基于ArcGIS10.0和Oracle10g的空間數(shù)據(jù)管理平臺(tái)六（C#開(kāi)發(fā)）-空間數(shù)據(jù)操作類

本系統(tǒng)的一個(gè)重點(diǎn)功能就是管理空間數(shù)據(jù)，所以很多空間數(shù)據(jù)的操作，而且這些操作可能隨時(shí)都可能用到，所以單獨(dú)封裝為一個(gè)獨(dú)立的空間數(shù)據(jù)操作類（地圖操作類）。封裝的函數(shù)都是一些最基本的操作功能，具體實(shí)現(xiàn)基于ArcGIS平臺(tái)的空間數(shù)據(jù)管理還需要很多復(fù)雜的功能和邏輯，后面介紹空間數(shù)據(jù)管理和編輯的時(shí)候會(huì)詳細(xì)介紹。

1.首先我們需要介紹的是連接空間數(shù)據(jù)庫(kù)的代碼函數(shù)，具體實(shí)現(xiàn)如下：

        /// <summary>
        /// 連接空間數(shù)據(jù)庫(kù)并得到一個(gè)SDE工作空間的實(shí)例
        /// </summary>
        /// <returns></returns>
        public static IFeatureWorkspace GetFeatrueWorkspace()
        {
            //定義一個(gè)屬性 
            IPropertySet pPS = new PropertySetClass();

            //設(shè)置數(shù)據(jù)庫(kù)服務(wù)器名，服務(wù)器所在的IP地址 
            pPS.SetProperty("SERVER", ConfigurationSettings.AppSettings["SERVER"]);
            //propset.SetProperty("SERVER", "10.51.6.233");
            //設(shè)置SDE的端口，這是安裝時(shí)指定的，默認(rèn)安裝時(shí)"port:5151" 
            pPS.SetProperty("INSTANCE", ConfigurationSettings.AppSettings["INSTANCE"]);
            //SDE的用戶名 
            pPS.SetProperty("USER", ConfigurationSettings.AppSettings["USER"]);
            //密碼 
            pPS.SetProperty("PASSWORD", ConfigurationSettings.AppSettings["PASSWORD"]);
            //設(shè)置數(shù)據(jù)庫(kù)的名字,只有SQL Server  Informix 數(shù)據(jù)庫(kù)才需要設(shè)置 
 
           pPS.SetProperty("DATABASE", ConfigurationSettings.AppSettings["DATABASE"]);
            //SDE的版本,在這為默認(rèn)版本 
            pPS.SetProperty("VERSION", ConfigurationSettings.AppSettings["VERSION"]);

            //定義一個(gè)工作空間,并實(shí)例化為SDE的工作空間 
            IWorkspaceFactory pWF = new SdeWorkspaceFactoryClass();
            //打開(kāi)SDE工作空間,并轉(zhuǎn)化為地物工作空間 
            IFeatureWorkspace pFW = (IFeatureWorkspace)pWF.Open(pPS, 0);
            return pFW;
        }

上面這個(gè)函數(shù)是采用SDE連接方式，也可以采用直接連接的方式，下面一個(gè)函數(shù)通過(guò)一個(gè)if分支語(yǔ)句來(lái)判斷可以采用SDE也可以采用直接連接的方式實(shí)現(xiàn)，具體請(qǐng)看代碼及詳細(xì)的注釋：

