コード例 #1
0
        /// <summary>
        /// Downloads records and yields them as a lazy sequence of features of the specified type.  Possibly throws RestException.
        /// </summary>
        /// <typeparam name="T">The type the record should be mapped to.</typeparam>
        /// <param name="layerId">The layer ID of the feature layer or table.</param>
        /// <param name="whereClause">The where clause.  If set to null, returns all features.</param>
        /// <param name="extraParameters">The query string that describes any additional query parameters (i.e. outSR=4326).  Each parameter must be url encoded.</param>
        /// <param name="keepQuerying">If set to true, repetitively queries the server until all features have been returned.</param>
        /// <param name="degreeOfParallelism">The maximum number of concurrent requests.</param>
        /// <returns></returns>
        public IEnumerable <T> Download <T>(int layerId, string whereClause = null, string extraParameters = null, bool keepQuerying = false, int degreeOfParallelism = 1) where T : Feature
        {
            var layer          = GetLayer(layerId);
            var returnGeometry = typeof(T).HasGeometry();

            var featureSet = Esri.GetFeatureSet(ServiceArgs, layerId, returnGeometry, layer.hasZ, whereClause, extraParameters, null);

            foreach (var g in featureSet.features)
            {
                yield return(ToFeature <T>(g, layer));
            }

            var objectIds = featureSet.features.Select(g => Convert.ToInt32(g.attributes[layer.GetObjectIdFieldName()])).ToArray();

            if (!keepQuerying || objectIds.Length == 0)
            {
                yield break;
            }

            var remainingObjectIds = Esri.GetOIDSet(ServiceArgs, layerId, whereClause, extraParameters).objectIds.Except(objectIds);

            foreach (var f in Download <T>(layer, remainingObjectIds, returnGeometry, whereClause, extraParameters, objectIds.Length, degreeOfParallelism))
            {
                yield return(f);
            }
        }
コード例 #2
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        private Service(string url, ICredentials credentials, Token token, string gdbVersion)
        {
            ServiceArgs = new ServiceArgs(url, credentials, token, gdbVersion);

            var serviceInfo = Esri.GetServiceInfo(ServiceArgs);

            Layers  = serviceInfo.AllLayers;
            Domains = serviceInfo.AllDomains;
        }
コード例 #3
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 private IEnumerable <T> Download <T>(Layer layer, IEnumerable <int> objectIds, bool returnGeometry, string whereClause, string extraParameters, int batchSize, int degreeOfParallelism) where T : Feature
 {
     return(objectIds.Partition(batchSize)
            .AsParallel()
            .AsOrdered()
            .WithDegreeOfParallelism(degreeOfParallelism < 1 ? 1 : degreeOfParallelism)
            .SelectMany(ids => Esri.GetFeatureSet(ServiceArgs, layer.id, returnGeometry, layer.hasZ, whereClause, extraParameters, ids).features
                        .Select(g => ToFeature <T>(g, layer))));
 }
コード例 #4
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        /// <summary>
        /// Inserts the features into a layer and returns the newly created features.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="features"></param>
        /// <param name="service"></param>
        /// <param name="layerId"></param>
        /// <returns></returns>
        public static InsertResult <T> InsertInto <T>(this T[] features, Service service, int layerId) where T : Feature
        {
            try
            {
                if (features.Length == 0)
                {
                    return(new InsertResult <T>(true));
                }

                var layer = service.GetLayer(layerId);

                var adds = features.Select(f => f.ToGraphic(layer, false)).ToArray();

                var editResultInfo = Esri.ApplyEdits(service.ServiceArgs, layer.id, "adds", adds.Serialize());

                return(new InsertResult <T>(true, null, () => service.Download <T>(layerId, editResultInfo.addResults.Select(r => r.objectId), null, null, 50, 1).ToArray()));
            }
            catch (RestException restException)
            {
                return(new InsertResult <T>(false, restException));
            }
        }
コード例 #5
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        /// <summary>
        /// Updates the features in the underlying layer.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="features"></param>
        /// <returns></returns>
        public static UpdateResult Update <T>(this T[] features) where T : Feature
        {
            try
            {
                if (features.Length == 0)
                {
                    return(new UpdateResult(true));
                }

                if (features.Any(f => !f.IsDataBound))
                {
                    throw new InvalidOperationException("All features must be bound to a data source before they can be updated.");
                }

                var args  = GetUnique(features, f => f.ServiceArgs, "url and geodatabase version");
                var layer = GetUnique(features, f => f.Layer, "layer");

                var updates = features.Select(f => f.ToGraphic(layer, true)).Where(o => o != null).ToArray();

                if (updates.Length == 0)
                {
                    return(new UpdateResult(true));
                }

                Esri.ApplyEdits(args, layer.id, "updates", updates.Serialize());

                foreach (var f in features)
                {
                    f.IsDirty = false;
                }

                return(new UpdateResult(true));
            }
            catch (RestException restException)
            {
                return(new UpdateResult(false, restException));
            }
        }
コード例 #6
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        /// <summary>
        /// Deletes the features from the underlying layer.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="features"></param>
        /// <returns></returns>
        public static DeleteResult Delete <T>(this T[] features) where T : Feature
        {
            try
            {
                if (features.Length == 0)
                {
                    return(new DeleteResult(true));
                }

                if (features.Any(f => !f.IsDataBound))
                {
                    throw new InvalidOperationException("All features must be bound to a data source before they can be deleted.");
                }

                var args  = GetUnique(features, f => f.ServiceArgs, "url and geodatabase version");
                var layer = GetUnique(features, f => f.Layer, "layer");

                var deletes = string.Join(",", features.Select(f => f.OID));

                Esri.ApplyEdits(args, layer.id, "deletes", deletes);

                foreach (var f in features)
                {
                    f.ServiceArgs = null;
                    f.Layer       = null;
                    f.OID         = -1;
                    f.IsDirty     = false;
                }

                return(new DeleteResult(true));
            }
            catch (RestException restException)
            {
                return(new DeleteResult(false, restException));
            }
        }
コード例 #7
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        /// <summary>
        /// Generates a token for the service url.
        /// </summary>
        /// <param name="url"></param>
        /// <param name="userName"></param>
        /// <param name="password"></param>
        /// <param name="expiration"></param>
        /// <returns></returns>
        public static Token GenerateToken(string url, string userName, string password, int?expiration = null)
        {
            var token = Esri.GetTokenInfo(url, userName, password, expiration);

            return(new Token(token.token, Esri.BaseTime.AddMilliseconds(token.expires)));
        }