Client/server .... please HELP - C / C++ / MFC Discussion Boards

David Crow4-Oct-05 8:27

4-Oct-05 8:27

Alex Cutovoi wrote:
How can I read all lines from a file...

For MFC, look for CStdioFile::ReadString(). Otherwise, you can use STL, fopen()/gets(), CreateFile()/ReadFile(). Take your pick.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Reading all lines

Alex Cutovoi4-Oct-05 8:39

Alex Cutovoi

4-Oct-05 8:39

This is my code:

FILE *pFile;
MessageBox(0, thefile, "Erro", 0);
pFile = fopen(thefile, "r");
if(pFile != NULL)
{
while(!EOF)
{
fgets(linha, 100, pFile);
printf("%s", linha);
}
}
else
{
MessageBox(0,"File cound not be opened", "Error", 0);
}
fclose(pFile);

I think that my code is correct but the file doesn't open, what's wrong?

Re: Reading all lines

David Crow4-Oct-05 8:49

David Crow

4-Oct-05 8:49

Alex Cutovoi wrote:
pFile = fopen(thefile, "r");

If thefile does not specify an absolute path, fopen() will only work if the file is in the same folder as the program itself.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Reading all lines

Alex Cutovoi4-Oct-05 9:02

Alex Cutovoi

4-Oct-05 9:02

this is the part where I call my function

int main()
{
AbrirArquivo("c:\file.txt");
return 0;
}

the error persists, what's going on?

Re: Reading all lines

David Crow4-Oct-05 9:10

David Crow

4-Oct-05 9:10

You need to use two backslahes. As it stands, fopen() tried to open a file named c:ile.txt.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Reading all lines

Alex Cutovoi4-Oct-05 9:32

Alex Cutovoi

4-Oct-05 9:32

My new code is this:

#include <windows.h>
#include <stdio.h>
int iNotas[7];

void AbrirArquivo(const char* theFile)
{
FILE *pFile;
char linha[100];
pFile = fopen(theFile, "r");
if(pFile != NULL)
{
while(!feof(pFile))
{
fgets(linha, strlen(linha), pFile);
printf("%s", linha);
}
fclose(pFile);
}
else
{
MessageBox(0,"file not found", "Error", 0);
}

}

int main()
{
AbrirArquivo("c:\\file.txt");
return 0;
}

Thanks for help.
The problem remains there, #@$%%%@@#!

Re: Reading all lines

David Crow4-Oct-05 9:58

David Crow

4-Oct-05 9:58

Alex Cutovoi wrote:
fgets(linha, strlen(linha), pFile);

This should be:

fgets(linha, sizeof(linha), pFile);

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Client/server .... please HELP

Member 23297074-Oct-05 7:20

Member 2329707

4-Oct-05 7:20

Hi all

Article "A light-weighted client/server socket class in C++" explains how to make a client/server application, but i am a beginner and want to know if there are tutorials out there that are simple to use and that explains, step by step, how to create the server application and the client application.
The apps should use sockets and be as simple as possible (basically just be able to wait for a request (server) and then send an acknowledgement to the client (just a basic text message). it should really only illustrate the basic phases: 1) idle(server waiting for a connection), (2)connection establishment, (3)data transfer, (4)termination.

I know that you need the ip address as well as well as a port for communication - but that is basically all i know

if there is anyone who can help by writing a basic program (or tutorial), or even refering me to websites (one for beginners, as all the websites i find are a bit advanced and confusing for the novice C++ network programmer), I would most certainly appreciate it.

thank you.

Newbie problem

Anonymous4-Oct-05 6:18

Anonymous

4-Oct-05 6:18

I used to code more when i was in a programing class in college, recently i have started to try again. Problem is every time i write code i get the "Fatal Error C1010: unexpected end of file while looking for pre-compiled header directive" (I'm using visual studio.net) I know the code is supposed to work, i copy and pasted it off a website tutorial, and to even check I went to /another/ tutorial and tried their version, also same issue. Is something wrong with my library? What can i do to fix this?

-Thanks a lot
Brandon

Re: Newbie problem

Ravi Bhavnani4-Oct-05 6:28

Ravi Bhavnani

4-Oct-05 6:28

Add #include "stdafx.h" to the top of your .cpp file.

/ravi

My new year's resolution: 2048 x 1536
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ravib(at)ravib(dot)com

Dialog Controls

LCI4-Oct-05 4:58

LCI

4-Oct-05 4:58

I am interested in getting a static text control to change when a user of a particulat status logs into my app.
So currently say the text is "Hello Operator", i would like that to change if a Technician logs in to say "Hello Tech". Not sure which function in the static text control will do this for me.

Also, i would like to hide a check box control if a different type of user logs in. I am not sure which function accomplishes hiding the control dynamically.

Thanks,

Re: Dialog Controls

Maximilien4-Oct-05 5:21

Maximilien

4-Oct-05 5:21

LCI wrote:
Not sure which function in the static text control will do this for me.

