Acumatica Modern UI – RowSelected Event Not Triggering When Adding a New Row

Hi ​@jchawda80 ,

This is a known behavioral difference between Classic UI and Modern UI in Acumatica. The root cause lies in how Modern UI handles new row initialization differently from Classic UI.

Why This Happens

In Classic UI, adding a new row triggers a full roundtrip to the server, which fires the complete event chain including RowSelected.

In Modern UI, new row creation is handled client-side first (optimistic rendering), so the server-side RowSelected event is not immediately fired after clicking "Add Row". The event fires later in the lifecycle — typically only when the user interacts with the row (e.g., selects a field) or saves.

Recommended Fixes

Use RowInserting or RowInserted Instead

These events are reliably triggered in both UIs when a new row is being created:

protected void MyDAC_RowInserting(PXCache cache, PXRowInsertingEventArgs e)

{

MyDAC row = (MyDAC)e.Row;

if (row == null) return;

// Initialize defaults or apply business logic here

}

protected void MyDAC_RowInserted(PXCache cache, PXRowInsertedEventArgs e)

{

MyDAC row = (MyDAC)e.Row;

if (row == null) return;

// Logic after row is fully inserted

}

Hope above helps!!