Customize UDF so it is conditional on SOLine

Question

Hello! I am no expert in C# in customization projects so all my knowledge is based on ChatGPT, which has been super helpful so far.

We have a UDF currently made available on the SOLine on Details tab. It is a string data type and is a drop-down combo box. The goal: this UDF should only be editable when the item on this SO is in a specific item class (CUSTOMNS). If the item is not in this item class, then the field should be locked and not editable.

I have pasted the codes below, open to any suggestions. I am able to publish the project, but with what I have, the field is locked and not editable regardless of the item class. Thanks in advance!

The UDF code is:

[PXMergeAttributes(Method = MergeMethod.Merge)]
[PXStringList(
new string[] { "MCC", "FORMENS", "JTex", "HongKong" },
new string[] { "MCC", "Formens", "JTex", "HongKong" }
)]
[PXUIField(DisplayName = "Factory ID", Enabled = false)]

I also manually added a SOOrderEntry Graph Extension:

using System;
using PX.Data;
using PX.Objects.SO;
using PX.Objects.IN;

namespace PX.Objects.SO
{
  public class SOOrderEntry_Extension : PXGraphExtension<SOOrderEntry>
  {
  protected void _(Events.RowSelected<SOLine> e)
  {
  if (e.Row == null) return;

  var line = (SOLine)e.Row;
  bool editable = IsCustomNSItem(e.Cache, line);

  PXUIFieldAttribute.SetReadOnly<SOLineExt.usrFactoryID>(e.Cache, null, false);
  PXUIFieldAttribute.SetEnabled<SOLineExt.usrFactoryID>(e.Cache, line, editable);
  }

  protected void _(Events.FieldUpdated<SOLine.inventoryID> e)
  {
  if (e.Row == null) return;

  var line = (SOLine)e.Row;
  bool editable = IsCustomNSItem(e.Cache, line);

  PXUIFieldAttribute.SetReadOnly<SOLineExt.usrFactoryID>(e.Cache, null, false);
  PXUIFieldAttribute.SetEnabled<SOLineExt.usrFactoryID>(e.Cache, line, editable);

  if (!editable)
  e.Cache.SetValueExt<SOLineExt.usrFactoryID>(line, null);
  }

  protected void _(Events.RowInserted<SOLine> e)
  {
  if (e.Row == null) return;

  var line = (SOLine)e.Row;
  bool editable = IsCustomNSItem(e.Cache, line);

  PXUIFieldAttribute.SetReadOnly<SOLineExt.usrFactoryID>(e.Cache, null, false);
  PXUIFieldAttribute.SetEnabled<SOLineExt.usrFactoryID>(e.Cache, line, editable);
  }

  protected void _(Events.RowUpdated<SOLine> e)
  {
  if (e.Row == null) return;

  var line = (SOLine)e.Row;
  bool editable = IsCustomNSItem(e.Cache, line);

  PXUIFieldAttribute.SetReadOnly<SOLineExt.usrFactoryID>(e.Cache, null, false);
  PXUIFieldAttribute.SetEnabled<SOLineExt.usrFactoryID>(e.Cache, line, editable);

  if (!editable)
  e.Cache.SetValueExt<SOLineExt.usrFactoryID>(line, null);
  }

  private bool IsCustomNSItem(PXCache cache, SOLine line)
  {
  if (line?.InventoryID == null)
  return false;

  InventoryItem item =
  PXSelectorAttribute.Select<SOLine.inventoryID>(cache, line) as InventoryItem;

  if (item?.ItemClassID == null)
  return false;

  INItemClass itemClass = INItemClass.PK.Find(Base, item.ItemClassID);
  return string.Equals(itemClass?.ItemClassCD, "CUSTOMNS", StringComparison.OrdinalIgnoreCase);
  }
  }
}

Best answer by darylbowman

First off I’d recommend going through the developer series training materials.

This.

ChatGPT is helpful, but it does not understand all the mechanics of the Acumatica framework.

For instance, you should only change the state of controls in a RowSelected event handler. Rip out the rest.

And try something like this:

public class SOOrderEntry_Extension : PXGraphExtension<SOOrderEntry>
{
    protected void _(Events.RowSelected<SOLine> e, PXRowSelected b)
    {
        b?.Invoke(e.Cache, e.Args);

        SOLine row = e.Row;
        if (row is null) return;

        bool editable = IsCustomNSItem(e.Cache, line);
        PXTrace.WriteInformation($"Editable: {editable}");
        PXUIFieldAttribute.SetEnabled<SOLineExt.usrFactoryID>(e.Cache, line, editable);
    }
}

Load a record who’s row SHOULD be enabled and check the trace to make sure ‘editable’ is actually returning the correct value.

I suspect this line is returning ‘null’:

InventoryItem item = PXSelectorAttribute.Select<SOLine.inventoryID>(cache, line) as InventoryItem;

darylbowman · Accepted Answer

First off I’d recommend going through the developer series training materials.

This.

ChatGPT is helpful, but it does not understand all the mechanics of the Acumatica framework.

For instance, you should only change the state of controls in a RowSelected event handler. Rip out the rest.

And try something like this:

public class SOOrderEntry_Extension : PXGraphExtension<SOOrderEntry>
{
    protected void _(Events.RowSelected<SOLine> e, PXRowSelected b)
    {
        b?.Invoke(e.Cache, e.Args);

        SOLine row = e.Row;
        if (row is null) return;

        bool editable = IsCustomNSItem(e.Cache, line);
        PXTrace.WriteInformation($"Editable: {editable}");
        PXUIFieldAttribute.SetEnabled<SOLineExt.usrFactoryID>(e.Cache, line, editable);
    }
}

Load a record who’s row SHOULD be enabled and check the trace to make sure ‘editable’ is actually returning the correct value.

I suspect this line is returning ‘null’:

InventoryItem item = PXSelectorAttribute.Select<SOLine.inventoryID>(cache, line) as InventoryItem;

S1AW · Answer

​@Djangoyou are the best, thank you for the intuition, advice and ideas!

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