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本节书摘来自异步社区《ArcGIS Engine 地理信息系统开发从入门到精通（第二版）》一书中的第6章，第6.6节,作者： 邱洪钢 , 张青莲 , 熊友谊 更多章节内容可以访问云栖社区“异步社区”公众号查看。
ArcGIS Engine 地理信息系统开发从入门到精通（第二版）
6.6.1 空间数据库连接空间数据库企业级Geodatabase的连接主要是使用IworkspaceFactory、Iworkspace和IpropertySet等3个接口，通过IPropertySet 设置数据库的连接属性，由IworkspaceFactory创建一个IWorkspace的接口指针并返回该指针。6.6.3小节的代码演示了如何进行空间数据库的连接。6.6.2 创建新的数据集
数据集是由一组具有相同空间参考的要素类组成，用于存放数据。创建新的数据集主要使用IWorkspace、IFeatureWorkspace、IfeatureDataset和IspatialReference等4个接口，其中，IWorkspace用于生成IFeatureWorkspace，ISpatialReference用于设置要素数据集的空间参考属性（该属性为可选属性），整个过程返回IFeatureDataset接口指针，即新生成的要素数据集。6.6.3 空间数据的入库
下面代码使用SDE空间数据库，因此ArcEngine的Lisence应使用企业数据库类型，在Form1_Load事件中初始化lisence，不能使用lisence控件设置，否则提示没有许可lisence。private void Form1_Load(object sender, EventArgs e) { IAoInitialize pao = new AoInitializeClass(); pao.Initialize(esriLicenseProductCode.esriLicenseProductCodeEngineGeoDB); } // 工作空间 IWorkspace workspace; //矢量数据工作空间 IFeatureWorkspace featureWorkspace; //影像数据工作空间 IRasterWorkspaceEx rasterWorkspace; //矢量数据集 IFeatureDataset featureDataset; //影像数据集 IRasterDataset rasterDataset; private void button1_Click(object sender, EventArgs e) { // SDE空间连接属性 IPropertySet propertySet = new PropertySetClass(); propertySet.SetProperty("server", this.textBox1.Text ); propertySet.SetProperty("instance",this.textBox2.Text ); propertySet.SetProperty ("database",this.textBox3.Text ); propertySet.SetProperty("user", this.textBox4.Text ); propertySet.SetProperty ("password",this.textBox5.Text ); propertySet.SetProperty("version", "SDE.DEFAULT"); IWorkspaceFactory workspaceFactory = new SdeWorkspaceFactory(); //打开SDE工作空间 workspace = workspaceFactory.Open(propertySet, 0); MessageBox.Show("连接SDE空间数据库成功"); } //创建数据集（矢量数据集和影像数据集） private void button2_Click(object sender, EventArgs e) { featureWorkspace =workspace as IFeatureWorkspace ; rasterWorkspace = workspace as IRasterWorkspaceEx; //定义空间参考 ISpatialReferenceFactory spatialReferenceFactory = new SpatialReference EnvironmentClass(); ISpatialReference spatialReference = spatialReferenceFactory. CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_Beijing1954); spatialReference.SetDomain(-1000, -1000, 1000, 1000); IEnumDatasetName enumDatasetName; IDatasetName datasetName; string dsName = ""; enumDatasetName = workspace.get_DatasetNames(esriDatasetType.esriDTFeature Dataset); datasetName = enumDatasetName.Next(); bool isExist = false; //创建矢量数据集 dsName = "SDE."+this.textBox6.Text; while (datasetName != null) { if (datasetName.Name == dsName) { isExist = true; } datasetName = enumDatasetName.Next(); } if (isExist ==false ) { featureDataset = featureWorkspace.CreateFeatureDataset(this. textBox6.Text, spatialReference); } //创建影像数据集 isExist = false; enumDatasetName = workspace.get_DatasetNames(esriDatasetType.esriDTRaster Dataset ); datasetName = enumDatasetName.Next(); dsName = "SDE." + this.textBox6.Text; while (datasetName != null) { if (datasetName.Name == dsName) { isExist = true; } datasetName = enumDatasetName.Next(); } if (isExist == false) { //设置存储参数 