Serial Port Communication - C / C++ / MFC Discussion Boards

vikramlinux24-Jun-03 1:31

24-Jun-03 1:31

Ya.. I got it..that is really nice soln. Now I want to pass a safearray of strings to that C# DLL. how to do this? Frown | :(

Re: C# DLL and MFC app

Kannan Kalyanaraman24-Jun-03 1:52

Kannan Kalyanaraman

24-Jun-03 1:52

I think you need to change your mail id for the ms programs to work Smile | :)

, okay just kidding.
I have never tried this, but start looking into
MarshalAsAttribute.SafeArraySubType or UnmanagedType.SafeArray
as function parameters in c#

Cheers,
Kannan

Re: C# DLL and MFC app

vikramlinux24-Jun-03 1:56

vikramlinux

24-Jun-03 1:56

Thank you..MarshalAsAttribute.SafeArraySubType works nicely.Anyway I love linux and windows both Smile | :)

Vikram

Re: C# DLL and MFC app

Kannan Kalyanaraman24-Jun-03 2:07

Kannan Kalyanaraman

24-Jun-03 2:07

vikrams wrote:
Anyway I love linux and windows both

Smile | :)

Cheers,
Kannan

Thread

BengCésar23-Jun-03 23:54

BengCésar

23-Jun-03 23:54

I use a thread like
http://www.codeproject.com/useritems/memberthread.asp?target=threadstruct
and I want it begins automatically after the display of the dialog Box

Where I have to place AfxBeginThread(...) ?

Excuse my poor english, I'm antartician

My uncle is a swindler and then?

Re: Thread

Rage24-Jun-03 1:06

Rage

24-Jun-03 1:06

Caïra wrote:
and I want it begins automatically after the display of the dialog Box

Where I have to place AfxBeginThread(...) ?

Right before the dialog box call (so before AfxMessageBox in this case).

~RaGE();

Re: Thread

Jonathan Craig24-Jun-03 5:15

Jonathan Craig

24-Jun-03 5:15

Set the dwCreateFlags parameter to CREATE_SUSPENDED.

CWinThread* pThread = AfxBeginThread(pfnThreadProc, pParam, THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED);

When you are ready for the thread to start execution call this:

pThread->ResumeThread();

Smile | :)

Jonathan Craig
www.mcw-tech.com

Serial Port Communication

DeepakSharma23-Jun-03 23:44

DeepakSharma

23-Jun-03 23:44

Hi friends,

i have an application which takes some inputs from a [B]SERIAL PORT RS232[/B] , so for using that application which is installed on some other system i need to desgin a mediator which will send command to that aaplication through my [B]SERAIL PORT[/B] so friend s please provide me some help how to start with such module which interacts with Serial port.

Also i have one query if i install both software my [B]HOST(WHICH PUSH COMMANDS TO CONTROL SYSTEM)[/B] AND [B]CONTROL SYSTEM(WHICH ACCEPTS COMMANDS AND SENDS BACK ACKNOWLEDGEMENT TO HOST)[/B] then will they be able to interact fine or i need to install them on diffrent machine and connect them through SERAIL CABLE.

waiting for a reply

deepak

Re: Serial Port Communication

Ted Ferenc24-Jun-03 4:57

Ted Ferenc

24-Jun-03 4:57

The simplest method is use

<code>hPort = CreateFile ("COM1",
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
0,
NULL);</code>

Look in the MSDN for "Programming Serial Connections", this should be OK unless you need something more advanced, but I don't think you do.

<HR SIZE=1 /HR>
<i>If I have seen further it is by standing on the shoulders of Giants.</i> - Isaac Newton 1676

Re: Serial Port Communication

DeepakSharma24-Jun-03 19:22

DeepakSharma

24-Jun-03 19:22

Thanks Ted,

I have written code, there is no problem in this.Now the problem is that i have my applictaion will talk to another application which is on another machine.Both machine are connected by NULL MODEM SERIAL RS232 cable.So i need to write and read from my COM port.So i have to desgin my program in such a way that whwenver any data comes from another machine to my port i raed it and similteanosly i can also write to it for the second application.

Hope u will help me

Deepak

https authentication

Tarundeep Singh Kalra23-Jun-03 23:43

Tarundeep Singh Kalra

23-Jun-03 23:43

hi all,
i want to do https authentication programatically , i mean without the use of browser.
is there any way to do.
any libraries.
TIA
regards
tarun

Re: https authentication

Ryan Binns24-Jun-03 1:09

Ryan Binns

24-Jun-03 1:09

Try the OpenSSL library (www.openssl.org[^]). It's complex, but so is SSL. It's probably the best SSL library around.

