Re: COM/DCOM is now what? - C / C++ / MFC Discussion Boards

Rolando Cruz19-Jun-07 3:51

19-Jun-07 3:51

Make sure you are calling the AfxInitRichEdit2() function at the begining of the application and not within OnInitDialog();

Also, did you declare m_RichEditCtrl as a CRichEditCtrl?

I tested this using VS 2005 version 8.0.50727.762 (SP.050727-7600) and your code was copied and pasted into the OnInitDialog without changes. All I then did was declare m_RichEditCtrl as a CRichEditCtrl.

Other than this I do not know what else to tell you. Hope this helps.

Rolando

File reading problem

Y_Kaushik19-Jun-07 3:05

Y_Kaushik

19-Jun-07 3:05

Hello Guru

I am making an application for reading .txt file from Hard Hisk and
copy this file to folder and save it name in database.

In this program i can read data from hard drive and copy the file to
folder Confused | :confused:

and also save its name in database.

Whenever i create a file in folder .(Its create successfully but
when try to reading contant of old file and writing new one an
assertion occor.

my code for that function is below.

CString str;
int ids;
CFileDialog Obj(TRUE);
if(Obj.DoModal() ==IDC_BUTTON3)
{
m_Upload = Obj.GetFileName();
}
str.Empty();
str = Obj.GetPathName();
SetDlgItemText(IDC_EDIT1,str);
///////////////////////////////////////////////////////////////////
/* reading file data from disk */
/////////////////////////////////////////////////////////////////
CString strLine = "";
CString buffer = "";
CStdioFile fileObj,filewrite;
CString fname;

fileObj.Open(str, CFile::modeRead | CFile::shareDenyWrite);

fname = fileObj.GetFileName();
// MessageBox(fname);

while(fileObj.ReadString(strLine))
{
fileObj.ReadString(strLine);
// fileObj.WriteString(fname);
buffer += strLine + "\r\n";
}
fileObj.Close();
// MessageBox(buffer);
SetDlgItemText(IDC_EDIT3,buffer);

fileObj.Open("c:\\UserFolder\\" + fname + ".txt",CFile::modeCreate,NULL);

Its run up to here successfully.

Its create a blank file in folder .

Now i am writing above code like this ( simple reading data from old file and writing it to new one an assertion occor . The code is below.

CString str;
int ids;
CFileDialog Obj(TRUE);
if(Obj.DoModal() ==IDC_BUTTON3)
{
m_Upload = Obj.GetFileName();
}
str.Empty();
str = Obj.GetPathName();
SetDlgItemText(IDC_EDIT1,str);
///////////////////////////////////////////////////////////////////
/* reading file data from disk */
/////////////////////////////////////////////////////////////////
CString strLine = "";
CString buffer = "";
CStdioFile fileObj,filewrite;
CString fname;

fileObj.Open(str, CFile::modeRead | CFile::shareDenyWrite);

fname = fileObj.GetFileName();
// MessageBox(fname);

while(fileObj.ReadString(strLine))
{
fileObj.ReadString(strLine);
// fileObj.WriteString(fname);
buffer += strLine + "\r\n";
}
fileObj.Close();
// MessageBox(buffer);
SetDlgItemText(IDC_EDIT3,buffer);

/*//////////////////////Copying file to another folder//////////////////////////*/
str.Empty();
fileObj.Open(str,CFile::modeRead);

while(filewrite.ReadString(strLine))
{

filewrite.WriteString(fname);
buffer += strLine + "\r\n";
}

fileObj.Open("c:\\UserFolder\\" + fname + ".txt",CFile::modeCreate,NULL);

How can i write content of old one to new one.

Any one Please told me .

Regard's
Kaushik

Re: File reading problem

Rolando Cruz19-Jun-07 3:38

Rolando Cruz

19-Jun-07 3:38

Hi,

Rather than reading the contents of the txt file to a buffer and then create and write it to the new file why not just do both at the same time?

