我如何通过预加载字段更改Enabled =属性

Question

我想使用现有的布尔字段修改PXUIField Enabled=false/true

public abstract class lastBatNbr : PX.Data.IBqlField
{
}

protected String _LastBatNbr;
[PXDBString(10, IsFixed = true)]
[PXUIField(DisplayName = "Last Batch Nbr")] 

public virtual String LastBatNbr
{
    get
    {
    return this._LastBatNbr;
    }
    set
    {
    this._LastBatNbr = value;
    }
}