在Acumatica网格中添加额外的选择器窗口，需要使用以下代码：

1. 创建一个自定义Filter_RowSelected方法以获取选定行的值：

protected void CustomFilter_RowSelected(PXCache sender, PXRowSelectedEventArgs e) { if (e.Row == null) return;

CustomFilter row = (CustomFilter) e.Row;

if (row.InventoryID != null)
{
    InventoryItem item = PXSelect>>>.Select(this, row.InventoryID);

    sender.SetValue(row, item.Descr);
    sender.SetValue(row, item.ItemType);
    sender.SetValue(row, item.ItemClassID);
}

}

2. 创建一个自定义字段以显示额外选择器窗口：

public class CustomFilter : IBqlTable { #region InventoryID

public abstract class inventoryID : PX.Data.BQL.BqlInt.Field
{
}

[Inventory(DisplayName = "Inventory ID")]
public virtual int? InventoryID { get; set; }

#endregion InventoryID

#region ItemType

public abstract class itemType : PX.Data.BQL.BqlString.Field
{
}

[PXString]
[PXUIField(DisplayName = "Item Type")]
public virtual string ItemType { get; set; }

#endregion ItemType

#region ItemClass

public abstract class itemClass : PX.Data.BQL.BqlString.Field
{
}

[PXString]
[PXUIField(DisplayName = "Item Class")]
public virtual string ItemClass { get; set; }

#endregion ItemClass

#region ItemDescription

public abstract class itemDescription : PX.Data.BQL.BqlString.Field
{
}

[PXString]
[PXUIField(DisplayName = "Item Description")]
public virtual string ItemDescription { get; set; }

#endregion ItemDescription

}

3. 使用PXSelector属性在网格中定义InventoryID字段：