转自原文创建注记图层要素
创建完文本注记TextElement后，可以选择以屏幕注记的形式加到屏幕上，也可以通过下面的方式转为注记图层要素：
IFeatureClass annocls = 获取注记图层 IDataset pDataset = annocls as IDataset; ITransactions pTransactions = pDataset.Workspace as ITransactions; pTransactions.StartTransaction(); IFDOGraphicsLayerFactory pFDOGLFactory = new FDOGraphicsLayerFactoryClass(); ILayer tmpLayer = pFDOGLFactory.OpenGraphicsLayer(pDataset.Workspace as IFeatureWorkspace, annocls.FeatureDataset, pDataset.Name); IFDOGraphicsLayer pFDOGLayer = tmpLayer as IFDOGraphicsLayer; IElementCollection pElementColl = new ElementCollectionClass(); pFDOGLayer.BeginAddElements(); ////每新增100个提交下，最后再提交下。防止过多转换失败 if ((pElementColl != null) && (pElementColl.Count == 100)) { pFDOGLayer.DoAddElements(pElementColl, 0); pFDOGLayer.EndAddElements(); pElementColl.Clear(); pTransactions.CommitTransaction(); pTransactions.StartTransaction(); pFDOGLayer.BeginAddElements(); } if (pElementColl.Count > 0) pFDOGLayer.DoAddElements(pElementColl, 0); pFDOGLayer.EndAddElements(); pElementColl.Clear(); pTransactions.CommitTransaction();