Set QueryParameters.MaxFeatures and catch a exception

Question

When I set QueryParameters.MaxFeatures  execute query then will catch a exception(Unable to complete operation.), but don't set it codes go well

xiaoguangyan · Answer

Hi Jennifer

I do have the field "Name", I checked and  i did't mistyped either

Thanks for your detail reply

JenniferNery · Answer

Is `NAME` a field name in the service? If you use a name that does not exist on server you will get the same error:

For example, when if I mistyped with `NAM` for `NAME`: http://sampleserver6.arcgisonline.com/arcgis/rest/services/Notes/FeatureServer/0/query?where=NAM+LIKE+%27%25o%25%27&objectIds=&time=&geometry=&geometryType=esriGeometryEnvelope&inSR=&spatialRel=esriSpatialRelIntersects&distance=&units=esriSRUnit_Foot&relationParam=&outFields=&returnGeometry=true&maxAllowableOffset=&geometryPrecision=&outSR=&gdbVersion=&returnDistinctValues=false&returnIdsOnly=false&returnCountOnly=false&returnExtentOnly=false&orderByFields=&groupByFieldsForStatistics=&outStatistics=&returnZ=false&returnM=false&multipatchOption=&resultOffset=&resultRecordCount=&f=html

FeatureTable.Fields should be able to give you the name to use in your query, it includes the same metadata found on server (i.e. FieldType, Name, Alias, IsEditable, etc).

xiaoguangyan · Answer

I notice that some featureserver with different  Advanced Query Capabilities，some having all the Advanced Query Capabilities true supports can ServiceFeatureTable.QueryFeaturesAsync(QueryParameters parameters, QueryFeatureFields queryFeatureFields) with setting QueryParameters.MaxFeatures , does this Advanced Query Capabilities matters?