Re: Deleting a item from ComboBox.. - C / C++ / MFC Discussion Boards

mpallavi30-Jun-05 20:40

30-Jun-05 20:40

Thanx.. its working. I have still more problems with ComboBox..
I am saving all these telephone numbers in a text file.. If you remember, few days back i was coding for persistent combo box. Its working perfactly fine but the problem is when i delete a number.
I am creating a temp file .. i want to write all the values in this file except for the current selection..
how do i go about this?
pallavi

Re: Deleting a item from ComboBox..

ThatsAlok30-Jun-05 21:00

ThatsAlok

30-Jun-05 21:00

mpallavi wrote:
I am creating a temp file .. i want to write all the values in this file except for the current selection..
how do i go about this?

Let this variable m_arr of type CStringArray contain all the phone number present in combo box.

  <font color=#008000>// first get Phone Number to delete</font>
   CString szPhoneNo;

   int nIndex=m_combo.GetCurSel();
  if(nIndex!=CB_ERR)  <font color=#008000> //thanks to Mr. Rios :)</font>
 {
   m_combo.GetLBText(nIndex,szPhoneNo);
 }
else
  <font color=#008000> // no string to delete from file</font>
  return;


  <font color=#008000> // Open Temporary File</font>
 CString szTempPath;
 GetTempPath(szTempPath.GetBuffer(MAX_PATH),MAX_PATH);

  <font color=#008000> // release buffer get control of Path</font>
 szTempPath.ReleaseBuffer();

  <font color=#008000> //Include our File Name in path</font>
 szTempPath+=CString("temp.txt");

  <font color=#008000> // Now Open Text File</font>
 CStdioFile m_File;


 if(m_File.Open(szTempPath,CFile::modeCreate|CFile:modeWrite))
{

  for(int i=0;i<m_arr.GetUpperBound();i++)
  {
  <font color=#008000>   //copy data </font>
     if(m_arr.GetAt(i)!=szPhoneNo)
      m_File.WriteString(m_arr.GetAt(i));
   
  }
  
  m_File.Close();
}

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Deleting a item from ComboBox..

mpallavi30-Jun-05 21:20

mpallavi

30-Jun-05 21:20

ThatsAlok wrote:
GetTempPath(szTempPath.GetBuffer(MAX_PATH),MAX_PATH);

I am getting the following error at above line:
'GetTempPathA' : cannot convert parameter 1 from 'char *' to 'unsigned long'
Please help.

Re: Deleting a item from ComboBox..

ThatsAlok30-Jun-05 21:28

ThatsAlok

30-Jun-05 21:28

mpallavi wrote:
GetTempPath(szTempPath.GetBuffer(MAX_PATH),MAX_PATH);

Sorry, Just Exchange Argument Smile | :)

i.e.

GetTempPath(MAX_PATH,szTempPath.GetBuffer(MAX_PATH));

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Deleting a item from ComboBox..

mpallavi30-Jun-05 22:26

mpallavi

30-Jun-05 22:26

Hi Alok..
temp file is getting created but its empty.. i am trying to find what went wrong.. Frown | :(

regards
pallavi

Re: Deleting a item from ComboBox..

mpallavi1-Jul-05 1:44

mpallavi

1-Jul-05 1:44

oops..
My array of strings is empty.. I used
m_arr.Add(m_strPhoneNum);
to add phone numbers in the array.
I think the syntax is wrong..
pallavi.

Re: Deleting a item from ComboBox..

David Crow1-Jul-05 16:52

David Crow

1-Jul-05 16:52

mpallavi wrote:
m_arr.Add(m_strPhoneNum);

what is m_arr, and how are you iterating throught it when writing to the file?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Deleting a item from ComboBox..

ThatsAlok1-Jul-05 18:39

ThatsAlok

1-Jul-05 18:39

mpallavi wrote:
to add phone numbers in the array.
I think the syntax is wrong..

Hi Pal,
First Add all the member of ComboBox to CStringArray or directly Enumerate them, When you are entering data in temporary File.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

How to use the metafile DC in WIN32 API programming

pradish30-Jun-05 18:47

pradish

30-Jun-05 18:47

Hi all

can anybody help me out with a sample,that can store some GDI calls and later play it back, i came to know that metafile device context can be used for this purpose

thanks for your help

regads
pradish Confused | :confused:

Re: How to use the metafile DC in WIN32 API programming

Jose Lamas Rios30-Jun-05 19:15

Jose Lamas Rios

30-Jun-05 19:15

Would this help?
How to Create & Play Enhanced Metafiles in Win32[^]

If you want to use MFC, these other articles might help:
CMetaFile class[^]
MFC Library: CMetaFileDC[^]

--
jlr
http://jlamas.blogspot.com/[^]

Re: How to use the metafile DC in WIN32 API programming

pradish30-Jun-05 20:07

pradish

30-Jun-05 20:07

2 Jose Lamas Rios

thanks for ansering my mail,but i need a sample that makes use of Win32 GDI API's only. no MFC.

regards
pradish

Re: How to use the metafile DC in WIN32 API programming

Jose Lamas Rios30-Jun-05 20:18

Jose Lamas Rios

30-Jun-05 20:18

pradish wrote:
thanks for ansering my mail,but i need a sample that makes use of Win32 GDI API's only. no MFC.

