下推携带的时候，通版内容只能下推主单据体，但是有的时候，我们又想把其他单据体内容，这个时候，简单插件处理一些，就可以。千万不要想着用SQL查询，然后插入，下推不一定会先保存。

一、准备好，需要下推的主表体标识、二开携带的表体标识

1. 下游主表体

   

2. 下游 二开携带表体

   

二、配置单据转换插件

插件策略中挂载单据转换插件

三、插件代码

代码具有通用性，只需要标识变更，还需要根据字段查询变更即可

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;
using System.Data;
namespace 你的命名空间
{
    [HotUpdate]
    public class SalOrderOutStockCar : AbstractConvertPlugIn
    {
        ///
        /// 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
        ///
        ///
        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("F_BHR_Cars");
            // 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("F_BHR_Cars");
            // 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_BHR_BILLENTRYID"));
                selector.Add(new SelectorItemInfo("F_BHR_Material"));
                selector.Add(new SelectorItemInfo("F_BHR_UnitID"));
                selector.Add(new SelectorItemInfo("F_BHR_Qty"));
                selector.Add(new SelectorItemInfo("F_BHR_CAR"));
                // 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 = ServiceFactory.GetViewService(this.Context);
                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();  
                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_BHR_BILLENTRYID"] = srcEntryRow["F_BHR_BILLENTRYID"];
                        newRow["F_BHR_Material"] = srcEntryRow["F_BHR_Material"];
                        newRow["F_BHR_UnitID"] = srcEntryRow["F_BHR_UnitID"];
                        newRow["F_BHR_Qty"] = srcEntryRow["F_BHR_Qty"];
                        newRow["F_BHR_CAR"] = srcEntryRow["F_BHR_CAR"];
                    }
                }
            }
        }
    }
}

请教个问题，下推后数据携带下去了，但是保存后重新打开基础资料类型的字段都没存到数据库里是什么原因，文本类字段是保存进去了的。

mark