基于ArcGIS10.0和Oracle10g的空间数据管理平台十七（C#开发）-空间数据编辑（下）

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    上一篇介绍了空间数据编辑一部分实现，今天继续完成剩余的部分实现。

1.根据选择编辑任务的不同显示不同形状的鼠标，以便指示相应任务方便编辑操作

 1         /// <summary> 2 /// 根据选择编辑任务的不同显示不同形状的鼠标，以便指示相应任务方便编辑操作 3 /// </summary> 4 /// <param name="sender"></param> 5 /// <param name="e"></param> 6         private void cboTasks_SelectedIndexChanged(object sender, EventArgs e) 7         { 8             // Restate  9             m_MapControl.MousePointer = esriControlsMousePointer.esriPointerDefault;10             m_bEditingFtr = false;11             m_bSketching = false;12             m_bSelecting = false;13             m_bMove = false;14 15             // Select an operation and mouse pointer depending on the user choice 16             switch (cboTasks.SelectedIndex)17             {18                 case 0:19                     // Do Nothing - the tool has already been reset 20                     break;21                 case 1:22                     m_MapControl.MousePointer = esriControlsMousePointer.esriPointerCrosshair;23                     m_bEditingFtr = true;24                     break;25                 case 2:26                     m_MapControl.MousePointer = esriControlsMousePointer.esriPointerPencil;27                     m_bSketching = true;28                     break;29                 case 3:30                     m_MapControl.MousePointer = esriControlsMousePointer.esriPointerCrosshair;31                     m_bSelecting = true;32                     break;33                 case 4:34                     m_MapControl.MousePointer = esriControlsMousePointer.esriPointerHand;35                     m_bMove = true;36                     break;37             } 38 39         }

2.选择需要的图层并且在地图编辑控件中显示出来

1         /// <summary> 2 /// 选择需要的图层并且在地图编辑控件中显示出来 3 /// </summary> 4 /// <param name="sender"></param> 5 /// <param name="e"></param> 6         private void cboLayers_SelectedIndexChanged(object sender, EventArgs e) 7         { 8             if (m_pMap == null) 9             {10                 return;11             }12 13             // Clear any existing selection 14             m_pMap.ClearSelection();15             IActiveView ipActiveView;16             ipActiveView = (IActiveView)m_pMap;17             ipActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);18 19             String strLayerName = cboLayers.SelectedItem.ToString();20             axMapControl1.Map.ClearLayers();21             AddLayerToMapCtl(strLayerName, true);22             m_pCurrentLayer = m_pMap.get_Layer(0);23 24             SetControlStates();25         }

3.测试是否击中地图对象或地图对象上的节点

1         /// <summary> 2 /// 测试是否击中地图对象或地图对象上的节点 3 /// </summary> 4 /// <param name="tolerance">查询容差</param> 5 /// <param name="pPoint">点击位置</param> 6 /// <param name="pFeature">测试对象</param> 7 /// <param name="pHitPoint">查询目标点</param> 8 /// <param name="hitDist">目标点与点击点距离</param> 9 /// <param name="partIndex">节索引</param>10 /// <param name="vertexIndex">点索引</param>11 /// <param name="vertexHit">是否击中点</param>12 /// <returns>是否击中测试对象</returns>13         private bool TestGeometryHit(double tolerance, IPoint pPoint, IFeature pFeature, 14             ref IPoint pHitPoint, ref double hitDist, ref int partIndex, ref int vertexIndex, 15             ref int vertexOffset, ref bool vertexHit)16         {17             // Function returns true if a feature's shape is hit and further defines 18 // if a vertex lies within the tolorance 19             bool bRetVal = false;20             IGeometry pGeom = (IGeometry)pFeature.Shape;21 22             IHitTest pHitTest = (IHitTest)pGeom;23             pHitPoint = new ESRI.ArcGIS.Geometry.Point();24             bool bTrue = true;25             // First check if a vertex was hit 26 // 检查节点是否被击中27             if (pHitTest.HitTest(pPoint, tolerance, esriGeometryHitPartType.esriGeometryPartVertex, 28                 pHitPoint, ref hitDist, ref partIndex, ref vertexIndex, ref bTrue))29             {30                 bRetVal = true;31                 vertexHit = true;32             }33             // Secondly check if a boundary was hit 34 // 检边界是否被击中35             else if (pHitTest.HitTest(pPoint, tolerance,  esriGeometryHitPartType.esriGeometryPartBoundary,36                 pHitPoint, ref hitDist, ref partIndex, ref vertexIndex, ref bTrue))37             {38                 bRetVal = true;39                 vertexHit = false;40             }41 42             // Calculate offset to vertexIndex for multipatch geometries 43             if (partIndex > 0)44             {45                 IGeometryCollection pGeomColn = (IGeometryCollection)pGeom;46                 vertexOffset = 0;47                 for (int i = 0; i < partIndex; i++)48                 {49                     IPointCollection pPointColn = (IPointCollection)pGeomColn.get_Geometry(i);50                     vertexOffset = vertexOffset + pPointColn.PointCount;51                 }52             }53 54             return bRetVal;55         }