        public static IWorkspace FindWsByDefault()
        {
            //定義一個(gè)屬性 
            IPropertySet Propset = new PropertySetClass();
            if (true) // 采用SDE連接 
            {
                //設(shè)置數(shù)據(jù)庫(kù)服務(wù)器名，服務(wù)器所在的IP地址 
                Propset.SetProperty("SERVER", "192.168.1.111");
                //設(shè)置SDE的端口，這是安裝時(shí)指定的，默認(rèn)安裝時(shí)"port:5151" 
                Propset.SetProperty("INSTANCE", "port:5151");
                //SDE的用戶名 
                Propset.SetProperty("USER", "sde");
                //密碼 
                Propset.SetProperty("PASSWORD", "sde");
                //設(shè)置數(shù)據(jù)庫(kù)的名字,只有SQL Server  Informix 數(shù)據(jù)庫(kù)才需要設(shè)置 
                //Propset.SetProperty("DATABASE", "sde");
                //SDE的版本,在這為默認(rèn)版本 
                Propset.SetProperty("VERSION", "SDE.DEFAULT");
            }
            else // 直接連接 
            {
                //設(shè)置數(shù)據(jù)庫(kù)服務(wù)器名,如果是本機(jī)可以用"sde:sqlserver:." 
                Propset.SetProperty("INSTANCE", "sde:sqlserver:zhpzh");
                //SDE的用戶名 
                Propset.SetProperty("USER", "sa");
                //密碼 
                Propset.SetProperty("PASSWORD", "sa");
                //設(shè)置數(shù)據(jù)庫(kù)的名字,只有SQL Server  Informix 數(shù)據(jù)庫(kù)才需要設(shè)置            
                Propset.SetProperty("DATABASE", "sde");
                //SDE的版本,在這為默認(rèn)版本 
                Propset.SetProperty("VERSION", "SDE.DEFAULT");
            }
            //定義一個(gè)工作空間,并實(shí)例化為SDE的工作空間 
            IWorkspaceFactory factory = new SdeWorkspaceFactoryClass();
            //打開(kāi)SDE工作空間,并轉(zhuǎn)化為地物工作空間
            IWorkspace workspace = factory.Open(Propset, 0);

            return workspace;
        }

代碼注釋里面提到的工作空間就相當(dāng)于一個(gè)數(shù)據(jù)庫(kù)，里面包含了各種可以操作的圖層（相當(dāng)于數(shù)據(jù)庫(kù)中的表）。

2.在一個(gè)指定的工作空間中查詢一個(gè)要素類

       /// <summary>
        /// 查找指定要素
        /// </summary>
        /// <param name="ws"></param>
        /// <param name="className"></param>
        /// <param name="dsName"></param>
        /// <returns></returns>
        public static IFeatureClass FindClassByName(IWorkspace ws, string className, string dsName)
        {
            IEnumDataset enumDs;
            if (dsName != "")
            {
                enumDs = ws.get_Datasets(esriDatasetType.esriDTFeatureDataset);
                IFeatureDataset featureDs = enumDs.Next() as IFeatureDataset;
                while (featureDs != null)
                {
                    string strTemp = featureDs.Name.Substring(featureDs.Name.IndexOf('.') + 1);
                    if (strTemp == dsName)
                    {
                        return GetFcFromDataset(featureDs, className);
                    }
                    featureDs = enumDs.Next() as IFeatureDataset;
                }
            }
            else
            {
                enumDs = ws.get_Datasets(esriDatasetType.esriDTFeatureClass);
                return GetFcFromEnumDataset(enumDs,className);
            }
            return null;
        }

然后利用這個(gè)函數(shù)實(shí)現(xiàn)了另外一個(gè)函數(shù)：通過(guò)要素類名和數(shù)據(jù)集名在指定的工作空間中尋找要素類

        /// <summary>
        /// 通過(guò)要素類名和數(shù)據(jù)集名在指定的工作空間中尋找要素類
        /// </summary>
        /// <param name="className"></param>
        /// <param name="datasetName"></param>
        /// <returns></returns>
        public static IFeatureClass FindClassByName(string className, string datasetName)
        {
            IWorkspace ws = FindWsByDefault();
            IFeatureClass featClass = FindClassByName(ws, className, datasetName);
            return featClass;
        }

3.在數(shù)據(jù)集中查找要素類，一個(gè)數(shù)據(jù)集可能包含多個(gè)要素類，數(shù)據(jù)集就是把一些具有共同特征（共同的數(shù)據(jù)結(jié)構(gòu)類型，空間參考相同等）的數(shù)據(jù)（要素類）劃分成一個(gè)一個(gè)的集合。

