C / C++ / MFC

Convert disk file(file stream) into memory stream.

8-Jun-08 20:33

MAPI Here[^] , Here too[^]

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

CodingLover8-Jun-08 20:00

CodingLover

8-Jun-08 20:00

Hi all,

I have written a xml file writer application and all data written into a disk file.

I refer the following example to do it.

http://msdn.microsoft.com/en-us/library/ms753144(VS.85).aspx[^]

Now I want to read that disk file in to memory. I mean to a buffer. Because I want to attach it with another data buffer.

How can I do this.

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

Convert disk file(file stream) into memory stream.

CodingLover8-Jun-08 19:58

CodingLover

8-Jun-08 19:58

Hi all,

I have written a xml file writer application and all data written into a disk file.

I refer the following example to do it.

Access control variables and methods of other classes in SDI Application

Maxim Zarus8-Jun-08 19:50

Maxim Zarus

8-Jun-08 19:50

Hi,
In a SDI Application, I have three Classes CMainFrame, CLeftView(Derived from CTreeView)
and CMyPrgView(Derived from CFormView).
Now I want to access all class member, function and control variables of each class from rest of classes.

Like when I click on tree items(LeftView), Controls placed on FormView should respond
or
clicking on menu(MainFrame) both TreeView items and Formview controls respond and vice versa.

Please tell me any standard way to access other class members and function in SDI Application.

Regards,
Maxim.

Re: Access control variables and methods of other classes in SDI Application

Paresh Chitte8-Jun-08 20:41

Paresh Chitte

8-Jun-08 20:41

Write your controling function in Application class (Derived from CWinApp).

class CYourApp : public CWinApp
{
public:
   void YourControlingFunction();
}

//Wherever required use like this,

CYourApp* pApp = (CYourApp*)AfxGetApp();
if(NULL != pApp)
{
   pApp->YourControlingFunction();
}

Hope this will serve your purpose.

Regards,
Paresh.

Re: Access control variables and methods of other classes in SDI Application

Maxim Zarus8-Jun-08 21:06

Maxim Zarus

8-Jun-08 21:06

Thanks for your reply. I tried following code in my CLeftView class on Tree item selection(OnTvnSelchanged).

CMyPrgView* pView= (CMyPrgView*)AfxGetApp();
if(NULL!=pView)
{
   pView->m_Edit1.SetWindowText(L"P");
}

But getting "Debug Assertion Failed" error on SetWindowText().

Re: Access control variables and methods of other classes in SDI Application

Akt_4_U8-Jun-08 22:09

Akt_4_U

8-Jun-08 22:09

The AfxGetApp() will return your application class poniter not view. Here you have casted the AppClass to ViewClass poniter. This is not possible.

akt

Re: Access control variables and methods of other classes in SDI Application

Maxim Zarus8-Jun-08 22:15

Maxim Zarus

8-Jun-08 22:15

I did it as suggested by "Paresh".
I have also tried CMyPrgView* pView = new CMyPrgView();
but still Assertion error comes.
What i do, please suggest me.

Re: Access control variables and methods of other classes in SDI Application

Paresh Chitte8-Jun-08 22:44

Paresh Chitte

8-Jun-08 22:44

Please read my post carefully. Take the help of AfxGetApp[^].

Regards,
Paresh.

Re: Access control variables and methods of other classes in SDI Application

SandipG 8-Jun-08 22:42

SandipG

8-Jun-08 22:42

You can have pointers to your view classes inside CMainFrame.
and then access through AfxGetMainWnd() which will giev you pointer to CMainFrame.
you have to typecast i.e. (CMainFrame*)AfxGetMainWnd().
I home it makes sense.

Regards,
Sandip.

file dialog

projectip8-Jun-08 19:35

8-Jun-08 19:35

I have a file dialog.i have filtered out the type of file i need.but how could i open the file in the application after selecting it?after clicking "open" in the dialog , i need to see the file.

Thanks

_AnsHUMAN_ 8-Jun-08 19:41

8-Jun-08 19:41

ShellExecute(/*parameters*/); will open the file in the application that it is related with. You will have the file path from the FileDialog

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

projectip8-Jun-08 19:58

8-Jun-08 19:58

I have to just display a jpeg file from the selected folder.No other operation has to be done.What should I do?

_AnsHUMAN_ 8-Jun-08 20:15

8-Jun-08 20:15

So, did you try opening the file using ShellExecute? Where do you want to display the jpeg file. look at the parameters of the ShellExecute function. You can pass the name of the application that you want the file to open in. Hope this helps.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

projectip8-Jun-08 20:28

8-Jun-08 20:28

Thank you Sir....
I was able to open the jpeg file now.Now I want to know what should I do to open an exe file?should i just specify the path of the exe file?

_AnsHUMAN_ 8-Jun-08 20:34

8-Jun-08 20:34

Yes. BTW you can take some time out and visit MSDN site for more help on ShellExecute and how to use it.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

projectip8-Jun-08 20:45

8-Jun-08 20:45

the jpeg files which i have specified to be opened is displayed in Windows picture and fax viewer.Anything that i have to do to just diaply the picture in vc++ runtime display.
here is the code i have written
ShellExecute(NULL,"open",f.GetFileName(),NULL,NULL,SW_SHOW);

_AnsHUMAN_ 8-Jun-08 21:17

8-Jun-08 21:17

That would be the default associated application in the registry settings [Don't recollect where exactly] for jpeg files.

projectip wrote:
do to just diaply the picture in vc++ runtime display.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

projectip8-Jun-08 21:48

8-Jun-08 21:48

Thank you so much for your help....

_AnsHUMAN_ 8-Jun-08 22:03