How to code DLL events in dynamics ax 2012 r3 ?

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Posted on by SA-05060738-0

Hello,

we work with Microsoft Dynamics Ax 212 R3 (CU12) and we need to access to the DLL events for our telephony system.

The file is in the client bin folder and is imported in the references.

I don't know how to call these events in x++ (in c# examples we can see delegate methods).

All basics properties are ok, we can make a call, we can transfer a call too but we cannot implement the alerting call, the agent status, the incoming call ...

We can't use managed_host principles because no control is return by the DLL.

All my research and my tests are ko.

Can anyone help us ?

Thanks in advance.

Stéphane A.

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Martin Dráb 237,758 Most Valuable Professional on at

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You mentioned you wanted to call those events from X++, but I think you mean subscribing to those events, i.e. registering your X++ methods as handlers of the events. Is it so?

I don't remember if it's possible in AX 2012, but if so, you should utilize += eventhandler(...). If it's not possible, you should handle events in .NET code and call AX methods from there.

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SA-05060738-0 14 on at

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Hello Martin,

yes that's it. Sorry for my poor English.

I don't know how to subscribe to these events.

I read full of posts you made on it but didn't find any answer i can use.

If i didn't make mistake in my code, i tried += eventhandler() with no success because i don't understand how to get the link between the dll and x++ for the events.

I'm going to try to explain what i mean :

c# is coded like this :

ctiObj = new CtiServerConnector.Control();

ctiObj.CstaAlertingEvent += new CtiServerConnector.Events.CstaAlerting(ctiObj_CstaAlerting_Event);

With :

public delegate void CstaAlerting(string agentNum, string refCom, string caller, string called, string clientCode, string callerStr, string calledStr);

void ctiObj_CstaAlerting_Event(string agentNum, string refCom, string caller, string called, string clientCode, string callerStr, string calledStr)
{
refComAlerting = refCom;
myDebug("\r\nCstaAlerting : Agent=" + agentNum + " ref=" + refCom +

" caller : " + caller + " called : " + called + " clientCode : " + clientCode +

" callerStr : " + callerStr + " calledStr : " + calledStr);
}

I don't know how to get the same thing in x++ because of the CtiServerConnector.Events which has no accessible code.

Maybe have you an idea ?

Thanks a lot for your help

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Martin Dráb 237,758 Most Valuable Professional on at

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Maybe you should first learn how to subscribe X++ methods to X++ delegates before complicating it by involving .NET Interop.

You'll see that you need to create a method with the same signature as the delegate and use +=eventhandler() to register the handler. For example:

// Static handler objectA.myDelegate += eventhandler(MyClass::staticHandler); // Instance handleer objectA.myDelegate += eventhandler(myObject.instanceHandler);

When you're comfortable with that, try subscribing to the managed event:

ctiObj = new CtiServerConnector.Control(); ctiObj.CstaAlertingEvent += eventhandler(myObject.ctiObj_CstaAlerting_Event);

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SA-05060738-0 14 on at

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I already have created the delegate method and the static handler like this :

In a class named Bij_CTI2024

delegate void CstaAlertingEventDelegate(str agentNum, str refCom, str caller, str called, str clientCode, str callerStr, str calledStr)
{
}

public static void on_CstaAlertingEvent(str agentNum, str refCom, str caller, str called, str clientCode, str callerStr, str calledStr)
{
info(strFmt("\r\nCstaAlerting : Agent=%1 ref=%2 caller : %3 called : %4 clientCode : %5 callerStr : %6 calledStr : %7",
agentNum,
refCom,
caller,
called,
clientCode,
callerStr,
calledStr));
}

In a form method Init :

Bij_CTI2024 cti2024 = new Bij_CTI2024();

cti2024.CstaAlertingEventDelegate += eventhandler(Bij_CTI2024::on_CstaAlertingEvent);

Am i right ?

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Martin Dráb 237,758 Most Valuable Professional on at

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Test it (by invoking the delegate) to see if it works or not. It looks good to me, but testing is testing...

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SA-05060738-0 14 on at

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You're right :) i will ...

Best regards

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SA-05060738-0 14 on at

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Hello Martin,

I finally found the time to test the code below.

It works well alone.

Now I face to my first problem : .NET interop

i don't know how to subscribe to the DLL events

ctiobj doesn't have any intellisense on events but only on properties

it's like i have no access to the managed event

I really don't understand how i can do that

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Martin Dráb 237,758 Most Valuable Professional on at

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Don't depend on IntelliSense; write the code and try compiling it. Unfortunately, I don't remember whether it worked in AX 2012. It's quite possible that it isn't supported, but maybe you're lucky.

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SA-05060738-0 14 on at

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Well ... i'm not 😢

i get this error : "Parentheses are required on a method call"

cti.CstaAlertingEvent += eventhandler(Bij_CTI2024::on_CstaAlertingEvent);

I tried a new approach with cti.add_CstaAlertingEvent(ManagedEventHandler val).

First, i deleted the "static" property in my class and then i wrote this in my form:

public void Init()
{
CtiServerConnector.Control cti;

super();

// Init contrôle CTI
cti = new CtiServerConnector.Control();

// Event cti
cti.add_CstaAlertingEvent(new ManagedEventHandler(this,'on_CstaAlertingEvent')); // With on_CstaAlertingEvent as new method in the form
}

this code is compiling right

but in execution Dynamics crashes !

In my research, i saw ManagedEventHandler seems to need "Managed_Host" control.

"Managed_Host" control needs formcontrol type in the DLL Reference (like AxReportViewer in the Microsoft.Dynamics.Ax.Frameworks.Controls)

But what can we do if the Reference has no control ????

I think Dynamics 2012 is not compatible with this DLL.

The only way i see is an ocx ...

Do you think i am right ?

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Verified answer

Martin Dráb 237,758 Most Valuable Professional on at

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I think it compiles just because the compiler doesn't check types there. The code doesn't make sense to me and you indeed found and it can't work.

Maybe it's time to consider again the suggestion at the end of my first reply.

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