Latest Contributions by CarstenSchumann

I´m creating a SeverObjectExtension using ArcObjects for Server 10.6. Here I have a method that reads a geometry from HTTP-request as follows: public IGeometry Json2Geometry(JsonObject json) {     IGeometry geometry = null;     IJSONReader jsonReader = new JSONReaderClass();     jsonReader.ReadFromString(json.ToJson());     IJSONDeserializer jsonDeserializer = null;     jsonDeserializer = new JSONConverterGeometry() as IJSONDeserializer;     jsonDeserializer.InitDeserializer(jsonReader, null);     geometry = ((IJSONConverterGeometry)jsonDeserializer).ReadGeometry(jsonReader, esriGeometryType.esriGeometryAny, false, false);     return geometry; }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ Now I´m doing something with that geometry. In my case I cast it to IPolyline: if(geometry.GeometryType == esriGeometryPolyline) {     var polyline = (IPolyline) geometry;     ... }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ I get an InvalidCastException on the coe above. So what does ReadGeometry return if not an instance of IPolyline (in case of geometrytype polyline as shown above). The JSON looks like this: {   "paths":     [       [         [486893.89699999994,5755807.910000002],         [486904.18500000244,5755744.383000003]       ]     ],   "spatialReference":{"wkid":25832,"latestWkid":25832} }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ I also tried to create a completely new polyline based on two points. Then I converted that geometry to json using the following: ILine line = new LineClass(); (line as IGeometry).SpatialReference = point1.SpatialReference; line.PutCoords(poin1, point2); object optional = Missing.Value; IPolyline pline = new PolylineClass(); ((ISegmentCollection)pline).AddSegment((ISegment)line, ref optional, ref optional); ((ITopologicalOperator)pline).Simplify(); ((IJSONConverterGeometry)jsonSerializer).WriteGeometry(jsonWriter, null, pline, false);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ When I convert that back to an IGeometry using ReadGeometry as mentioned above I also get that exception. Update: I also tried to use the less generic method ReadPolyline, which should return an IPolyline. Instead I get the mentioned exception. So whatever the method returns, it´s not an IPolyline. ... View more

I am using a SOE on top of a MapService in order to enable complex editing of the features in my File-Geodatabase. We use a SOE as we have much ArcObjects-code in our code-base that wraps rows from within a table to actual features. So in fact a feature consists of several rows in different tables, thus updates to a single row should be notified by the others. We´re also using topological edits which I suppose a feature-service can´t handle. When I try to edit a feature I get the following error: Workspace or data source is read only. If I understand things right, a map-service is just for presenting a map, not for modifying the data. This is where a feature-service would come into play, which however does not have support for a Server-object-extension and thus won´t handle our business-logic very well.  I´ve already tried to read the connection-properties of the underlying map-service and re-open it: public void Init(IServerObjectHelper pSOH) {      serverObjectHelper = pSOH;      if (serverObjectHelper.ServerObject.TypeName == "MapServer")      {           m_mapServer = serverObjectHelper.ServerObject as IMapServer;           m_mapServerDataAccess = (IMapServerDataAccess)serverObjectHelper.ServerObject;      }      IMapServerInfo mapServerInfo = m_mapServer.GetServerInfo(m_mapServer.MapName[0]);      IMapLayerInfos mapLayerInfos = mapServerInfo.MapLayerInfos;      for (int layerId = 0; layerId < mapLayerInfos.Count; layerId++)      {           IFeatureClass fc = (IFeatureClass)m_mapServerDataAccess.GetDataSource(m_mapServer.MapName[0], layerId);           if (fc != null)           {                IDataset fsDataset = (IDataset)fc;                m_workspace = fsDataset.Workspace;           }           if (m_workspace != null)                break;      }      if(this.m_workspace == null)           throw new ArcGISAccessException("Workspace could not be opened");      var props = this.m_workspace.ConnectionProperties;      var factory = new FileGDBWorkspaceFactory();      var editWorkspace = factory.Open(props, 0); }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ However this yields to the examt same error. I can´t see what I´m doing different than the code from the samples. I also noticed that I am able to edit the data in the geodatabase in ArcMap without any problems, even when it is used by the map-service. EDIT: To limit the cause of error I set up a completely new service that references a newly created File-Geodatabase containing only a single feature within a featureclass ("FC"). Now I update that feature within my request-handler: private byte[] ModifyFeature(NameValueCollection boundVariables, JsonObject operationInput, string outputFormat,               string requestProperties, out string responseProperties) {      responseProperties = null;      var featureWorkspace = (IFeatureWorkspace) this.m_workspace;      var editWorksopace = (IWorkspaceEdit) this.m_workspace;                   var featureClass = featureWorkspace.OpenFeatureClass("FC");      var feature = featureClass.Search(null, false).NextFeature();      var index = featureClass.FindField("MyAttribute");      if (featureClass.Fields.Field[index].Editable)      {           editWorksopace.StartEditing(false);           editWorksopace.StartEditOperation();           feature.set_Value(index, "Hallo");           feature.Store();                    editWorksopace.StopEditOperation();           editWorksopace.StopEditing(true);      }      var result = new JsonObject();      result.AddString("Status", "OK");      return Encoding.UTF8.GetBytes(result.ToJson()); }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ I still get the same error, although I even check if the field of that feature is editable.  ... View more

