Method PopulateFromServiceAsync

PopulateFromServiceAsync(QueryParameters, Boolean, Nullable<IEnumerable<String>>)

Queries the feature service and places the resulting features in the local table, which is cached for the duration of the session. The ServiceFeatureTable must have its FeatureRequestMode set to ManualCache.

Declaration
public Task<FeatureQueryResult> PopulateFromServiceAsync(QueryParameters parameters, bool clearCache, IEnumerable<string>? outFields)
Parameters
Type Name Description
QueryParameters parameters

The QueryParameters used to filter feature results.
System.Boolean clearCache

If true, then ClearCache(Boolean) will be called before populating the local table. If false, the resulting features will be appended to the local table.
System.Nullable<IEnumerable<String>> outFields

An containing . Each string is the name of a field to be used when populating the cache. If the array contains the single element "*", then all fields will be used. If the ObjectID field string name is not provided as part of the , no features will be returned for this method.
Returns
Type Description
Task<FeatureQueryResult>

A task that represents the asynchronous populate from service operation. The value of the task result is a FeatureQueryResult object.
Remarks

This method is useful for non-geographic data. It's also helpful when you want to avoid accessing the service for a feature whose geometry is in the current extent of the map or scene.

Specifying null or an empty for the outfields results in the minimum set of fields being used when populating the local table. This is the same set of attributes described for OnInteractionCache or OnInteractionNoCache.

Applies to

Platforms and versions
TargetVersions
UWP100.15

PopulateFromServiceAsync(QueryParameters, Boolean, Nullable<IEnumerable<String>>, CancellationToken)

Asynchronously performs manual query of data from the service and imports feature results into the table.

Declaration
public Task<FeatureQueryResult> PopulateFromServiceAsync(QueryParameters parameters, bool clearCache, IEnumerable<string>? outFields, CancellationToken cancellationToken)
Parameters
Type Name Description
QueryParameters parameters

The QueryParameters used to filter feature results.
System.Boolean clearCache

A value indicating whether to clear cache before populating the table.
System.Nullable<IEnumerable<String>> outFields

The attribute fields to include in the result.
CancellationToken cancellationToken

A cancellation token that can be used by other objects or threads to receive notice of cancellation.
Returns
Type Description
Task<FeatureQueryResult>

A task that represents the asynchronous populate from service operation. The value of the task result is a FeatureQueryResult object.

Applies to

Platforms and versions
TargetVersions
UWP100.15