自定义arcengine编辑条 (能够撤销和重做）

http://bbs.esrichina-bj.cn/ESRI/viewthread.php?tid=75611&extra=&page=1

http://www.gisall.com/?uid-99501-mode-theme

  #region IEditStack
    interface IEditStack
    {
        bool IsEditing();
        bool HasEdited();
        void StartEditing();
        void SaveEditing(bool save);
        void StopEditing(bool save);
        bool HasRedo();
        bool HasUndo();
        void RodoEditing();
        void UndoEditing();
    }
    #endregion

class Edit : IEditStack
    {
        protected bool isEditing;
        protected bool hasEditing;
        protected IFeatureLayer currentLayer;              //当前编辑图层
        protected IWorkspaceEdit workspaceEdit;
        protected IMap map;
        protected List<IFeature> selectFeatures;           //选择要素集，用于删除要素

        public Edit(IFeatureLayer editLayer, IMap map)
        {
            currentLayer = editLayer;
            this.map = map;
        }
        public Edit()
        {
        }

        #region 添加、选择、删除要素方法
        /// <summary>
        /// 在当前图层添加要素
        /// </summary>
        /// <param name="geometry">几何要素</param>
        public void AddFeature(IGeometry geometry)
        {
            if (currentLayer == null) return;
            IFeatureClass featureClass = currentLayer.FeatureClass;
            if (featureClass.ShapeType != geometry.GeometryType || geometry == null)
                return;

            if (!isEditing)
            {
                MessageBox.Show("请先开启编辑");
                return;
            }
            try
            {
                workspaceEdit.StartEditOperation();
                IFeature feature;
                feature = featureClass.CreateFeature();
                feature.Shape = geometry;
                feature.Store();
                workspaceEdit.StopEditOperation();
                //高亮显示添加要素
                map.ClearSelection();
                map.SelectFeature(currentLayer as ILayer, feature);
                ((IActiveView)map).PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
                hasEditing = true;
            }
            catch (Exception exc)
            {
                MessageBox.Show(exc.Message);
            }
        }
        /// <summary>
        /// 在当前图层上进行要素的选择，如果需要对所有FeatureLayer进行选择的话，可以使用IMap.SelectByShape()
        /// </summary>
        /// <param name="geometry"></param>
        public void SelectFeatures(IGeometry geometry)
        {
            if (geometry == null)
                return;

            ISpatialFilter spatialFilter = new SpatialFilterClass();
            spatialFilter.Geometry = geometry;
            spatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
            IFeatureCursor featureCursor = currentLayer.Search(spatialFilter, false);
            selectFeatures = new List<IFeature>();
            IFeature feature = featureCursor.NextFeature();
            map.ClearSelection();
            while (feature != null)
            {
                map.SelectFeature(currentLayer as ILayer, feature);
                selectFeatures.Add(feature);
                feature = featureCursor.NextFeature();
            }
            //System.Runtime.InteropServices.Marshal.ReleaseComObject(featureCursor);
            ((IActiveView)map).PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
        }
        /// <summary>
        /// 删除选择的要素
        /// </summary>
        public void DeleteSelectFeatures()
        {
            if (selectFeatures == null || !isEditing)
                return;
            //先清除选择集
            ClearSelection();
            //删除要素
            workspaceEdit.StartEditOperation();
            foreach (IFeature feature in selectFeatures)
            {
                feature.Delete();
            }
            workspaceEdit.StopEditOperation();
            hasEditing = true;
            selectFeatures = null;
        }
        /// <summary>
        /// 清除地图上显示的选择要素集
        /// </summary>
        public void ClearSelection()
        {
            ((IActiveView)map).PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
            map.ClearSelection();
            ((IActiveView)map).PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
        }
        #endregion



        #region IEditStack 成员

        public bool IsEditing()
        {
            return isEditing;
        }

        public bool HasEdited()
        {
            return hasEditing;
        }

        public void StartEditing()
        {
            IFeatureClass featureClass = currentLayer.FeatureClass;
            IWorkspace workspace = (featureClass as IDataset).Workspace;
            workspaceEdit = workspace as IWorkspaceEdit;
            if (workspaceEdit == null)
                return;
            if (!workspaceEdit.IsBeingEdited())
            {
                workspaceEdit.StartEditing(true);
                workspaceEdit.EnableUndoRedo();
                isEditing = true;
            }
        }

        public void SaveEditing(bool save)
        {
            if (!save)
            {
                workspaceEdit.StopEditing(false);
            }
            else if (save && hasEditing && isEditing)
            {
                workspaceEdit.StopEditing(true);
            }
            hasEditing = false;
        }

        public void StopEditing(bool save)
        {
            this.SaveEditing(save);
            isEditing = false;
        }

        public bool HasRedo()
        {
            bool hasRedo = false;
            if (isEditing && hasEditing)
            {
                workspaceEdit.HasRedos(ref hasRedo);
            }
            return hasRedo;
        }

        public bool HasUndo()
        {
            bool hasUndo = false;
            if (isEditing && hasEditing)
            {
                workspaceEdit.HasUndos(ref hasUndo);
            }
            return hasUndo;
        }

        public void RodoEditing()
        {
            if (!isEditing || !hasEditing)
                return;
            workspaceEdit.RedoEditOperation();
        }

        public void UndoEditing()
        {
            if (!isEditing || !hasEditing)
                return;
            //先清除选择集
            ClearSelection();
            workspaceEdit.UndoEditOperation();
        }

        #endregion
    }

class Edit2 : Edit
    {
        private IFeatureDataset featureDataset;   //当前编辑featuredataset

        //对featureDataset操作构造函数
        public Edit2(IFeatureDataset featureDataset, IMap map)
        {
            this.featureDataset = featureDataset;
            this.map = map;
        }
        //对单个图层操作构造函数
        public Edit2(IFeatureLayer featLyr, IMap map)
            : base(featLyr, map)
        {
        }
        public Edit2()
        {
        }
        public new void StartEditing()
        {
            if (featureDataset != null)
            {
                IFeatureWorkspace featureWorksapce = featureDataset.Workspace as IFeatureWorkspace;
                workspaceEdit = featureWorksapce as IWorkspaceEdit;
                if (!workspaceEdit.IsBeingEdited())
                {
                    workspaceEdit.StartEditing(true);
                    workspaceEdit.EnableUndoRedo();
                    isEditing = true;
                }
            }
            else //单一图层的话调用基类开始编辑
            {
                base.StartEditing();
            }
        }

        //保存、停止、撤销、重做等编辑可直接使用基类函数

        //对featuredataset中单个featureclass进行添加和选择要素
        public void AddFeature(IFeatureLayer featurelayer, IGeometry geometry)
        {
            currentLayer = featurelayer;
            base.AddFeature(geometry);
        }
        public void SelectFeatures(IFeatureLayer featureLayer, IGeometry geometry)
        {
            currentLayer = featureLayer;
            base.SelectFeatures(geometry);
        }
    }