        /// <summary>
        /// 在數(shù)據(jù)集中查找要素類
        /// </summary>
        /// <param name="pFD"></param>
        /// <param name="className"></param>
        /// <returns></returns>
        public static IFeatureClass GetFcFromDataset(IFeatureDataset pFD, string className)
        {
            IFeatureClass pFC;
            IFeatureClassContainer pFCC = pFD as IFeatureClassContainer;
            for (int i = 0; i < pFCC.ClassCount; i++)
            {
                pFC = pFCC.get_Class(i);
                string strTemp = pFC.AliasName.Substring(pFC.AliasName.IndexOf('.') + 1);
                if (strTemp == className)
                {
                    return pFC;
                }
            }
            return null;
        }

4.將一個(gè)要素類從一個(gè)工作空間轉(zhuǎn)移到另外一個(gè)工作空間：例如文件系統(tǒng)目錄（Shape格式文件組成）、mdb或其他格式，文件系統(tǒng)目錄下的所有Shape文件（一個(gè)等同于表結(jié)構(gòu)的數(shù)據(jù)文件，內(nèi)容等同于表里面的數(shù)據(jù)）構(gòu)成一個(gè)工作空間。

         /// <summary>
        /// 將一個(gè)要素類從一個(gè)工作空間轉(zhuǎn)移到另外一個(gè)工作空間
        /// 注意目標(biāo)工作空間不能有改要素類，必須先清除  
        /// </summary>
        /// <param name="sourceWorkspace">源工作空間</param>
        /// <param name="targetWorkspace">目標(biāo)工作空間</param>
        /// <param name="nameOfSourceFeatureClass">源要素類名</param>
        /// <param name="nameOfTargetFeatureClass">目標(biāo)要素類名</param>
        public static void ConvertFeatureClass(IWorkspace sourceWorkspace, IWorkspace targetWorkspace,
            string nameOfSourceFeatureClass, string nameOfTargetFeatureClass, int sc_id)
        {            
            //create source workspace name
            //創(chuàng)建源工作空間名稱  
            IDataset sourceWorkspaceDataset = (IDataset)sourceWorkspace;
            IWorkspaceName sourceWorkspaceName = (IWorkspaceName)sourceWorkspaceDataset.FullName;
            //create source dataset name
            //創(chuàng)建源數(shù)據(jù)集名稱
            IFeatureClassName sourceFeatureClassName = new FeatureClassNameClass();
            IDatasetName sourceDatasetName = (IDatasetName)sourceFeatureClassName;
            sourceDatasetName.WorkspaceName = sourceWorkspaceName;
            sourceDatasetName.Name = nameOfSourceFeatureClass;
            //create target workspace name
            //創(chuàng)建目標(biāo)工作空間名稱
            IDataset targetWorkspaceDataset = (IDataset)targetWorkspace;
            IWorkspaceName targetWorkspaceName = (IWorkspaceName)targetWorkspaceDataset.FullName;
            //create target dataset name
            //創(chuàng)建目標(biāo)數(shù)據(jù)集名稱  
            IFeatureClassName targetFeatureClassName = new FeatureClassNameClass();
            IDatasetName targetDatasetName = (IDatasetName)targetFeatureClassName;
            targetDatasetName.WorkspaceName = targetWorkspaceName;
            targetDatasetName.Name = nameOfTargetFeatureClass;
            //Open input Featureclass to get field definitions. 
            //打開(kāi)輸入的要素類以得到字段定義 
            IName sourceName = (IName)sourceFeatureClassName;
            //打開(kāi)源要素類 
            IFeatureClass sourceFeatureClass = (IFeatureClass)sourceName.Open();

