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I open the form "DirPartyTable" from User interface :
when I open it in visual studio I don't find the buton "merge Record " But When I open dirPartyTable.Extension I find it
I dont know how this button is displayed in UI?
Have you any idea about the relation between the form and its extension?
the system generates the actual form from the form definition and all form extension definitions in runtime. The relation is that in AOT you will find Form extensions, and all form extensions for DirPartyTable are applied to the DirPartyTable in runtime.
how these extensions are applied to DirPartyTable in runtime.
I want to know how the new controls in extension forms are displayed in DirPartyTable?
How that exactly happens is hidden from us and happens in D365 platform / runtime. What kind of information would you like to know? What is your business requirement?
I want to know how its works because I want to get the new controls created in form extension?
If you create event handler or Chain of Command on this form, you can access any control using this.design().controlname("controlname").
Nikolaos is correct. In fact, what you experienced it the basic idea of having extensions in Dynamics 365. Even Microsoft is using extensions in the base product themselves. Not sure yet why it is done for this button.
Why did you mark the other buttons as well in your screenshot?
also the group "new " doesn't exist in the standard form
New, Edit and Delete buttons are not part of the Design. They are provided by the form framework, and are shown in some scenarios.
You can control the visibility of the buttons with properties ShowNewButton and ShowDeleteButton. But the buttons are really clickable only if the user has a privilege that has corresponding access (Create/Update/Delete) to the display menu item that opens the form.
They are in different model.
Added in the extension.
you means that : for example I set the property ShowNewButton of New button to yes and the user has a privilege Create?
If the user has Create privilege, the button is shown as long as the property ShowNewButton is Auto or Yes. Normally you would leave it to Auto and only change it if you want to hide the button for some reason.
Okay thanks Nikolaos.
@Blue Wang, Yes I see that they are in different model. I want to get the element customized
As mentioned by Nikolaos, the New, Edit and Delete buttons (actually there are quite a few more) are not included in the design. They are created at runtime. The class that creates them is named SysSystemDefinedButtons. Specifically on the new button, line 1376 creates it and line 1397 does some checking on whether it should be created.
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