REG_BINARY size problem? - C / C++ / MFC Discussion Boards

Christian Graus18-Sep-05 15:08

18-Sep-05 15:08

I've written a C# app that was a video jukebox, controlled by custom input devices ( not touch screen ). The only issues I had were with Managed DX ( it sucks ). The rest went like a dream, once I moved to the Windows Media Player control.

Christian Graus - Microsoft MVP - C++

GUI themes for Windows application

Member 190283715-Sep-05 17:39

Member 1902837

15-Sep-05 17:39

Popular Microsoft products including Office 2000/XP/2003 comes with a set of GUI themes. I wonder if these themes are supported by Windows system
or customarily created as library (toolkit) such as
"Prof-UIs", "extreme toolkitPro"?
If it the themes have to be created customarily that means toolkit have to mimic all the appearances and behaviors of Microsoft Office 2000/XP/2003, it seem a redundancy work for the application developer...

I'm looking forward for the answers
Thank you

MFC connect to Crystal report using Microsoft Access

bryan52315-Sep-05 17:32

bryan523

15-Sep-05 17:32

Hi all,

I face a problem which when i run my program and click on display button,
then windows pop up "unable to open database"?

did my coding below got problem?

void CDisplay_Crystal_RPTDlg::OnDisplay() <br />
{<br />
	// TODO: Add your control notification handler code here<br />
	// by default the ID of the CCrystalCtrl  is  IDC_CRYSTALREPORT1<br />
  <br />
  UpdateData(TRUE);<br />
  // by default the ID of the CCrystalCtrl  is  IDC_CRYSTALREPORT1<br />
  CCrystalCtrl *m_cryscontrol = <br />
               ( CCrystalCtrl*)( GetDlgItem(IDC_CRYSTALREPORT1));<br />
  CString str;<br />
  str = "{Table1.ID} = 1";<br />
  // where Table1 and Name is a name and a field<br />
  //in your Database, m_StudentName is a member variable of an edit box.<br />
 <br />
  m_cryscontrol->SetReportFileName("C:\\Documents and Settings\\Owner\\My Documents\\Bryan\\C++code\\Display_Crystal_RPT\\Report1.rpt");<br />
  m_cryscontrol->SetSelectionFormula(str);<br />
  m_cryscontrol->SetDiscardSavedData(TRUE);<br />
  m_cryscontrol ->SetAction(TRUE); <br />
  UpdateData(FALSE);<br />
}

acess violation...

Tim Zorn15-Sep-05 13:54

Tim Zorn

15-Sep-05 13:54

i cant figure out why theres an access violation below

<br />
WCHAR t[] = "image/bmp";<br />
CLSID id;<br />
GetEncoderClsid(t, &id);<br />
<br />
Bitmap* bmp = 0;<br />
bmp->FromHBITMAP(hBmpFileBitmap,0);<br />
<br />
EncoderParameters encoderParameters;<br />
encoderParameters.Count = 1;<br />
encoderParameters.Parameter[0].Guid = EncoderQuality;<br />
encoderParameters.Parameter[0].Type = EncoderParameterValueTypeLong;<br />
encoderParameters.Parameter[0].NumberOfValues = 1;<br />
<br />
ULONG quality = 100;<br />
encoderParameters.Parameter[0].Value = &quality;<br />
<br />
bmp->Save(t2,&id,&encoderParameters); //access violation here<br />

help would be appreciated
thanks a bunch Smile | :)

Re: acess violation...

Christian Graus15-Sep-05 14:15

Christian Graus

15-Sep-05 14:15

Tim Zorn wrote:
bmp->Save(t2,&id,&encoderParameters); //access violation here

What's t2 ?

Also, the FromHBitmap method is static on the class, and RETURNS the Bitmap object. Your Bitmap is probably still NULL.

Christian Graus - Microsoft MVP - C++

-- modified at 20:16 Thursday 15th September, 2005

Re: acess violation...

Tim Zorn16-Sep-05 12:16

Tim Zorn

16-Sep-05 12:16

ok thanks. but now when it saves its the right size but blank. i think it has something to do with the pallette can u tell me what it is and how to make one?

help would be appreciated
thanks

Re: acess violation...

Christian Graus18-Sep-05 11:02

Christian Graus

18-Sep-05 11:02

Tim Zorn wrote:
i think it has something to do with the pallette

The fact that you're setting quality makes me thing you're saving a jpeg. Only greyscale jpegs have a pallete, and it's fixed ( because it's greyscale ).

