【场景】由于反写是App层服务，不会创建源单视图模型，因此不会触发源单的值更新事件、实体服务规则等； 部分客户想通过反写修改单据体的字段的时候，同时触发该字段的值更新修改其他字段 【案例】采购订单反写采购申请单，触发值更新的案例分享 <1>变通案例1：通过复制多个反写规则同时反写 此场景适用于反写单据体的数量字段，同时汇总更新到单据头的数量字段 假定我们有一个反写规则是反写到单据体的数量  复制此规则，将反写上游单据字段修改为【汇总单据头字段】（通过反写变通实现单据体的汇总重新计算），如果存在超额判断，则把超额判断去掉，只保留反写  <2>变通案例2：通过插件代码，自行通过sql实现数据更新的逻辑，进行模拟值更新的更新逻辑，手动更新数据 这个案例不详细解析，可参考下 [保存成功后，手工反写](https://wenku.my7c.com/article/66164742058270464?productLineId=1) <3>案例3：通过创建源单视图，进行值更新，并手工保存 a）数据准备：配置实体服务规则，单据体文本汇总到单据头 参考：[实体服务规则汇总](https://wenku.my7c.com/article/128865436997123328?productLineId=1&isKnowledge=2)  b)通过采购订单 保存的操作服务插件，将下游单据编号反写到明细，并触发值更新  ```csharp using Kingdee.BOS; using Kingdee.BOS.Core.Bill; using Kingdee.BOS.Core.DynamicForm; using Kingdee.BOS.Core.DynamicForm.PlugIn; using Kingdee.BOS.Core.DynamicForm.PlugIn.Args; using Kingdee.BOS.Core.Metadata; using Kingdee.BOS.Core.Metadata.EntityElement; using Kingdee.BOS.Core.Metadata.FieldElement; using Kingdee.BOS.Orm.DataEntity; using Kingdee.BOS.ServiceHelper; using System; namespace DynamicFormPlugIn.Operation { [Kingdee.BOS.Util.HotUpdate] public class ServicePlugIn_DataChanged : AbstractOperationServicePlugIn { public class KeyConst { public static string EntityKey = "FPOOrderEntry";//采购订单的明细 public static string LinkKey = "FPOOrderEntry_Link"; public static string Link_STableName = "STableName"; public static string Link_FSBillId = "SBillId"; public static string Link_FSId = "SId"; public static string SrcEntityKey = "FEntity";//申请单的明细 public static string SrcEntityField = "F_BHR_TextEntity"; } /* * 案例：采购订单反写采购申请单，反写的同时需要触发值更新事件的场景 * */ public override void BeginOperationTransaction(BeginOperationTransactionArgs e) { Entity entity = this.BusinessInfo.GetEntity(KeyConst.EntityKey); Entity linkEntity = this.BusinessInfo.GetEntity(KeyConst.LinkKey); foreach (var dataObj in e.DataEntitys) { /* * <0>找到反写的源单内码 * 如果是直接上游可以通过link查找，如果是跨级可以通过携带源单内码进行查找 * * 此案例：通过link实体处理 */ if (dataObj == null) continue; if (!dataObj.DynamicObjectType.Properties.ContainsKey(entity.EntryName)) continue; DynamicObjectCollection rowColl = dataObj[entity.EntryName] as DynamicObjectCollection; if (rowColl == null || rowColl.Count <= 0) continue; if (!rowColl.DynamicCollectionItemPropertyType.Properties.ContainsKey(linkEntity.EntryName)) continue; foreach (var rowObj in rowColl) { if (rowObj == null) continue; DynamicObjectCollection linkColl = rowObj[linkEntity.EntryName] as DynamicObjectCollection; if (linkColl == null || linkColl.Count <= 0) continue; foreach (var linkObj in linkColl) { //仅处理采购申请单 string srcTableName = Kingdee.BOS.Util.ObjectUtils.Object2String(linkObj[KeyConst.Link_STableName]); if (!string.Equals(srcTableName, "T_PUR_ReqEntry", StringComparison.OrdinalIgnoreCase)) continue; int sbillId = Kingdee.BOS.Util.ObjectUtils.Object2Int(linkObj[KeyConst.Link_FSBillId]); if (sbillId <= 0) continue; int