分享一个利用递归方式进行BOM表正查的代码，仅供参考，如有不足之处，请多多包涵！

private void GetBomAll(DynamicObject parentBomObj)
{
   var bomTreeEntity = (DynamicObjectCollection)parentBomObj["TreeEntity"];
   foreach (DynamicObject bomRowObj in bomTreeEntity)
   {
       //获取BOM行子件物料数据
       var materialId = (DynamicObject)bomRowObj["MATERIALIDCHILD"];
       //判断是否有子BOM版本
       if (bomRowObj["BOMID"] != null)
       {
           //这里需要再获取一下BOM对象完整数据包
           var bomObj = KEDUtils.GetQueryData(this.Context, "ENG_BOM",string.Format(@"FID = {0}", bomRowObj["BOMID_Id"]));
           this.GetBomAll(bomObj);
       }
       else
       {
           //判断是否可为主产品
           if (Convert.ToBoolean((materialId["MaterialProduce"] as DynamicObjectCollection)?[0]["IsMainPrd"]))
               throw new KDException("", "部件：" + materialId["Name"] + " 未指定子BOM版本！");
       }
       //TODO 业务处理
   }
}

/// <summary>
/// 取数方案，通过业务对象来获取单个数据，返回单个DynamicObject对象
/// </summary>
/// <param name="formId"></param>
/// <param name="queryWhere">查询条件</param>
/// <returns>返回单个DynamicObject对象</returns>
public static DynamicObject GetQueryData(Context ctx, string formId, string queryWhere)
{
   FormMetadata meta = MetaDataServiceHelper.Load(ctx, formId) as FormMetadata;
   QueryBuilderParemeter queryParam = new QueryBuilderParemeter();
   queryParam.FormId = formId;
   if (meta != null) queryParam.BusinessInfo = meta.BusinessInfo;
   queryParam.FilterClauseWihtKey = queryWhere;
   var dyDatas = BusinessDataServiceHelper.Load(ctx, meta.BusinessInfo.GetDynamicObjectType(), queryParam);

   if (dyDatas.Length == 0) return null;
   return dyDatas[0];
}

补充：为保证每个BOM表的子BOM版本都有录入，可以添加录入子项物料自动携带子BOM插件。

//物料清单单据插件-值更新事件
public override void DataChanged(DataChangedEventArgs e)
{
    base.DataChanged(e);
    if (e.Field.Key.Equals("FMATERIALIDCHILD"))
    {
        var subMatObj = (DynamicObject)this.View.Model.GetValue("FMATERIALIDCHILD", e.Row);
        if(subMatObj == null) return;
        var erpClsId = Convert.ToInt32(((DynamicObjectCollection)subMatObj["MaterialBase"])[0]["ErpClsID"]);
        if(erpClsId != 1)
        {
            var subBomObj = KEDUtils.GetQueryData(this.Context, "ENG_BOM", string.Format(@"FMaterialId = {0} and FDocumentStatus='C' and FForbidStatus='A'", e.NewValue));
            if(subBomObj == null) return;
            this.Model.SetItemValueByID("FBOMID",subBomObj["Id"],e.Row);
        }
    }
}