I'd break the process into steps. Load your image, then draw it on the screen. If it's OK there, then the problem is the saving code. Simplify that, and add stuff back in until it breaks.

Christian Graus - Microsoft MVP - C++

REG_BINARY size problem?

YaronNir15-Sep-05 11:18

YaronNir

15-Sep-05 11:18

i have the following struct:

typedef struct
{
	TCHAR s1[20];
	TCHAR s2[20];
	int i;
	TCHAR s3[5];
	TCHAR s4[5];
	TCHAR s5[10];
}stMyStruct;

notice that sizeof(stMyStruct) is exactly 64!

now, i open a reg key and try to set the value to that struct this is what i do:

HKEY hKey = NULL;
CString szSubKey = _T("Software\\Test\\MyTest");
LONG lRet = RegCreateKeyEx(HKEY_CURRENT_USER,
			   szSubKey,
			   0,
			   NULL,
			   0,
			   KEY_ALL_ACCESS,
			   NULL,
			   &hKey,
			   NULL);
if (lRet != ERROR_SUCCESS)
{
       RegCloseKey(hKey);
       ASSERT(FALSE);
}
		

DWORD dwType = REG_BINARY; 
DWORD dwSize = 64; // size of stMyStruct --> maybe this is the problem????
lRet = RegSetValueEx(hKey,
		    _T("MyValue"),
		     0,
		   dwType,
		 (LPBYTE)&pInfo, // info is a pointer to stMyStruct
		  dwSize);
RegCloseKey(hKey);

i see new entry in the registry, but i am not sure it is valid!!

now i try to read the value using this code:

stMyStruct* pInfo = NULL;

// read all the MRUs from the registry
HKEY hKey = NULL;
CString szSubKey = _T("Software\\Test\\MyTest");
LONG lRet = RegOpenKeyEx(HKEY_CURRENT_USER,
			 szSubKey,
			 0,
			 KEY_READ,
			 &hKey);
	
if (lRet != ERROR_SUCCESS)
{
     RegCloseKey(hKey);
}


DWORD dwType = REG_BINARY;
DWORD dwSize = 64; // again  the size of stMyStruct
lRet = RegQueryValueEx(hKey,
		   _T("MyValue"),
		   0,
		   &dwType,
		   (LPBYTE)&pInfo,
		   &dwSize);
if (lRet != ERROR_SUCCESS)
{
	RegCloseKey(hKey);
}

here nothing fails but the pInfo data members are invalid!!!

any help?

thanks in advanced
Yaron

Ask not what your application can do for you,
Ask what you can do for your application

Re: REG_BINARY size problem?

Graham Bradshaw15-Sep-05 13:35

Graham Bradshaw

15-Sep-05 13:35

YaronNir wrote:
(LPBYTE)&pInfo

If pInfo is a pointer to the data, you want to pass pInfo, not &pInfo (note the extra "&"). Currently you're passing the address of the address of the data structure.

Re: REG_BINARY size problem?

YaronNir16-Sep-05 2:02

YaronNir

16-Sep-05 2:02

nicely said! will try that and let you know

thanks
Yaron

Ask not what your application can do for you,
Ask what you can do for your application

Re: REG_BINARY size problem?

YaronNir16-Sep-05 11:29

YaronNir

16-Sep-05 11:29

ok it worked fine...

just wanted to ask you an other thing

suppose i have a key in the registry called "MyKey" and i have binary values each of them is called "MyVal"

i want to enumerate those values and read into my struct these values

i saw in the MSDN there is a method called "KeyEnum

DWORD dwType = REG_BINARY;
DWORD dwSize = sizeof(stMyStruct);
DWORD dwIndex(0);
DWORD dwValSize = 6; // size of MyVal
while (ERROR_NO_MORE_ITEMS != RegEnumValue(hKey,dwIndex,
_T("MyVal"),&dwValSize,0,&dwType,(LPBYTE)pInfo,&dwSize))
{
AddNewInfo(pInfo);
}

problem is i get an assert using this code...

can u help again?
thanks
Yaron

Ask not what your application can do for you,
Ask what you can do for your application

Re: REG_BINARY size problem?

Graham Bradshaw16-Sep-05 11:37

Graham Bradshaw

16-Sep-05 11:37

You need to read the MSDN docs for this functiona a bit more carefully. This function is used to enumerate the values in a key, so passing in the value (MyVal) in your case, makes no sense.

