C / C++ / MFC

Access violation reading location

2-Aug-05 6:44

nice stuff frm u and marc... thanx guys..
its done Smile | :)

regards,
Rookie

Re: CString!!!

Peter Weyzen2-Aug-05 10:33

Peter Weyzen

2-Aug-05 10:33

And don't forget:

<br />
CString strMsg = "value of x =";<br />
int num =5;<br />
<br />
// but then you need to add a formating parameter using '+'<br />
// Msg.Format(Msg,"%d", num); //i dont want like "value of x" here lke ("val of x"%d,num)<br />
strMsg.AppendFormat("%d", num);<br />

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.santacruznetworks.com">Santa Cruz Networks</A>

How to play a media file

Aqueel2-Aug-05 4:52

Aqueel

2-Aug-05 4:52

Hello
I have added windows media file in dialog based application as an activeX control. Now i want to play a file in it. Please tell me how can i do that?

Thanks

We Believe in Excellence

Bruce Pataki2-Aug-05 4:50

Bruce Pataki

2-Aug-05 4:50

I am creating an MFC application with activeX document server support. The application runs perfectly fine when i run as a standalone application. But when i run the application in Internet explorer,
it opens however opening a form from the top menubar, it gives an error "access violation reading
location" having error code 0xC0000005 (Running in standalone mode does not give this error).

I have used global pointers to the objects I need.
In application class, i have declared a object as

TestClass* tm; //tm is a global pointer to TestClass

In application class, InitInstance() function i initialize the pointer as

tm = new TestClass();

AND i call the following code on Menu click as

{
tm->doModal();
}

I get the access violation error when i call DoModal().
I have to use tm as a global pointer to TestClass since using
local pointer has not worked. If you have any workaround, please help.

Thanks.

Bruce

a standard call for get current directory?

IlanTal2-Aug-05 4:36

IlanTal

2-Aug-05 4:36

Is there a more standard way from within MFC to get the current working directory? What I’m using is _getcwd(buff, 50). It does the job, but I’m wondering if I should be using something else (which I can’t as now find)?

Thanks,
Ilan

Re: a standard call for get current directory?

Marc Soleda2-Aug-05 4:44

2-Aug-05 4:44

Platform SDK call:

TCHAR szDirectory[MAX_PATH] = "";

::GetCurrentDirectory(sizeof(szDirectory) - 1, szDirectory);

Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

CListCtrl

Halawlaws2-Aug-05 4:17

Halawlaws

2-Aug-05 4:17

I have a ClistCtrl with three columns how do i select wich colum i want to insert my string.
Each time i insert a String it is inserted in the same column (1):

int a;
a = m_F.m_SN.GetCount()-1;
while (a>0)
{
S = m_F.m_SN.GetAt(m_F.m_SN.FindIndex(a));
CLC.InsertItem(a,S.SNUPS,0);
CLC.InsertItem(a,S.SNRand,1);
CLC.InsertItem(a,S.SNDevice,2);
a--;
}

/\|-||\/|/\|)

Marc Soleda2-Aug-05 4:40

2-Aug-05 4:40

You have to fill the LVITEM structure:

<br />
LVITEM lvi;<br />
CString csText = "Hi !!";<br />
<br />
lvi.iItem = 0; //row<br />
lvi.iSubItem = 1; // column<br />
lvi.mask =  LVIF_TEXT; // for only text.<br />
lvi.pszText = csText.GetBuffer(0);<br />
CLC.InsertItem(&lvi);<br />

For a complete guide Using the List Control
[^]

I hope it helps,
Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

Halawlaws2-Aug-05 4:49

Halawlaws

2-Aug-05 4:49

thx man

/\|-||\/|/\|)

BadKarma2-Aug-05 4:41

BadKarma

2-Aug-05 4:41

Hi,

InsertItem, adds an item to the listcontrol, this is a full line in the list view and is in fact the text of the first column.
The text in the other columns (2 and further) is call subitems.

int nIndex = 1;

nIndex = c_listcontrol.InsertItem(nIndex, "placed in first column");

// use the new index because we dont know where the actual item is added in the listview,
// due to sorting and so.
// add to second column, 1: subindex is zero based
c_listcontrol.SetItemText(nIndex, 1, "placed in second column");
// add to third column, 2:
c_listcontrol.SetItemText(nIndex, 2, "placed in third column");

Regards
Kurt Pattyn

codito ergo sum

Please check this code...

