CAD2GIS:arcengine注记添加(转载)

在做CAD注记转GIS注记，坎坷，百度了几乎所有可能的资料。

主要参照这里的方法（c++）。我使用C#重写了，均测试通过。

重要提示：

必须创建好注记图层，设置好比例尺和坐标系。困在这里两天没通过。

方法一 通过IFDOGraphicsLayer添加Elements的方式实现

/// <summary>         /// 添加到注记图层         /// </summary>         /// <param name="pFeatCls">注记图层</param>         /// <param name="pGeometry">插入的位置:一般是一个IPoint</param>         /// <returns></returns>         protected bool InsertAnnoFea(IFeatureClass pFeatCls, IGeometry pGeometry)         {              IFeatureClass annocls = pFeatCls;             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();             ITextElement pTextElement = AnnoUtil.MakeTextElement(text, dHSize, rgbColor, sHFont, dHAngle) as ITextElement;             IElement pElement = pTextElement as IElement;             pElement.Geometry = pGeometry;              pElementColl.Add(pElement, 0);              pFDOGLayer.DoAddElements(pElementColl, 0);             pFDOGLayer.EndAddElements();              pElementColl.Clear();             pTransactions.CommitTransaction();              return true;         }

方法二 通过IAnnotationFeature来实现

/// <summary>         /// 添加到注记图层         /// </summary>         /// <param name="pFeatCls">注记图层</param>         /// <param name="pGeometry">插入的位置:一般是一个IPoint</param>         /// <returns></returns>         protected bool InsertAnnoFea2(IFeatureClass pFeatCls, IGeometry pGeometry)         {             IFeatureClass annocls = pFeatCls;             IWorkspace workspace = ((IDataset)annocls).Workspace;             IWorkspaceEdit workspaceEdit = workspace as IWorkspaceEdit;             bool startEdit = workspaceEdit.IsBeingEdited();             if (!startEdit)             {                 workspaceEdit.StartEditing(false);             }             workspaceEdit.StartEditOperation();              ITextElement pTextElement = AnnoUtil.MakeTextElement(text, dHSize, rgbColor, sHFont, dHAngle) as ITextElement;             IElement pElement = pTextElement as IElement;             pElement.Geometry = pGeometry;              IFeature pFeature = annocls.CreateFeature();              IAnnotationFeature pAnnoFeature = pFeature as IAnnotationFeature;             pAnnoFeature.Annotation = pElement;             pFeature.Store();              workspaceEdit.StopEditOperation();             workspaceEdit.StopEditing(true);             return true;         }

​​junyuz​​：这两种方法，经过实际测试都可以成功，在导入的时候还需要注意一下空间参考系的问题，需要对应上，特别要注意dwg中的数据是否正确，如果注记的坐标不在参考系范围内，会出现导入失败的现象，我就是因为这个低级的错误，纠结了两天。

ps. MakeTextElement是创建ITextElement的方法。

​​CAD2GIS:arcengine注记添加​​