4.向图层中更新新的地图对象，并使之处于选中状态

1         /// <summary> 2 /// 向图层中更新新的地图对象，并使之处于选中状态 3 /// </summary> 4 /// <param name="pFeature"></param> 5 /// <param name="pGeometry"></param> 6         private void UpdateFeature(IFeature pFeature, IGeometry pGeometry) 7         { 8             // Make sure we are actually editing this layer. If not give a warning.  9             IDataset pDataset = (IDataset)pFeature.Class;10             IWorkspaceEdit pWorkspaceEdit = (IWorkspaceEdit)pDataset.Workspace;11             if (!pWorkspaceEdit.IsBeingEdited())12             {13                 System.Windows.Forms.MessageBox.Show("This feature is in a layer not in edit mode. \nEdit cannot be made.Start edit and try again.",14                     "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);15             }16 17             // If all tests succeed allow feature edits to be saved 18             pWorkspaceEdit.StartEditOperation();19             pFeature.Shape = pGeometry;20             pFeature.Store();21             pWorkspaceEdit.StopEditOperation();22         }

5.屏幕坐标转换为地图坐标

 1         /// <summary> 2 /// 屏幕坐标转换为地图坐标 3 /// </summary> 4 /// <param name="pActiveView">地图</param> 5 /// <param name="pixelUnits">屏幕坐标</param> 6 /// <returns>地图坐标</returns> 7         private double ConvertPixelsToMapUnits(IActiveView pActiveView, double pixelUnits) 8         { 9             // Uses the ratio of the size of the map in pixels to map units to do the conversion 10             IPoint p1 = pActiveView.ScreenDisplay.DisplayTransformation.VisibleBounds.UpperLeft;11             IPoint p2 = pActiveView.ScreenDisplay.DisplayTransformation.VisibleBounds.UpperRight;12             int x1, x2, y1, y2;13             pActiveView.ScreenDisplay.DisplayTransformation.FromMapPoint(p1, out x1, out y1);14             pActiveView.ScreenDisplay.DisplayTransformation.FromMapPoint(p2, out x2, out y2);15             double pixelExtent = x2 - x1;16             double realWorldDisplayExtent = pActiveView.ScreenDisplay.DisplayTransformation.VisibleBounds.Width;17             double sizeOfOnePixel = realWorldDisplayExtent / pixelExtent;18             return pixelUnits * sizeOfOnePixel;19         }