            //Validate the field names because you are converting between different workspace types.
            //驗(yàn)證字段名稱，因?yàn)槟阏诓煌愋偷墓ぷ骺臻g之間進(jìn)行數(shù)據(jù)轉(zhuǎn)換
            IFieldChecker fieldChecker = new FieldCheckerClass();
            IFields targetFeatureClassFields;
            IFields sourceFeatureClassFields = sourceFeatureClass.Fields;
            IEnumFieldError enumFieldError;
            // Most importantly set the input and validate workspaces!  
            //最重要的設(shè)置輸入和驗(yàn)證工作空間
            fieldChecker.InputWorkspace = sourceWorkspace;
            fieldChecker.ValidateWorkspace = targetWorkspace;
            fieldChecker.Validate(sourceFeatureClassFields, out enumFieldError, out targetFeatureClassFields);
            // Loop through the output fields to find the geomerty field
            //遍歷所有輸出字段找到幾何字段
            IField geometryField;
            for (int i = 0; i < targetFeatureClassFields.FieldCount; i++)
            {
                if (targetFeatureClassFields.get_Field(i).Type == esriFieldType.esriFieldTypeGeometry)
                {
                    geometryField = targetFeatureClassFields.get_Field(i);
                    // Get the geometry field's geometry defenition 
                    //得到幾何字段的幾何定義
                    IGeometryDef geometryDef = geometryField.GeometryDef;
                    //Give the geometry definition a spatial index grid count and grid size
                    //賦予幾何定義一個(gè)空間索引格網(wǎng)數(shù)目和格網(wǎng)大小值
                    IGeometryDefEdit targetFCGeoDefEdit = (IGeometryDefEdit)geometryDef;
                    targetFCGeoDefEdit.GridCount_2 = 1;
                    targetFCGeoDefEdit.set_GridSize(0, 0);
                    //Allow ArcGIS to determine a valid grid size for the data loaded
                    //允許ArcGIS為數(shù)據(jù)加載確定一個(gè)有效的格網(wǎng)大小
                    if (sc_id == 0)
                    {
                        targetFCGeoDefEdit.SpatialReference_2 = geometryField.GeometryDef.SpatialReference;
                    } 
                    else
                    {
                        ISpatialReferenceFactory2 pSRF2 = new SpatialReferenceEnvironmentClass();
                        IGeographicCoordinateSystem pGCS = pSRF2.CreateGeographicCoordinateSystem(sc_id);
                        ISpatialReference pSR = (ISpatialReference)pGCS;
                        targetFCGeoDefEdit.SpatialReference_2 = pSR;
                    }
                    //geometryField.GeometryDef.SpatialReference;
                    // we want to convert all of the features
                    //轉(zhuǎn)換要素類中所有的要素
                    IQueryFilter queryFilter = new QueryFilterClass();
                    queryFilter.WhereClause = "";
                    // Load the feature class
                    //加載要素類
                    IFeatureDataConverter fctofc = new FeatureDataConverterClass();
                    IEnumInvalidObject enumErrors = fctofc.ConvertFeatureClass(sourceFeatureClassName,
                        queryFilter, null, targetFeatureClassName, geometryDef, 
                        targetFeatureClassFields, "", 1000, 0);
                    break;
                }
            }
        }

5.將mdb或Shape文件中要素類轉(zhuǎn)換追加到sde數(shù)據(jù)庫(kù)已有的要素類中，追加的mdb和Shape格式必須同SDE（空間數(shù)據(jù)庫(kù)插件）數(shù)據(jù)庫(kù)中表結(jié)構(gòu)的數(shù)據(jù)格式相同

       /// <summary>
        /// 將mdb或Shape文件中要素類轉(zhuǎn)換追加到sde數(shù)據(jù)庫(kù)已有的要素類中
        /// </summary>
        /// <param name="sourceWorkspace"></param>
        /// <param name="targetWorkspace"></param>
        /// <param name="nameOfSourceFeatureClass"></param>
        /// <param name="nameOfTargetFeatureClass"></param>
        public static void AddFeatureClassToSDE(IWorkspace sourceWorkspace, IWorkspace targetWorkspace,
            string nameOfSourceFeatureClass, string nameOfTargetFeatureClass)
        {
            IFeatureWorkspace pSourceFW = sourceWorkspace as IFeatureWorkspace;
            IFeatureClass pSourceFc = pSourceFW.OpenFeatureClass(nameOfSourceFeatureClass);

            IFeatureWorkspace pTargetFW = targetWorkspace as IFeatureWorkspace;
            IFeatureClass pTargetFc = pTargetFW.OpenFeatureClass(nameOfTargetFeatureClass);

            mdb2fc(pSourceFc, pTargetFc);
        }

函數(shù)通過(guò)各自的工作空間和要素類名稱等到具體需要轉(zhuǎn)換的要素類（包括源要素類：mdb或shape格式中的表結(jié)構(gòu)和目標(biāo)要素類：SDE中的表結(jié)構(gòu)），然后調(diào)用mdb2fc完成具體的轉(zhuǎn)換工作，實(shí)現(xiàn)代碼如下：