IRasterStorageDef rasterStorageDef = new RasterStorageDefClass(); rasterStorageDef.CompressionType = esriRasterCompressionType. esriRasterCompressionUncompressed; rasterStorageDef.PyramidLevel = 1; rasterStorageDef.PyramidResampleType = rstResamplingTypes.RSP_ BilinearInterpolation; rasterStorageDef.TileHeight = 128; rasterStorageDef.TileWidth = 128; //设置坐标系统 IRasterDef rasterDef = new RasterDefClass(); ISpatialReference rasterDpatialRefrence = new UnknownCoordinateSystem Class(); rasterDef.SpatialReference = rasterDpatialRefrence; IGeometryDef geometryDef = new GeometryDefClass(); IGeometryDefEdit geometryDefedit = (IGeometryDefEdit)geometryDef; geometryDefedit.AvgNumPoints_2 = 5; geometryDefedit.GridCount_2 = 1; geometryDefedit.set_GridSize(0, 1000); geometryDefedit.GeometryType_2 = esriGeometryType.esriGeometry Polygon; ISpatialReference spatialReference2 = new UnknownCoordinateSystem Class(); geometryDefedit.SpatialReference_2 = spatialReference2; rasterDataset = rasterWorkspace.CreateRasterDataset(this.textBox7. Text, 1, rstPixelType.PT_LONG, rasterStorageDef, "DEFAULTS", rasterDef, geometry Def); } } //加载矢量数据到SDE数据库 private void button3_Click(object sender, EventArgs e) { featureWorkspace = workspace as IFeatureWorkspace; this.openFileDialog1.Filter = "shp file (*.shp)|*.shp"; this.openFileDialog1.Title = "打开矢量数据"; this.openFileDialog1.Multiselect = false; string fileName = ""; if (this.openFileDialog1.ShowDialog() == DialogResult.OK) { fileName = this.openFileDialog1.FileName; string filepath; string file; int lastIndex; lastIndex = fileName.LastIndexOf(@"\"); filepath = fileName.Substring(0, lastIndex ); file = fileName.Substring(lastIndex+1); //读取SHP数据 IWorkspaceFactory shpwpf = new ShapefileWorkspaceFactoryClass(); IWorkspace shpwp = shpwpf.OpenFromFile(filepath, 0); IFeatureWorkspace shpfwp = shpwp as IFeatureWorkspace; IFeatureClass shpfc = shpfwp.OpenFeatureClass(file); //导入SDE数据库 IFeatureClass sdeFeatureClass=null; IFeatureClassDescription featureClassDescription = new FeatureClass DescriptionClass(); IObjectClassDescription objectClassDescription = featureClassDescription as IObjectClassDescription; IFields fields = shpfc.Fields; IFieldChecker fieldChecker = new FieldCheckerClass(); IEnumFieldError enumFieldError = null; IFields validateFields = null; fieldChecker.ValidateWorkspace = featureWorkspace as IWorkspace; fieldChecker.Validate(fields, out enumFieldError, out validateFields); featureDataset = featureWorkspace.OpenFeatureDataset(this.textBox6.Text); try { sdeFeatureClass = featureWorkspace.OpenFeatureClass(shpfc.Alias Name); } catch (Exception ex) { } //在SDE数据库中创建矢量数据集 if (sdeFeatureClass == null) { sdeFeatureClass = featureDataset.CreateFeatureClass(shpfc. AliasName, validateFields,objectClassDescription.InstanceCLSID,objectClassDescription. ClassExtensionCLSID, shpfc.FeatureType, shpfc.ShapeFieldName, ""); } IFeatureCursor featureCursor = shpfc.Search(null, true); IFeature feature = featureCursor.NextFeature(); IFeatureCursor sdeFeatureCursor= sdeFeatureClass.Insert(true); IFeatureBuffer