C / C++ / MFC Discussion Boards

antonaras3-Jun-06 4:50

3-Jun-06 4:50

Hi again guys
a simple guestion how can i convert(assighn) a variable of type _bstr_t to string

Thanks a lot for everything so far

Re: _bstr_t to string-newbie

John R. Shaw3-Jun-06 5:01

John R. Shaw

3-Jun-06 5:01

I actually know this is simple, but I forget the answer. I would repost this question in the COM forum if I was you.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

Re: _bstr_t to string-newbie

Michael Dunn3-Jun-06 5:46

Michael Dunn

3-Jun-06 5:46

See The Complete Guide to C++ Strings, Part II - String Wrapper Classes[^]

--Mike--
Visual C++ MVP Cool | :cool:

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Re: _bstr_t to string-newbie

antonaras3-Jun-06 7:12

antonaras

3-Jun-06 7:12

Cool Guide!!!!
very good has everything
thanks for showing me the way

Re: _bstr_t to string-newbie

bob169723-Jun-06 6:37

bob16972

3-Jun-06 6:37

Mr. Dunn already pointed you to his FAQ which is probably the best resource available on CP but just in case, here are some ways you can get it done. NOTE: These will only work if the BSTR does not contain embedded NULL's as would occur in a BYTE array. If you are sure you are dealing with null terminated strings in the BSTR like when using MSXML, these will get you by.

// Using the CString constructor
_bstr_t bstrTemp("This is a test\n");
CString sTemp1((BSTR)bstrTemp);
TRACE(sTemp1);

// For when you don't have the luxury of using the constructor
CString sTemp2;
sTemp2.Format("%s",(LPCTSTR)bstrTemp);
TRACE(sTemp2);

Re: _bstr_t to string-newbie

antonaras3-Jun-06 7:15

antonaras

3-Jun-06 7:15

Thanks bob for the help and the info but u are right
that article Dunn gave me is more than helpful
Thanks again appreciate the help

Re: _bstr_t to string-newbie

ThatsAlok4-Jun-06 23:06

ThatsAlok

4-Jun-06 23:06

antonaras wrote:
Hi again guys
a simple guestion how can i convert(assighn) a variable of type _bstr_t to string

_bstr_t hi("alok");
std::string str((LPCTSTR)hi) ;

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short question about parsing xml in C++ [modified]

Rudy1023-Jun-06 4:24

Rudy102

3-Jun-06 4:24

say I have
class A
{
int a;
int b;
A(int c, int d) { a=c; b=d;}
}

and <A a=2 b=3></A> tag in Xml

how can i simply parse the xml file that i get A(2,3) in my C++ program

which technology should i use? ms xml? is it good? can someone show a short example of using ms xml to the example above?

J

-- modified at 10:25 Saturday 3rd June, 2006

Re: short question about parsing xml in C++ [modified]

Hamid_RT3-Jun-06 4:46

Hamid_RT

3-Jun-06 4:46

See
2-Simple XML Parsing on WinCE 4.2 Using C++ and MSXML 3.0[^] maybe it is some helpful to you

whitesky

Re: short question about parsing xml in C++ [modified]

Nemanja Trifunovic3-Jun-06 5:57

Nemanja Trifunovic

3-Jun-06 5:57

For that kind of parsing, I recommend expat[^]

My programming blahblahblah blog. If you ever find anything useful here, please let me know to remove it.

Re: short question about parsing xml in C++ [modified]

Ravi Bhavnani3-Jun-06 7:12

Ravi Bhavnani

3-Jun-06 7:12

Also see TinyXML[^].

/ravi

My new year's resolution: 2048 x 1536
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doubt in vc++

Javagal Srinath3-Jun-06 3:17

Javagal Srinath

3-Jun-06 3:17

Hi

I am new to vc++. I want to know what is "resources" in vc++ context.

how can this be used with vc++ program I create.

waiting for reply

Re: doubt in vc++

John R. Shaw3-Jun-06 4:57

John R. Shaw

3-Jun-06 4:57

You know I am not sure, there is so many meanings that it boarders on the ridiculous.

1) Windows programming: memory, icons, bitmap, dialog boxes, I/0, and strings.
2) C++: memory, I/O.

Oh, 1 applies to Mac programming too.

A resource is anything that you must draw on to accomplish the goal, including dependency on outside resources such as the Web.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

Re: doubt in vc++

Gary R. Wheeler3-Jun-06 15:16

Gary R. Wheeler

3-Jun-06 15:16

In a Visual C++ program, visual elements in your program (menus, dialog boxes, bitmaps, icons, and some strings) are defined in a source file with the extension .RC, which is referred to as a resource script. This file is compiled and 'linked' into your program. The term "resources" refers to these visual elements.

Software Zen: delete this;

Fold With Us![^]

Ellipse, how to draw without been filled?

includeh103-Jun-06 3:10

includeh10

3-Jun-06 3:10

the DC functions: Ellipse, Rectangle ... are filled by current brush.

I hope they are draw only without been filled.

any idea to do this?

Re: Ellipse, how to draw without been filled?

Hamid_RT3-Jun-06 4:42

Hamid_RT

3-Jun-06 4:42

You can use from Graphic like this

<br />
SolidBrush Brush(Color(255,0,120,120));<br />
Pen pen(&Brush, 4.0f);<br />
Graphics graphics(GetDC()->m_hDC) ;<br />
graphics.DrawEllipse(&pen,100,100,200,200);<br />

whitesky

Re: Ellipse, how to draw without been filled?

includeh103-Jun-06 4:45

includeh10

3-Jun-06 4:45

where is Graphics?

Re: Ellipse, how to draw without been filled?

Hamid_RT3-Jun-06 4:47

Hamid_RT

3-Jun-06 4:47

Can you be more specific
and you need to using namespace Gdiplus;

whitesky

Re: Ellipse, how to draw without been filled?

includeh103-Jun-06 4:59

includeh10

3-Jun-06 4:59

is the class in VC6?

Re: Ellipse, how to draw without been filled?

Hamid_RT3-Jun-06 5:05

Hamid_RT

3-Jun-06 5:05

I have vs2003 and you can see MSDN for Graphics

whitesky

Re: Ellipse, how to draw without been filled?

John R. Shaw3-Jun-06 5:11

John R. Shaw

3-Jun-06 5:11

I seen the reference to ‘graphics’ and understand we are at a crossroads between systems of programming for windows. That being said ignore it and select a NULL brush before drawing the ellipse.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

Re: Ellipse, how to draw without been filled?

Hamid_RT3-Jun-06 5:20

Hamid_RT

3-Jun-06 5:20

Hi John R. Shaw,
you said that create null brush before draw ellipse in CDC
but in graphics if you run this code you see a ellipse with one stroke Smile | :)

whitesky

Re: Ellipse, how to draw without been filled?

includeh103-Jun-06 5:44

includeh10

3-Jun-06 5:44

we target to win95/98 and use VC6.

NULL brush, I tried it before in this way:

CBrush*pb=0;
dc.SelectObject(pb);

but the select is ignored (previous brush is still working).

any comment about null brush?

Re: Ellipse, how to draw without been filled?

Justin Tay3-Jun-06 5:59

Justin Tay

3-Jun-06 5:59

That's not what he meant by null brush.

dc.SelectObject(GetStockObject(NULL_BRUSH));

Re: Ellipse, how to draw without been filled?

John R. Shaw13-Jun-06 21:59

John R. Shaw

13-Jun-06 21:59

Thanks hfry, I have been away and you and others pointed out what I was saying. Smile | :)

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

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