Re: native c++ database - C / C++ / MFC Discussion Boards

VishnuKalyani23-Nov-06 15:04

23-Nov-06 15:04

Hi,
I have two list boxes ( ListBox1 and ListBox2 ) and an EditBox ( Edit1 ) box.

1. Select an item in ListBox1.
2. Enter a string in EditBox and Press Enter Key.
3. The String will go to ListBox2.
4. Like that add any number of items by selecting an item in ListBox1.

Problem : When we select an item in ListBox1, ListBox2 should display all the items we entered under ListBox1 dynamically. How I can achieve this ?

It's kind of fun to do the impossible.

Re: Show subitems of an item in listbox

nguyenvhn23-Nov-06 17:14

nguyenvhn

23-Nov-06 17:14

Create in memory a data structure to store all items in Listbox2 associated with each item in Listbox1. A dictionary or hashing table will be appropriate. When adding an item to listbox2, again adding it to that data structure. When selected item in listbox1 changed, reload all items associated with listbox1 selected item to listbox2.

Hope that helps

Re: Show subitems of an item in listbox

VCSharp00723-Nov-06 17:16

VCSharp007

23-Nov-06 17:16

Think about using a collection class for storing the data(CMap will be better choice)..
Put the item in list1 as "Key" and the items corresponding to it in List2 as "value"(use CStringArray here).

How to disable the joystick by programming

LaHaHa23-Nov-06 14:53

LaHaHa

23-Nov-06 14:53

I would like to know how to disable the joystick by programming?
Please help!

Menu question [modified]

zt978823-Nov-06 14:53

zt9788

23-Nov-06 14:53

I have a appication to load menu from resource, and want to change the menu style dynamically from "POPUP" to "STRING".
I wrote the following code:
pSubMenu->ModifyMenu(6,MF_BYPOSITION|MF_POPUP,(UINT)m_Menu.m_hMenu,"xxxM(&I)\tI");
m_Menu is a pop menu.
And now i want to change the menu style to "STRING":
pSubMenu->ModifyMenu(6,MF_BYPOSITION|MF_STRING,(UINT)IDM_RECV,"xxxM(&I)\tI");
The menu caption and icon was changed, but the menu was still "POPUP" style.
Who can tell me how to solve this problem?

Help!!!

-- modified at 22:52 Thursday 23rd November, 2006

native c++ database

GVR197923-Nov-06 13:44

GVR1979

23-Nov-06 13:44

Hello, where can I found an example to communicate with a database in windows mobile (in native c++ and simple sql strings)

I found on the net that I must use OLEDB with SQL Server Mobile

In java it's very simple to do that

thx

Re: native c++ database

Leah_Garrett23-Nov-06 15:21

Leah_Garrett

23-Nov-06 15:21

What kind of database do you have or need?

Do you plan to have the data locally? I have worked on a mobile application where we just took a snapshot of data as XML locally. We could then just use some standard XML access code for navigating the data.

Re: native c++ database

GVR197928-Nov-06 8:41

GVR1979

28-Nov-06 8:41

hi, I need a real database with sql support for insert records and also query the database

Re: native c++ database

Leah_Garrett28-Nov-06 15:14

Leah_Garrett

28-Nov-06 15:14

I assume Java worked because you had a library you could use. So maybe you could take the same approach with implementing this in C++, look for a library.

Gooling I found: http://www.sqlapi.com/[^]

If your mobile database does not need to connect to another database then you could choose any database supported by the library you choose to use. You might want to look around more to find one with a small foot print.

Error while reading a file.

Lord Kixdemp23-Nov-06 11:06

Lord Kixdemp

23-Nov-06 11:06

Hello everyone! Big Grin | :-D

I'm getting the following error:

Microsoft Visual Studio C Runtime Library has detected a fatal error in Program.exe.

Press Break to debug the program or Continue to terminate the program.

