How to add a filed to the UI which does not exist in current View

Hi @Dipak Nilkanth Thanks for your support, I need to use that field in Condition inside the Assignment map, If I follows the above instructions, will I able to achieve that one also? when extending DAC extension of POLine by adding a unbound field for the ItemClassID, will it appears in Assignment map?

Hi @PDharmasena10,

If you need to use that field in Condition inside the Assignment map, I believe you need to add bound field, So it will be appears in Assignment map as well.

@Dipak Nilkanth I extend the POLine and add two fields, now two fields are visible. 

    public class POLineExt : PXCacheExtension<PX.Objects.PO.POLine>
  {
        #region UsrInventoryItemClassID

    [PXInt]
    [PXUIField(DisplayName="ItemClass")]
    [PXDBScalar(typeof(
        Search<InventoryItem.itemClassID,
        Where<InventoryItem.inventoryID, Equal<POLine.inventoryID>>>))]
    public virtual int? UsrInventoryItemClassID { get; set; }
    public abstract class usrInventoryItemClassID : PX.Data.BQL.BqlInt.Field<usrInventoryItemClassID> { }
        #endregion

        #region UsrInventoryItemClassCD

    [PXString(32)]
    [PXUIField(DisplayName="Item Class Description")]
    [PXDBScalar(typeof(
        Search2<INItemClass.itemClassCD,
            InnerJoin<InventoryItem, On<InventoryItem.itemClassID, Equal<INItemClass.itemClassID>>>,
        Where<InventoryItem.inventoryID, Equal<POLine.inventoryID>>>))]
        public virtual string UsrInventoryItemClassCD { get; set; }
    public abstract class usrInventoryItemClassCD : PX.Data.BQL.BqlString.Field<usrInventoryItemClassCD> { }
    #endregion
  }
}

When I select a value for the inventory item, I need to auto fill the values for item class and item class description. to do that I wrote following event, but it is not work properly, after save and reload the full website, it displays values for these fields

    public class POOrderEntry_Extension : PXGraphExtension<PX.Objects.PO.POOrderEntry>
    {
        #region Event Handlers

        protected void POLine_InventoryID_FieldUpdated(PXCache cache, PXFieldUpdatedEventArgs e)
        {

            //Base.Transactions.Cache.Clear();
            //Base.Transactions.Cache.ClearQueryCache();
            Base.Transactions.View.RequestRefresh();

            var tranView = Base.Transactions.Current.GetExtension<POLineExt>();

            cache.SetValueExt<POLineExt.usrInventoryItemClassID>(e.Row, 4);
            //cache.SetValueExt<POLineExt.usrInventoryItemClassCD>(e.Row, "JAM");

    }

        #endregion
    }

How to write an event to refresh the UI correctly?

Hi @PDharmasena10,

Could you please try below code snippet?

protected void POLine_InventoryID_FieldUpdated(PXCache cache, PXFieldUpdatedEventArgs e)
{
    if (e.Row == null) return;

    var row = (POLine)e.Row;
    var tranView = row.GetExtension<POLinfeExt>();


    cache.SetValueExt<POLineExt.usrInventoryItemClassID>(row, tranView.usrInventoryItemClassID);

    cache.Update(row);

}

@Dipak Nilkanth HI, 

            if (e.Row == null) return;
            var row = (POLine)e.Row;
            var tranView = row.GetExtension<POLineExt>();
            cache.SetValueExt<POLineExt.usrInventoryItemClassID>(row, tranView.UsrInventoryItemClassID);
            cache.Update(row);

I did it but didn’t works

Making a database call in the RowSelected event handler is really bad for performance and greatly discouraged by Acumatica.