C / C++ / MFC

5-Nov-07 22:44

On my MFC application I read file and do some process on it. Here is the code I used to open and read only.

<br />
CFile srf_ReadFile;<br />
char * srf_FilePath = "ReadFile_001.txt";<br />
if(srf_ReadFile.Open(srf_FilePath, CFile::modeRead))<br />
{<br />
// Do the required process here on ReadFile_001.txt<br />
}<br />

So, the file should be always in the same folder which the project/solution contain. If I want to read another file, say ReadFile_002.txt, have to do it manually, go to the code and gives the new file name.

char * srf_FilePath = "ReadFile_002.txt";

It is too boring. So I want to make it more reliable to use. I want to add a browse button(I think that is the correct word, which is used to find the file in Windows) and set it as the file which I want to read.

How can I do it. Can you guys explain.

I appreciate your help all the time...
Eranga Smile | :)

Cedric Moonen5-Nov-07 22:55

Cedric Moonen

5-Nov-07 22:55

Eranga Thennakoon wrote:
I want to add a browse button(I think that is the correct word, which is used to find the file in Windows) and set it as the file which I want to read.

GetOpenFileName[^] will help you.

Cédric Moonen
Software developer

Charting control [v1.2]

CodingLover5-Nov-07 23:05

5-Nov-07 23:05

Thanks, I read it and little bit confusing. Do you know any place I can see a small worked example.

I appreciate your help all the time...
Eranga Smile | :)

Cedric Moonen5-Nov-07 23:12

Cedric Moonen

5-Nov-07 23:12

Eranga Thennakoon wrote:
I read it

Mmmh, if you had scrolled down the page, there is a link to an exemple here[^].

Cédric Moonen
Software developer

Charting control [v1.2]

CodingLover5-Nov-07 23:16

5-Nov-07 23:16

Thanks pal, now I have two such examples. I'll be if I got any issue there.

Thanks again.

I appreciate your help all the time...
Eranga Smile | :)

Jhony george5-Nov-07 23:06

Jhony george

5-Nov-07 23:06

hai...
in codeproject site itself so many examples are there.....y cant u go and search...any how... refer this <pre<a href="http://www.codeproject.com/buttonctrl/CBrowseCtrl.asp">http://www.codeproject.com/buttonctrl/CBrowseCtrl.asp</a>[<a href="http://www.codeproject.com/buttonctrl/CBrowseCtrl.asp" target="_blank" title="New Window">^</a>]>

Born to win...!

Nelek5-Nov-07 23:26

5-Nov-07 23:26

What about calling CFileDialog ??? Would it help you?

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Help me to understand what I'm saying, and I'll explain it better to you

Wink | ;)

CodingLover5-Nov-07 23:34

5-Nov-07 23:34

Actually all the worked examples I've found are too complected for me. Is there any easy way. All of the program use a edit box and use it for browsing. I'm not clear what's happened there. Cry | :((

I appreciate your help all the time...
Eranga Smile | :)

Hamid_RT5-Nov-07 23:46

Hamid_RT

5-Nov-07 23:46

There are not difficult maybe you need to more work for learn them.

CodingLover6-Nov-07 0:13

6-Nov-07 0:13

Yes, it's true. Those things are really new for me. That's why I'm stuck on different steps.

I appreciate your help all the time...
Eranga Smile | :)

Hamid_RT6-Nov-07 1:40

Hamid_RT

6-Nov-07 1:40

I think if you buy a book about mfc is helpful for you.

chandu0046-Nov-07 1:50

chandu004

6-Nov-07 1:50

donot get confused.
do as nelek has suggested using a CFileDialog. i had been using it since years.
see the example here.

CFileDialog dlg(true,NULL,_T("*.*"),OFN_FILEMUSTEXIST|OFN_HIDEREADONLY,"textfiles(*.*)|*.*|*.*");<br />
dlg.m_ofn.lpstrTitle="select the required file";<br />
if(dlg.DoModal()!=IDCANCEL)<br />
{<br />
CString filename=dlg.GetPathName();<br />
}<br />
else<br />
return;

--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.

CodingLover6-Nov-07 18:34

6-Nov-07 18:34

Can you explain this little more.

I want to get the path through a control. I mean through a text box. How it happened here. Smile | :)

====================================

Cheers, I've done it pal. Bind your code with a button click event and the CString set in to a edit control. How nice. It works.

Cheers again

Laugh | :laugh:

I appreciate your help all the time...
Eranga Smile | :)

Nelek6-Nov-07 21:01

6-Nov-07 21:01

See http://msdn2.microsoft.com/en-us/library/dk77e5e7(vs.71).aspx[^]

CodingLover6-Nov-07 21:40

6-Nov-07 21:40

Thanks pal. I've read it well and do my work well. I have another question regarding MFC control editing. I'll start a new thread.

Thanks again.

I appreciate your help all the time...
Eranga Smile | :)

Nelek5-Nov-07 23:52

5-Nov-07 23:52

Look at your docu and read about CFileDialog

One example with my personal use in my project, it gives something like save as... asking to overwrite if the file already exists:

CFileDialog newFileDlg (TRUE, "*.ext", NULL, OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, "Searched File (*.ext) | *.ext|", NULL);

Then you can use functions like newDlg.GetFileName (), GetFilePath ()... and others, that will help you to create the archive with CFile or CArchive

CodingLover6-Nov-07 0:46

6-Nov-07 0:46

I found this and refer, but lots of coding going there. I'm really confusing. Someone can give a brief explanation how to refer it.