I followed the samples from ESRI (e.g. this one from GitHub) to enable feature-access to my service and everything worked fine. Next I changed the URL into my own feature-service and provided my crendetials to access that service. So I ended up with the following code: //var serviceUrl = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0"; var serviceUrl = "https://myhost/arcgis/rest/services/MyService/FeatureServer/0"; ServerInfo serverInfo = new ServerInfo {      ServerUri = new Uri(serviceUrl),      TokenAuthenticationType = TokenAuthenticationType.ArcGISToken,      TokenServiceUri = new Uri("https://myhost/arcgis/admin/generateToken") }; AuthenticationManager.Current.RegisterServer(serverInfo); AuthenticationManager.Current.ChallengeHandler = new ChallengeHandler(      async info =>           await AuthenticationManager.Current.GenerateCredentialAsync(info.ServiceUri, user, password,                info.GenerateTokenOptions)); var featureTableUri = new System.Uri(serviceUrl); var table = new ServiceFeatureTable(featureTableUri); var queryParameters = new QueryParameters { WhereClause = "1 = 1" }; FeatureQueryResult features = await table.QueryFeaturesAsync(queryParameters);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ When I execute this code I get the following exception on the last line, which doesn´t seem very meaningful to me: Exception thrown: 'System.InvalidOperationException' in mscorlib.dll Additional information: Cannot call this method in this context: Object failed to load, unable to execute task. ‍‍‍‍‍ When I set a breakpoint on the GenerateCredentialAsync-line (line 12) I also notice it´s never hit. So I wonder if the challengehandler is even registered correctly and fires the challenge-event appropriately. ... View more

We´re are re-designing our desktop-app which consists of some millions of lines of ArcObjects-code. To do this, we plan to create a prototype based on ArcGIS Server and the Runtime SDK. But in contrast to the samples we plan to use the runtime-client as a service to access it within a WebGIS, where the actual presentation happens. So we end up a three-tier-architecture with an ArcGIS-Server as data-layer, the runtime-app as business-layer and the web-client as presentation-layer. So my question is if this is possible with the runtime-SDK or if there are better oppourtunities to extend the ArcGIS-server with some business-logic.  Some words to that logic: currently it contains dozens of event-handlers registered to the events propagated by ArcMap as well as the geodatabase. So in order to store a feature, we need to be able to implicitely update other features that may be related. This in fact triggers recursive store-operations to those features. Another feature we´re currently using and extending is the ability to undo and redo operations or even rollback the entire session. I know this question is fairly complex and not easy to answer. But so far we couldn´t get any idea on which framework to use. ... View more