Re: checking for file existence - C# Discussion Boards

salman_syed_0131-May-07 4:02

31-May-07 4:02

I am using Publish Feature of Microsoft Visual Studio 2005(Visual C#) , I can easily Publish and install the updates with one click, BUT the PROBLEM is that it downloads the updates under the Logged-on user profile as C:\Documents and Settings\salman\Local Settings\Apps\2.0\MZ4LCEX9.335\8Q3D2HW5.Q2O\manifests\....
Whereas, i want to specify a download location during publishing the project.
Please help me this is very very urgent.
thanks.

remove the datagridview "pointer"

FernandoMartin31-May-07 3:54

FernandoMartin

31-May-07 3:54

Hello,

i'd like to remove the pointer of the datagridview, i don't know exactly the name of that.

look the picture:
http://img105.imageshack.us/my.php?image=pointerua1.jpg

thank you !!

Re: remove the datagridview "pointer"

Not Active31-May-07 5:22

Not Active

31-May-07 5:22

Don't keep reposting the same question.

only two letters away from being an asset

Re: remove the datagridview "pointer"

FernandoMartin31-May-07 5:31

FernandoMartin

31-May-07 5:31

the other post was deleted

Re: remove the datagridview "pointer"

Tarakeshwar Reddy31-May-07 6:44

Tarakeshwar Reddy

31-May-07 6:44

FernandoMartin wrote:
i'd like to remove the pointer of the datagridview, i don't know exactly the name of that.

Set the RowHeadersVisible property of the DataGridView to False

Re: remove the datagridview "pointer"

FernandoMartin31-May-07 7:37

FernandoMartin

31-May-07 7:37

oh, thanks a lot man

checking for file existence

ploxy31-May-07 3:27

ploxy

31-May-07 3:27

how can i code to check for the existence of a particular text file in a drive and then call for a dialogue form if the file does not exist

ma coding life

Re: checking for file existence

Martin#31-May-07 3:34

Martin#

31-May-07 3:34

Hello,

ploxy wrote:
how can i code to check for the existence of a particular text file in a drive

Have a look at System.IO.File namespace and "Exists" method.

ploxy wrote:
and then call for a dialogue form if the file does not exist

The System.Windows.Forms.MessageBox with it's static "Show" method will do that.

Hope it helps!

All the best,

Martin

Re: checking for file existence

Luc Pattyn31-May-07 5:04

Luc Pattyn

31-May-07 5:04

if (!File.Exists(filename)) {
    filename=null;
    using (OpenFileDialog dlg=new OpenFileDialog()) {
        ... dlg properties = values;
        if (dlg.Show()==DialogResult.OK) filename=dlg.FileName;
    }
}
if (filename!=null) ... // read the file

Luc Pattyn

[My Articles] [Forum Guidelines]

referencing from C: or D: drive

ploxy31-May-07 3:21

ploxy

31-May-07 3:21

i wrote a little application that install a particular file in drive C. on installing the application on D drive,i had problem calling the file.how can i code for the file to be referenced irrespective of its installation path

ma coding life

Re: referencing from C: or D: drive

kubben31-May-07 5:07

kubben

31-May-07 5:07

The only idea I can think of involves creating a share folder where you write the file to. Then you could access the file via the share name. So it would be something like:
\\computername\sharefoldername\file

Of course the down side to this is you need to know the computer name, but that isn't real hard to figure out.

Hope that helps.
Ben

Re: referencing from C: or D: drive

Not Active31-May-07 5:21

Not Active

31-May-07 5:21

only two letters away from being an asset

Re: referencing from C: or D: drive

kubben31-May-07 5:31

kubben

31-May-07 5:31

I like your answer, but the way I understood the question was that you wouldn't know for sure which drive the file is on. (Of course, that is a little weird/ bad design) So if you don't know the drive letter you could acces it through a share. I suppose sometimes I think too much of answering the question instead of pushing for a better design. My fault.

Ben

Re: referencing from C: or D: drive

snorkie31-May-07 8:28

snorkie

31-May-07 8:28

If the file is on the same drive that the application is on, could you use

Environment.CurrentDirectory

to figure out which drive you are on. the use relative paths from there to get to your file.

Hogan

Re: referencing from C: or D: drive

Dave Kreskowiak31-May-07 8:41

Dave Kreskowiak

31-May-07 8:41

That's a really bad idea. CurrentDirectory is NOT guaranteed to stay that way. Try opening any of the File/Folder dialogs and watch what happens to the current directory during the life of the dialog AND after the dialog. The current directory changes while the user navigates to pick files/folders. The current directory will not return to the original directory when the dialog was shown until after the dialog is dismissed AND the dialog object is told to reset the current directory to what it was when it was shown.

Meanwhile, during the users navigation of the file system, the current directory always changes to match where the user is navigating. If you have a multithreaded app that mistakenly depends on current directory, you've got a huge problem!