6.处理地图控件上的目标按下事件

1         private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e) 2         { 3             //首先判断当前用户选择了何种任务，并去完成相应的任务；如果没有选择任何任务， 4 //即cboTasks的选项为没有任务时，该事件处理程序用于放大、缩小地图，鼠标左键 5 //用于放大，其他键用于缩小 6             m_pMap.ClearSelection();//清除地图中已选的要素 7              8             if (m_bSketching) 9             {10                 //新建要素任务处理11                 SketchMouseDown(e.x, e.y);12             }13             else if (m_bSelecting)14             {15                 //选择要素任务处理16                 SelectMouseDown(e.x, e.y);17             }18             else if (m_bEditingFtr)19             {20                 //编辑要素任务处理21                 EditFeature(e.x, e.y);22             }23             else if (m_bMove)24             {25                 //移动要素26                 MoveFeatureMouseDown(e.x, e.y);27             }28             else29             {30                 // Zoom in/out depending on which button was pressed 31                 IActiveView pActiveView = (IActiveView)m_pMap;32                 IEnvelope pEnvelope = pActiveView.Extent;33                 ESRI.ArcGIS.Geometry.Point pnt = new ESRI.ArcGIS.Geometry.Point();34                 IPoint iPnt = pnt;35                 iPnt.X = e.mapX;36                 iPnt.Y = e.mapY;37                 pEnvelope.CenterAt(iPnt);38                 if (e.button == 1) // left button 39                 {40                     //放大视图41                     pEnvelope.Expand(0.5, 0.5, true);42                 }43                 else44                 {45                     //缩小视图46                     pEnvelope.Expand(2, 2, true);47                 }48                 pActiveView.Extent = pEnvelope;49                 pActiveView.Refresh();50             } 51 52         }

7.处理地图控件上的鼠标移动事件

 1         private void axMapControl1_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e) 2         { 3             if (m_bSketching) 4             { 5                 //新建要素任务处理 6                 SketchMouseMove(e.x, e.y); 7             } 8             else if (m_bEditingFtr) 9             {10                 //编辑要素任务处理11                 FtrEditMouseMove(e.x, e.y);12             }13             else if (m_bMove)14             {15                 //移动要素任务处理16                 MoveFeatureMouseMove(e.x, e.y);17             }18 19         }

8.处理地图控件上的鼠标按下事件

 1         private void axMapControl1_OnMouseUp(object sender, IMapControlEvents2_OnMouseUpEvent e) 2         { 3             if (m_bEditingFtr) 4             { 5                 //结束编辑任务 6                 EndFtrEdit(e.x, e.y); 7             } 8             else if (m_bMove) 9             {10                 //结束移动要素任务11                 MoveFeatureEnd();12             }13 14         }

9.新建对象方法：当前图层为点图层时，每调用一次就新点一个点对象，当前图层为线图层或面图层时，第一次调用开始新建对象，并添加当前点，以后每调用一次，即向新对象中添加一个点,调用NewFeatureEnd方法完成对象创建 。

1         /// <summary> 2 /// 新建对象方法 3 /// 当前图层为点图层时，每调用一次就新点一个点对象 4 /// 当前图层为线图层或面图层时，第一次调用开始新建对象，并添加当前点， 5 /// 以后每调用一次，即向新对象中添加一个点,调用NewFeatureEnd方法完成对象创建 6 /// 在Map.MouseDown事件中调用本方法 7 /// </summary> 8 /// <param name="x">鼠标X坐标，屏幕坐标</param> 9 /// <param name="y">鼠标Y坐标，屏幕坐标</param>10         private void SketchMouseDown(int x, int y)11         {12             // Starts a new sketch or adds a point to an existing one, of a type 13 // determined by the current layer selected in the layers combo. 14 15 // Can only sketch on GeoFeature layers 16             if (m_pCurrentLayer == null)17             {18                 return;19             }20             if ((IGeoFeatureLayer)m_pCurrentLayer == null)21             {22                 return;23             }24 25             // Get the mouse down point in map coordinates 26             IFeatureLayer pFeatureLayer = (IFeatureLayer)m_pCurrentLayer;27             if (pFeatureLayer.FeatureClass == null)28             {29                 return;30             }31             IActiveView pActiveView = (IActiveView)m_pMap;32             IPoint pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);33 34             // if (this is a fresh sketch) create an appropriate feedback object, 35 // otherwise extent the existing feedback 36 // 如果是新开始创建的对象，则相应的创建一个新的Feedback对象；37 // 否则，向已存在的Feedback对象中加点38             if (!m_bInUse)39             {40                 m_pMap.ClearSelection();  //清除地图选中对象41                 switch (pFeatureLayer.FeatureClass.ShapeType)42                 {43                     case esriGeometryType.esriGeometryPoint:44                         CreateFeature(pPoint);45                         break;46                     case esriGeometryType.esriGeometryMultipoint:47                         m_bInUse = true;48                         m_pFeedback = new NewMultiPointFeedback();49                         INewMultiPointFeedback pMPFeed = (INewMultiPointFeedback)m_pFeedback;50                         m_pPointCollection = new Multipoint();51                         pMPFeed.Start(m_pPointCollection, pPoint);52                         break;53                     case esriGeometryType.esriGeometryPolyline:54                         m_bInUse = true;55                         m_pFeedback = new NewLineFeedback();56                         INewLineFeedback pLineFeed = (INewLineFeedback)m_pFeedback;57                         pLineFeed.Start(pPoint);58                         break;59                     case esriGeometryType.esriGeometryPolygon:60                         m_bInUse = true;61                         m_pFeedback = new NewPolygonFeedback();62                         INewPolygonFeedback pPolyFeed = (INewPolygonFeedback)m_pFeedback;63                         pPolyFeed.Start(pPoint);64                         break;65                 }66                 if (m_pFeedback != null)67                 {68                     m_pFeedback.Display = pActiveView.ScreenDisplay;69                 }70             }71             else72             {73                 if (m_pFeedback is INewMultiPointFeedback)74                 {75                     object Missing = Type.Missing;76                     m_pPointCollection.AddPoint(pPoint, ref Missing, ref Missing);77                 }78                 else if (m_pFeedback is INewLineFeedback)79                 {80                     INewLineFeedback pLineFeed = (INewLineFeedback)m_pFeedback;81                     pLineFeed.AddPoint(pPoint);82                 }83                 else if (m_pFeedback is INewPolygonFeedback)84                 {85                     INewPolygonFeedback pPolyFeed = (INewPolygonFeedback)m_pFeedback;86                     pPolyFeed.AddPoint(pPoint);87                 }88             }89         }

