topic Export geometry to file in ArcGIS Enterprise Extensibility Questions

Export geometry to file

Guglielmo_Cordasco — Tue, 09 Mar 2021 13:33:26 GMT

Hi, I'm using a SOE and I would like to export a geometry to file in order to share it.
I tried with ExportToESRIShape (like in this example) but saving the output buffer in a file I didn't obtain a known format (e.g. shp or zip).
Anyone knows about another method? or an ExportToESRIShape example to export to file?

Thanks in advance,
Guglielmo.

Re: Export geometry to file

AlexRodriguez — Tue, 09 Mar 2021 13:41:18 GMT

First, I don't know what SOE is. But I don't think it matters. I'm responding to make sure you know that an ESRI shapefile is not a SINGLE file. An ESRI Shapefile is a collection of files (minimum 3, maximum like 7). So when you say you didn't get a known format (shp or zip) you won't get a single file. If you export to a shapefile you will get a collection of files with the same root name and each having a different filename extension (ie: .shp, .dbf, .prj, .shx, ...)

Re: Export geometry to file

nicogis — Tue, 09 Mar 2021 16:08:03 GMT

if can be useful you can see my soe https://github.com/nicogis/Factory-Utilities-SOE

here you have an operation ('ExtractData') https://github.com/nicogis/Factory-Utilities-SOE/blob/37f3a4868d85435bf03cb3b6648a1a7dedccae40/FactoryUtilities.cs#L218 where if you can pass a featureset from client you can select parameter dataFormat (SHAPEFILE) to dowload file zipped

Re: Export geometry to file

nicogis — Wed, 10 Mar 2021 12:03:29 GMT

If you want use sdk you can use FeatureDataConverter class ( FeatureDataConverter Class (arcgis.com) )

- create a scratch file gdb (try and see if you can use ProConcepts DDL · Esri/arcgis-pro-sdk Wiki · GitHub ) or use a template gdb empty on server

- use method convertfeatureclass ( IFeatureDataConverter2 Interface | ArcGIS Enterprise SDK )

- zip gdb

- download file (see this samples arcgis-enterprise-sdk-resources/Samples/dot net/SOE/DownloadFileRESTSOE at master · Esri/arcgis-enterprise-sdk-resources · GitHub )

Re: Export geometry to file

Guglielmo_Cordasco — Wed, 17 Mar 2021 16:43:47 GMT

Thanks nicogis!

I tried to use your ConvertFeatureClassToShapefile.
ConvertFeatureClassToShapefile takes as input IWorkspace sourceWorkspace and I have created a sourceWorkspace with:

IMapServer mapServer = (IMapServer)serverObjectHelper.ServerObject;
string mapName = mapServer.DefaultMapName;
// Use IMapServerDataAccess to get the data
IMapServerDataAccess dataAccess = (IMapServerDataAccess)mapServer;
// Get access to the source feature class.
IFeatureClass m_fc = (IFeatureClass)dataAccess.GetDataSource(mapName, 0);// Layer 0
IDataset pDataSet = (IDataset)m_fc;
IWorkspace sourceWorkspace = pDataSet.Workspace;

in ConvertFeatureClassToShapefile it is used new FeatureClassNameClass() does not exist in the SDK.
I replaced it with (IFeatureClassName)pDataSet.FullName but calling (IFeatureClass)sourceName.Open() I get System.Runtime.InteropServices.COMException (0x80040351): Exception from HRESULT: 0x80040351 at ESRI.ArcGIS.esriSystem.IName.Open()
Where am I doing wrong?

Thanks again.

Re: Export geometry to file

nicogis — Wed, 17 Mar 2021 20:03:27 GMT

In help you need see class that implement the interface IFeatureClassName

You can write similar code:

IMapServer mapServer = (IMapServer)serverObjectHelper.ServerObject; string mapName = mapServer.DefaultMapName; IMapServerDataAccess dataAccess = (IMapServerDataAccess)mapServer; IFeatureClass sourceFeatureClass = (IFeatureClass)dataAccess.GetDataSource(mapName, 0); IDataset sourceDataSet = (IDataset)sourceFeatureClass; IWorkspace sourceWorkspace = sourceDataSet.Workspace; IFeatureDataConverter featureDataConverter = new FeatureDataConverterClass(); IWorkspaceFactory targetWorkspaceFactory = new ShapefileWorkspaceFactory(); IWorkspace targetWorkspace = targetWorkspaceFactory.OpenFromFile($@"c:\temp", 0); IDataset targetWorkspaceDataset = (IDataset)targetWorkspace; IName targetWorkspaceDatasetName = targetWorkspaceDataset.FullName; IWorkspaceName targetWorkspaceName = (IWorkspaceName)targetWorkspaceDatasetName; IFeatureClassName shpFeatureClassName = new FeatureQueryNameClass(); IDatasetName shpDatasetName = (IDatasetName)shpFeatureClassName; shpDatasetName.WorkspaceName = targetWorkspaceName; shpDatasetName.Name = $"Test_{Guid.NewGuid()}"; int shapeFieldPosition = sourceFeatureClass.FindField(sourceFeatureClass.ShapeFieldName); IFields inputFields = sourceFeatureClass.Fields; IField shapeField = inputFields.get_Field(shapeFieldPosition); IGeometryDef geometryDef = (IGeometryDef)((IClone)shapeField.GeometryDef).Clone(); IFields outFields = (IFields)((IClone)sourceFeatureClass.Fields).Clone(); featureDataConverter.ConvertFeatureClass((IFeatureClassName)sourceDataSet.FullName, null, null, shpFeatureClassName, geometryDef, outFields, "", 1000, 0);