C / C++ / MFC Discussion Boards

Re: Load Bitmap from file to doc

Amin.Abdi25-Aug-09 21:43

Amin.Abdi

25-Aug-09 21:43

sry forget it the code is in C..View and pdc defined there.
program is SDI

Re: Load Bitmap from file to doc

CPallini25-Aug-09 21:33

CPallini

25-Aug-09 21:33

Amin.Abdi wrote:
pDC->BitBlt(1280, -1765, 390, -230, pDC, // pDC : a CDC pointer to document (SDI Program)
0, 0, SRCCOPY);

What is the purpose of bit-blitting from pDC to pDC itself?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Load Bitmap from file to doc

Amin.Abdi25-Aug-09 21:49

Amin.Abdi

25-Aug-09 21:49

dcMem.SelectObject(&Bitmap);
	pDC->BitBlt(1280, nYposChange-1765, 390,  -230, &dcMem, 0, 0, SRCCOPY);

fixed but still nothing Frown | :(

Re: Load Bitmap from file to doc

CPallini25-Aug-09 21:55

CPallini

25-Aug-09 21:55

What's the purtpose of a negative height?
Smile | :)

Re: Load Bitmap from file to doc [modified]

Amin.Abdi25-Aug-09 22:10

Amin.Abdi

25-Aug-09 22:10

because of MapMode

modified on Wednesday, August 26, 2009 4:45 AM

Re: Load Bitmap from file to doc

CPallini25-Aug-09 22:57

CPallini

25-Aug-09 22:57

And why do you need the following statements?

Amin.Abdi wrote:
BYTE* pBitmapData = new BYTE[ BitmapImageSize ];
ZeroMemory( pBitmapData, BitmapImageSize );

Bitmap.SetBitmapBits(BitmapImageSize, pBitmapData);

Bitmap.SetBitmapBits( BitmapImageSize, pBitmapData );

The last line is because you don't trust MFC? Roll eyes | :rolleyes:

Re: Load Bitmap from file to doc

Amin.Abdi26-Aug-09 0:12

Amin.Abdi

26-Aug-09 0:12

I change my codes :
remove that statement and add these:

CClientDC dcMem;
dcMem.SelectObject(&Bitmap);
pDC->BitBlt(1280, nYposChange-1995, 390, 230, &dcMem, 0, 0, SRCCOPY);

but it show a print screen of window and print nothing. WHY and how can i fix it?

Re: Load Bitmap from file to doc

CPallini26-Aug-09 2:08

CPallini

26-Aug-09 2:08

You should put your drawing code inside the CView::OnDraw method.
Smile | :)

Re: Load Bitmap from file to doc

Amin.Abdi26-Aug-09 2:21

Amin.Abdi

26-Aug-09 2:21

i put it on a function and call the function in C..View::OnDraw.

Re: Load Bitmap from file to doc

CPallini26-Aug-09 2:38

CPallini

26-Aug-09 2:38

I would do this test:

CDC memDC;
memDC.CreateCompatibleDC(pDC);
dcMem.SelectObject(&Bitmap);
pDC->BitBlt(0, 0, 390, 230, &dcMem, 0, 0, SRCCOPY);

Re: Load Bitmap from file to doc

Amin.Abdi26-Aug-09 2:48

Amin.Abdi

26-Aug-09 2:48

THANX

Re: Load Bitmap from file to doc

CPallini26-Aug-09 2:55

CPallini

26-Aug-09 2:55

You are welcome.
As about negative height, when you should make something work, I suggest the 'stay simple' principle: start trying with 'fail-proof' parameters and then, when it works a bit, began to change..
Smile | :)

Date and Time

john563225-Aug-09 20:00

john5632

25-Aug-09 20:00

Hi,

I have today date, how can I get the date of 15,30,45 days back?

My code is to get today date and time:

CTime newtime=CTime::GetCurrentTime();
	struct tm temp;
	newtime.GetLocalTm(&temp);

WCHAR szStr[20];
	wsprintfW(szStr,_wasctime(&temp));
	AfxMessageBox(szStr);

Re: Date and Time

Rajesh R Subramanian25-Aug-09 20:16

Rajesh R Subramanian

25-Aug-09 20:16

MPTP wrote:
I have today date, how can I get the date of 15,30,45 days back?

You could use the COleDateTime[^] class. Just take a look at the member functions the class has to offer. Given a date, the class offers ways to find the day of the year, from which you'd have to subtract 15, 30 or whatever. Try it and if you didn't succeed, post whatever you tried (the code).

It is a crappy thing, but it's life -^ Carlo Pallini

Re: Date and Time

Cedric Moonen25-Aug-09 20:20

Cedric Moonen

25-Aug-09 20:20

Create a CTimeSpan[^] object with the correct number of days and substract it from your CTime object.