10.新建对象过程中鼠标移动方法,产生Track效果，在Map.MouseMove事件中调用本方法

 1         /// <summary> 2 /// 新建对象过程中鼠标移动方法,产生Track效果 3 /// 在Map.MouseMove事件中调用本方法 4 /// </summary> 5 /// <param name="x">鼠标X坐标，屏幕坐标</param> 6 /// <param name="y">鼠标Y坐标，屏幕坐标</param> 7         private void SketchMouseMove(int x, int y) 8         { 9             if (!m_bInUse || m_pFeedback == null)10             {11                 return;12             }13 14             // Move the feedback envelope and store the current mouse position 15             IActiveView pActiveView = (IActiveView)m_pMap;16             m_pFeedback.MoveTo(pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y));17             m_pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);18         }

11.完成新建对象，取得绘制的对象，并添加到图层中 ：建议在Map.DblClick或Map.MouseDown(Button = 2)事件中调用本方法

 1         /// <summary> 2 /// 完成新建对象，取得绘制的对象，并添加到图层中 3 /// 建议在Map.DblClick或Map.MouseDown(Button = 2)事件中调用本方法 4 /// </summary> 5         private void EndSketch() 6         { 7             IGeometry pGeom = null; 8             IPointCollection pPointCollection = null; 9 10             // Create a new feature if possible 11             if (m_pFeedback is INewMultiPointFeedback)12             {13                 INewMultiPointFeedback pMPFeed = (INewMultiPointFeedback)m_pFeedback;14                 pMPFeed.Stop();15                 pGeom = (IGeometry)m_pPointCollection;16             }17             else if (m_pFeedback is INewLineFeedback)18             {19                 INewLineFeedback pLineFeed = (INewLineFeedback)m_pFeedback;20                 pLineFeed.AddPoint(m_pPoint);21                 IPolyline pPolyLine = pLineFeed.Stop();22                 pPointCollection = (IPointCollection)pPolyLine;23                 if (pPointCollection.PointCount < 2)24                     MessageBox.Show("至少输入两个节点.", "错误的线几何对象", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);25                 else26                     pGeom = (IGeometry)pPointCollection;27             }28             else if (m_pFeedback is INewPolygonFeedback)29             {30                 INewPolygonFeedback pPolyFeed = (INewPolygonFeedback)m_pFeedback;31                 pPolyFeed.AddPoint(m_pPoint);32                 IPolygon pPolygon = pPolyFeed.Stop();33                 if (pPolygon != null)34                     pPointCollection = (IPointCollection)pPolygon;35                 if (pPointCollection.PointCount < 3)36                     MessageBox.Show("至少输入三个节点.", "错误的线几何对象", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);37                 else38                     pGeom = (IGeometry)pPointCollection;39             }40             CreateFeature(pGeom);41             m_pFeedback = null;42             m_bInUse = false;43         }