<br />
CStdioFile fSrc, fDest;<br />
<br />
// Open Source and Create Destination files<br />
...<br />
<br />
while (fSrc.ReadString(strLine))<br />
{<br />
fDest.WriteString(strLine);<br />
}<br />
<br />
fSrc.Close();<br />
fDest.Close();<br />

Also, in your code you are missing the first line of the text file.

while(fileObj.ReadString(strLine)) <-- moves file pointer to next line<br />
{<br />
   fileObj.ReadString(strLine); <-- reads next line. 1st line is gone!!<br />
   ...<br />
}

Finally, unless you are making changes or scrapping the text file for any data why not use the ::CopyFile function?

Hope this helps!

Rolando

Re: File reading problem

Iain Clarke, Warrior Programmer19-Jun-07 4:08

Iain Clarke, Warrior Programmer

19-Jun-07 4:08

I would agree strongly with using CopyFile unless there is some compelling reason not to. NTFS files can include information on file streams that you wouldn't see by simply opening, reading and writing. While this would be rare, it can happen.

Also, you would be setting permissions on the new file to those of the user running your program. This *may* be what you want, but not necessarily.

I'm sure there are other reasons I can't think of right now.

Iain.

COM/DCOM is now what?

Rolando Cruz19-Jun-07 2:11

Rolando Cruz

19-Jun-07 2:11

Hello to all,

About 8 years ago I developed an client/server application for a client of mine using DCOM. I have not touched the subject since then. :->

I now have the need to revisit this technology but with all of the changes in software development I do not know what is being used now. Unsure | :~

Is DCOM still alive and kicking? Do I look at Web Services? Confused | :confused:

Thanks for your help in this matter.

Rolando

Re: COM/DCOM is now what?

bob1697219-Jun-07 4:34

bob16972

19-Jun-07 4:34

COM,DCOM,COM+, then came .NET

I used DCOM a few times but I regret it since it's so darn slow. I found the books on DCOM and COM+ are better used as references for COM techniques than for the technologies they represent directly.

Rolando E. Cruz-Marshall wrote:
Is DCOM still alive and kicking? Do I look at Web Services?

I could be way off, but from what I've seen DCOM was never really alive and kicking, IMHO.

Re: COM/DCOM is now what?

Rolando Cruz19-Jun-07 5:08

Rolando Cruz

19-Jun-07 5:08

In your opinion, is there an equivalent to DCOM in .Net? Is it Web Services?

It's been so long since I've worked with this I'm not sure which direction to go...

Rolando

Re: COM/DCOM is now what?

James R. Twine19-Jun-07 4:51

James R. Twine

19-Jun-07 4:51

   IIUC, .NET uses COM behind the scenes, for some things... Note sure if specifically DCOM, but anything is possible.

   If specifically asking about remote object access, then yes, SOAP and web services are likely the way to go.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Re: COM/DCOM is now what?

Rolando Cruz19-Jun-07 5:14

Rolando Cruz

19-Jun-07 5:14

I'm adding more information to this thread as to what I want to accomplish.

I need to develop an application which will be monitoring phone lines (Call Center). I want the client application to be notified when a specific line receives a phone call. I think this approach will be more efficient than querying the database every 30 seconds (or so) to see if a new call came through. Simple as that.

Now, does this mean the Web Service does all of this work (line monitoring) or do I also have to create a separate Web Service (DCOM) and end up witha three tiered application? Unsure | :~

(Line monitoring App / Web Service / Client App).

Thanks all for your suggestions. Big Grin | :-D

Rolando

Re: COM/DCOM is now what?

