enabling /disabling buttons on form

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Posted on by Mav

Hi Experts,

I have a form namely salestable in which i have a custom button .

Created event handler class & added onActivated event for salestable datasource of this form (1st code box)

The logic works fine to enable/disable button, only 1 issue that when you create a new SO and add salesline the button does not enable itself until & unless you refresh the form.

Any idea what could be done in x to fix this issue, i.e. the button is enabled as soon as new salesline item is added .

Do i need to write code for event onValidateWrite at salesine datasource for salestableform , if yes what should i write.

[FormDataSourceEventHandler(formDataSourceStr(SalesTable, SalesTable), FormDataSourceEventType::Activated), 
        SuppressBPWarning('BPParameterNotUsed', 'Parameter e not used')]
    public static void salesTable_OnActivated(FormDataSource sender, FormDataSourceEventArgs e)
    {
        FormControl     myFormControl    = sender.formRun().design().controlName(formControlStr(SalesTable, MyCustomButton));
        SalesTable      salesTable                = sender.cursor();
       

        if(SalesLine::exist(salesTable.salesid) && salesTable.SalesStatus == SalesStatus::Backorder) 
        {
            myFormControl.enabled(true);
        }
        else
        {
            myFormControl.enabled(false);
        }
  
    }

Thanks

Mav

Thanks

Mav

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Verified answer

Martin Dráb 237,953 Most Valuable Professional on at

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You should do it when a line is created, i.e. in write() (or a corresponding event).

validateWrite() isn't the right place, because it might be called multiple times before a line is actually saved (or maybe it will never be saved).

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Verified answer

nmaenpaa 101,160 Moderator on at

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Your condition enables the button only if there is at least one SalesLine in the database, and SalesStatus is BackOrder.

So, it will only be enabled once the line has been saved and form is refreshed.

You can add similar code to the write() method / event of the SalesLine data source. Don't put your code to validateWrite method if it has nothing to do with validating the record.

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Mav on at

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Ok so no validatewrite event handler, i got that. Now i only have the above code in activate event & issue is the user does not want to refresh the form to see if button is enabled , can you please share where & how to refresh the form within the code.

Thanks

Mav

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Suggested answer

nmaenpaa 101,160 Moderator on at

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Please read my previous reply again, it contains information that will help you forward.

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Mav on at

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Sorry about this, yes it works after adding similar active handler code to write method.

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