12.查询当前图层中鼠标位置处的地图对象，建议在Map.MouseDown事件中调用本方法

 1         /// <summary> 2 /// 查询当前图层中鼠标位置处的地图对象 3 /// 建议在Map.MouseDown事件中调用本方法 4 /// </summary> 5 /// <param name="x">鼠标X坐标，屏幕坐标</param> 6 /// <param name="y">鼠标Y坐标，屏幕坐标</param> 7         private void SelectMouseDown(int x, int y) 8         { 9             // Searches the map for features at the given point in the current layer 10 // and selects them 11 12             m_pMap.ClearSelection();//清除地图中已选的要素13             if (m_pCurrentLayer == null)14             {15                 return;16             }17 18             if ((IGeoFeatureLayer)m_pCurrentLayer == null)19             {20                 return;21             }22 23             // Get the feature layer and class of the current layer 24             IFeatureLayer pFeatureLayer = (IFeatureLayer)m_pCurrentLayer;25             IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;26             if (pFeatureClass == null)27             {28                 return;29             }30 31             // Get the mouse down position in map coordinates 32             IActiveView pActiveView = (IActiveView)m_pMap;33             IPoint pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);34             IGeometry pGeometry = pPoint;35 36             // Use a four pixel buffer around the cursor for feature search 37 // 设置查询缓冲区38             double length = ConvertPixelsToMapUnits(pActiveView, 4);39             ITopologicalOperator pTopo = (ITopologicalOperator)pGeometry;40             IGeometry pBuffer = pTopo.Buffer(length);41             pGeometry = (IGeometry)pBuffer.Envelope;42 43             // up a Filter specific to this layer  44 //设置过滤器对象45             ISpatialFilter pSpatialFilter = new SpatialFilter();46             pSpatialFilter.Geometry = pGeometry;47             switch (pFeatureClass.ShapeType)48             {49                 case esriGeometryType.esriGeometryPoint:50                     pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelContains;51                     break;52                 case esriGeometryType.esriGeometryPolyline:53                     pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelCrosses;54                     break;55                 case esriGeometryType.esriGeometryPolygon:56                     pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;57                     break;58             }59             pSpatialFilter.GeometryField = pFeatureClass.ShapeFieldName;60             IQueryFilter pFilter = pSpatialFilter;61 62             // Do the search 63 // 查询64             IFeatureCursor pCursor = pFeatureLayer.Search(pFilter, false);65 66             // and select the features on the map 67 // 在地图上高亮显示查询结果68             IFeature pFeature = pCursor.NextFeature();69             while (pFeature != null)70             {71                 m_pMap.SelectFeature(m_pCurrentLayer, pFeature);72                 pFeature = pCursor.NextFeature();73             }74             pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);75         }

13.编辑当前图层中鼠标击中的地图对象(开始编辑), 如果为点对象，可进行位置移动，如果为线对象或面对象，可进行节点编辑 ： 建议在Map.MouseDown事件中调用本方法