Matthew Faithfull19-Jun-07 7:51

Matthew Faithfull

19-Jun-07 7:51

Just a suggestion but for the Line monitoring I'd write a Windows Service and I'd have it talk to the client application using Sockets. Web technologies are not the best for Push applications where communications are initiated from the server end.
Also that way your client can be remote from the server. A two tier no Web no COM approach if you like.
If you do want a web front end then I'd go three tier with the web server hooking into a non visible version of the client app and for that I probably would use DCOM, or Connection Points or even a named pipe if the Presentation and Middleware layers could be combined. Depends if you'll need a Web Farm Big Grin | :-D

Nothing is exactly what it seems but everything with seems can be unpicked.

Re: COM/DCOM is now what?

Rolando Cruz19-Jun-07 7:56

Rolando Cruz

19-Jun-07 7:56

Excelent suggestion! Big Grin | :-D

I believe this would be the better way to go. I did not think about the Sockets. Cool.

Thanks for your help.

Rolando

Unable to launch dialog box

Wamuti19-Jun-07 2:09

Wamuti

19-Jun-07 2:09

I'm trying to make a dialog box appear from a file menu after clicking it with popup "Dialog" but i am getting the following error:

menu.obj : error LNK2001: unresolved external symbol "protected: virtual struct AFX_MSGMAP const * __thiscall CGuessDialog::GetMessageMap(void)const " (?GetMessageMap@CGuessDialog@@MBEPBUAFX_MSGMAP@@XZ)
Debug/menu.exe : fatal error LNK1120: 1 unresolved externals

I have been unable to debug but the problem comes in when i use the following code in my .cpp

afx_msg void CMenusWin::OnBringDialog() //Function associated
//with message identifier for launching the dialog box
{
CGuessDialog dlg; //creating an instance of CGuessDialog to
//execute constructor on being clicked
dlg.DoModal();

}

I have a class CGuessDialog in a header file and have already made the resources manually.(i am not using the wizard)

Below is my message map:

//DECLARE_MESSAGE_MAP() has been done on the CMenusWin.
BEGIN_MESSAGE_MAP(CMenusWin,CFrameWnd)//CMenusWin contains the main window

ON_COMMAND(IDM_DIALOGLAUNCHER,OnBringDialog)//OnBringDialog declared
//in CMenusWin

END_MESSAGE_MAP()

Please help. I'm sunk!!
Thanks

TreeS

Re: Unable to launch dialog box

Roger Stoltz19-Jun-07 2:40

Roger Stoltz

19-Jun-07 2:40

Wamuti wrote:
menu.obj : error LNK2001: unresolved external symbol "protected: virtual struct AFX_MSGMAP const * __thiscall CGuessDialog::GetMessageMap(void)const " (?GetMessageMap@CGuessDialog@@MBEPBUAFX_MSGMAP@@XZ)
Debug/menu.exe : fatal error LNK1120: 1 unresolved externals

You're probably missing a DECLARE_MESSAGE_MAP() in your CGuessDialog declaration.

Wamuti wrote:
I have a class CGuessDialog in a header file and have already made the resources manually.(i am not using the wizard)

Well, create a dummy dialog with the wizard; compare the declarations and you should detect what's missing.

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

Re: Unable to launch dialog box

Wamuti19-Jun-07 3:09

Wamuti

19-Jun-07 3:09

Ha! Thanks Smile | :)

.
I got that bug as i was rechecking my CGuessDialog. Actually i had two DECLARE_MESSAGE_MAPS In the header file D'Oh! | :doh:

!

Eureka Big Grin | :-D

! It has worked!!!
Thanks so so much

TreeS

Re: Unable to launch dialog box

Wamuti19-Jun-07 3:17

Wamuti

19-Jun-07 3:17

Ha! Thanks;).

I have gotten that bug.As i was going through the header file, i found I had made two DECLARE_MESSAGE_MAP(), one in CMenusWin class and the other in CGuessDialog class D'Oh! | :doh:

It now works! Thanks so so much.

