背景说明：
K/3 Cloud 不支持在下推时，同时携带两个单据体的数据；
因此，需要在转换规则上，配置好携带主单据体；
而辅助单据体的数据，需要在插件中自行携带；

案例说明：
本案例，设计了两张单据A和B，都有两个单据体，主单据体为FEntity，第二单据体为FEntity2；
主单据体的字段，已经配置的单据转换规则 - 字段映射关系；
而第二单据体，需要通过插件携带；
第二单据体仅有一个文本字段F_JD_Text；

特别说明：
本案例不适用于同一张源单同时下推为多张目标单的情况：
这样情况是分单了，而第二单据体，无法对应拆分；

示例代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;using Kingdee.BOS;
using Kingdee.BOS.Util;
using Kingdee.BOS.Core;
using Kingdee.BOS.Core.Metadata;
using Kingdee.BOS.Core.Metadata.ConvertElement;
using Kingdee.BOS.Core.Metadata.ConvertElement.PlugIn;
using Kingdee.BOS.Core.Metadata.ConvertElement.PlugIn.Args;
using Kingdee.BOS.Core.Metadata.EntityElement;
using Kingdee.BOS.Core.Metadata.FormElement;
using Kingdee.BOS.Core.SqlBuilder;
using Kingdee.BOS.Orm.DataEntity;
using Kingdee.BOS.Contracts;
using Kingdee.BOS.App;namespace JDSample.ServicePlugIn.BillConvert
{/// <summary>/// 携带其他单据体/// </summary>[Description("携带其他单据体")]public class S151105TakeOtherEntryConvPlug : AbstractConvertPlugIn{/// <summary>/// 主单据体的字段携带完毕，与源单的关联关系创建好之后，触发此事件/// </summary>/// <param name="e"></param>public override void OnAfterCreateLink(CreateLinkEventArgs e){// 预先获取一些必要的元数据，后续代码要用到：// 源单第二单据体Entity srcSecondEntity = e.SourceBusinessInfo.GetEntity("FEntity2");// 目标单第一单据体Entity mainEntity = e.TargetBusinessInfo.GetEntity("FEntity");// 目标单第二单据体Entity secondEntity = e.TargetBusinessInfo.GetEntity("FEntity2");// 目标单关联子单据体Entity linkEntity = null;Form form = e.TargetBusinessInfo.GetForm();if (form.LinkSet != null && form.LinkSet.LinkEntitys != null&& form.LinkSet.LinkEntitys.Count != 0){linkEntity = e.TargetBusinessInfo.GetEntity(form.LinkSet.LinkEntitys[0].Key);}if (linkEntity == null){return;}// 获取生成的全部下游单据ExtendedDataEntity[] billDataEntitys = e.TargetExtendedDataEntities.FindByEntityKey("FBillHead");// 对下游单据，逐张单据进行处理foreach (var item in billDataEntitys){DynamicObject dataObject = item.DataEntity;// 定义一个集合，用于收集本单对应的源单内码HashSet<long> srcBillIds = new HashSet<long>();// 开始到主单据体中，读取关联的源单内码DynamicObjectCollection mainEntryRows = mainEntity.DynamicProperty.GetValue(dataObject) as DynamicObjectCollection;foreach (var mainEntityRow in mainEntryRows){DynamicObjectCollection linkRows = linkEntity.DynamicProperty.GetValue(mainEntityRow) as DynamicObjectCollection;foreach (var linkRow in linkRows){long srcBillId = Convert.ToInt64(linkRow["SBillId"]);if (srcBillId != 0&& srcBillIds.Contains(srcBillId) == false){srcBillIds.Add(srcBillId);}}}if (srcBillIds.Count == 0){continue;}// 开始加载源单第二单据体上的字段// 确定需要加载的源单字段（仅加载需要携带的字段）List<SelectorItemInfo> selector = new List<SelectorItemInfo>();selector.Add(new SelectorItemInfo("F_JD_Text"));// TODO: 继续添加其他需要携带的字段，示例代码略// 设置过滤条件string filter = string.Format(" {0} IN ({1}) ",e.SourceBusinessInfo.GetForm().PkFieldName,string.Join(",", srcBillIds));OQLFilter filterObj = OQLFilter.CreateHeadEntityFilter(filter);// 读取源单IViewService viewService = ServiceHelper.GetService<IViewService>();var srcBillObjs = viewService.Load(this.Context,e.SourceBusinessInfo.GetForm().Id,selector,filterObj);// 开始把源单单据体数据，填写到目标单上DynamicObjectCollection secondEntryRows = secondEntity.DynamicProperty.GetValue(dataObject) as DynamicObjectCollection;secondEntryRows.Clear();    // 删除空行foreach (var srcBillObj in srcBillObjs){DynamicObjectCollection srcEntryRows = srcSecondEntity.DynamicProperty.GetValue(srcBillObj) as DynamicObjectCollection;foreach (var srcEntryRow in srcEntryRows){// 目标单添加新行，并接受源单字段值DynamicObject newRow = new DynamicObject(secondEntity.DynamicObjectType);secondEntryRows.Add(newRow);// 填写字段值newRow["F_JD_Text"] = srcEntryRow["F_JD_Text"];// TODO: 逐个填写其他字段值，示例代码略}}}}}
}