  1         /// <summary>  2 /// 编辑当前图层中鼠标击中的地图对象(开始编辑),  3 /// 如果为点对象，可进行位置移动，如果为线对象或面对象，可进行节点编辑  4 /// 建议在Map.MouseDown事件中调用本方法  5 /// </summary>  6 /// <param name="x">鼠标X坐标，屏幕坐标</param>  7 /// <param name="y">鼠标Y坐标，屏幕坐标</param>  8 /// <returns></returns>  9         private void EditFeature(int x, int y) 10         { 11             // Searches for features under the coordinate provided and starts an edit  12 // operation on the first one found.  13             IPoint pHitPoint = null; 14             double hitDist = 0; 15             int partIndex = 0; 16             int vertexIndex = 0; 17             int vertexOffset = 0; 18             bool vertex = false; 19  20             // Use the first feature in the selection  21 // 取得鼠标击中的第一个对象 22             SelectMouseDown(x, y); 23             IEnumFeature pSelected = (IEnumFeature)m_pMap.FeatureSelection; 24             IFeature pFeature = pSelected.Next(); 25             if (pFeature == null) 26             { 27                 return; 28             } 29  30             IActiveView pActiveView = (IActiveView)m_pMap; 31             IPoint pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y); 32  33             // Tolerance in pixels for line hits  34 // 节点空间查询容差 35             double tol = ConvertPixelsToMapUnits(pActiveView, 4); 36  37             // The feedback action / edit action depends on the geometry type  38 // and the location of point within the geometry  39             IGeometry pGeom = pFeature.Shape; 40             IObjectClass pObjectClass = pFeature.Class; 41             m_pEditFeature = pFeature; 42  43             switch (pGeom.GeometryType) 44             { 45                 case esriGeometryType.esriGeometryPoint: 46                     m_pFeedback = new MovePointFeedback(); 47                     m_pFeedback.Display = pActiveView.ScreenDisplay; 48                     IMovePointFeedback pPointMove = (IMovePointFeedback)m_pFeedback; 49                     pPointMove.Start((IPoint)pGeom, pPoint); 50                     break; 51  52                 case esriGeometryType.esriGeometryPolyline: 53                     if (TestGeometryHit(tol, pPoint, pFeature, ref pHitPoint, ref hitDist, 54                         ref partIndex, ref vertexIndex, ref vertexOffset, ref vertex)) 55                     { 56                         if (!vertex) 57                         { 58                             // Get the path, add a point to it and vertex edit that newly added point  59                             IGeometryCollection pGeomColn = (IGeometryCollection)pGeom; 60                             IPath pPath = (IPath)pGeomColn.get_Geometry(partIndex); 61                             IPointCollection pPointColn = (IPointCollection)pPath; 62                             long numVertices = pPointColn.PointCount; 63  64                             object Missing = Type.Missing; 65                             object val; 66                             if (vertexIndex == 0) 67                             { 68                                 val = 1; 69                                 pPointColn.AddPoint(pPoint, ref val, ref Missing); 70                             } 71                             else 72                             { 73                                 val = vertexIndex; 74                                 pPointColn.AddPoint(pPoint, ref Missing, ref val); 75                             } 76  77                             // Reset the index pointer to the new index  78                             TestGeometryHit(tol, pPoint, pFeature, ref pHitPoint, ref hitDist, ref partIndex, ref vertexIndex, ref vertexOffset, ref vertex); 79                         } 80                         m_pFeedback = new LineMovePointFeedback(); 81                         m_pFeedback.Display = pActiveView.ScreenDisplay; 82                         ILineMovePointFeedback pLineMove = (ILineMovePointFeedback)m_pFeedback; 83                         pLineMove.Start((IPolyline)pGeom, vertexIndex, pPoint); 84                     } 85                     else 86                     { 87                         return; 88                     } 89                     // 90                     break; 91  92                 case esriGeometryType.esriGeometryPolygon: 93                     if (TestGeometryHit(tol, pPoint, pFeature, ref pHitPoint, ref hitDist, 94                         ref partIndex, ref vertexIndex, ref vertexOffset, ref vertex)) 95                     { 96                         if (!vertex) 97                         { 98                             // Get the path, add a point to it and vertex edit that newly added point  99                             IGeometryCollection pGeomColn = (IGeometryCollection)pGeom;100                             IPath pPath = (IPath)pGeomColn.get_Geometry(partIndex);101                             IPointCollection pPointColn = (IPointCollection)pPath;102                             long numVertices = pPointColn.PointCount;103 104                             // Rethe index pointer to the new index 105                             object Missing = Type.Missing;106                             object val;107                             if (vertexIndex == 0)108                             {109                                 val = 1;110                                 pPointColn.AddPoint(pPoint, ref val, ref Missing);111                             }112                             else113                             {114                                 val = vertexIndex;115                                 pPointColn.AddPoint(pPoint, ref Missing, ref val);116                             }117 118                             // Reset the index pointer to the new index 119                             TestGeometryHit(tol, pPoint, pFeature, ref pHitPoint, ref hitDist, ref partIndex, ref vertexIndex, ref vertexOffset, ref vertex);120                         }121                         m_pFeedback = new PolygonMovePointFeedback();122                         m_pFeedback.Display = pActiveView.ScreenDisplay;123                         IPolygonMovePointFeedback pPolyMove = (IPolygonMovePointFeedback)m_pFeedback;124                         pPolyMove.Start((IPolygon)pGeom, vertexIndex + vertexOffset, pPoint);125                     }126                     else127                         return;128                     break;129             }130 131             return;132         }