On the marked line:

// Read buffer
char *buf = new char[512];

// Read 4 chars
open.read(buf, 4);
// Add a terminator
buf[4] = '\n';

// Compare
if (!strcmp(buf, "%ETV"))
	exit(1);

// While the end was not reached
while (open.good())
{
	// Read a message type
	open.read(buf, 1);

	// Assign that to our variable
	messageType = buf[0];

	switch (messageType)
	{
		//// Message Type 0x00: Error Message ////
		case '\x00':

		// Read length
		open.read((char*) length, sizeof(short));

		// Read MB icon type, check the corresponding box
		int mbIconType;
		open.read(buf, 1);	// ERROR HERE

		// < More code here > //
	}
}

(open is an ifstream to a binary file)

Am I doing something wrong or what? Thanks! Wink | ;)

PS: Is there any way to make the debugger tell me what's wrong instead of just giving me a line number? Frown | :(

Windows Calculator told me I will die at 28. Frown | :(

Re: Error while reading a file.

CPallini23-Nov-06 11:15

CPallini

23-Nov-06 11:15

What is length (i.e. how is declared)?

Re: Error while reading a file.

User 58385223-Nov-06 11:21

User 583852

23-Nov-06 11:21

I think the problem is the line before the one you've highlighted

try changing
open.read((char*) length, sizeof(short));

to

open.read((char*)(&length), sizeof(short));

System.IO.Path.IsPathRooted() does not behave as I would expect

Re: Error while reading a file.

Lord Kixdemp23-Nov-06 12:07

Lord Kixdemp

23-Nov-06 12:07

OMFG IT WORKS! Laugh | :laugh:

I was reading it into memory address length (short) instead of into the variable... Thanks! Wink | ;)

Windows Calculator told me I will die at 28. Frown | :(

Re: Error while reading a file.

User 58385223-Nov-06 12:10

User 583852

23-Nov-06 12:10

No worries

What about this...

// Add a terminator
buf[4] = '\n';

usually you would terminate a string with '\0'

System.IO.Path.IsPathRooted() does not behave as I would expect

Re: Error while reading a file.

Lord Kixdemp23-Nov-06 14:23

Lord Kixdemp

23-Nov-06 14:23

Oops... I'm just used to seeing that \n all the time... Laugh | :laugh:

Thanks!

Windows Calculator told me I will die at 28. Frown | :(

How to invert image thro 180 degree

Kshitij Pande23-Nov-06 4:30

Kshitij Pande

23-Nov-06 4:30

Please suggest me any correction for this code.
This code is saving image in inverted format.
Smile | :)

//This is for getting data from clipboard in CBitmap's object.
OpenClipboard();
Glb=EnumClipboardFormats(0);
HANDLE hBitMap = GetClipboardData(Glb); //getting from clipboard

if(hBitMap == NULL)
{
AfxMessageBox("Error in Capturing Image");
return;
}
//CBitmap * bmp = CBitmap::FromHandle(hBitMap);

CBitmap bmp;

if(!bmp.Attach((HBITMAP)hBitMap))
{
AfxMessageBox( "Error in Loading Image" );

}

BITMAP bitmap ;
bmp.GetBitmap(&bitmap);

int size = ((bitmap.bmWidth)*(bitmap.bmHeight)*(bitmap.bmBitsPixel))/8;
BYTE *lpBits = new BYTE[size];

::GetBitmapBits((HBITMAP)hBitMap,size,lpBits);

WriteBmp("C\\Patient.bmp",&bitmap,(int*)lpBits);

CloseClipboard();

}

For writing ang saving .bmp file.......

void WriteBmp(char* name,BITMAP *bmp,int* data)
{
BITMAPINFO Bmi;
memset(&Bmi,0,sizeof(BITMAPINFO));
Bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
Bmi.bmiHeader.biWidth = (bmp->bmWidth);
Bmi.bmiHeader.biHeight = (bmp->bmHeight);
Bmi.bmiHeader.biPlanes = 1;
Bmi.bmiHeader.biBitCount = bmp->bmBitsPixel;
Bmi.bmiHeader.biCompression = BI_RGB;
Bmi.bmiHeader.biSizeImage = bmp->bmHeight*bmp->bmWidth*bmp->bmBitsPixel/8;

FILE* image = fopen (name,"wb");
if(image==0)
return;
int h = abs(Bmi.bmiHeader.biHeight);
int w = abs(Bmi.bmiHeader.biWidth);

Bmi.bmiHeader.biHeight=h;
Bmi.bmiHeader.biWidth=w;

int sz = Bmi.bmiHeader.biSizeImage;

