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How do you Query a Map Service in a Map Document?

Question asked by th1209 on Aug 14, 2014
Latest reply on Aug 18, 2014 by ebrimhall

Hi All -

I'm building an Add-in for ArcMap (using C# and ArcObjects) that provides a custom dialog with a textbox that expects a parcel APN number; entered by the user. If the APN is valid, zoom to the location.  When I began developing this tool I took a subset of my Map Service parcel data and created a gdb.

I got everything working and assumed...(wrongly)... that I could simply change the CLSID reference in the code from working with geodatabase layers to  MapServer sublayer.  As I stated, this was wrong. It now appears that I have an invalid cast. Can anyone suggest how I might be able to save most of this code without having to rewrite it to work with a map service? The map service supports the Query operation, I suspect the answer lies within IQuery. On the positive side, I have created a tool that will successfully close ArcMap...rather quickly too I might add.


<Add-in code snippet>


            IMxDocument pMxDoc = ArcMap.Document;

            pMap = pMxDoc.FocusMap;

            IEnumLayer pEnumLayer = null;

            // string LayerCLSID = "{E156D7E5-22AF-11D3-9F99-00C04F6BC78E}";

            string LayerCLSID = "{B059B902-5C7A-4287-982E-EF0BC77C6AAB}"; // IMapServerSublayer

            ESRI.ArcGIS.esriSystem.UID uid = new ESRI.ArcGIS.esriSystem.UIDClass();

            uid.Value = LayerCLSID;


            pEnumLayer = pMap.get_Layers(((ESRI.ArcGIS.esriSystem.UID)(uid)), true);


            ILayer layer = pEnumLayer.Next();

            ILayer selLayer = null;


            while (!(layer == null))


                if (layer.Name == "Riverside Parcels")


                    selLayer = layer;

                    string sqlStatement = "APN = '" + textBox1.Text + "'";

                    IFeatureSelection fSelection = selLayer as IFeatureSelection; //  <= **** Invalid Cast? ****

                    IQueryFilter qFilter = new QueryFilterClass();

                    esriSelectionResultEnum selectionResult = new esriSelectionResultEnum();

                    qFilter.WhereClause = sqlStatement;



                }//closes if


                layer = pEnumLayer.Next();

             }//closes while