun-05 22:19

Hi,
My GUI is required to call a code that is a console application. The progress is displayed in the console. My GUI button calls this code fine and data is written correctly. The problem is I don't see the console from the button call and the user has no idea when the routine has completed. Would this be something to do with CreateProcess()? I know that this function can be used to call applications but what about subroutines?
Thanks.
Kash

Re: Spawning

David Crow14-Jun-05 3:18

David Crow

14-Jun-05 3:18

Using CreateProcess() is the correct method. However, I would make the console window hidden, and capture the text that is written to it in my GUI window. See here and here.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Dynamically Change Menu Text

sweep12313-Jun-05 21:52

sweep123

13-Jun-05 21:52

I would like to toggle sound in my program via a Menu item.

I have included a Menu option and event as follows, but how can I either set the Menu text 'checked' or change it to read:

Sound On or Sound Off.

void CExampleDlg::OnSystemSound()
{
	/* Toggle the sound On/Off. The default state is On.	*/
	if(g_bSound)
	{
		g_bSound = false;
		SetDlgItemText(ID_SYSTEM_SOUND, "Sound Off");
	}
	else
	{
		g_bSound = true;
		SetDlgItemText(ID_SYSTEM_SOUND, "Sound On");
	}
}

Where ID_SYSTEM_SOUND is the Menu item. Can you declare a member variable for this Menu item? I saw no options in the Class Wizard.

But the Menu always displays the default text (Sound On); i.e. never changes.

Re: Dynamically Change Menu Text

Weiye Chen13-Jun-05 22:44

Weiye Chen

13-Jun-05 22:44

I believe you need to call CWnd::GetMenu(...) which returns a CMenu*. Check out the member functions in that class.

<font=arial>Weiye Chen
Life is hard, yet we are made of flesh...

Re: Dynamically Change Menu Text

Nilesh K.13-Jun-05 23:01

Nilesh K.

13-Jun-05 23:01

Check this[^] article on menu.

<bold>- Nilesh
<italics>"Reading made Don Quixote a gentleman. Believing what he read made him mad" -George Bernard Shaw

Re: Dynamically Change Menu Text

sweep12313-Jun-05 20:24

sweep123

13-Jun-05 20:24

Thanks for your post. Will read the article.

Got code working:-

if(g_bSound)
{
	g_bSound = false;
	CheckMenuItem(m_MyMenu, ID_SYSTEM_SOUND, MF_UNCHECKED);
}
else
{
	g_bSound = true;
	CheckMenuItem(m_MyMenu, ID_SYSTEM_SOUND, MF_CHECKED);
}

i want ask about this code

kosamoza13-Jun-05 20:47

kosamoza

13-Jun-05 20:47

i wrote this code about the Matrix project here is a part of the code to input the matrix or a vector with a dynamic allocation:
double*vector ; int num ;
cout<<"enter the size of the vector"<<\n;
cin>>num;
vector=new double[num];
for(i=0;i<num;i++)
{
cout<<"enter="" the="" element"<<i+1<<"in="" vector"<<\n;
="" cin="">>*(vector+i)
}
this for input the vector but for input the matrix i made it in another function:
double*grade ; double**matrix ; int row ; int col;
cout<<"enter the number of rows then coloumns in the matrix"<<\n;
cin>>row>>col;
double**matrix=new double*[row];
for(int j=0;j<row;j++)
{
matrix[j]="new" double[col]
="" for(int="" k="0;" k<row;="" k++)
{
="" for(="" int="" l="0;" l<col;="" l++)
{=""
="" cout<<"enter="" the="" element"<<l+1<<"in="" row"<<k+1<<\n;
="" cin="">>*(grade[k]+l)
}}}
iwant to ask of there is any missing in the followin part of the code
second if i want the program to ask the user if he wants to input one or more matrix can i add this :
for(int c=o;c<n;c++) where="" n="" is="" the="" number="" of="" matrices="" user="" want="" to="" input="" i="" put="" all="" previuos="" for="" loops="" in="" this="" loop="" but="" withmall="" change="" as="" folows
in="" stead="" writing="" matrix[j]i="" will="" write
matrix[c][j]="new" double[col]
&="" instead="" cin="">>*(grade[k]+l) i will write
cin>>*(grade[c][k]+l)
so may you answer these previous questions?

Re: i want ask about this code

Nilesh K.13-Jun-05 21:21

Nilesh K.

13-Jun-05 21:21

Use code tag to format the code,
It is difficult to differentiate between your code and comments!

<bold>- Nilesh
<italics>"Reading made Don Quixote a gentleman. Believing what he read made him mad" -George Bernard Shaw

Re: i want ask about this code

kosamoza13-Jun-05 22:14

kosamoza

13-Jun-05 22:14

sorry but i dont understand u what do u mean with code tag
do u mean #include<iostream.h>
do u mean something like this
i dont understand what u want sorry
dont u understand my questions?

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