I appreciate your help all the time...
Eranga Smile | :)

Nelek6-Nov-07 1:52

Message Map Problem [modified]

6-Nov-07 1:52

Are you reading the answers we give you?

minihotto5-Nov-07 22:39

minihotto

5-Nov-07 22:39

Hello,
I create a "Windows Form Application" project that names p2pport, in Microsoft visual .NET 2005.
I want to use the Message Map. I see it on MSDN. MFC uses it.
So I include the #include <afxwin.h>, and use MFC in a shared DLL.
This is my code.

BEGIN_MESSAGE_MAP(p2pport::Dlg,public System::Windows::Forms::Form)
ON_MESSAGE(WM_UI1, p2pport::Dlg::OnUI1, WPARAM wParam, LPARAM lParam)
ON_MESSAGE(WM_UI2, p2pport::Dlg::OnUI2, WPARAM wParam, LPARAM lParam)
ON_MESSAGE(MM_MIXM_LINE_CHANGE,p2pport::Dlg::onMixerCallBack)
ON_MESSAGE(MM_MIXM_CONTROL_CHANGE,p2pport::Dlg::onMixerCallBack)
END_MESSAGE_MAP()

p2pport is my project name, and Dlg is the name of my form file.
But I get a lots of errors.

error C2039: 'GetMessageMap' : is not a member of 'p2pport::Dlg'
error C2039: 'GetThisMessageMap' : is not a member of 'p2pport::Dlg'
error C2039: 'GetThisMessageMap' : is not a member of 'System::Int32'
error C2270: 'GetMessageMap' : modifiers not allowed on nonmember functions
error C2365: 'GetThisMessageMap' : redefinition; previous definition was 'formerly unknown identifier'
error C2440: 'static_cast' : cannot convert from 'void (__clrcall p2pport::Dlg::* )(WPARAM,LPARAM)' to 'LRESULT (__thiscall CWnd::* )(WPARAM,LPARAM)'
error C2440: 'static_cast' : cannot convert from 'void (__clrcall p2pport::Dlg::* )(WPARAM,LPARAM)' to 'LRESULT (__thiscall CWnd::* )(WPARAM,LPARAM)'
error C2440: 'static_cast' : cannot convert from 'void (__clrcall p2pport::Dlg::* )(WPARAM,LPARAM)' to 'LRESULT (__thiscall CWnd::* )(WPARAM,LPARAM)'
error C2440: 'static_cast' : cannot convert from 'void (__clrcall p2pport::Dlg::* )(WPARAM,LPARAM)' to 'LRESULT (__thiscall CWnd::* )(WPARAM,LPARAM)'
error C3861: 'GetThisMessageMap': identifier not found
error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
I google it, but nothing finds.

Can anybody help me to solve it?
Appreciate for ur reply. Thx.

-- modified at 5:03 Tuesday 6th November, 2007

baerten5-Nov-07 23:35

baerten

5-Nov-07 23:35

Own created messages will be handled this way in >>MFC<<:

In header:
class MyView
{
...
LRESULT OnMyMessage(WPARAM w=0,LPARAM l=0);
...
};

in .cpp:
BEGIN_MESSAGEMAP(MyView,CFormView)
ON_MESSAGE(WM_MY_OWN_MESSAGE,OnMyMessage)
END_MESSAGE_MAP()

LRESULT MyView::OnMyMessage(WPARAM w,LPARAM l)
{
// Work
return TRUE;
}

I hope this helps you Smile | :)

minihotto6-Nov-07 1:24

minihotto

6-Nov-07 1:24

Thx for your reply.
It helps me a lot.
But I still get some errors.

I create a header file that named CMyView and the content is following.

#ifndef CMYVIEW_H<br />
#define CMYVIEW_H<br />
#include <afxwin.h><br />
#include <afxext.h><br />
	public class CMyView : public CFormView<br />
	{<br />
		LRESULT OnUI1(WPARAM wParam, LPARAM lParam);<br />
		LRESULT OnUI2(WPARAM wParam, LPARAM lParam);<br />
		LRESULT onMixerCallBack(WPARAM wParam, LPARAM lParam);<br />
<br />
	};<br />
#endif

And my code is modified as below.

BEGIN_MESSAGE_MAP(CMyView,CFormView)<br />
	ON_MESSAGE(WM_UI1, OnUI1)<br />
	ON_MESSAGE(WM_UI2, OnUI2)<br />
	ON_MESSAGE(MM_MIXM_LINE_CHANGE,onMixerCallBack)<br />
	ON_MESSAGE(MM_MIXM_CONTROL_CHANGE,onMixerCallBack)<br />
END_MESSAGE_MAP()

And there's the error.

error C2509: 'GetMessageMap' : member function not declared in 'CMyView'
error C2509: 'GetThisMessageMap' : member function not declared in 'CMyView'

How could I solve this problem?
Appreciate for ur reply.
Thx.

minihotto6-Nov-07 1:42

minihotto

6-Nov-07 1:42

I got it.
I lose DECLARE_MESSAGE_MAP()in the header file.

The correct code is as below.

#ifndef CMYVIEW_H<br />
#define CMYVIEW_H<br />
<br />
#include <afxwin.h><br />
#include <afxext.h><br />
<br />
	public class CMyView : public CFormView<br />
	{<br />
<br />
	public:<br />
		afx_msg LRESULT OnUI1(WPARAM wParam, LPARAM lParam);<br />
		LRESULT OnUI2(WPARAM wParam, LPARAM lParam);<br />
		LRESULT onMixerCallBack(WPARAM wParam, LPARAM lParam);<br />
	protected:<br />
		DECLARE_MESSAGE_MAP();<br />
<br />
	};<br />
<br />
#endif