        /// <summary>
        /// 追加要素到SDE的featureclass中
        /// </summary>
        /// <param name="pSourceFc">源要素類</param>
        /// <param name="pTargetFc">目的要素類</param>
        private static void mdb2fc(IFeatureClass pSourceFc, IFeatureClass pTargetFc)
        {
            IFeatureCursor pFeaCursor = pSourceFc.Search(null, false);
            IFeature pFeature = pFeaCursor.NextFeature();

            IField pField = new FieldClass();
            int iIndex = 0;

            while (pFeature != null)
            {
                IFeature tempFeature = pTargetFc.CreateFeature();
                tempFeature.Shape = pFeature.Shape;

                try
                {
                    //添加字段值
                    for (int j = 0; j < pSourceFc.Fields.FieldCount; j++)
                    {
                        pField = pSourceFc.Fields.get_Field(j);
                        iIndex = tempFeature.Fields.FindField(pField.Name);
                        if (pField.Editable && iIndex != -1)
                        {
                            tempFeature.set_Value(iIndex, pFeature.get_Value(j));
                        }
                    }
                    tempFeature.Store();
                }
                catch (System.Exception ex)
                {
                    MessageBox.Show(ex.Message);
                    return;
                }
                pFeature = pFeaCursor.NextFeature();
            }
        }

上面根據(jù)源要素類的每一個(gè)字段的每一個(gè)值依次遍歷并且插入SDE的目的要素類（表）中。

6.在圖層中搜索要素

        /// <summary>
        /// 在圖層中搜索要素
        /// </summary>
        /// <param name="pFeatLyr">需要搜索的圖層</param>
        /// <param name="pGeo">搜索的集合條件</param>
        /// <returns>包含結(jié)果集的游標(biāo)對(duì)象</returns>
        public static IFeatureCursor SearchFeatures(IFeatureLayer pFeatLyr, IGeometry pGeo)
        {
            try
            {
                ISpatialFilter spatialFilter = new SpatialFilterClass();
                spatialFilter.Geometry = pGeo;
                spatialFilter.GeometryField = pFeatLyr.FeatureClass.ShapeFieldName;
                spatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
                IFeatureCursor featureCursor = pFeatLyr.FeatureClass.Search(spatialFilter, false);
                return pFeatLyr.FeatureClass.Search(spatialFilter, false);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                return null; 
            }
        }

7.從選擇集中創(chuàng)建要素集

       /// <summary>
        /// 從選擇集中創(chuàng)建要素集
        /// </summary>
        /// <param name="pFeatureLayer">來(lái)源圖層</param>
        /// <param name="pGeometry">選擇范圍</param>
        /// <returns>FeatureClass</returns>
        public static IFeatureClass CreateSelectionLayer(IFeatureLayer pFL, IGeometry pGeometry)
        {
            try
            {
                IFeatureLayerDefinition pFLD = pFL as IFeatureLayerDefinition;

                ISpatialFilter pSF = new SpatialFilterClass();
                pSF.Geometry = pGeometry;
                pSF.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;

                IQueryFilter pQFilter = pSF;
                IFeatureSelection pFeatureSel = pFL as IFeatureSelection;

                pFeatureSel.SelectFeatures(pSF, esriSelectionResultEnum.esriSelectionResultNew, false);
                IFeatureLayer pSelFL = pFLD.CreateSelectionLayer("Selected Layer", true, null, null);

                return pSelFL.FeatureClass;
            }
            catch (Exception e)
            {
                throw (new Exception(e.Message));
            }
        }

8.得到一個(gè)要素類和數(shù)據(jù)集的空間參考系

       /// <summary>
        /// 得到一個(gè)要素類的空間參考系
        /// </summary>
        /// <param name="pFeatureClass">要素類</param>
        /// <returns>空間參考系</returns>
        public static ISpatialReference getSpatialReference(IFeatureClass pFeatureClass)
        {
            IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;
            return pGeoDataset.SpatialReference;

