C# PX选择器仅选择一个字段

但是我有一条消息“关键字'JOIN'附近的语法不正确。”

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我的错误是什么？

尝试将

PXSelector

属性替换为以下属性：

  #region EquimentID
  public abstract class quimentID : PX.Data.IBqlField { }
  protected Int32? _EquimentID;
  [PXInt]
  [PXSelector(
       typeof(EPEquipment.equipmentID),
       SubstituteKey = typeof(EPEquipment.equipmentCD),
       DescriptionField = typeof(EPEquipment.description)
    )]
  [PXUIField(DisplayName = "Equiment ID")]
  public virtual Int32? EquimentID { get; set; }
  #endregion

[PXSelector（类型）（搜索），
替换键=类型（EPEquipment.equipmentCD），
DescriptionField=类型（EPEpment.description））]

[PXSelector(typeof(Search<EPEquipment.equipmentID>),
       SubstituteKey = typeof(EPEquipment.equipmentCD),
       DescriptionField = typeof(EPEquipment.description))]