Deserialize FeatureSet JSON to Feature Class

Question

I am working on some geoprocessing services that will require the use of ArcObjects, no way around that.  I have been playing around with making a custom tool via IGPFunction2, and publishing that as a service.  That whole process seems a bit much if you ask me.

I have been experimenting with sending a feature set's json to a wcf service, where I  deserialize to a feature class, do some ArcObjects magic, and then send back to the client.

The hack of a deserialization routine that I slapped together is disappointingly slow, but I only worked on it for a few hours.  So, I have a couple of questions for anyone else who has gone this route:

1.  Is there a standard function/library to do the serialization/deserialization on the .NET backend?
2.  Is there some reason why I shouldn't do this?

Any comments or suggestions welcome.

p.s.  I am working in Flex, but imagine the same process would be similar to Silverlight developers as well.

nicogis · Answer

I have written for you a sample from featureSet json to feature class

string jsonfeatureSet = "{"displayFieldName":"","fieldAliases":{"OBJECTID":"OBJECTID","Indirizzo":"Indirizzo"},"geometryType":"esriGeometryPoint","spatialReference":{"wkid":102100},"fields":[{"name":"OBJECTID","type":"esriFieldTypeOID","alias":"OBJECTID"},{"name":"Indirizzo","type":"esriFieldTypeString","alias":"Indirizzo","length":50}],"features":[" +
            "{" +
             ""geometry": {" +
                ""x": 940411.3699657875," +
                ""y": 5643498.120243863," +
                ""spatialReference": {"wkid": 102100}" +
              "}," +
              ""attributes": {" +
                ""OBJECTID": 1," +
                ""Indirizzo": "VIA SORDI, 1"" +
              "}" +
            "}]}";

IJSONReader jsonReader = new JSONReaderClass();
            jsonReader.ReadFromString(jsonfeatureSet);

IJSONConverterGdb JSONConverterGdb = new JSONConverterGdbClass();
            IPropertySet ppOriginalToNewFieldMap;
            IRecordSet pRecorset;
            JSONConverterGdb.ReadRecordSet(jsonReader, null, null, out pRecorset, out ppOriginalToNewFieldMap);

Type factoryType = Type.GetTypeFromProgID("esriDataSourcesGDB.FileGDBWorkspaceFactory");
            IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)Activator.CreateInstance(factoryType);
            IWorkspace workspace = workspaceFactory.OpenFromFile(@C:\Temp	estsd\sd.gdb, 0);
            IRecordSet2 recordSet2 = pRecorset as IRecordSet2;
            recordSet2.SaveAsTable(workspace, "Test");

nicogis · Answer

http://resources.arcgis.com/en/help/arcobjects-net/componenthelp/index.html#//002500000nrr000000
see in my blog : http://www.nicogis.blogspot.it/2012/04/json-arcobjects.html

RafaelFerraro · Answer

Thanks for suggestion about JSON.NET.

I am using IGPFunction2 to create a custom tool (think ArcToolbox tool) that can be published to AGIS as a geoprocessing service.  All of the examples I have seen for .NET tools to AGIS Geoprocessing Services went this route.  If there is a better way, please tell me.