Halawlaws2-Aug-05 4:49

Halawlaws

2-Aug-05 4:49

thx man

/\|-||\/|/\|)

Aqueel2-Aug-05 4:07

Aqueel

2-Aug-05 4:07

I have written the following piece of code into my project. But it is giving me assertion error. Can anyone tell me what is problem in it?

void CPungaDlg::OnBUTBrw()
{
CFileDialog find(true, NULL, NULL, OFN_EXPLORER, NULL, NULL);
find.DoModal();
CString filename = find.GetFolderPath();
m_name = filename; //prints address in edit box.
UpdateData(false);
}

We Believe in Excellence

Re: Please check this code...

C^hris L^osinger2-Aug-05 4:08

C^hris L^osinger

2-Aug-05 4:08

Aqueel wrote:
it is giving me assertion error

where? when? after you do what?

Cleek | Image Toolkits | Thumbnail maker

Re: Please check this code...

Marc Soleda2-Aug-05 4:24

Re: Please check this code...

2-Aug-05 4:24

Strange

cause even GetFolderPath is only valid for an Explorer-style window you have provided this style ... and it crashes Unsure | :~

Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

Jose Lamas Rios2-Aug-05 7:46

Jose Lamas Rios

2-Aug-05 7:46

The assertion is this, right?

CString CFileDialog::GetFolderPath() const
{
   ASSERT(::IsWindow(m_hWnd));
 
   [...]
 
}

It means that calling CFileDialog::GetFolderPath is only allowed while the file dialog is active, and not after DoModal has returned, as it is your case.

If you are only interested in the folder for the selected file, consider using SHBrowseForFolder instead of CFileDialog.

--
jlr
http://jlamas.blogspot.com/[^]

CList

Smith#2-Aug-05 3:08

2-Aug-05 3:08

how to clear items of CList ?

i miss m_Clist.Clear(); Frown | :(

regards,
Rookie

Marc Soleda2-Aug-05 3:16

2-Aug-05 3:16

From MSDN: CList::RemoveAll[^]

Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

Smith#2-Aug-05 3:32

2-Aug-05 3:32

it's for win CE it seems.. its not working..
n also why there's no method like m_clistbx.RemoveAll() available in the control variable m_clistbx??

regards,
Rookie

Marc Soleda2-Aug-05 3:38

2-Aug-05 3:38

Ups !!! I think you'll have to remove them one by one looping through the CList, using GetCount and IsEmpty and RemoveTail, RemoveHead or RemoveAt.

Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

Maximilien2-Aug-05 3:18

Maximilien

2-Aug-05 3:18

(edited ... I forgot how to read this morning ... ) Unsure | :~

Maximilien Lincourt
Your Head A Splode - Strong Bad

Smith#2-Aug-05 3:43

2-Aug-05 3:43

somebody help...
how to clear a list box? no straight method for it??

regards,
Rookie

David Crow2-Aug-05 3:51

David Crow

2-Aug-05 3:51

Rookieee wrote:
how to clear a list box?

How about CListBox::ResetContent(), or SendMessage(..., LB_RESETCONTENT, ...)?

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

BadKarma2-Aug-05 3:54

BadKarma

2-Aug-05 3:54

hi
To clear a listbox you must call the following function

...
c_listBox.ResetContent();
...

Regards,
Pattyn Kurt

codito ergo sum

Smith#2-Aug-05 5:36