sentryId = Kingdee.BOS.Util.ObjectUtils.Object2Int(linkObj[KeyConst.Link_FSId]); if (sentryId <= 0) continue; //<1>根据源单内码，创建目标视图，调用字段更新并触发值更新事件 UpdateReq(sbillId, sentryId, Kingdee.BOS.Util.ObjectUtils.Object2String(dataObj["BillNo"])); } } } } private void UpdateReq(int billId, int entryId, string updateVal) { IDynamicFormView dynamicFormView = CreateBillView(this.Context, "PUR_Requisition", billId.ToString()); if (dynamicFormView == null) return; Entity entity = dynamicFormView.BillBusinessInfo.GetEntity(KeyConst.SrcEntityKey); Field field = dynamicFormView.BillBusinessInfo.GetField(KeyConst.SrcEntityField); //<2>根据entryId找到关联是哪一行，然后调用字段的修改，并触发值更新事件 var rowColl = dynamicFormView.Model.GetEntityDataObject(entity); if (rowColl == null || rowColl.Count <= 0) return; bool hasUpdate = false; foreach(var rowObj in rowColl) { if (rowObj == null) continue; int rowId = Kingdee.BOS.Util.ObjectUtils.Object2Int(rowObj[0]); if(rowId == entryId) { //<3>调用字段的修改，并触发值更新 dynamicFormView.Model.SetValue(field, rowObj, updateVal); hasUpdate = true; } } if (hasUpdate) { Kingdee.BOS.ServiceHelper.BusinessDataServiceHelper.Save(this.Context, dynamicFormView.BillBusinessInfo, new DynamicObject[] { dynamicFormView.Model.DataObject }, null); } } #region 创建视图 private static BillOpenParameter CreateOpenParameter(Context ctx, FormMetadata metadata, string pkValue) { var form = metadata.BusinessInfo.GetForm(); BillOpenParameter openPara = new BillOpenParameter(form.Id, metadata.GetLayoutInfo().Id); openPara.Context = ctx; openPara.PageId = Guid.NewGuid().ToString(); openPara.Status = OperationStatus.VIEW; openPara.CreateFrom = CreateFrom.Default; openPara.DefaultBillTypeId = string.Empty; openPara.PkValue = pkValue; openPara.FormMetaData = metadata; openPara.SetCustomParameter(Kingdee.BOS.Core.FormConst.PlugIns, form.CreateFormPlugIns()); openPara.ServiceName = form.FormServiceName; return openPara; } /// <summary> /// 创建视图 /// </summary> /// <param name="ctx"></param> /// <param name="formId"></param> /// <param name="pkValue"></param> /// <returns></returns> private static IDynamicFormView CreateBillView(Context ctx, string formId, string pkValue) { FormMetadata metadata = MetaDataServiceHelper.Load(ctx, formId) as FormMetadata; if (metadata == null) return null; var openParameter = CreateOpenParameter(ctx, metadata, pkValue); var provider = metadata.BusinessInfo.GetForm().GetFormServiceProvider(); string importViewClass = "Kingdee.BOS.Web.Import.ImportBillView,Kingdee.BOS.Web"; Type type = Type.GetType(importViewClass); IDynamicFormViewService billView = (IDynamicFormViewService)Activator.CreateInstance(type); billView.Initialize(openParameter, provider); billView.LoadData(); return (IDynamicFormView)billView; } #endregion } } ``` c)案例效果：插件代码仅更新单据体的文本，单据头的汇总是通过值更新计算的；  【备注】 此案例没有控制反写超额相关逻辑，仅是说明服务插件怎么触发值更新； 如果需要可通过反写插件，或自行加业务逻辑判断