BTW, you don't need to make such a complex conversion to print the time in a string. Do yo know that CTime has a Format[^] function which is probably far easier to use than to convert to a tm structure first ?

Another point: is there a particular reason why you are using wide-char strings instead of unicode independant strings (TCHAR) ? You might want to read this article[^].

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

dwDesiredAccess in CreateFile API

Varghese Paul M25-Aug-09 18:47

Varghese Paul M

25-Aug-09 18:47

Hi everybody,
I don't know is this the right forum to ask this question. Guide me if I am wrong.

Right now I am working on some network related file systems.
My difficulty is to determine the desired access level of a file in its shared mode.
For example, I have a file opened with some dwDesiredAccess level flags set using CreateFile API.
Some other process is asking for the same file with a different dwDesiredAccess level flags which may or may not succeed when I call the CreateFile API.

Is there a way I can determine the result of the second CreateFile API without calling it?
ie, is there a way I can validate the second dwDesiredAccess by checking with the first dwDesiredAccess and return ERROR_SHARING_VIOLATION to the client without making a call to CreateFile API?

Please let me know if some good articles or other useful information available anywhere.

Thanks in advance

cheers
Varghese Paul

Re: dwDesiredAccess in CreateFile API

Adam Roderick J25-Aug-09 19:45

Adam Roderick J

25-Aug-09 19:45

Just check GetAclInformation([^] and ACL.

Величие не Бога может быть недооценена.

Re: dwDesiredAccess in CreateFile API

Rajesh R Subramanian25-Aug-09 19:57

Rajesh R Subramanian

25-Aug-09 19:57

Hi Paul,

In a nutshell, you just want to know the available access level of a file and you do not want to call CreateFile if the desired access level is not available for that file? If I have understood your query correctly, then you could try this:

//Use ncheck = 2 to check write permission, 4 for read only permission and 6 for read and write permission.
int nCheck = 0; //0 checks just for the existence of the file.
int nReturn = _taccess(_T("C:\\Users\\Rajesh\\Downloads\\7z465-x64.msi"), nCheck);

if(nReturn == 0)
{
   //Success - The file has the given mode.
}
if(nReturn == -1)
{    
   //The file does not have the given mode!
}

It is a crappy thing, but it's life -^ Carlo Pallini

Re: dwDesiredAccess in CreateFile API

Stuart Dootson25-Aug-09 21:06

Stuart Dootson

25-Aug-09 21:06

Varghese Paul M wrote:
Is there a way I can determine the result of the second CreateFile API without calling it?
ie, is there a way I can validate the second dwDesiredAccess by checking with the first dwDesiredAccess and return ERROR_SHARING_VIOLATION to the client without making a call to CreateFile API?

I don't believe so...and anyway, even if you could, the results could be invalid (by someone opening another handle on the file) before you could use them. Just open the file and be done with it. If it fails, it fails! But Win32 will tell you, through a combination of return code and GetLastError.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

LNK1107

MozhdehQeraati25-Aug-09 18:39

MozhdehQeraati

25-Aug-09 18:39

Hi everybody
I am writing a dll in C++.Net. I had a .h and .cpp file in visual C6.0 and I want to use it here,but there is no lib. First, I set the paths in project properties, but because there is no lib file, I only set the .h file path there. But while compiling there were two LNK errors: LNK2028 and LNK2019. I add it manually in the "Header files" section and "Source Files" section. But there is an error like this while compiling:

LNK1107: Invalid or corrupt file, cannot read at 0x306

I also include it in my code. What's wrong? Would you please help me?
Thanks in advance

Re: LNK1107

Code-o-mat25-Aug-09 20:45

Code-o-mat

25-Aug-09 20:45

Did you add the cpp file to the project? I don't mean the paths to folders where the cpp or header is sitting, i mean the file itself? If not, could it be that the unresolved symbols are defined in that cpp?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

Re: LNK1107

MozhdehQeraati25-Aug-09 21:31

MozhdehQeraati

25-Aug-09 21:31

of course I did. I added both the .h and the .cpp file in the solution explorer.

Re: LNK1107

Stuart Dootson25-Aug-09 21:08

Stuart Dootson

25-Aug-09 21:08

Sounds to me like you're linking against something that claims to be a .lib or .obj file, but isn't - could that be the header file?

I think you actually want to be adding the .h and .cpp files to your project and building them into it.\, from your question.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: LNK1107

MozhdehQeraati25-Aug-09 21:32

MozhdehQeraati

25-Aug-09 21:32

I did it. I added the .h and .cpp file in the solution explorer and build the project. but it doesn't work.

Re: LNK1107

Stuart Dootson25-Aug-09 22:08

Stuart Dootson

25-Aug-09 22:08

MozhdehQeraati wrote:
doesn't work

'Doesn't work' encapsulates sooo many ba things...

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

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