        }

        /// <summary>
        /// 得到一個(gè)數(shù)據(jù)集的空間參考系
        /// </summary>
        /// <param name="pFeatureDataset">數(shù)據(jù)集</param>
        /// <returns>空間參考系</returns>
        public static ISpatialReference getSpatialReference(IFeatureDataset pFeatureDataset)
        {
            IGeoDataset pGeoDataset = pFeatureDataset as IGeoDataset;
            return pGeoDataset.SpatialReference;
        }

9.改變要素類的空間參考

        /// <summary>
        /// 改變要素類的空間參考
        /// </summary>
        /// <param name="pFeatureClass">要素類</param>
        /// <param name="pGeoType">空間參考類型</param>
        public static void ChangeFeatureClassRef(IFeatureClass pFeatureClass, int gcsType)
        {
            IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;
            //QI 到IGeoDatasetSchemaEdit
            IGeoDatasetSchemaEdit pGeoDatasetSchemaEdit = pGeoDataset as
            IGeoDatasetSchemaEdit;
            if (pGeoDatasetSchemaEdit.CanAlterSpatialReference == true)
            {
                //創(chuàng)建SpatialReferenceEnvironmentClass對(duì)象
                ISpatialReferenceFactory2 pSpaRefFactory = new SpatialReferenceEnvironmentClass();
                //創(chuàng)建地理坐標(biāo)系對(duì)象
                IGeographicCoordinateSystem pNewGeoSys = pSpaRefFactory.CreateGeographicCoordinateSystem(gcsType);
                pGeoDatasetSchemaEdit.AlterSpatialReference(pNewGeoSys);
            }
        }

10.根據(jù)各種信息創(chuàng)建要素類

        /// <summary>
        /// 創(chuàng)建一個(gè)要素類
        /// </summary>
        /// <param name="workspace">創(chuàng)建要素類的工作空間</param>
        /// <param name="featureDataset">數(shù)據(jù)集</param>
        /// <param name="featureClassName">要素類名稱</param>
        /// <param name="fields">字段集合</param>
        /// <param name="CLSID"></param>
        /// <param name="CLSEXT"></param>
        /// <param name="strConfigKeyword"></param>
        /// <returns></returns>
        public static IFeatureClass CreateFeatureClass(IWorkspace2 workspace,
            IFeatureDataset featureDataset, String featureClassName, IFields fields,
            UID CLSID, UID CLSEXT, String strConfigKeyword)
        {
            // name was not passed in 
            if (featureClassName == "")
            {
                return null;
            }

            IFeatureClass featureClass;
            IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace;

            //feature class with that name already exists 
            if (workspace.get_NameExists(esriDatasetType.esriDTFeatureClass, featureClassName)) 
            {
                featureClass = featureWorkspace.OpenFeatureClass(featureClassName);
                return featureClass;
            }

            // assign the class id value if not assigned
            if (CLSID == null)
            {
                CLSID = new UIDClass();
                CLSID.Value = "esriGeoDatabase.Feature";
            }

            IObjectClassDescription objectClassDescription = new FeatureClassDescriptionClass();

            // if a fields collection is not passed in then supply our own
            if (fields == null)
            {
                return null;
            }

            System.String strShapeField = "";

            // locate the shape field
            for (int j = 0; j < fields.FieldCount; j++)
            {
                if (fields.get_Field(j).Type == esriFieldType.esriFieldTypeGeometry)
                {
                    strShapeField = fields.get_Field(j).Name;
                    break;
                }
            }

            // Use IFieldChecker to create a validated fields collection.
            IFieldChecker fieldChecker = new FieldCheckerClass();
            IEnumFieldError enumFieldError = null;
            IFields validatedFields = null;
            fieldChecker.ValidateWorkspace = (IWorkspace)workspace;
            fieldChecker.Validate(fields, out enumFieldError, out validatedFields);

            // The enumFieldError enumerator can be inspected at this point to determine 
            // which fields were modified during validation.

