C#针对ArcSDE的操作2（矢量数据、栅格数据导入到数据集）

１．数据集与数据的概念
　　ArcGIS Help关于数据与数据集的概念：
　　要素类：具有一组公用属性字段的同一类型要素（例如，井、宗地和街道）的集合。
　　要素数据集：主题相关的要素类的集合（通常用于管理拓扑、网络或地形）。
　　栅格数据集：涉及一定范围的单个栅格或影像数据图层。
　　栅格目录：一个排列有序的影像集合，例如涉及某一区域的一系列影像切片。
　　总结一下：要素数据集（Feature Dataset）由一组相同空间参考（Spatial Reference）的要素类（Feature Class）组成，一个要素数据集中可以有多个要素类。而一个栅格数据集（Raster dataset）只能保存单张影像，可以管理多张影像的集合称之为栅格目录（Raster Catalog）。
　　
2．矢量数据导入要素数据集

图1.矢量数据导入界面

if(((DataRowView)comboBoxEx1.SelectedItem).Row["DatasetID"].ToString() == "要素数据集"){    FileInfo fileInfo = new FileInfo(fileName);    string filePath = fileInfo.DirectoryName;    string file = fileInfo.Name;    IWorkspaceFactory shpwpf = new ShapefileWorkspaceFactory();    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 FeatureClassDescriptionClass();    IObjectClassDescription objectClassDescription = featureClassDescription as IObjectClassDescription;    IFields fields = shpfc.Fields;    IFieldChecker fieldChecker = new FieldCheckerClass();    IEnumFieldError enumFieldError = null;    IFields vFields = null;    fieldChecker.ValidateWorkspace = featureWorkspace as IWorkspace;    fieldChecker.Validate(fields, out enumFieldError, out vFields);    featureDataset = featureWorkspace.OpenFeatureDataset(this.comboBoxEx2.Text);    try    {        sdeFeatureClass = featureWorkspace.OpenFeatureClass(shpfc.AliasName);    }    catch    {    }    if (sdeFeatureClass == null)    {        sdeFeatureClass = featureDataset.CreateFeatureClass(shpfc.AliasName, vFields,        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;        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();        }    }    MessageBox.Show("导入成功", "信息", MessageBoxButtons.OK, MessageBoxIcon.Information);}

3．栅格数据导入栅格数据集
　　在对已经构建的栅格数据中导入栅格数据遇到了点问题，。。。暂时的解决方案是删除已经构建的栅格数据集，并将要导入的栅格数据命名为原栅格数据名并导入。缺点是代码量提升以及让之前构建的栅格数据集有些多此一举。

图2.将遥感影像导入栅格数据集

else if (((DataRowView)comboBoxEx1.SelectedItem).Row["DatasetID"].ToString() == "栅格数据集") {    //导入SDE数据库    type = "栅格数据";    FileInfo fileInfo = new FileInfo(fileName);    string filePath = fileInfo.DirectoryName;    string file = fileInfo.Name;    string file1;    int lastIndex;    rasterWorkspaceEx = workspace as IRasterWorkspaceEx;    IWorkspaceFactory tifwpf = new RasterWorkspaceFactoryClass();    IWorkspace tifwp = tifwpf.OpenFromFile(filePath, 0);    IRasterWorkspace tifrwp = tifwp as IRasterWorkspace;    IRasterDataset rasterDataset =      tifrwp.OpenRasterDataset(file);    lastIndex = file.LastIndexOf(@".");    file1 = file.Substring(0, lastIndex);    //存储栅格辅助函数    imortRasterData(filePath, file, this.comboBoxEx2.Text);    MessageBox.Show("导入成功");    sql();}

//存储栅格辅助函数private void imortRasterData(string strRasterFileDir, string strRasterFileName, string strOutName){    try    {        IWorkspace2 pWS2 = workspace as IWorkspace2;        IRasterWorkspaceEx pRWs = workspace as IRasterWorkspaceEx;        IDataset pDataset = pRWs.OpenRasterDataset(strOutName) as IDataset;        //删掉之前创建的栅格数据集        pDataset.Delete();        pDataset = null;        IWorkspaceFactory pRasterWsFac = new RasterWorkspaceFactoryClass();        IWorkspace pWs = pRasterWsFac.OpenFromFile(strRasterFileDir, 0);        IRasterDataset pRasterDs = null;        IRasterWorkspace pRasterWs;        if (!(pWs is IRasterWorkspace))        {            return;        }        pRasterWs = pWs as IRasterWorkspace;        pRasterDs = pRasterWs.OpenRasterDataset(strRasterFileName);        ISaveAs2 saveAs2 = (ISaveAs2)pRasterDs;        IRasterStorageDef rasterStorageDef = new RasterStorageDefClass();        IRasterStorageDef2 rasterStorageDef2 = (IRasterStorageDef2)rasterStorageDef;        rasterStorageDef2.CompressionType = esriRasterCompressionType.esriRasterCompressionUncompressed;        rasterStorageDef2.CompressionQuality = 100;        rasterStorageDef2.Tiled = true;        rasterStorageDef2.TileHeight = 128;        rasterStorageDef2.TileWidth = 128;        saveAs2.SaveAsRasterDataset(strOutName, workspace, "gdb", rasterStorageDef2);    }    catch (Exception ex)    {        MessageBox.Show(ex.ToString());        return;    }}

　　如果栅格数据较大，存储需要较长时间，可以创建一个等待界面，参考解决C#窗口假死问题
　　同样的，数据导入数据集后，可以在ArcCatelog中查看：

图３.在地理数据库中查看数据集中的数据