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: referencing from C: or D: drive

snorkie31-May-07 9:01

snorkie

31-May-07 9:01

Thanks for the info. I didn't know that!

Hogan

Re: referencing from C: or D: drive

Not Active31-May-07 5:20

Not Active

31-May-07 5:20

If you install the file in the same folder, or below, as the exe then you can reference it from there.

InstallDir: d:\MyApp
File path: myfile.txt

InstallDir: d:\MyApp\Files
File path: /files/myfile.txt

only two letters away from being an asset

Re: referencing from C: or D: drive

Dave Kreskowiak31-May-07 5:56

Dave Kreskowiak

31-May-07 5:56

How about looking at Application.StartupPath, or Path.GetDirectoryName(Assembly.GetExecutingAssembly.Location).

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: referencing from C: or D: drive

Luc Pattyn31-May-07 9:56

Luc Pattyn

31-May-07 9:56

Hi,

I am a bit surprised by the answers so far.

For starters you cant hard code C: or D: or whatever.
C: does not even have to exist; I have seen systems that boot and run from D:

Second, you cant use CurrentDirectory, as Dave pointed out.
You can not even use it if you store its startup value,
since one may start an app with its CD preset to whatever value one chooses
(try creating a desktop link, and watch its properties).

third, wherever the app (the exe file) is located, you are not guaranteed that
you can write to that folder. Unless your normal use is only reading that file,
you should choose another place.

The easy way out is by using the special folders, as can be found in
the Environment.SpecialFolder enumeration; you will find some that are
user-independent, others are user-specific.

So I suggest reading up on that class.

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

DrawToolsRedux, but in OpenGl

a_david12331-May-07 2:49

a_david123

31-May-07 2:49

Dear All
Regards!

I found what i want on the link

http://www.codeproject.com/useritems/DrawToolsRedux.asp

but i want the above DrawToolsRedux in OpenGl, i mean that for all drawing part using OepnGL instead CSharp Drawing.

so kindly any 1 who convert the above DrawToolsReduc into OpenGl.

Regrds
David

david

Using GetMessage in C#

gapfulgence31-May-07 2:46

gapfulgence

31-May-07 2:46

Hi,

I'm working on inter-process communication between a C++ application and a C# application. I want to transfer string data between them. I'm being blocked by a problem: I don't know how to intercept data (sent from my C++ app) in my C# app. I read I can use GetMessage function, but I dont know how. Here is how I send data from my C++ app to my C# one:

LRESULT copyDataResult;

//CWnd *pOtherWnd = CWnd::FindWindow(NULL, m_otherAppHeader.GetBuffer(m_otherAppHeader.GetLength()));
CWnd *pOtherWnd = CWnd::FindWindow(NULL, "EC");
m_otherAppHeader.ReleaseBuffer();
if (pOtherWnd) {
// Say that we fount ExperienceCreator window
AfxMessageBox("ExperienceCreator is opened.");

COPYDATASTRUCT cpd;
cpd.dwData = 0;
CString txt;
c_TxText.GetWindowText(txt);
cpd.cbData = txt.GetLength() + 1 ;
cpd.lpData = (void*)txt.GetBuffer(txt.GetLength() +1);
copyDataResult = pOtherWnd->SendMessage(WM_COPYDATA,
(WPARAM)AfxGetApp()->m_pMainWnd->GetSafeHwnd(),(LPARAM)&cpd);
txt.ReleaseBuffer();
// copyDataResult has value returned by other app

AfxMessageBox("Info has been sent to ExperienceCreator");

} else {
//AfxMessageBox("Unable to find other application.");
AfxMessageBox("Unable to find EC.");
}

Can you please help me for this problem ?

Thanks.

p.f. Goudjo-Ako

Bringing our energy together !

Re: Using GetMessage in C#

kubben31-May-07 3:00

kubben

31-May-07 3:00

Just curious why would you want to send a string message between the applications? Sending windows messages would be much more standard way of communicating between applications.

Ben

Re: Using GetMessage in C#

gapfulgence31-May-07 4:19

gapfulgence

31-May-07 4:19

You're right. I didn't explain myself correctly.

What I want to do is send string data using windows messages.

Thanks !

p.f. Goudjo-Ako

Bringing our energy together !

Re: Using GetMessage in C#

kubben31-May-07 4:22

kubben

31-May-07 4:22

Here is an article I wrote that has two .net applications sending and receiving windows messages.
http://www.codeproject.com/dotnet/windowsappsingleinstance.asp[^]

Hope that helps.
Ben

Re: Using GetMessage in C#

gapfulgence31-May-07 6:11

gapfulgence

31-May-07 6:11

Thanks Kubben !

Pat.

p.f. Goudjo-Ako

Bringing our energy together !

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