That was the first link. It's about using metafiles with Win32 APIs (No MFC) and includes a downloadable sample...

--
jlr
http://jlamas.blogspot.com/[^]

How to insert a "," in an array?

Member 199230330-Jun-05 15:27

Member 1992303

30-Jun-05 15:27

Hi does anyone know how to insert commas in array?
example: 2,3
3,3
4,2
I need to show these commas when I execute the program.
Pls advice.

Re: How to insert a "," in an array?

Christian Graus30-Jun-05 15:51

Christian Graus

30-Jun-05 15:51

for (int i = 0; i < arraySize-1; ++i)
{
cout << array[i] << ", ";
}

cout << array[arraySize-1];

Christian Graus - Microsoft MVP - C++

Re: How to insert a "," in an array?

Jose Lamas Rios30-Jun-05 16:22

Jose Lamas Rios

30-Jun-05 16:22

Christian Graus wrote:
for (int i = 0; i < arraySize-1; ++i)
{
cout << array[i] << ", ";
}

cout << array[arraySize-1];

Right, but don't forget to test for the empty array condition. The for loop checks it itself, but the last sentence may attempt to access array[-1].

--
jlr
http://jlamas.blogspot.com/[^]

Dialog Position

Archer28230-Jun-05 14:21

Archer282

30-Jun-05 14:21

Okay, I have a dialog, made with the resource editor, im using it as my main window, and im using Pure Win32, no MFC!, and i want this dialog to be positioned by the system like a normal window would be if you had created the window with CreateWindow() and specified CW_USEDEFUALT for the X paramater, but i dont know how to get my window to do this.

and please, if you dont know exactly what i am asking then dont bother trying to answer

Re: Dialog Position

David Crow30-Jun-05 17:03

David Crow

30-Jun-05 17:03

Position the dialog to your liking in response to the WM_INITDIALOG message. Use:

SetWindowPos(..., CW_USEDEFAULT, CW_USEDEFAULT, ...);

for the x and y parameters.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Dialog Position

flystar70730-Jun-05 20:13

flystar707

30-Jun-05 20:13

MoveWindow(x,y,cx,xy)

Re: Dialog Position

Archer28230-Jun-05 20:19

Archer282

30-Jun-05 20:19

tried this, it positions the window off screen

Re: Dialog Position

David Crow1-Jul-05 3:04

David Crow

1-Jul-05 3:04

Does MoveWindow() produce the same result? I'm not sure if either support CW_USEDEFAULT.

You might want to explain this requirement further. Perhaps there's a better alternative.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

ADO Seek method

ldaoust30-Jun-05 14:14

ldaoust

30-Jun-05 14:14

Hi,

I am trying to use the Seek method in an ADO recordset object. It works fine if the index is only one field. For an index with multple fields, say two strings, I cannot seem to make it work properly.

MSDN says that the first argument is a Variant array.

example code:
_variant_t varKeys[2];
varKeys[0] = "value1";
varKeys[1] = "value2";
m_pRecordset->Seek( varKeys, adSeekFirstEQ );

What happens is that only the first value seems to taken into account.

Any ideas ?

note: I am using an MDB (Access) database. Opening using Jet4 conenct string.

thanks,
Louis.

Re: ADO Seek method

Jose Lamas Rios30-Jun-05 17:52

Jose Lamas Rios

30-Jun-05 17:52

ldaoust wrote:
MSDN says that the first argument is a Variant array.

It seems like rather than an array of variants, what you need is a single variant containing an array of values.

Check this article[^].

--
jlr
http://jlamas.blogspot.com/[^]

Re: ADO Seek method

ldaoust30-Jun-05 18:21

ldaoust

30-Jun-05 18:21

Great, thanks. Got it to work based on that article.

thanks again.

--
Louis.

MFC problem with using new and delete or making classes

Ianel30-Jun-05 13:06

Ianel

30-Jun-05 13:06

If I have a class made in my MFC application I am making I get a very fun bug. This also happens if i call delete on an object I have allocated and of course even though a memory leak when a homemade class goes out of scope.
So tell me how can i make a class or use delete on objects or eve my own classes? Here are my linker errors:

Prog error LNK2005: "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined in libcpmtd.lib(newop.obj)
Prog error LNK2005: "void __cdecl operator delete(void *)" (??3@YAXPAX@Z) already defined in LIBCMTD.lib(dbgdel.obj)
Prog fatal error LNK1169: one or more multiply defined symbols found

Isn't that great? So i narrowed it down to creating a class and it going out of scope as well as the call of a destructor or even just deleting a simple character array.

Re: MFC problem with using new and delete or making classes

Christian Graus30-Jun-05 14:43

Christian Graus

30-Jun-05 14:43

I suspect the problem is your sytnax when you call new and delete. It obviously thinks you're trying to define these operators, or at least that they are multiply defined elsewhere.

Try creating a brand new project, and adding a char * with new and delete in your main. If that doesn't work, your compiler setup is screwed. OTherwise, your project is somehow screwed.

Christian Graus - Microsoft MVP - C++

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