ArcEngine代码整理（2）

1. 获取Map中选择的元素（Element）

View Code

IGraphicsContainer m_GraphicsContainer =axMapControl1.Map as IGraphicsContainer;
            m_GraphicsContainer.Reset();
            IGraphicsContainerSelect pGraphicSelect = m_GraphicsContainer as IGraphicsContainerSelect;
            //pGraphicSelect.SelectedElements.Reset();
            int a = pGraphicSelect.ElementSelectionCount;
            IEnumElement m_EnumEle=pGraphicSelect.SelectedElements;
            m_EnumEle.Reset();
            IElement m_Element = m_EnumEle.Next();
            IElementProperties m_ElementProperties = m_Element as IElementProperties;
            while (m_Element != null)
            {
                comboBox1.SelectedItem = m_ElementProperties.Name;
                propertyGrid1.SelectedObject = (Stra)m_ElementProperties.CustomProperty;
                m_Element = m_EnumEle.Next();
                m_ElementProperties = m_Element as IElementProperties;
            }

2. 获取MapControl中选择的要素（Feature）

View Code

IMap m_Map = pMapCtrl.Map;

            ESRI.ArcGIS.esriSystem.IUID uid = new ESRI.ArcGIS.esriSystem.UIDClass();



            uid.Value = "{E156D7E5-22AF-11D3-9F99-00C04F6BC78E}";



            ESRI.ArcGIS.Carto.IEnumLayer enumLayer = m_Map.get_Layers(((ESRI.ArcGIS.esriSystem.UID)(uid)), true);

            enumLayer.Reset();

            ESRI.ArcGIS.Carto.ILayer layer = enumLayer.Next();

            int j = -1;

            IFeatureLayer pCurrentLyr = null;

            while (!(layer == null))

            {

                j++;

                if (layer.Name == "Holes")

                {

                    pCurrentLyr = layer as IFeatureLayer;

                    break;

                }

                layer = enumLayer.Next();

            }

            IQueryFilter queryFilter = new QueryFilterClass();

            IFeatureSelection pFeatSelection = pCurrentLyr as IFeatureSelection;

            ISelectionSet selectionSet = pFeatSelection.SelectionSet;



            ICursor cursor = null;

                selectionSet.Search(queryFilter, true, out cursor);



            IFeatureCursor featureCursor = cursor as IFeatureCursor;

            IFeature feature;

            int i = 0;

            string holeid="";

            while ((feature = featureCursor.NextFeature()) != null)

            {

                if (i==0)

                {

                   holeid= feature.get_Value(2).ToString();

                   break;

                }

                

            }

 3. 打开AccessWorkspaceFactory中的栅格数据集

View Code

 1                 string strFeatName = pFeatDlg.FileName;//自己定义的对话框
 2                 IWorkspaceFactory m_WorkspaceFactory = new AccessWorkspaceFactory();
 3                 IWorkspace m_Workspce = m_WorkspaceFactory.OpenFromFile(MineFrm.m_WorkspacePath, 0);
 4                 IRasterWorkspaceEx m_RasterWorkspace = m_Workspce as IRasterWorkspaceEx;//Access工作空间需要用这个接口跳转
 5                 IRasterDataset pRasterDataset = null;
 6                 pRasterDataset = m_RasterWorkspace.OpenRasterDataset(strFeatName);
 7                 IRasterLayer pRasterLayer = new RasterLayerClass();
 8                 pRasterLayer.CreateFromDataset(pRasterDataset);
 9                 ILayer player = pRasterLayer as ILayer;
10                 player.Name = pRasterLayer.Name;
11                 map = axMapControl1.Map;
12                 map.AddLayer(player);

4. 获取栅格类型的Surface

首先定义一个UIDClass：

ESRI.ArcGIS.esriSystem.IUID uid2 = new ESRI.ArcGIS.esriSystem.UIDClass();

