在Acumatica中需要将采购订单号（PO Nbr）加入销售订单行（SO Line）中。以下是实现这一目标的示例代码：

1.创建PO Nbr列

public class SOLineExt : PXCacheExtension
{
    #region UsrPONbr
    [PXDBString(15, IsUnicode = true, InputMask = ">CCCCCCCCCCCCCCC")]
    [PXUIField(DisplayName = "PO Nbr.")]
    public virtual string UsrPONbr { get; set; }
    public abstract class usrPONbr : IBqlField { }
    #endregion
}

2.添加PO Nbr列到SO行维度表中。

public class SOLineExt2 : PXCacheExtension,
        And>>
{
    #region UsrPONbr
    [PXString(15, IsUnicode = true)]
    [PXUIField(DisplayName = "PO Nbr.", Enabled = false)]
    [PXDBScalar(typeof(Search,
        And>>>))]
    public virtual string UsrPONbr { get; set; }
    public abstract class usrPONbr : IBqlField { }
    #endregion
}

3.创建PO Nbr在SO行的图形设定。

public class SOOrderEntryExt : PXGraphExtension
{
    public PXSelect>,
            And>,
            And,
            And