C / C++ / MFC

CFileDialog assertion error

28-May-02 4:10

I guess those devices have drivers. Maybe you can use them directly to communicate with the devices.

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Re: USB Communication?

Gordon Brandly28-May-02 8:16

Gordon Brandly

28-May-02 8:16

That entirely depends on the USB peripheral you're trying to communicate with. For instance, if it's a memory stick or a camera you would use various standard Win32 API calls.

I've just finished designing a custom USB peripheral that uses an off-the-shelf USB interface chip. In this case, the chip's manufacturer (FTDI) provides a DLL and import library with various functions one can call. Almost too easy! Cool | :cool:

Zizilamoroso28-May-02 3:41

28-May-02 3:41

I'm always having this error.
{ ASSERT(::IsWindow(m_hWnd)); return (int)::SendMessage(m_hWnd, LB_ADDSTRING, 0, (LPARAM)lpszItem); }

CInfoDlg is derived from CDialog and is a resource
m_cList is a CListCtrl

CInfoDlg dlg;

for(int nIndex=0;nIndex<nMax;nIndex++)
	dlg.m_cList.AddString(lpszNames[nIndex]);  // THIS LINE CAUSES THE 
ERROR

dlg.DoModal();

I'm overlooking something, but what?

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Zizilamoroso28-May-02 3:49

28-May-02 3:49

Sorry, but something's going wrong here Smile | :)

nIndex is a loop from 0 to nMax containing 1 functioncall
dlg.m_cList.AddString(lpszNames[nIndex]);

It's the functioncall that causes the error

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Nish Nishant28-May-02 3:52

28-May-02 3:52

frisco wrote:
It's the functioncall that causes the error

Yes! Read my reply to your first post!

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Zizilamoroso28-May-02 4:01

28-May-02 4:01

That last post was ment as a correction on the first post. something went wrong with the formatting: lots of characters are lost...

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Nish Nishant28-May-02 3:51

28-May-02 3:51

frisco wrote:
I'm overlooking something, but what?

Your dialog is not created yet! The C++ object is created, but the actual window it wraps is not up! That's why you get the assert. Use DoModal() and then put your list populating code in the OnInitDialog() handler

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Zizilamoroso28-May-02 3:55

28-May-02 3:55

Sorry, but I'm still in the "java" kind of programming Wink | ;-)

So, the instantiation is only made when the dialog is show on screen, and not when we call the constructor (like in java)? Am I having this wright?

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Nish Nishant28-May-02 4:37

EnumObjects returns error in recursive function

28-May-02 4:37

frisco wrote:
So, the instantiation is only made when the dialog is show on screen, and not when we call the constructor (like in java)? Am I having this wright?

The object [Here a CDialog derived class] is instantiated alright. But the underlying window is not yet created. MFC classes are really thin wrappers over the API. Till Create or DoModal is called, you should not try making any window manipulating function calls! Or any calls that access child controls in the window.

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

redeemer28-May-02 3:28

redeemer

28-May-02 3:28

I have a function that takes the pidl of a folder and loops through all the files in the folder and if there is a folder i the folder it calls itself, else it adds the file to a listview control. This works ok the first time the function is run, but when i calls itself, the pBrowse->EnumObjects doesen't return NOERROR it returns -2147023673, can anyone help me? the pidl i pass in the function is a pidl gotten from the SHBrowseForFolder function, here is the function:

(ignore the text after the pre tag, something went wrong when i modfied the post.

void AddFilesFromFolder(ITEMIDLIST *pIdl)
{
	if (pIdl)
	{
		IShellFolder *pBrowse = NULL;
		LPENUMIDLIST pFolder = NULL;
		LPMALLOC pMalloc = NULL;
		ITEMIDLIST *pNewId = NULL;
		STRRET strDispName;
		LVITEM lvItem;
		RECT rMain;
		RECT rAdd;
		char szCurrentFile[MAX_PATH+1+5];
		char szFolderPath[MAX_PATH+1];
		DWORD pActual = 0;
		DWORD dwAttrib;
		IShellFolder *CurrentFolder;
		HRESULT err;

		err = SHGetDesktopFolder (&CurrentFolder);

		if (err == NOERROR)
		{
			SHGetMalloc(&pMalloc);
			CurrentFolder->BindToObject(pIdl, NULL, IID_IShellFolder, (LPVOID*)&pBrowse);
			pBrowse->GetDisplayNameOf(pIdl, SHGDN_INFOLDER, &strDispName);
			err = pBrowse->EnumObjects(NULL, SHCONTF_FOLDERS | SHCONTF_NONFOLDERS | SHCONTF_INCLUDEHIDDEN, &pFolder);
			if (err == NOERROR)
			{
				SHGetPathFromIDList(pIdl, szFolderPath);
				lvItem.mask = LVIF_IMAGE | LVIF_TEXT;

				while (pFolder->Next(1, &pNewId, &pActual) != S_FALSE)
				{
					dwAttrib = SFGAO_FOLDER;
					pBrowse->GetAttributesOf(1, (LPCITEMIDLIST*)&pNewId, &dwAttrib);
						
					if (!(dwAttrib & SFGAO_FOLDER))
					{
						pBrowse->GetDisplayNameOf(pNewId, SHGDN_INFOLDER, &strDispName);
						PathCombine(gszPath, szFolderPath, strDispName.cStr);

						GetID3();
						FillInfo();
						ListAddItem();
					}

					if (dwAttrib & SFGAO_FOLDER)
					{
						pBrowse->GetDisplayNameOf(pNewId, SHGDN_INFOLDER, &strDispName);
						AddFilesFromFolder(pNewId);
					}
				}

				pMalloc->Free(pNewId);
				pMalloc->Release();
				EndDialog(hDialog, true);
				gbFileOpen = true;
				pFolder->Release();
			}

			CurrentFolder->Release();
		}
	}
}

etDisplayNameOf(pNewId, SHGDN_INFOLDER, &strDispName);
AddFilesFromFolder(pNewId);
}
}

pMalloc->Free(pNewId);
pMalloc->Release();
EndDialog(hDialog, true);
gbFileOpen = true;
pFolder->Release();
}

CurrentFolder->Release();
}
}
}

Re: Ignore this post something's wrong with it, i'll make another.

Nish Nishant28-May-02 3:48

Re: Ignore this post something's wrong with it, i'll make another.

28-May-02 3:48

redeemer wrote:
Ignore this post something's wrong with it, i'll make another.

LOL

Okay! HTML does weird things I guess Smile | :)

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Zizilamoroso28-May-02 3:52

Re: Ignore this post something's wrong with it, i'll make another.

28-May-02 3:52

Yep, something's going wrong here Wink | ;-)

same for two messages above this: CFileDialog assertion error

[VISUAL STUDIO 6.0] [MFC] [WIN98/2]

Bluute tette! Dead | X|

Alexandru Savescu28-May-02 4:18

Alexandru Savescu

28-May-02 4:18

You can also modify or delete a post if you are not satisfied with it.

Best regards,
Alexandru Savescu

sorry for my interrupt!

tiaozi28-May-02 3:23

tiaozi

28-May-02 3:23

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please introduce me some.... thank you.

rrrado28-May-02 3:38

rrrado

28-May-02 3:38

You can find hundreds of free web services, did you look at google.com directory ? Wink | ;)

Nish Nishant28-May-02 3:45

28-May-02 3:45

tiaozi wrote:
need a free web space (3-10MB)

Try Yahoo-Geocities

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Jason Gerard28-May-02 13:08

Jason Gerard

28-May-02 13:08

www.brinkster.com

Jason Gerard