C / C++ / MFC

File I/O inside a text file

13-Aug-02 6:59

I don't clearly understand your idea. If you want to get a Window's text, just use GetWindowText

Hung Son
A Vietnamese student
i-g.hypermart.net
dlhson2001@yahoo.com

Anonymous13-Aug-02 6:33

Anonymous

13-Aug-02 6:33

Sorry for the newbie question, but lets say i have a text file, and in a certain location in the text file, there is a string of characters I would like to modify.. lets say its HIGHSPEED.. if I want to replace HIGHSPEED with DIALUP, without having excess whitespaces, how would I accomplish that? I want to remove the extra spaces that would be at the end if I were to seek the offset, and replace the word with my secondary word.

Thanks in advance.
btw. I can do this in MFC or C style. MFC prefered (bleh)

Tomasz Sowinski13-Aug-02 6:47

Tomasz Sowinski

13-Aug-02 6:47

Is the file very large? If not, you could load it into memory, perform string replace and write back.

Tomasz Sowinski -- http://www.shooltz.com

What is "scratch" and why can everything be made from it?

dlhson13-Aug-02 6:55

13-Aug-02 6:55

Even if it's so large, you can use String tech with FileMapping Roll eyes | :rolleyes:

Hung Son
A Vietnamese student
i-g.hypermart.net
dlhson2001@yahoo.com

Tomasz Sowinski13-Aug-02 6:58

Tomasz Sowinski

13-Aug-02 6:58

How do you grow or shrink memory mapped file?

Tomasz Sowinski -- http://www.shooltz.com

What is "scratch" and why can everything be made from it?

dlhson13-Aug-02 6:52

load one field of all the records of a table into a listbox

13-Aug-02 6:52

replace HIGHSPEED with DIALUP
You must handle that.

Hung Son
A Vietnamese student
i-g.hypermart.net
dlhson2001@yahoo.com

danag13-Aug-02 6:21

danag

13-Aug-02 6:21

I am trying to load a particular field of all records in a table into a listbox. when i run the exe, I am getting a messagebox with the error:
too few paramaters expected one.

what does this type of error mean??

Re: load one field of all the records of a table into a listbox

dazinith13-Aug-02 6:32

dazinith

13-Aug-02 6:32

it should be just:

m_MyListBox.AddString(myRecord.m_strField1);

you should post code if you want help with an error.. so we can see where the error is being caused.

-dz

Re: load one field of all the records of a table into a listbox

danag13-Aug-02 6:59

danag

13-Aug-02 6:59

When I run it, I get the messagebox error and when the dialog appears, I donot have the fileds loaded?
I have the code where I have tried to load the field..

void CMgen1View::OnInitialUpdate()
{
m_pSet = &GetDocument()->m_mgen1Set;
CRecordView::OnInitialUpdate();
LoadListbox(); //CALLING HERE
}

void CMgen1View::LoadListbox()
{

CMgen1Doc* pDoc = GetDocument();
CListBox* pLB = (CListBox*) GetDlgItem(IDC_LIST1);
CSectionSet sect(&pDoc->m_database);

sect.Open();

while(!sect.IsEOF()) {
pLB->AddString(sect.m_CourseID);
sect.MoveNext();
}
}

Re: load one field of all the records of a table into a listbox

Tomasz Sowinski13-Aug-02 6:50

Tomasz Sowinski

13-Aug-02 6:50

The database query you're executing has probably a misspelled column name. Check the SQL text.

Tomasz Sowinski -- http://www.shooltz.com

What is "scratch" and why can everything be made from it?

Re: load one field of all the records of a table into a listbox

dlhson13-Aug-02 6:57

how to setfocus "strongly"?

13-Aug-02 6:57

too few paramaters expected one.
I'm sure that your SQL command is incorrect;P

Hung Son
A Vietnamese student
i-g.hypermart.net
dlhson2001@yahoo.com

ns13-Aug-02 6:00

13-Aug-02 6:00

I want a user to definitely input a value into a certain editbox. If GetWindowText is "" I SetFocus back to it. But this doesnt prevent them from still ignoring it and pressing another button "Done" that proceeds with the rest of the code Needless to say the code crashes if you dont have an input in the editbox. Short of checking to see if the editbox is filled (and setting focus back to it if not)in the BN_CLICKED event of the "Done" button is there a way of forcing the user to make an entry in the editbox?

Thanks,
ns

C^hris L^osinger13-Aug-02 5:59

C^hris L^osinger

13-Aug-02 5:59

disable everything else until the edit control is filled ?

Conservative:
One who admires radicals centuries after they're dead.
-- Leo C. Rosten

image effects!

ns13-Aug-02 6:05

13-Aug-02 6:05

Thats a great solution! Thnaks,
ns

Ravi Bhavnani13-Aug-02 6:22

Ravi Bhavnani

13-Aug-02 6:22

I really should post my GUI helper class that makes it trivial to do this. Meanwhile, if you want to be really cool Cool | :cool:

do the following:

In the resource editor, set the OK button's "disabled" property.
Write a handler for the edit control's EN_CHANGE notification.
In the handler, get the edit control's text and enable the OK button only when the text is non-empty. Be sure to TrimRight() and TrimLeft() the text after you get it.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

ns13-Aug-02 7:54

13-Aug-02 7:54

Okay. I'l give that a shot as well. I did a less sophisticated version without the EN_CHANGE, but thats a cool idea like you said.

Re: m_Dismiss.Enable(FALSE);

Ravi Bhavnani13-Aug-02 8:09

Ravi Bhavnani

13-Aug-02 8:09

I'm emailing you a "preview" version of the GUI helper stuff I as talking about. Stay tuned... Smile | :)

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

m_Dismiss.Enable(FALSE);

ns13-Aug-02 6:19

13-Aug-02 6:19

The compiler doesnt like for a CButton m_Dismiss:

m_Dismiss.Enable(FALSE);

I cant find anything resembling this. I want to prevent them from clicking on the button, and I guess you cant disable a button. So I'm going to have to pop up a messagebox if they press the button and the editbox is empty, and set focus back to it. Am I being klugey here? Can you disable a button?

Thanks,
ns

Bijesh13-Aug-02 6:19

Bijesh

13-Aug-02 6:19

ns wrote:
going to have to pop up a messagebox if they press the button and the editbox is empty, and set focus back to it. Am I being klugey here? Can you disable a button?

Sure.. Use m_Dismiss.EnableWindow(FALSE);

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Visual c++ - Access mdb modification question

Ranjan Banerji13-Aug-02 6:57

Ranjan Banerji

13-Aug-02 6:57

Check on Button Click and then prompt the user with an irritating Message asking that the data be entered. After the message box ok button is clicked, set focus to the control. If you us the disable button approach you are not informing the user that the one edit control must be populated. You will be amazed at the number of users who will just sit and stare at the screen wondering what to do if the button is disabled. Smile | :)

gaudery13-Aug-02 5:42

gaudery

13-Aug-02 5:42

Hi I wrote(/writing) an app for my old highschool and need to know how to update the changes made in the database.
Let me explain, say I added some tables/relations to mydatabase.mbd, how do I let Visual C++ know?

Re: Visual c++ - Access mdb modification question

dlhson13-Aug-02 7:09