TreeS

How to: Structure initialization

Programm3r19-Jun-07 0:01

Programm3r

19-Jun-07 0:01

Hi all,

I would like to know whether it is possible to construct a structure so that one of it's variables can be initialized with out the other being effected ?? i.e

struct foo
{
   char a[128];
   char b[128];
}FOODOO[100] = {"to A","to A again"}; // a must have both values

Thanks in advance
Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

Re: How to: Structure initialization

Rage19-Jun-07 0:27

Rage

19-Jun-07 0:27

If such a thing should work, then it would be :

= {{"to A",},{"to A again",},{...}};

But I hope for C++'s sake that this is not possible Smile | :)

I think you will have to go through an init function. BTW, this smells like a bad design ...

Re: How to: Structure initialization

Programm3r19-Jun-07 0:47

Programm3r

19-Jun-07 0:47

Thanks ... makes sense Smile | :)

Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

Difference between DLL & Process ???

amitmistry_petlad 18-Jun-07 23:45

amitmistry_petlad

18-Jun-07 23:45

Hi All!
What is the difference between DLL and process???

amit

"Success lies not in the result , But in the efforts !!!!!"
Amit Mistry - petlad -Gujarat-India

Re: Difference between DLL & Process ???

Programm3r19-Jun-07 0:05

Programm3r

19-Jun-07 0:05

Hi,

DLL
====
1.DLL is inprocess
2.In one windows Application, if any problem in DLL, just that specific form or part only will not work.but if any problem in Exe, entire application will not work.

EXE
====
1.Executable file
2.exe is outprocess

An EXE can run independently, whereas DLL will run within an EXE. DLL is an in-process file and EXE is an out-process file

for detail information plz look the below link

http://dotnetspider.com/qa/Question34260.aspx
http://dotnetspider.com/qa/Question36124.aspx
http://dotnetspider.com/qa/Question17736.aspx
http://dotnetspider.com/qa/Question12712.aspx

Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
My Blog: ^_^

Re: Difference between DLL & Process ???

karle19-Jun-07 0:08

karle

19-Jun-07 0:08

A dll is a dynamic library, a collection of functions and methods.
This library kann be linked to an executable (.exe).

Windows creates a process for each executable which is started.
A process just exists in memory of your OS.
A process has an Name and an ID (see task manager).
A process executes code which ca reside in a dll.

Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo18-Jun-07 23:32

Chen-XuNuo

18-Jun-07 23:32

I want to show bitmaps in icon form as previewings,just like the example thumbnail in cp,but I found that the item is just a section of the bitmap.

1.I import a bitmap to resource,modify its ID to IDB_BITMAP1.
2.I accociate a listctrl to m_listctrl.
3.I create: CImageList m_imagelist.
4.The last I do this in OnInitDialog():
//Load a bitmap
CBitmap bitmap;
bitmap.LoadBitmap(IDB_BITMAP1);

m_imagelist->Create(200,200,ILC_COLOR24,1,4);
m_imagelist->Add(&bitmap,RGB(255,0,0));
m_listctrl.SetImageList(m_imagelist,LVSIL_NORMAL);

m_listctrl.InsertItem(0,"1",0);

The result is the item in listctrl is just section of the bitmap,why?
Thanks~

Re: Why can't it show a whole bitmap in listctrl in icon form

Rage18-Jun-07 23:42

Rage

18-Jun-07 23:42

Chen-XuNuo wrote:
just section of the bitmap

You can choose between 16*16 or 32*32 icons for a listctrl, I think. I suppose you r bitmap is shrinked to 32*32. (not sure, however).

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

Re: Why can't it show a whole bitmap in listctrl in icon form

Chen-XuNuo18-Jun-07 23:49

Chen-XuNuo

18-Jun-07 23:49

What do you mean~?And how can I do?

Besides,if I change the m_imagelist.Create to
m_imagelist.Create(300,300,...),it shows a bigger section of the bitmap~

Re: Why can't it show a whole bitmap in listctrl in icon form

Rage19-Jun-07 0:22

Rage

19-Jun-07 0:22

What is your bitmap size, then ? And how much is displayed ?

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

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