sdeFeatureBuffer; //添加实体对象 while (feature != null) { sdeFeatureBuffer = sdeFeatureClass.CreateFeatureBuffer(); IField shpField = new FieldClass(); IFields shpFields = feature.Fields; for (int i = 0; i < shpFields.FieldCount; i++) { shpField = shpFields.get_Field(i); int index = sdeFeatureBuffer.Fields.FindField(shpField.Name); if (index != -1) { sdeFeatureBuffer.set_Value(index, feature.get_Value(i)); } } sdeFeatureCursor.InsertFeature(sdeFeatureBuffer); sdeFeatureCursor.Flush(); feature = featureCursor.NextFeature(); } //加载数据到Mapcontrol IFeatureLayer sdeFeatureLayer = new FeatureLayerClass(); sdeFeatureLayer.FeatureClass = sdeFeatureClass; this.axMapControl1.Map.AddLayer(sdeFeatureLayer as ILayer); this.axMapControl1.Extent = this.axMapControl1.FullExtent; this.axMapControl1.Refresh(); } } //加载影像数据到SDE数据库 private void button4_Click(object sender, EventArgs e) { this.openFileDialog1.Filter = "TIFF file (*.tif)|*.tif"; this.openFileDialog1.Title = "打开影像数据"; this.openFileDialog1.Multiselect = false; string fileName = ""; if (this.openFileDialog1.ShowDialog() == DialogResult.OK) { fileName = this.openFileDialog1.FileName; string filepath; string file; int lastIndex; lastIndex = fileName.LastIndexOf(@"\"); filepath = fileName.Substring(0, lastIndex); file = fileName.Substring(lastIndex + 1); //导入SDE数据库 rasterWorkspace = workspace as IRasterWorkspaceEx; IWorkspaceFactory tifwpf = new RasterWorkspaceFactoryClass(); IWorkspace tifwp = tifwpf.OpenFromFile(filepath, 0); IRasterWorkspace tifrwp = tifwp as IRasterWorkspace; IRasterDataset rasterDataset = tifrwp.OpenRasterDataset(file); IRasterDataset sdeRasterDataset = null; lastIndex = file.LastIndexOf(@"."); file = file.Substring(0, lastIndex); try { sdeRasterDataset = rasterWorkspace.OpenRasterDataset(file); } catch (Exception Ex) { } if (sdeRasterDataset == null) { IGeoDataset geoDataset =rasterDataset as IGeoDataset ; IRasterSdeServerOperation rasterSdeServeroperation ; IBasicRasterSdeConnection sdeCon = new BasicRasterSdeLoader(); IPropertySet propertySet = new PropertySetClass(); propertySet = workspace.ConnectionProperties; //建立与SDE数据库的连接 sdeCon.ServerName = propertySet.GetProperty("server").ToString(); sdeCon.Instance = propertySet.GetProperty("instance").ToString(); sdeCon.UserName = propertySet.GetProperty("user").ToString(); sdeCon.Password = "sde"; sdeCon.Database = propertySet.GetProperty("database").ToString(); sdeCon.SdeRasterName = file; sdeCon.InputRasterName = fileName; rasterSdeServeroperation = sdeCon as IRasterSdeServerOperation; //保存影像数据到SDE数据库中 rasterSdeServeroperation.Create (); rasterSdeServeroperation.Update (); rasterSdeServeroperation.ComputeStatistics (); IRasterLayer rasterLayer=new RasterLayerClass (); sdeRasterDataset = rasterWorkspace.OpenRasterDataset(file); rasterLayer.CreateFromDataset(sdeRasterDataset); this.axMapControl1.Map.AddLayer(rasterLayer as ILayer); this.axMapControl1.Extent = this.axMapControl1.FullExtent; this.axMapControl1.Refresh(); } } } }} 转载地址：http://ozmja.baihongyu.com/