Re: REG_BINARY size problem?

YaronNir17-Sep-05 1:21

YaronNir

17-Sep-05 1:21

right again! silly approach...

so suppose i have this entry:

key in registry is MyKey under it there can be one or more values named MyVal

each of them is a REG_BINARY value which represent my struct...

how can i enumerate all of them?

thanks for all the help

Yaron

Ask not what your application can do for you,
Ask what you can do for your application

Re: REG_BINARY size problem?

Graham Bradshaw17-Sep-05 8:40

Graham Bradshaw

17-Sep-05 8:40

YaronNir wrote:
key in registry is MyKey under it there can be one or more values named MyVal

This is what's confusing me - in any key in the registry, there can only be on entry with a particular name. You can't have two values both named MyVal under the same key.

Re: REG_BINARY size problem?

YaronNir17-Sep-05 19:57

YaronNir

17-Sep-05 19:57

i've told you wrong, my bad....

i've manage to read all the values (enumerate) under the MyKey key...
they appear as MyVal1 MyVal2 etc.....

using the RegEnumValue did the trick!

thanks for all the help Smile | :)

Yaron

Ask not what your application can do for you,
Ask what you can do for your application

Re: REG_BINARY size problem?

kakan15-Sep-05 21:43

kakan

15-Sep-05 21:43

In addition to the answer from Graham Bradshaw, I would like to make another comment.

You assume that your struct is 64 bytes. That might be an incorrect assumption, since it depends on how you set "struct member alignment" in Visual Studio.
Default is 8 bytes, so if you haven't changed it, your assumption is wrong, your struct isn't 64 bytes.

Use sizeof(stMyStruct) to get the real size!

Re: REG_BINARY size problem?

YaronNir16-Sep-05 1:56

YaronNir

16-Sep-05 1:56

thanks for the comment!

i did use sizeof and print to you the result (64!)

thanks anyway

Yaron

Ask not what your application can do for you,
Ask what you can do for your application

Crash on dev studio but works on command prompt

valerie9915-Sep-05 10:32

valerie99

15-Sep-05 10:32

hi, all

this app will get access violation at the end of the
void CSurchrgDlg::Exit()
{
if( !m_bCanceled )
{
m_theApp.AddRptText ("Add Surcharge finished successfully");
}
CDialog::OnCancel();
}
but if I run the exe from command promt, it will work and create the right report, I am not sure why it would get any error over command promt, even is debug version of exe. and why would the access violation show up at the end of exit function, seems like there is nothing to access at this point. Thanks for your time

CHttpFile->WriteString

aman200615-Sep-05 10:28

aman2006

15-Sep-05 10:28

Hi
I have one CString strData with data and i want to send it on to the server in Chunk of 500 Bytes only.Please tell me how can i do that. Right now i am sending it as whole. here is the code

strData = _T("Data=") + URLEncode2(strData);
pHttpFile->AddRequestHeaders(strHeaders);
pHttpFile->SendRequestEx(strData.GetLength());
pHttpFile->WriteString(strData);

Thanks
Shailesh

Re: CHttpFile->WriteString

David Crow15-Sep-05 10:33

David Crow

15-Sep-05 10:33

Why not use something like:

int x = 0;
do
{
    CString strSend = strData.Mid(x, 500);
    x = x + 500;
    // send it now
} while (! strSend.IsEmpty());

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

Re: CHttpFile->WriteString

aman200615-Sep-05 10:50

aman2006

15-Sep-05 10:50

While going into loop it throws the exception at

strSend = strData.Mid(x,500) after going into loop 2 or 3 times . May be it is reached at the end of strData.
Any Suggestion

Thanks
Shailesh

Re: CHttpFile->WriteString

David Crow15-Sep-05 16:52

David Crow

15-Sep-05 16:52

Stepping into the call to CString::Mid() that asserts would have revealed the problem (hopefully). If the length of the string at point x is less than 500, ...

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

micro control

samira forooghi15-Sep-05 9:43

samira forooghi

15-Sep-05 9:43

hi.
i want send a binery file to microcontrol(flash).
please help me

Re: micro control

Cedric Moonen15-Sep-05 20:44

Cedric Moonen

15-Sep-05 20:44

Did you ask at your local post office ? Big Grin | :-D

Re: micro control

Eytukan15-Sep-05 23:58

Eytukan

15-Sep-05 23:58

hey! u got a vote! cheers!.. BTW who did that?

V

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