Re: Use .Net library in C++ - C# Discussion Boards

12-Oct-06 21:56

try to add an existing file option in VS 2005

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Use .Net library in C++

Ward12-Oct-06 20:13

12-Oct-06 20:13

How can I use a .NET dll in a C++ application?

quiteSmart12-Oct-06 20:54

quiteSmart

12-Oct-06 20:54

Just use the C++ in the .NET environment. Install the Visual Studio .Net and use the C++ over three

Smile | :)

jamil abou khalil
MSN: jamilaboukhalil@hotmail.com

Nader Elshehabi13-Oct-06 13:02

Nader Elshehabi

13-Oct-06 13:02

Hello

Sorry! You can't! .Net dlls are managed code. You know you can call unmanaged code by P/Invoke, but not vice versa. If there is a managed code that you want to use, maybe you could make it a service or a commandline console application, then you can communicate with it from your C++ program.

Regards

Ward15-Oct-06 20:40

15-Oct-06 20:40

I've searched some documentation and I was able to do it.
The trick is to register the .Net dll as a COM server.
But to be able to register it as a COM server you must first have a tlb file of it.
This tlb file you can create with the visual studio tool tlbexp.exe.
From the command prompt:

tlbexp dotNET.dll /win32 /out:dotNET.tlb

Once you have the tlb file you can use regasm to register the .Net dll as a COM server. You will not be able to run regasm from the windows command prompt. You must launch the visual studio command prompt to do this.
In the visual studio command prompt type:

regasm dotNET.dll /tlb:dotNET.tlb

From this point you can use the classes and functions of the .Net dll is whatever language that understands COM.

Kind regards,

Setting a form onto a panel.

Nader Elshehabi16-Oct-06 4:09

Nader Elshehabi

16-Oct-06 4:09

Truely I solute you. I really urge you to write an article about it in CodeProject with more details. Many people will miss this old post. I've allowed myself to bookmark this post for future referal. Really brilliant.

Regards

JacquesDP12-Oct-06 20:12

12-Oct-06 20:12

Hi all.
I have the following. A form with a splitcontainer, ie.. panel1 left & panel2 right. On the left panel I have a treeview, as the user selects an item from the treeview I want to display the appropriate form onto the right hand panel.

I tried the following, it compiles but fails at runtime.

splitcontainer.panel2.Containers.Add(new frmToDisplay);

Any help will be appreciated, thanx

He who laughs last is a bit on the slow side

AB777112-Oct-06 20:38

12-Oct-06 20:38

try this
objfrm = new frmToDisplay();
objfrm.Parent = splitcontainer.panel2;
objfrm.show();

or

splitcontainer.panel2.Controls.Add(new frmToDisplay);

Hope that works fine for u

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

JacquesDP12-Oct-06 21:11

12-Oct-06 21:11

Thanx for the quick reply.

Both examples compiles fine but I recieve the following error at runtime.

"Top level control can not be added to a control."

Not sure what it means or how to make the panel top level control D'Oh! | :doh:

He who laughs last is a bit on the slow side

AB777112-Oct-06 21:52

12-Oct-06 21:52

Dont use the second one
Tyr the first option

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Andrei Ungureanu12-Oct-06 21:17

Andrei Ungureanu

12-Oct-06 21:17

Hi,
Try converting your form to a UserControl. It works better.

Do your best to be the best

JacquesDP12-Oct-06 21:38

12-Oct-06 21:38

Not sure if I did it the right way, tried it via casting. ie

Form form1 = new Form();
UserControl uctrl = new UserControl();
uctrl = (UserControl)form1;

But compilation fialed and I recieve the error - Cannot Convert Form to UserControl

He who laughs last is a bit on the slow side

AB777112-Oct-06 21:52

12-Oct-06 21:52

to convert the form to usercontrol
just change the class derivation from Forms to UserControl.

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

JacquesDP12-Oct-06 22:07

12-Oct-06 22:07

Just to make sure I understand this correctly. You mean...

I must change the folloeing within the form that I try to load into the panel?? Confused | :confused:

public class frmReportPrintSettings : System.Windows.Forms.Form

Change to

public class frmReportPrintSettings : System.Windows.Forms.UserControl

He who laughs last is a bit on the slow side

AB777112-Oct-06 22:30

12-Oct-06 22:30

Yesssssss....

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

darkelv12-Oct-06 23:16

darkelv

12-Oct-06 23:16

form is your form to be put in panel.

if(form != null)
{
form.ControlBox = false;
form.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
form.Dock = DockStyle.Fill;
form.MaximizeBox = false;
form.MinimizeBox = false;
form.TopLevel = false;
panelTop.Controls.Add(form);
form.Show();
form.BringToFront();
}
else
{
panelTop.Controls.Clear();
}

JacquesDP12-Oct-06 23:49

how to find registry of com coponents

12-Oct-06 23:49

Thanks, works 100, exactly what I wanted to do. Big Grin | :-D

He who laughs last is a bit on the slow side

vinay_inavolu12-Oct-06 19:46

vinay_inavolu

12-Oct-06 19:46

Hai

i want to verify the com components which i am referencing are resgistered or not and if not they needs to be registered in a particular folder

Can i know the way

mav.northwind12-Oct-06 20:02

mav.northwind

12-Oct-06 20:02

Hi!
A simple way would be to try to instantiate the COM object you intend to use. If this throws a COMException, the component usually simply isn't registered (yet).
But there is no way you can find out which folder a component has to be registered from, that completely depends on the component you want to use.

Regards,
mav

--
Black holes are the places where God divided by 0...

vinay_inavolu12-Oct-06 20:29

vinay_inavolu

12-Oct-06 20:29

When client deploys the application and Com components are not registered it throws the exception.

so that needs to checked and added as users wont have knowledge on registering the dlls.

mav.northwind13-Oct-06 0:48

mav.northwind

13-Oct-06 0:48

Yes, if the components are not registered correctly, the exception I've mentioned will occurr.
But, as with all exceptions, you can catch them ("that needs to checked") and then register the dlls yourself (using Process.Start("regsvr32 -s comdll.dll");) if you know where they're located.

Regards,
mav

--
Black holes are the places where God divided by 0...