14.编辑地图对象过程中的鼠标移动事件, 如果为点对象，进行位置移动；如果为线对象或面对象，进行节点移动：建议在Map.MouseMove事件中调用本方法

 1         /// <summary> 2 /// 编辑地图对象过程中的鼠标移动事件, 3 /// 如果为点对象，进行位置移动 4 /// 如果为线对象或面对象，进行节点移动 5 /// 建议在Map.MouseMove事件中调用本方法 6 /// </summary> 7 /// <param name="x">鼠标X坐标，屏幕坐标</param> 8 /// <param name="y">鼠标Y坐标，屏幕坐标</param> 9         private void FtrEditMouseMove(int x, int y)10         {11             // Moves the edit feedback object along with the mouse. 12             if (m_pFeedback == null)13             {14                 return;15             }16 17             IActiveView pActiveView = (IActiveView)m_pMap;18             IPoint pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);19             m_pFeedback.MoveTo(pPoint);20         }

15.结束feature的编辑

 1         /// <summary> 2 /// 结束feature的编辑 3 /// </summary> 4 /// <param name="x"></param> 5 /// <param name="y"></param> 6         private void EndFtrEdit(int x, int y) 7         { 8             // Uses the feedback object//s geometry to rethe geometry on the feature  9 // being edited. 10 11 // if (no feedback no edit 12             if (m_pFeedback == null)13             {14                 return;15             }16 17             IActiveView pActiveView = (IActiveView)m_pMap;18             IPoint pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);19 20             if (m_pFeedback is IMovePointFeedback)21             {22                 IMovePointFeedback pPointMove = (IMovePointFeedback)m_pFeedback;23                 IGeometry pGeometry = pPointMove.Stop();24                 UpdateFeature(m_pEditFeature, pGeometry);25             }26             else if (m_pFeedback is ILineMovePointFeedback)27             {28                 ILineMovePointFeedback pLineMove = (ILineMovePointFeedback)m_pFeedback;29                 IGeometry pGeometry = pLineMove.Stop();30                 UpdateFeature(m_pEditFeature, pGeometry);31             }32             else if (m_pFeedback is IPolygonMovePointFeedback)33             {34                 IPolygonMovePointFeedback pPolyMove = (IPolygonMovePointFeedback)m_pFeedback;35                 IGeometry pGeometry = pPolyMove.Stop();36                 UpdateFeature(m_pEditFeature, pGeometry);37             }38 39             m_pFeedback = null;40             pActiveView.Refresh();41         }

