C / C++ / MFC

how to disable collapsing a tree item?

4-Jun-07 20:49

Try specifying some access parameters in the OpenDriver() Function.

nave

[OpenedFileFinder]

Namedpipe

charian09204-Jun-07 19:29

charian0920

4-Jun-07 19:29

Hi ...

I'm using namedpipe for my interprocess communication.

For each client that requires communication will have a separate instance of the namedpipe.
My question is: is there an API that I could use to get the number of active instances of a namedpipe?

I need this so that when my process ends it will wait first for the nedpipe server to disconnect before exiting my process.

Thanks in advance ... Smile | :)

Re: Namedpipe

Mark Salsbery5-Jun-07 5:33

Mark Salsbery

5-Jun-07 5:33

Maybe GetNamedPipeHandleState() using the lpCurInstances parameter.

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Namedpipe

charian092024-Jun-07 22:41

charian0920

24-Jun-07 22:41

hi mark,

thanks for the suggestion.
however, i tried searching it in the net and couldn't find any sample implementation that uses the GetNamedPipeHandleState API.

I also tried coding like this:

DWORD dwCurIntances;
DWORD dwState;

dwCurIntances = 0;
dwState = 0;
while ( TRUE )
{
// Wait for all the namedpipe instances to close first
if( !GetNamedPipeHandleState( (HANDLE) hClientReqPipe, &dwState, &dwCurIntances, NULL, NULL, NULL, 0 ) )
{
dwResult = GetLastError();
strLog.Format( "@@@@@@@@@@@@@@@@@@@@ GetNamedPipeHandleState Error: %d.", dwResult );
fnAddToMessageLog( 0, strLog );
break;
}

if ( dwCurIntances == 0 )
{
strLog.Format( "@@@@@@@@@@@@@@@@@@@@ All namedpipe instances have been closed." );
fnAddToMessageLog( 0, strLog );
break;
}
}

but I think it does not go the way I expected it.
I'm expecting that the value of dwCurIntances during the startup is "1", since I have created the namedpipe once only. the value I get is "7".

would appreciate your help.

thank you. Smile | :)

Re: Namedpipe

Mark Salsbery25-Jun-07 7:30

Mark Salsbery

25-Jun-07 7:30

Hmm I'm not sure how you're getting 7.

I tried your code after a single CreateNamedPipe() call and got 1, as expected.

The instance count should remain equal to the number of CreateNamedPipe() calls you've made
for a given name until you've closed the handle to the pipe instance.

This may not be useful to you.

What do you need to wait for before exiting your process ? Are you waiting for all clients
to disconnect?

Mark

"Go that way, really fast. If something gets in your way, turn."

Re: Namedpipe [modified]

charian092025-Jun-07 23:42

charian0920

25-Jun-07 23:42

I need to wait for all the namedpipe instance to be disconnected by the server first before my process exit.

I tried again the code, I already getting "1" for the instance count.
If the server already called the DisconnectNamedPipe(), shouldn't be the number of instance decreased?

thanks again Smile | :)

-- modified at 10:09 Tuesday 26th June, 2007

nathan74-Jun-07 17:24

4-Jun-07 17:24

how to disable collapsing a tree item? using CTreeCtrl, thanks!

Naveen4-Jun-07 17:37

4-Jun-07 17:37

Handle the TVN_ITEMEXPANDING notification and set *pResult = 1;

nave

[OpenedFileFinder]

nathan74-Jun-07 18:26

4-Jun-07 18:26

hi, thanks but i meant the user should not be able to COLLAPSE the item, i changed the double click and keydown event, it works!

nathan74-Jun-07 18:34

4-Jun-07 18:34

void AceAuditMainDialog::OnTvnKeydownMainTree(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMTVKEYDOWN pTVKeyDown = reinterpret_cast<lpnmtvkeydown>(pNMHDR);
// TODO: Add your control notification handler code here

if ( pTVKeyDown->wVKey == VK_LEFT )
{
// ???
}
*pResult = 0;
}

what should i do inside the if? i want the program do nothing, not to collapse the tree item