            // finally create and return the feature class
            if (featureDataset == null)// if no feature dataset passed in, create at the workspace level
            {
                featureClass = featureWorkspace.CreateFeatureClass(featureClassName, validatedFields, CLSID,
                    CLSEXT, esriFeatureType.esriFTSimple, strShapeField, strConfigKeyword);
            }
            else
            {
                featureClass = featureDataset.CreateFeatureClass(featureClassName, validatedFields, CLSID,
                    CLSEXT, esriFeatureType.esriFTSimple, strShapeField, strConfigKeyword);
            }
            return featureClass;
        }

11.導(dǎo)入一個(gè)要素類到目標(biāo)工作空間中

        /// <summary>
        /// 導(dǎo)入一個(gè)要素類到目標(biāo)工作空間中
        /// </summary>
        /// <param name="pFW">目標(biāo)工作空間</param>
        /// <param name="pFD">目標(biāo)工作空間中的數(shù)據(jù)集</param>
        /// <param name="strFCName">導(dǎo)入的目標(biāo)工作空間的要素類名稱</param>
        /// <param name="pFC">被導(dǎo)入的要素類</param>
        public static void ImportFeatureClassToSDE(IFeatureWorkspace pFW, IFeatureDataset pFD,
            string strFCName, IFeatureClass pSourceFC)
        {
            if (pSourceFC == null)
            {
                MessageBox.Show("被導(dǎo)入的要素類為空了!");
                return;
            }
            IWorkspace2 pW2 = pFW as IWorkspace2;
            IFeatureClass pTargetFC = null;
            pTargetFC = CreateFeatureClass(pW2, pFD, strFCName, pSourceFC.Fields, null,
                null, "");

            if (pTargetFC != null)
            {
                mdb2fc(pSourceFC, pTargetFC);
            }
            else
            {
                MessageBox.Show("打開(kāi)或創(chuàng)建目標(biāo)要素類失敗!");
            }
        }

12.編輯空間參照和設(shè)置IFeatureDataset空間參照

        /// <summary>
        /// 編輯空間參照
        /// </summary>
        /// <param name="inputSpr"></param>
        /// <returns></returns>
        public static ISpatialReference EditSpatialReferenceDlg(ISpatialReference inputSpr)
        {
            ESRI.ArcGIS.CatalogUI.ISpatialReferenceDialog2 spatialReferenceDialog2 = new ESRI.ArcGIS.CatalogUI.SpatialReferenceDialogClass();
            ISpatialReference spf = spatialReferenceDialog2.DoModalEdit(inputSpr, false, false, false, false, false, false, false, 0);
            return spf;
        }

        /// <summary>
        /// 設(shè)置IFeatureDataset空間參照
        /// </summary>
        /// <param name="ds"></param>
        /// <returns></returns>
        public static void SetFdsSpatialReference(IFeatureClass ds)
        {
            IGeoDataset gds = ds as IGeoDataset;
            // Cast the geodataset to the IGeoDatasetSchemaEdit interface and set the Spatial Reference.    
            IGeoDatasetSchemaEdit geoDatasetSchemaEdit = (IGeoDatasetSchemaEdit)gds;
            if (geoDatasetSchemaEdit.CanAlterSpatialReference)
            {
                geoDatasetSchemaEdit.AlterSpatialReference(EditSpatialReferenceDlg(gds.SpatialReference));
            }
        }

這里實(shí)現(xiàn)所有的函數(shù)都是在類MapOperation中，要看懂上面的所有代碼必須要有一些ArcObejct編程的基礎(chǔ)知識(shí)，當(dāng)然還包括我前一篇博文介紹的有關(guān)于ArcGIS的相關(guān)知識(shí)，為了給大家提供一些ArcObject的編程知識(shí)，特別是用C#講解的，我上傳一本電子書，這本書我覺(jué)得很不錯(cuò)，講到了很多關(guān)于ArcGIS二次開(kāi)發(fā)的各個(gè)方面。電子書的下載地址：

http://download.csdn.net/detail/wanweiaiaqiang/3824454；或在下載頁(yè)搜索：ArcGIS Engine+C#實(shí)例開(kāi)發(fā)教程。

凌晨1:50，睡覺(jué)了。昨天晚上我們整個(gè)項(xiàng)目組在公司加班到晚上10點(diǎn)以后哦！

posted @ 2011-11-22 01:48 薔薇理想人生閱讀(1315) 評(píng)論(0) 收藏舉報(bào)

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