Form method event handler problem

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Posted on by Darrell Crews

Hello Community,

I'm struggling with a form method event handler and was hoping to get some advice.

Form method VendEditInvoice.setLineFields() turns some fields non-editable and I need to change that.

This is my approach, but i'm getting the error below :

[PostHandlerFor(formStr(VendEditInvoice), formMethodStr(VendEditInvoice, setLineFields))]
public static void VendEditInvoice_SetLineFields_Post(XppPrePostArgs args)
{
FormRun form = args.getThis();

FormStringControl scPurchParmLineItemId = form.design().controlName(formControlStr(VendEditInvoice, PurchParmLine_ItemId));

scPurchParmLineItemId.allowEdit(true);

}

Error : The instance method designated by argument does not exist

The method does exist, but for some reason it does not seem to qualify as a instance method although it is not static.

Any idea how to get this to work or a work around to achieve the goal ?

Thanks

Darrell

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nmaenpaa 101,166 Moderator on at

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The method is not part of the form, it's part of the form data source which is a separate class.

There's not method called setLineFields in the form itself. You will notice the difference if you try to create event handler for a data source event (by right click menu).

I'm not sure if you can create event handlers for form data source methods. At least the right click menu in form designer doesn't allow it.

I recommend you to try Chain of Command instead.

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Darrell Crews 55 on at

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Thanks, I tried CoC already and got the error 'setLineFields is not a chain of command method'.

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nmaenpaa 101,166 Moderator on at

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Hi Darrell,

any chance you could share that CoC code?

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nmaenpaa 101,166 Moderator on at

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By the way, since setLineFields method is called from active method of the data source, you could use CoC or event handler to run your code after the standard active method.

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Darrell Crews 55 on at

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I tried this (setLineFields is not a CoC method)

[ExtensionOf(classStr(VendEditInvoice)]

final class VendEditInvoice_Extension

{

public void setLineFields()

{

next setLineFields();

vendInvoiceInfoLine_ds.object(fieldNum(VendInvoiceInfoLine, ItemId)).allowEdit(true);

}

}

and then this (vendInvoiceInfoLine_ds not in scope)

[ExtensionOf(formDataSourceStr(VendEditInvoice, VendInvoiceInfoLine))]

final class VendEditInvoice_Extension

{

public void setLineFields()

{

next setLineFields();

vendInvoiceInfoLine_ds.object(fieldNum(VendInvoiceInfoLine, ItemId)).allowEdit(true);

}

}

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nmaenpaa 101,166 Moderator on at

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Instead of vendInvoiceInfoLine_ds you should be able to access the ds with "this" (since you are augmenting the data source class).

Anyway plan b would be to run your code after active method of the ds.

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Frank Bruemmer 354 on at

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Darrell,

this should do it. This.object(..) should get you any form control :

[ExtensionOf(formDataSourceStr(VendEditInvoice, VendInvoiceInfoLine))]

final class VendInvoiceInfoLineForm_Extension

{

public void setLineFields()

{

next setLineFields();

this.object(fieldNum(VendInvoiceInfoLine, ItemId)).allowEdit(true);

}

}

Best regards

Frank

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