Naveen4-Jun-07 19:03

4-Jun-07 19:03

I dont suggest you to handle the key down event to prevent the item from collapsing. As i previously said, overide the TVN_ITEMEXPANDING and handle the collapsing there

void MYDlg::OnItemexpandingTree1(NMHDR* pNMHDR, LRESULT* pResult) <br />
{<br />
	NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;<br />
        if( items is already expanded)<br />
        {<br />
            // this event is to collapse it so prevent it <br />
	    *pResult = 1;<br />
        }<br />
        else<br />
        {<br />
	    *pResult = 0;<br />
        }<br />
}

nave

[OpenedFileFinder]

Naveen4-Jun-07 18:39

4-Jun-07 18:39

nathan7 wrote:
but i meant the user should not be able to COLLAPSE the item

Thats what I meant also. If you set that value as 1, that nodes will no longer able to collapse.

nathan7 wrote:
i changed the double click and keydown event, it works!

What all keys you handled? Did u try pressing -( minus ) in the node?I doubt there are more keys like this. So you have to handle all that..

nave

[OpenedFileFinder]

nathan74-Jun-07 19:15

4-Jun-07 19:15

but if i do as u said, i can't expand the tree

Naveen4-Jun-07 19:26

4-Jun-07 19:26

I have posted the code here[^]. Did you notice that if condition? You can get whether an item is laready expanded or not using the GetItemState() function.

nave

[OpenedFileFinder]

nathan74-Jun-07 19:53

how to set font color of a single tree item?

4-Jun-07 19:53

sorry i didn't see ur code carefully, thanks i understand now~~

nathan74-Jun-07 17:17

Re: how to set font color of a single tree item?

4-Jun-07 17:17

use CTreeCtrl, how to set the font color of a single tree item? other item's font color is not changed

nathan

Naveen4-Jun-07 17:34

Re: how to set font color of a single tree item?

4-Jun-07 17:34

You have to handle the NM_CUSTOMDRAW, notification if you want to do this.

nave

[OpenedFileFinder]

Hamid_RT4-Jun-07 20:39

Hamid_RT

4-Jun-07 20:39

See an example CTreeCtrlEx - Setting color and font attribute for individual items in tree control[^]

WhiteSky

Consume a Web Service via C++

rluckwell4-Jun-07 14:39

rluckwell

4-Jun-07 14:39

I am trying to consume a web service via a dll, I just want to pass in a variable length string that can be up to 5000 characters long, this string is is then passed directy to the web service. I have followed the example in the MSDN on creating a client that consumes a web service http://msdn2.microsoft.com/en-us/library/2k53kft2(VS.80).aspx which works fine but when I change the web service and calling methods to work with a string I get errors, any help on how I should do would be much appreciated.

also Im very new to C++

This is my DLL function that calls the web method.

extern "C" __declspec (dllexport) int __cdecl EMSWSTools(char *lpCmdLine) <br />
<br />
{<br />
 using namespace std;<br />
 int ret = 0;<br />
  <br />
 EMSSupTools::CEMSSupTools ws; <br />
<br />
 <br />
 HRESULT hr = ws.EMSHelper(lpCmdLine, &ret);<br />
 if (SUCCEEDED(hr))<br />
  return(ret);<br />
    else<br />
  return(0);<br />
}

Re: Consume a Web Service via C++

prasad_som4-Jun-07 19:58

prasad_som

4-Jun-07 19:58

rluckwell wrote:
I get errors,

What types of errors are these ?

Add web reference for it again, deleting previous one.
Probably, proxy class and namespace added will be of difference name.

Prasad
MS MVP - VC++

Re: Consume a Web Service via C++

rluckwell5-Jun-07 13:21

rluckwell

5-Jun-07 13:21

The error is an AccessViolationException: - Attempted to read or write protected memory. this is often an indication the other memory is corrupt.

I have tried to re add the web reference. I have another web method the just returns an integer which works. I have also setup the test harness in VB that calls the web methods directly and this works fine to.

CFile to read binary file

gurucplusplus4-Jun-07 13:10

gurucplusplus

4-Jun-07 13:10

Does CFile::Read take a binary file?

Re: CFile to read binary file

Naveen4-Jun-07 14:03