Dynamic Selector Functionality

APInvoiceEntryExt.cs

namespace MyProject
{
    public class APInvoiceEntryExt : PXGraphExtension<APInvoiceEntry>
    {
        public PXSelect<MyCommand> Commands;

        public PXSelect<GLTran> GLTrans;
        public PXSelect<FixedAsset> FixedAssets;

        protected void MyCommand_CommandData_FieldSelecting(PXCache cache, PXFieldSelectingEventArgs e)
        {

            var row = (MyCommand)e.Row;
            if (row == null)
                return;

            PXFieldState state = PXFieldState.CreateInstance(e.ReturnState,
                typeof(string), false, true, 1, null, null, null, typeof(MyCommand.commandData).Name);
            e.ReturnState = state;

            var id = (int)row.CommandID;
            if (id == 0)
            {
                state.ViewName = nameof(FixedAssets);
                state.DescriptionName = nameof(FixedAsset.description);
                state.FieldList = new string[]
                {
                    nameof(FixedAsset.assetID),
                    nameof(FixedAsset.description),
                    nameof(FixedAsset.assetTypeID),
                    nameof(FixedAsset.assetCD)
                };
                var selectorCache = Base.Caches<FixedAsset>();
                state.HeaderList = new string[]
                {
                    PXUIFieldAttribute.GetDisplayName<FixedAsset.assetID>(selectorCache),
                    PXUIFieldAttribute.GetDisplayName<FixedAsset.description>(selectorCache),
                    PXUIFieldAttribute.GetDisplayName<FixedAsset.assetTypeID>(selectorCache),
                    PXUIFieldAttribute.GetDisplayName<FixedAsset.assetCD>(selectorCache),
                };
            }
            else
            {
                state.ViewName = nameof(GLTrans);
                state.DescriptionName = nameof(GLTran.tranDesc);
                state.FieldList = new string[]
                {
                    nameof(GLTran.module), nameof(GLTran.lineNbr), nameof(GLTran.batchNbr),
                    nameof(GLTran.accountID), nameof(GLTran.tranDesc), nameof(GLTran.branchID)
                };
                var selectorCache = Base.Caches<GLTran>();
                state.HeaderList = new string[]
                {
                    PXUIFieldAttribute.GetDisplayName<GLTran.module>(selectorCache),
                    PXUIFieldAttribute.GetDisplayName<GLTran.lineNbr>(selectorCache),
                    PXUIFieldAttribute.GetDisplayName<GLTran.batchNbr>(selectorCache),
                    PXUIFieldAttribute.GetDisplayName<GLTran.accountID>(selectorCache),
                    PXUIFieldAttribute.GetDisplayName<GLTran.tranDesc>(selectorCache)
                };
            }

            state.DisplayName = PXUIFieldAttribute.GetDisplayName<MyCommand.commandData>(cache);
            state.Visible = true;
            state.Visibility = PXUIVisibility.Visible;
            state.Enabled = true;
        }

        public PXAction<PX.Objects.AP.APInvoice> CommandButton;

        [PXButton(CommitChanges = true)]
        [PXUIField(DisplayName = "Command Button")]
        protected void commandButton()
        {
            Commands.AskExt();
        }
    }
}

Hi @YuriyZaletskyy
Can you send the CommandData field code in MyCommand DAC.
Thanks.