CWnd::SetWindowText

LCI wrote:
Also, i would like to hide a check box control

CWnd::ShowWindow

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Dialog Controls

LCI4-Oct-05 5:33

LCI

4-Oct-05 5:33

I used the "ShowWindow(SW_HIDE)" but that did not work. Is there something that i am not doing?

Re: Dialog Controls

bugDanny4-Oct-05 5:41

bugDanny

4-Oct-05 5:41

I think you've got to create a member variable for that control, and then do something like m_var.ShowWindow(SW_HIDE). I haven't done that for a while, though, so I could be wrong.

Danny

The stupidity of others amazes me!

Re: Dialog Controls

Prakash Nadar4-Oct-05 5:47

Prakash Nadar

4-Oct-05 5:47

Maximilien wrote:
CWnd::SetWindowText

One answer for many Smile | :)

-prakash

Re: Dialog Controls

bugDanny4-Oct-05 5:24

bugDanny

4-Oct-05 5:24

Create a member variable for the static text control. There can be two kinds, either use CString, or CStatic. The function to change the CString variable is simple. For example, say your member variable is CString m_var.

Then,

m_var = "Hello Tech";
UpdateData(FALSE);

The UpdateData() function takes the new setting of m_var and makes it display on the dialog. If you used UpdateData(TRUE) it would take the text from the dialog and update the variable. (Note: UpdateData() updates all the variables on your dialog.)

For a CStatic variable, I think you use, SetWindowText(). So...

m_var.SetWindowText("Hello Tech");

Hope this helps!

Danny

The stupidity of others amazes me!

Re: Dialog Controls

LCI4-Oct-05 5:50

LCI

4-Oct-05 5:50

I am using a static and have pretty much what you suggested but the text does not change. The properties of the static control have text. Upon initializing the app, i check to see if the user type logged in is different from the text already there. If it is, i set the text like above. Is there a property that i have to chnage as well on this static control?

Re: Dialog Controls

bugDanny4-Oct-05 5:57

bugDanny

4-Oct-05 5:57

You created a member variable of type CStatic for the static text control? And when are you doing this initialization? I just ran a quick test myself, changing the text of a static text control with SetWindowText(). I placed it in OnInitDialog(). This worked fine for me.

Danny

The stupidity of others amazes me!

Re: Dialog Controls

Trollslayer4-Oct-05 6:42

Trollslayer

4-Oct-05 6:42

Change the ID of the control from IDC_STATIC to IDC_STATIC1 then you can create a member variable (e.g. m_st1) and carry out operations such as m_st1.SetWindowText("Hello Tech");.
IDC_STATIC is a special case and all the statics you place on a dialogue will use this so you cannot access the control via that ID.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Inserting text into text box

si_694-Oct-05 4:54

si_69

4-Oct-05 4:54

Hi
I wish for my user to be able to insert some text into a textbox, by the use of a button

for example, i have a text box, next to it is a button, saying "Insert Name", once
this button is clicked it will update a name into the text box, where the current
cursor position is

Anyone know the best place to start

cheers

si

Re: Inserting text into text box

Maximilien4-Oct-05 5:27

Maximilien

4-Oct-05 5:27

si_69 wrote:
I wish for my user to be able to insert some text into a textbox, by the use of a button

CWnd::SetWindowText ( I assume you know how to add a callback (ON_BTN_CLICKED handler ) for your button. )

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Inserting text into text box

si_694-Oct-05 5:38

si_69

4-Oct-05 5:38

thanks, but that just replaces the text what is already there

what i need is

if my textbox contianed the following

"hello this is a test message"

if the user clicked into the textbox, and the cursor was then placed before "test message"

then clicked insert name, the text should read

"hello this is a Fred bloggs test message";

Re: Inserting text into text box

bugDanny4-Oct-05 5:44

bugDanny

4-Oct-05 5:44

See my post from a little earlier. You need to use GetWindowText() to get the original text, put it in a CString, then use Insert() to insert the string you'd like. Then you use SetWindowText()

Danny

The stupidity of others amazes me!

Re: Inserting text into text box

bugDanny4-Oct-05 5:36

bugDanny

4-Oct-05 5:36

Is the text box an edit box? If so, you need to create a member variable for it. You have two choices, CString or CEdit. If it's a CString (e.g m_var) then,

CMyDialog::OnButton(){
UpdateData(TRUE);
int n = m_var.Insert(0, "Name to be inserted");
ASSERT(n == m_var.GetLength());
UpdateData(FALSE);
}

So that when the button is pressed, the program gets the current text in the edit box, you insert the substring at the index indicated by the first argument to Insert() (in this example 0). UpdateData(FALSE) updates the dialog with the new text.

If you use CEdit, you can do something like,

CString temp;
m_var.GetWindowText(temp);
temp.Insert(0, "Name to be inserted");
m_var.SetWindowText(temp);

And this should display the new text with the name inserted.

Danny

The stupidity of others amazes me!

Re: Inserting text into text box

si_694-Oct-05 5:42

si_69

4-Oct-05 5:42

thanks danny,

I am using CEdit btw,

that will insert the text ok,but the text is always placed at the start of the sting, what i need is to place that text
where the cursor is positioned

hope that make sense

si

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