BITMAPFILEHEADER bfh;
bfh.bfType=('M'<<8)+('B');

bfh.bfOffBits=sizeof(BITMAPFILEHEADER)+ sizeof(BITMAPINFOHEADER);
bfh.bfSize=sz+bfh.bfOffBits;
bfh.bfReserved1=0;
bfh.bfReserved2=0;

fwrite(&bfh,sizeof(bfh),1,image);
fwrite(&Bmi.bmiHeader,sizeof(BITMAPINFOHEADER),1,image);
fwrite(data,sz,1,image);
fclose(image);
}

[OT] <pre>

toxcct23-Nov-06 4:36

toxcct

23-Nov-06 4:36

please, Edit your message for this[^]

You don't know where to start ? ask a good friend

[VisualCalc 3.0][Flags Beginner's Guide]

Re: How to invert image thro 180 degree

CPallini23-Nov-06 4:41

CPallini

23-Nov-06 4:41

you have to invert the sign of biHeight see the following excerp of (MSDN):

biHeight 
    Specifies the height of the bitmap, in pixels. If biHeight is positive, the
    bitmap is a bottom-up DIB and its origin is the lower-left corner. If
    biHeight is negative, the bitmap is a top-down DIB and its origin is the
    upper-left corner.

hope that helps.
Smile | :)

Design time issue with a /clr projects

dreamz648023-Nov-06 3:47

dreamz6480

23-Nov-06 3:47

Hi Everyone,

I have created a .Net User control which includes reference to a C++ /CLI component developed with /clr . Since there are some unmanaged resoucrces, i am calling the disposing the C++ /CLI in the dipose method of the user control. If we drag and drop this control in to a Windows form and then try to delete it,it is throwing an exception that the "C++ / CLI " dll could not be located.... however it is working fine while running the application
can anyone help me out.The sample code is

///

/// Clean up any resources being used.
///

/// <param name="disposing" />true if managed resources should be disposed; otherwise, false.
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
if (unmanagedComponent != null)
{
unmanagedComponent = null;
}

}

Re: Design time issue with a /clr projects

toxcct23-Nov-06 4:11

toxcct

23-Nov-06 4:11

C++/CLI ? -> ask the Managed C++ forum[^]

You don't know where to start ? ask a good friend

[VisualCalc 3.0][Flags Beginner's Guide]

Issue using CTreeCtrl with Checkboxes and SetCheck()

flippydeflippydebop23-Nov-06 2:52

flippydeflippydebop

23-Nov-06 2:52

Hello there.. I have a CTreeCtrl which has the checkboxes style set. I would like all the checkboxes to be set (ticked) by default.

I have function which loops around all the tree items and calls SetCheck() on each tree item.

However when calling this function from inside OninitDialog the checkboxes do not get set.

If i call this function afer the OninitDialog it works fine. Can anyone help me here.

Re: Issue using CTreeCtrl with Checkboxes and SetCheck()

flippydeflippydebop23-Nov-06 3:00

flippydeflippydebop

23-Nov-06 3:00

ahh-haa... i have found the reason http://groups.google.co.uk/group/microsoft.public.vc.mfc/browse_thread/thread/2ae2e6583698ac21/481e981ec4591749[^]

"This is a weird idiosyncracy of the tree control. It's mentioned in
the Platform SDK docs under the topic "Tree View Control Window
Styles":

"If you want to use this style, you must set the TVS_CHECKBOXES style
with SetWindowLong after you create the treeview control, and before
you populate the tree. Otherwise, the checkboxes might appear
unchecked, depending on timing issues. "

Checking URL is Valid or Not through MFC

kiranin23-Nov-06 1:17

kiranin

23-Nov-06 1:17

How can we check whether URL is Valid or not through a MFC Application?

Re: Checking URL is Valid or Not through MFC

Anilkumar K V23-Nov-06 1:34

Anilkumar K V

23-Nov-06 1:34

PathIsURL() API
Refer MSDN

Re: Checking URL is Valid or Not through MFC

kiranin23-Nov-06 1:39

kiranin

23-Nov-06 1:39

It is just checking URL is valid format or not, but what i want is whether the URL path is exixt or not. for example if we give www.goooggle.com, the i want to tell it is not valid...

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