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Call form extension method on datafield event handler

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Posted on by Evisa

Hello everybody,

I have added FieldA on ProjTable table and eventually in the form.

I need to run some logic when the field is modified on the form.

So, I have created MethodA on ProjTable_Form_Extension class and I am trying to call it from the data field event handler.

Below the code:

[FormDataFieldEventHandler(formDataFieldStr(ProjTable, ProjTable, FieldA), FormDataFieldEventType::Modified)]
public static void FieldA_OnModified(FormDataObject sender, FormDataFieldEventArgs e)
{
FormDataSource projTable_ds = sender.datasource() as FormDataSource;
FormRun formRun = sender.datasource().formRun() as FormRun;
ProjTable projTable = projTable_ds.cursor();

formRun.methodA();
}
}

[ExtensionOf(formStr(ProjTable))]
final class ProjTable_Form_Extension
{
public void methodA()
{

//logic here

}

When I modify the field on the form, I get the below error: FormRun object does not have method 'methodA'.

Can anybody help me, please?

Thanks in advance!

All responses (4)

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Waed Ayyad 8,228 Super User 2025 Season 1 on at

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Call form extension method on datafield event handler

Hi,

Is your issue resolved? If yes, mark the answers that helped you as verified.

Thanks
Waed Ayyad
Suggested answer

Waed Ayyad 8,228 Super User 2025 Season 1 on at

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Call form extension method on datafield event handler

Hi,

Is your issue resolved? If yes, mark the answers that helped you as verified.

Thanks
Waed Ayyad
Suggested answer

Waed Ayyad 8,228 Super User 2025 Season 1 on at

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Call form extension method on datafield event handler

Hi,

Use the FormDataSourceField COC and add your method there.

[ExtensionOf(formDataFieldStr(ProjTable, ProjTable, FieldA))] final class XXXProjTable_ProjTableFieldA_Extension { public void modified() { FormDataObject formDataObject = any2Object(this) as FormDataObject; FormDataSource formDataSource = formDataObject.datasource(); next modified(); this.MethodA(); } public void methodA() { //logic here } }

Thanks,

Waed Ayyad

If this helped, please mark it as "Verified" for others facing the same issue
Martin Dráb 232,866 Most Valuable Professional on at

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Call form extension method on datafield event handler

A better approach will be using a CoC extension of the data source and referring the the form by element variable.

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