Hi @mrthanhkhoi  Below link will explain you to make the required field on conditional basis.

Please review and let me know if you have any queries.

https://stackoverflow.com/questions/56008962/i-need-to-conditionally-set-a-field-to-be-required 

Hi @Naveen Boga, thanks for your link but I can’t resolve the issue.

I tried to create an event handler:

protected void SOOrder_RowSelected(PXCache cache, PXRowSelectedEventArgs e)
        {

          var row = (SOOrder)e.Row;
          if(row!=null)
            {

              var isVisible = true; // somehow get visible of SOOrder.salesPersonID
              PXUIFieldAttribute.SetRequired<SOOrder.salesPersonID>(cache, row, isVisible);
            }

        }

but I get error: 

error CS1501: No overload for method 'SetRequired' takes 3 arguments

Do you have any idea?

@mrthanhkhoi  Please check with the below code.

rotected void SOOrder_RowSelected(PXCache cache, PXRowSelectedEventArgs e)
        {

          var row = (SOOrder)e.Row;
          if(row!=null)
            {

              var isVisible = true; // somehow get visible of SOOrder.salesPersonID
              PXUIFieldAttribute.SetRequired<SOOrder.salesPersonID>(cache,  isVisible);
            }

        }

Hi @Naveen Boga,

Thank you for your suggestion.

By the way, Do you know how to get visibility of field SOOrder.salesPersonID?

I mean I want to get the visibility of field SOOrder.salesPersonID (it is shown on screen or not) then set required to yes/no corresponding.

Hi @mrthanhkhoi  The Sales Person ID field will be available in the “Commissions” tab.

Please find the screenshot for reference.

Hi @Naveen Boga

thank you for your response.

Do you have any idea why implementing event handler in .dll file does not affected?

@mrthanhkhoi  It will affect the event handlers code for sure if this is part of .DLL.

And, make sure that this field should be property as CommitChanges =true