Ryan

Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2^nd April 2003, The Lounge)

Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

Re: https authentication

Tarundeep Singh Kalra24-Jun-03 3:03

Tarundeep Singh Kalra

24-Jun-03 3:03

thanks a lot for pointer
-regards
tarun

Re: https authentication

Ryan Binns24-Jun-03 3:06

Ryan Binns

24-Jun-03 3:06

You're welcome Smile | :)

Ryan

Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2^nd April 2003, The Lounge)

Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

adding a list control to a string

si_6923-Jun-03 23:40

si_69

23-Jun-03 23:40

Hi There

i have a list control which contains a list of numbers
i want to loop through each item and add them to a CString

so my CSTring would = "45466,4554,767567,88674,34535,66654,66565"

ive got as far as loop through the List Ctrl but i dont know how to
create the string, by appending each item

any1 ne ideas

thanks

simon

void CSelectStudents::CreateGroupList(void)
{
for (int f=0; f< m_studentlist.GetItemCount(); f++)
{
CString stud_id = m_studentlist.GetItemText(f,3);
}
}

Re: adding a list control to a string

vikramlinux24-Jun-03 0:39

vikramlinux

24-Jun-03 0:39

you may use somthing like this

CString stud_id +=

Re: adding a list control to a string

Rage24-Jun-03 1:28

Rage

24-Jun-03 1:28

si_69 wrote:

void CSelectStudents::CreateGroupList(void)
{
   CString stud_id;
   stud_id.Empty();
   for (int f=0; f< m_studentlist.GetItemCount(); f++)
   {
      stud_id += m_studentlist.GetItemText(f,3);
   }
}

~RaGE();

Re: adding a list control to a string

RobJones24-Jun-03 1:32

RobJones

24-Jun-03 1:32

Like the previous post said.. use +=

You have to declare your string before the loop..

void CSelectStudents::CreateGroupList(void)
{
	CString stud_id;

	for (int f=0; f< m_studentlist.GetItemCount(); f++)
	{
		stud_id += m_studentlist.GetItemText(f,3);
	}
}

Whoever said nothing's impossible never tried slamming a revolving door!

How to store data?Advice needed!!

Svin23-Jun-03 23:24

Svin

23-Jun-03 23:24

I need to store data(large amount of classes(all classes derived from 1). The program must work under clear Windows(without Ofiice etc.). I can only read previous data and add data. How can i realize it? Confused | :confused:

//Sorry for my English

Re: How to store data?Advice needed!!

Andrew Walker24-Jun-03 0:09

Andrew Walker

24-Jun-03 0:09

The answer is that it depends on what data that you need to store (it's much simpler if it's just Plain Old Data), and what platform you are using. Under .NET serialization support is provided, at least to a certain extent.

A good serialization primer: C++ FAQ Lite: Serialization[^]

If you can keep you head when all about you
Are losing theirs and blaming it on you;
If you can dream - and not make dreams your master;
If you can think - and not make thoughts you aim;
Yours is the Earth and everything that's in it.

Rudyard Kipling

Re: How to store data?Advice needed!!

Svin24-Jun-03 0:31

Svin

24-Jun-03 0:31

Thx. for example. I've already thought about it. But if i need to get only a part of data. Is it possible in Serialization?

I use VC++6.0.

Re: How to store data?Advice needed!!

Andrew Walker24-Jun-03 3:08

Andrew Walker

24-Jun-03 3:08

Svin wrote:
But if i need to get only a part of data. Is it possible in Serialization?

It is possible, all you have to do is only serialize the members which you require when you need to reload the objects.

Sometimes you may not even need to reload the data into an object of the same type, you might just load into a temporary structure. This also has the benefit of keeping messy serialization code away from your original classes and prevents problems of public members or lots of messy pointers to functions.

There of heaps of good examples out there on how to start serialization, my advice is to think simple, (your own format, preferrably text based to make debugging easy) which is as simple to read and write as possible - but try to allow for room to replace a simple system with something more complex if your project is going to grow (maybe XML?)

How to specify a series of data for a char array

FlyingDancer23-Jun-03 22:52

FlyingDancer

23-Jun-03 22:52

Now I meet a problem
I don't know how to specify a series of data for a char array. Blush | :O

char A[5];
Its initial value is a value of "abcd"

How to solve this problem?
Thank you in advance!

Re: How to specify a series of data for a char array

FlyingDancer23-Jun-03 22:55

FlyingDancer

23-Jun-03 22:55

char A[5]
sprintf(A,"abcd");
Now I bring to mind.
Poke tongue | ;-P

Re: How to specify a series of data for a char array

RChin23-Jun-03 23:12

RChin

23-Jun-03 23:12

or you can always do:

<code>
char A[] = _T("ABCD")
</code>

If you know the contents on declaration.This way you don't need to worry about the string fitting the array size. Its automatically sized for you.

"..Even my comments have bugs!"

Inspired by Toni78

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