Re: BSTR Conversion - C / C++ / MFC Discussion Boards

Vladimir Georgiev4-Jan-02 10:20

4-Jan-02 10:20

I will begin looking into it if people are interested.

What do you mean by "begin looking into it"...?
Don't you have any knowledge on DirectX 8 yet?

Enjoy your life...

Re: DirectPlay 8+

Vladimir Georgiev4-Jan-02 10:20

Vladimir Georgiev

4-Jan-02 10:20

I will begin looking into it if people are interested.

What do you mean by "begin looking into it"...?
Don't you have any knowledge on DirectX 8 yet?

"Needless redundancy is the hobgoblin of the software engineering." - Peter Darnell

RECURSING THROUGH A SUBDIRECTORY

Maverick3-Jan-02 7:40

Maverick

3-Jan-02 7:40

I want to get all the files from a specific directory.

How do I do it? I have no problems manipulating a single file.. my problem is on how to loop through the directory to get all files in it...
Cool | :cool:

Re: RECURSING THROUGH A SUBDIRECTORY

Jon Sagara3-Jan-02 7:44

Jon Sagara

3-Jan-02 7:44

Call ::FindFirstFile(...), and then call ::FindNextFile(...) recursively.

Jon Sagara

"There are lies, damned lies and statistics."
-- Mark Twain.

Re: RECURSING THROUGH A SUBDIRECTORY

Nemanja Trifunovic3-Jan-02 7:47

Nemanja Trifunovic

3-Jan-02 7:47

You can use _findfirst and _findnext

I vote pro drink Beer | [beer]

BSTR Conversion

3-Jan-02 7:13

Hi All,
I'd appritiate is someone show me the way to display BSTR type variable. How can I convert it in to char*?
Thanks for taking time to write in.
-- Sumit
PS: Please CC it to sumit@elitecore.com

Re: BSTR Conversion

Ernest Laurentin3-Jan-02 8:11

Ernest Laurentin

3-Jan-02 8:11

void Display(BSTR strText)
{
  _bstr_t strConvText( strText, true );
  // use strConvText as char*, const char*, wchar_t*, const wchar_t*
  // like
  printf("Text is:%s\n", (char*) strConvText);
}

- God bless the World

Re: BSTR Conversion

James R. Twine3-Jan-02 8:45

James R. Twine

3-Jan-02 8:45

Sumit Pandya wrote:
I'd appritiate is someone show me the way to display BSTR type variable.

   Display it where?  In the Watch Window?  In a dialog?  To stdout?  Many of the API and library functions have a "wide" version, which can handle BSTRs (which are basically wide-character strings).

Sumit Pandya wrote:
How can I convert it in to char*?

   The "WideCharToMultiByte(...)" function may be what you are looking for.  If you KNOW that the BSTR only contains printable ASCII characters, you can do a "quick-n-dirty" conversion by copying character by character into a "char" buffer, and just casting the wide character to a "char".

   Peace!

-=- James.

Re: BSTR Conversion

Philip Patrick3-Jan-02 9:17

Philip Patrick

3-Jan-02 9:17

Yep, all answers are right... but you can use the simpliest way Smile | :)

Look here:

#include <atlconv.h>
...
BSTR bsWideCharString; //initialized somewhere
CString csResultString;

USES_CONVERSION;
csResultString = OLE2T(bsWideCharString);

Isn't easy? Smile | :)

Philip Patrick
"Two beer or not two beer?" <shakesbeer>
Web-site: www.saintopatrick.com

Re: BSTR Conversion

Bill Wilson3-Jan-02 10:24

Bill Wilson

3-Jan-02 10:24

Even easier, this seems to work for me.

  BSTR bstrOriginal;
  char * pChars;
...
  pChars = (char *) (_bstr_t) bstrOriginal;

This code casts the BSTR to a _bstr_t wrapper class. _bstr_t class has a (char *) conversion method. This returns a converted copy of the string. It is NOT a cast.

Thanks for the help,
Bill

Re: BSTR Conversion

James R. Twine3-Jan-02 10:40

James R. Twine

3-Jan-02 10:40

Easy, yes. The conversion macros are usually faster than wasting a bstr_t object to do the conversion, too. (Although assigning it to the CString will likely waste the time you just saved! Smile | :)

)

But you have to be careful with them! They can cause problems if used in a loop, an exception handler, or if you are dealing with a large amount of data.

Peace!

-=- James.

CRecordSet::Update() or ::Edit()

3-Jan-02 6:59

´ve a problem with crecordset::update()!
i´ve created a user-dsn(excel 2000 derivied) and with the class-wizard a crecordset derivied.
if i call edit(); i get an error message that the datagroups are readonly, but i've used dynaset!
i need a solution!!! please

thanx

i´m german, i know the quality of my english...:
confused:

Re: CRecordSet::Update() or ::Edit()

3-Jan-02 9:23

i've used crecordset::none in the openflags!

Re: CRecordSet::Update() or ::Edit()

Carlos Antollini3-Jan-02 9:37

Carlos Antollini

3-Jan-02 9:37

For make a Recordset updatable you need to open the table editing all Fields. Some times if you make a select that include oll the index fields, you will must have no problems, but sometimes that don't works.
Is more secure to open the table, (The sheet in your case) in the CRecordset::Open()...