16.移动当前图层中鼠标击中地图对象的位置（开始移动）：建议在Map.MouseDown事件中调用本方法

 1         /// <summary> 2 /// 移动当前图层中鼠标击中地图对象的位置（开始移动） 3 /// 建议在Map.MouseDown事件中调用本方法 4 /// </summary> 5 /// <param name="x">鼠标X坐标，屏幕坐标</param> 6 /// <param name="y">鼠标Y坐标，屏幕坐标</param> 7 /// <returns></returns> 8         public bool MoveFeatureMouseDown(int x, int y) 9         {10             try11             {12                 m_pMap.ClearSelection();13 14                 SelectMouseDown(x, y);15                 IEnumFeature pSelected = (IEnumFeature)m_pMap.FeatureSelection;16                 IFeature pFeature = pSelected.Next();17                 if (pFeature == null) return false;18 19                 IActiveView pActiveView = (IActiveView)m_pMap;20                 IPoint pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);21 22                 IGeometry pGeom = pFeature.Shape;23                 m_pEditFeature = pFeature;24 25                 switch (pGeom.GeometryType)26                 {27                     case esriGeometryType.esriGeometryPoint:28                         m_pFeedback = new MovePointFeedbackClass();29                         m_pFeedback.Display = pActiveView.ScreenDisplay;30                         IMovePointFeedback pPointMove = (IMovePointFeedback)m_pFeedback;31                         pPointMove.Start((IPoint)pGeom, pPoint);32                         break;33                     case esriGeometryType.esriGeometryPolyline:34 35                         m_pFeedback = new MoveLineFeedbackClass();36                         m_pFeedback.Display = pActiveView.ScreenDisplay;37                         IMoveLineFeedback pLineMove = (IMoveLineFeedback)m_pFeedback;38                         pLineMove.Start((IPolyline)pGeom, pPoint);39                         break;40                     case esriGeometryType.esriGeometryPolygon:41                         m_pFeedback = new MovePolygonFeedbackClass();42                         m_pFeedback.Display = pActiveView.ScreenDisplay;43                         IMovePolygonFeedback pPolyMove = (IMovePolygonFeedback)m_pFeedback;44                         pPolyMove.Start((IPolygon)pGeom, pPoint);45                         break;46                 }47                 return true;48             }49             catch (Exception e)50             {51                 Console.WriteLine(e.Message.ToString());52                 return false;53             }54         }

17.移动地图对象过程中的鼠标移动事件：建议在Map.MouseMove事件中调用本方法

 1         /// <summary> 2 /// 移动地图对象过程中的鼠标移动事件 3 /// 建议在Map.MouseMove事件中调用本方法 4 /// </summary> 5 /// <param name="x">鼠标X坐标，屏幕坐标</param> 6 /// <param name="y">鼠标Y坐标，屏幕坐标</param> 7         public void MoveFeatureMouseMove(int x, int y) 8         { 9             try10             {11                 if (m_pFeedback == null) return;12 13                 IActiveView pActiveView = (IActiveView)m_pMap;14                 IPoint pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(x, y);15                 m_pFeedback.MoveTo(pPoint);16             }17             catch (Exception e)18             {19                 Console.WriteLine(e.Message.ToString());20             }21         }

18.完成地图对象移动，取得移动后的对象，并将其更新到图层中：建议在Map.MouseUp事件中调用本方法

 1         /// <summary> 2 /// 完成地图对象移动，取得移动后的对象，并将其更新到图层中 3 /// 建议在Map.MouseUp事件中调用本方法 4 /// </summary> 5         public void MoveFeatureEnd() 6         { 7             IGeometry pGeometry; 8  9             try10             {11                 if (m_pFeedback == null) return;12 13                 if (m_pFeedback is IMovePointFeedback)14                 {15                     IMovePointFeedback pPointMove = (IMovePointFeedback)m_pFeedback;16                     pGeometry = pPointMove.Stop();17                     UpdateFeature(m_pEditFeature, pGeometry);18                 }19                 else if (m_pFeedback is IMoveLineFeedback)20                 {21                     IMoveLineFeedback pLineMove = (IMoveLineFeedback)m_pFeedback;22                     pGeometry = pLineMove.Stop();23                     UpdateFeature(m_pEditFeature, pGeometry);24                 }25                 else if (m_pFeedback is IMovePolygonFeedback)26                 {27                     IMovePolygonFeedback pPolyMove = (IMovePolygonFeedback)m_pFeedback;28                     pGeometry = pPolyMove.Stop();29                     UpdateFeature(m_pEditFeature, pGeometry);30                 }31 32                 m_pFeedback = null;33                 IActiveView pActiveView = (IActiveView)m_pMap;34                 pActiveView.Refresh();35             }36             catch (Exception e)37             {38                 Console.WriteLine(e.Message.ToString());39             }40         }

总结：终于结束了，感觉通过可视化来编辑空间数据需要做太多的工作，上面把要做的工作几乎都秒到了，至于具体流程这个只需要简单组织一下逻辑就可以了。更强大的空间数据编辑功能有待于我们更加活跃的思维去创造！OK！今天就到这里了吧！情人节已过，各位coder们赶快回来编程吧！