Table - Method / Events in d365fo

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Posted on by @rp@n

Hi team,

I have little confusion between Application Explorer -- Table - Methods & Events

For example - Cust Table- ModifiedField

PIC 1 -Method -

Pic 2 Events -

OnModifiedField - (Post Event)

OnModifyingField - (Pre Event)

Kindly let me know is both (Pic1 & Pic2) are same? Only the approaches are different?

If required, Shall I use anyone of them?

Please give me more shed on this.

thanks!

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Bharani Preetham Pe... 3,634 Moderator on at

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Here to write/use a method in code we basically have 2 approaches. One by event handlers and two by coc.

Both the ways will give you same result. But based on their framework the capability varies. Like for example in coc you can extend protected method write some custom code or call a new method. For eventhandlers, they cannot access protected methods. The way we write pre coc and post coc, similarly eventhandlers.

But in code execution the coc override the event handlers. Means first the event handler then coc will execute.

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GirishS 27,827 Moderator on at

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Hi,

Both works similarly. But the second one is mainly used for the custom methods where you want to override the post and pre-event handler method.

For example, let's say from the screenshot we have standard method birthdate - We need to customize this method - In that case you can go for Pic 1 where you can write pre and post event handlers.

Pic 2 will be mainly for in Built standard override methods where Microsoft has already provided event handler like onModifiedField and On Modifying field which is similar to post and pre-event handler.

Thanks,

Girish S.

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@rp@n 30 on at

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Thanks Bharani,

What I understand, If I used Event Handlers or Pre CoC/ Post CoC both are return the same result.

The only thing is

With use of Event handlers, we can not use Protected method, Only Private and Public method can use.

With CoC (Pre CoC/ Post CoC), we can use Public, Private and Protected method .

Am I right?

Please give me more shed on this.

thanks!

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Mohit Rampal 12,565 Moderator on at

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Hi, I think its basically about placement of your code in a method. Sequence is Pre-Event Handlers are called first, then particular method will be executed. Before call to super, Pre Events are called, after super Post Events are called and in last Post Event Handlers

Pre-Insert (Pre-Event Handler)

OnInserting (Pre-Event)

super ()

OnInserted (Post-Event)

Post-Insert (Post-Event Handler)

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Bharani Preetham Pe... 3,634 Moderator on at

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No it's wrong. Private method can be accessed only from that class not from extension like coc or event handler.

Event handler supports public method and coc supports both public and protected methods.

Also you can try the same thing in vs so that you can get clear understanding.

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@rp@n 30 on at

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Thanks Bharani

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GirishS 27,827 Moderator on at

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Event handlers supports public method, but Private and protected methods can also be accessed from event handlers if there is a hookable attribute is set to true on that method identifier.

[Hookable(true}] private void methodName() { }

Since the methodName has hookable attribute set to true you can write event handler for that method.

Thanks,

Girish S.

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@rp@n 30 on at

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Thanks Girish for the update

Suppose the hookable is set to false and if required to set hookable to true. then we need to contact MS or we can directly change by myself ?

pls give me more shed on this

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GirishS 27,827 Moderator on at

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No, you cannot change that directly - You need to contact MS.

Thanks,

Girish S.

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Bharani Preetham Pe... 3,634 Moderator on at

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Understood Girish. Thank you.

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