Best Regards

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: CRecordSet::Update() or ::Edit()

5-Jan-02 9:23

m_clientset is a Object of CClientSet and CClientSet is class(created with the class wizard). In the Excel table there is one Database(one Sheet) which is called "Kunden". The User-DSN is named CASAK and it´s a Microsoft Excel Driver(97-2000) and is prepared for only this one file.

m_clientset.Open(CRecordset::dynaset,"Kunden",CRecordset::none);
if(!m_clientset.CanUpdate())
AfxMessageBox("no update");
if(!m_clientset.CanTransact())
AfxMessageBox("no transact");

I don't know how shall I continue.
Confused | :confused:

Karsti

creating an array from a variable? (CString mystring[variable] )

Kuniva3-Jan-02 6:41

Kuniva

3-Jan-02 6:41

How can i create a string array from a variable amount like for example this:

<br />
int Count = 99;<br />
CString Data[Count];<br />

???

Kuniva

Re: creating an array from a variable? (CString mystring[variable] )

Nemanja Trifunovic3-Jan-02 7:55

Nemanja Trifunovic

3-Jan-02 7:55

Use CStringArray, or STL vector <CString>

I vote pro drink Beer | [beer]

SendMessege()

Ever12343-Jan-02 6:17

Ever1234

3-Jan-02 6:17

Could someone clear this up for me. Like tell me all the stuff about it.

"To wonder is to begin to understand"

Re: SendMessege()

Ravi Bhavnani3-Jan-02 6:31

Ravi Bhavnani

3-Jan-02 6:31

SendMessage() sends a message to a window. This means, it places the message in the target window's message queue, waits for it to be processed, and then returns. PostMessage() simply places the message in the target's queue and returns immediately.

/ravi

"There is always one more bug..."
ravib@ravib.com
http://www.ravib.com

Re: SendMessege()

Kuniva3-Jan-02 6:35

Kuniva

3-Jan-02 6:35

uh, i dont know all about it but i believe it is just a function to send certain messages to a window like this:

<br />
SendMessage(WM_CLOSE,0,0);<br />

This for instance would send a WM_CLOSE message to your window and if that window has a handler for the message to close it, the window will be closed. There's all sorts of messages (see winuser.h). WM means its a window message, you also have messages for buttons and other objects, for instance, button messages start with "BN".
The two 0's are the wParam and the lParam, these are optional parameters, for example if a window receives a WM_COMMAND message it means someone pressed a button or did another command, then you can find what command by looking at the wParam.

Kuniva

Connect to internet using standard windows connecting "system"

Rickard Andersson²⁰3-Jan-02 6:01

Rickard Andersson²⁰

3-Jan-02 6:01

I want my app to launch the standard Internet connection. That one you create to connect to internet.
I know the InternetDial function only... is there another better API or something?

The problem is I don't know one of the parameters:

lpdwConnection
Address of an unsigned long integer value containing the number associated to the connection.

How to get known of that?

------------------------------
©0d3 ©®4©k3® - That's me! Smile | :)

------------------------------

Re: Connect to internet using standard windows connecting "system"

Not Active3-Jan-02 7:03

Not Active

3-Jan-02 7:03

lpdwConnection is an out parameter. You don't need to know it, it will be returned to you.

You may also want to look into InternetAutodial or InternetGoOnline

Re: Connect to internet using standard windows connecting "system"

Vladimir Georgiev4-Jan-02 10:26

Vladimir Georgiev

4-Jan-02 10:26

Maybe you should look at the RasDial() function at the MSDN library, and rate my posting if it helped you Smile | :)

Enjoy your life...

How to Edit Recordset?

Mazdak3-Jan-02 5:28

Mazdak

3-Jan-02 5:28

I want to write database application,I want to Edit some of
my recordsets.I used this code but I don't know how to edit
recordsets:

CDatabase aDB;

try
{
aDB.OpenEx("DSN=MyDSN");
CRecordset aRS(&aDB);
aRS.Open(CRecordset::dynaset,"SELECT *from mytable");

while(!aRS.IsEOF())
{
CString strValue;
aRS.GetFieldValue(short(5),strValue);
CString str;

if(/*something here*/)
{
Confused | :confused:

???????????
aRS.Edit();
Confused | :confused:

?????????????
}
aRS.MoveNext();
}
aRS.Close();
aDB.Close();

}
catch(CDBException *ex)
{
TCHAR buf[255];
ex->GetErrorMessage(buf,255);
CString str;
AfxMessageBox(str);
}

Passing a CListBox to a function

Kuniva3-Jan-02 5:14

Kuniva

3-Jan-02 5:14

Is there any way to pass a CListBox control to a function so it can be used in the function and so you can use the function with the different listboxes of a dialog. Lets just say for example i want to write a function to clear a CListBox control:

<br />
void ClearListBox(CListBox list)<br />
{<br />
int count = list.GetCount();<br />
CString Data[999];<br />
<br />
for(int i=0;i<=count-1;i++)<br />
{<br />
list.DeleteString(i);<br />
}<br />

and to use it i'd do this:

<br />
ClearListBox(m_Listone);<br />
ClearListBox(m_Listtwo);<br />
...<br />

Whats the easiest way to do something like this?

Kuniva

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.