Arcgis Engine9.2 Undo 和 Redo 功能实现

本文介绍了如何在ArcGIS Engine 9.2中实现撤销(Undo)和重做(Redo)功能。通过获取地图对象，判断当前图层是否可编辑，并调用相应的工作区编辑方法来实现撤销和重做操作。

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Arcgis Engine9.2 Undo 和 Redo 功能实现

/// <summary>
        /// 撒消编辑
        /// </summary>
        /// <param name="m_pMap">IMap 地图对象</param>
        public void MapUndoEdit(IMap m_pMap)
        {
            IEngineEditProperties ep = new EngineEditorClass();
            ILayer m_pCurrentLayer = ep.TargetLayer;
            if (m_pCurrentLayer == null) return;
            IFeatureLayer pFeatureLayer = (IFeatureLayer)m_pCurrentLayer;
            IDataset pDataset = (IDataset)pFeatureLayer.FeatureClass;
            if (pDataset == null) return;

            IWorkspaceEdit pWorkspaceEdit = (IWorkspaceEdit)pDataset.Workspace;
            bool bHasUndos = false;
            pWorkspaceEdit.HasUndos(ref bHasUndos);
            if (bHasUndos)
                pWorkspaceEdit.UndoEditOperation();
            IActiveView pActiveView = (IActiveView)m_pMap;
            pActiveView.Refresh();
        }

        /// <summary>
        /// 重做
        /// </summary>
        /// <param name="m_pMap">IMap 地图对象</param>
        public void MapRedoEdit(IMap m_pMap)
        {
            IEngineEditProperties ep = new EngineEditorClass();
            ILayer m_pCurrentLayer = ep.TargetLayer;
            if (m_pCurrentLayer == null) return;
            IFeatureLayer pFeatureLayer = (IFeatureLayer)m_pCurrentLayer;
            IDataset pDataset = (IDataset)pFeatureLayer.FeatureClass;
            if (pDataset == null) return;
            IWorkspaceEdit pWorkspaceEdit = (IWorkspaceEdit)pDataset.Workspace;
            bool bHasUndos = false;
            pWorkspaceEdit.HasUndos(ref bHasUndos);
            if (bHasUndos)
                pWorkspaceEdit.RedoEditOperation();
            IActiveView pActiveView = (IActiveView)m_pMap;
            pActiveView.Refresh();
        }