 uid2.Value = "{D02371C7-35F7-11D2-B1F2-00C04F8EDEFF}" ;//= IRasterLayer

View Code

 1             IRasterLayer m_RasterLayer=null;
 2             ESRI.ArcGIS.Carto.IEnumLayer enumLayer = m_Map.get_Layers(((ESRI.ArcGIS.esriSystem.UID)(uid2)), true); // Explicit Cast 
 3             enumLayer.Reset();
 4             ESRI.ArcGIS.Carto.ILayer layer = enumLayer.Next();
 5             int i = -1;
 6                     
 7             while (!(layer == null))
 8             {                      
 9                 i++;
10                 if (i == listSruface.SelectedIndex)//这里是为了获取ListBox中选择项对应的图层，不在通过图层名称获取图层，通过遍历添加，再遍历选择
11                  {
12                      m_RasterLayer = layer as IRasterLayer;
13                  }
14 
15                  layer = enumLayer.Next();
16             }
17             IRasterSurface m_RasterSurface = new RasterSurfaceClass();
18                     MessageBox.Show(m_RasterLayer.BandCount.ToString());
19                     //m_RasterSurface.PutRaster(m_RasterLayer.Raster, 0);
20                     IRasterBandCollection pBands;
21                     pBands = m_RasterLayer.Raster as IRasterBandCollection;
22                     m_RasterSurface.RasterBand = pBands.Item(0);
23 
24                     ISurface m_Surface = m_RasterSurface as ISurface;
25                     IGeometry pGeoPolyline;
26                     m_Surface.InterpolateShape(m_CutLine as IGeometry, out pGeoPolyline, ref mis);
27                     IPolyline pPolyline = pGeoPolyline as IPolyline;
28                     IGraphicsContainer pGraphicContainer = m_PreViewMapCtrl.ActiveView as IGraphicsContainer;
29                     ISimpleLineSymbol pSimpleLineSymbol = new SimpleLineSymbolClass();
30                     pSimpleLineSymbol.Width = 1;
31                     pSimpleLineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
32                     IColor pColor = ColorAndIcolor.ConvertColorToIColor(Color.Red);
33                     pSimpleLineSymbol.Color = pColor;
34                     IElement pEleAxisX = null;//X轴线
35                     ILineElement pLineEleX = new LineElementClass();
36                     pLineEleX.Symbol = pSimpleLineSymbol;
37                     pEleAxisX = pLineEleX as IElement;
38                     pEleAxisX.Geometry = pPolyline;
39                     pGraphicContainer.AddElement(pEleAxisX, 0);
40                     m_PreViewMapCtrl.Extent = pGeoPolyline.Envelope;
41                     m_PreViewMapCtrl.ActiveView.Refresh();

 5.从FeatureClass中读取要素IFeature

View Code

IList<IPolyline> m_Polylines = new List<IPolyline>();//存放线要素

            IQueryFilter pQueryFilter = new QueryFilterClass();

            //pQueryFilter.SubFields = "LineId,Shape,StartPointId,EndPointId";      //过滤字段

            //  .WhereClause = "SUBTYPE = 'INDSTL'"

            IFeatureCursor pCur = m_FeatSelect.Search(null, false);//查找字段

            int iLineTypeIndex = m_FeatSelect.FindField("Type");

            IFeature pFeat = pCur.NextFeature();

            int show = 0;



            while (pFeat != null)

            {

                show++;

                if (double.Parse(pFeat.get_Value(iLineTypeIndex).ToString())>0)

                {

                    IPolyline pPoline = pFeat.Shape as IPolyline;

                     m_Polylines.Add(pPoline);

                }

                

                pFeat = pCur.NextFeature();

            }

 6.读取ITable中的IRow

View Code

 1 IQueryFilter pQueryFilter = new QueryFilterClass();

 2                 pQueryFilter.WhereClause = sFinallySql;

 3                 //int i = m_Table.RowCount(pQueryFilter);

 4                 //MessageBox.Show(i.ToString());

 5                 pList = new List<Rooms>();

 6                 ICursor pcur = m_Table.Search(pQueryFilter, true);

 7                 IRow pRow = pcur.NextRow();

 8                 

 9                 while (pRow != null)

10                 {

11                     int k = pRow.Fields.FieldCount;

12                     Rooms m_Room = new Rooms();

13                     m_Room.RoomId = pRow.get_Value(roomidIndex).ToString();

14                     m_Room.RoomName = pRow.get_Value(roomNameIndex).ToString();

15                     m_Room.RoonEnglish = pRow.get_Value(engIndex).ToString();

16                     m_Room.Deprt = pRow.get_Value(deaprtIndex).ToString();

17                     m_Room.RoomType = pRow.get_Value(typeIndex).ToString();

18                     m_Room.Useage = pRow.get_Value(usageIndex).ToString();

19                     m_Room.LocationSchool = pRow.get_Value(localIndex).ToString();

20                     if (pRow.get_Value(areaIndex).ToString() != null && pRow.get_Value(areaIndex).ToString() != "")

21                     {

22                         m_Room.Area_1 = double.Parse(pRow.get_Value(areaIndex).ToString());

23                     }

24                    

25                     m_Room.User_1 = pRow.get_Value(userIndex).ToString();

26                     pList.Add(m_Room);    

27                     pRow = pcur.NextRow();

28                 }

29                 dataGridView1.DataSource = pList;

30                 for (int i = 0; i < dataGridView1.Columns.Count; i++)

31                     dataGridView1.Columns[i].HeaderText = plistheader[i];