/*
Copyright 2018 Esri
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using ArcGIS.Core.Data;
using ArcGIS.Core.Geometry;
using ArcGIS.Desktop.Core;
using ArcGIS.Desktop.Editing;
using ArcGIS.Desktop.Framework.Threading.Tasks;
namespace SDKExamples.GeodatabaseSDK
{
/// <summary>
/// Illustrates how to update a feature in a FeatureClass.
/// </summary>
///
/// <remarks>
/// <para>
/// While it is true classes that are derived from the <see cref="ArcGIS.Core.CoreObjectsBase"/> super class
/// consumes native resources (e.g., <see cref="ArcGIS.Core.Data.Geodatabase"/> or <see cref="ArcGIS.Core.Data.FeatureClass"/>),
/// you can rest assured that the garbage collector will properly dispose of the unmanaged resources during
/// finalization. However, there are certain workflows that require a <b>deterministic</b> finalization of the
/// <see cref="ArcGIS.Core.Data.Geodatabase"/>. Consider the case of a file geodatabase that needs to be deleted
/// on the fly at a particular moment. Because of the <b>indeterministic</b> nature of garbage collection, we can't
/// count on the garbage collector to dispose of the Geodatabase object, thereby removing the <b>lock(s)</b> at the
/// moment we want. To ensure a deterministic finalization of important native resources such as a
/// <see cref="ArcGIS.Core.Data.Geodatabase"/> or <see cref="ArcGIS.Core.Data.FeatureClass"/>, you should declare
/// and instantiate said objects in a <b>using</b> statement. Alternatively, you can achieve the same result by
/// putting the object inside a try block and then calling Dispose() in a finally block.
/// </para>
/// <para>
/// In general, you should always call Dispose() on the following types of objects:
/// </para>
/// <para>
/// - Those that are derived from <see cref="ArcGIS.Core.Data.Datastore"/> (e.g., <see cref="ArcGIS.Core.Data.Geodatabase"/>).
/// </para>
/// <para>
/// - Those that are derived from <see cref="ArcGIS.Core.Data.Dataset"/> (e.g., <see cref="ArcGIS.Core.Data.Table"/>).
/// </para>
/// <para>
/// - <see cref="ArcGIS.Core.Data.RowCursor"/> and <see cref="ArcGIS.Core.Data.RowBuffer"/>.
/// </para>
/// <para>
/// - <see cref="ArcGIS.Core.Data.Row"/> and <see cref="ArcGIS.Core.Data.Feature"/>.
/// </para>
/// <para>
/// - <see cref="ArcGIS.Core.Data.Selection"/>.
/// </para>
/// <para>
/// - <see cref="ArcGIS.Core.Data.VersionManager"/> and <see cref="ArcGIS.Core.Data.Version"/>.
/// </para>
/// </remarks>
public class FeatureStore
{
/// <summary>
/// In order to illustrate that Geodatabase calls have to be made on the MCT
/// </summary>
/// <returns></returns>
public async Task MainMethodCode()
{
await QueuedTask.Run(async () =>
{
await EnterpriseGeodabaseWorkFlow();
await FileGeodatabaseWorkFlow();
});
}
private static async Task EnterpriseGeodabaseWorkFlow()
{
// Opening a Non-Versioned SQL Server instance.
DatabaseConnectionProperties connectionProperties = new DatabaseConnectionProperties(EnterpriseDatabaseType.SQLServer)
{
AuthenticationMode = AuthenticationMode.DBMS,
// Where testMachine is the machine where the instance is running and testInstance is the name of the SqlServer instance.
Instance = @"testMachine\testInstance",
// Provided that a database called LocalGovernment has been created on the testInstance and geodatabase has been enabled on the database.
Database = "LocalGovernment",
// Provided that a login called gdb has been created and corresponding schema has been created with the required permissions.
User = "gdb",
Password = "password",
Version = "dbo.DEFAULT"
};
using (Geodatabase geodatabase = new Geodatabase(connectionProperties))
using (FeatureClass enterpriseFeatureClass = geodatabase.OpenDataset<FeatureClass>("LocalGovernment.GDB.FacilitySite"))
{
FeatureClassDefinition facilitySiteDefinition = enterpriseFeatureClass.GetDefinition();
int ownTypeIndex = facilitySiteDefinition.FindField("OWNTYPE");
int areaIndex = facilitySiteDefinition.FindField(facilitySiteDefinition.GetAreaField());
EditOperation editOperation = new EditOperation();
editOperation.Callback(context =>
{
QueryFilter queryFilter = new QueryFilter { WhereClause = "FCODE = 'Hazardous Materials Facility' AND OWNTYPE = 'Private'" };
using (RowCursor rowCursor = enterpriseFeatureClass.Search(queryFilter, false))
{
while (rowCursor.MoveNext())
{
using (Feature feature = (Feature)rowCursor.Current)
{
// In order to update the Map and/or the attribute table.
// Has to be called before any changes are made to the row
context.Invalidate(feature);
// Transfer all Hazardous Material Facilities to the City.
feature[ownTypeIndex] = "Municipal";
if (Convert.ToDouble(feature[areaIndex]) > 50000)
{
// Set the Shape of the feature to whatever you need.
List<Coordinate2D> newCoordinates = new List<Coordinate2D>
{
new Coordinate2D(1021570, 1880583),
new Coordinate2D(1028730, 1880994),
new Coordinate2D(1029718, 1875644),
new Coordinate2D(1021405, 1875397)
};
feature.SetShape(new PolygonBuilder(newCoordinates).ToGeometry());
}
feature.Store();
// Has to be called after the store too
context.Invalidate(feature);
}
}
}
}, enterpriseFeatureClass);
bool editResult = editOperation.Execute();
// If the table is non-versioned this is a no-op. If it is versioned, we need the Save to be done for the edits to be persisted.
bool saveResult = await Project.Current.SaveEditsAsync();
}
}
// Illustrates updating a feature in a File GDB.
private static async Task FileGeodatabaseWorkFlow()
{
using (Geodatabase fileGeodatabase = new Geodatabase(new FileGeodatabaseConnectionPath(new Uri(@"C:\Data\LocalGovernment.gdb"))))
using (FeatureClass featureClass = fileGeodatabase.OpenDataset<FeatureClass>("PollingPlace"))
{
EditOperation editOperation = new EditOperation();
editOperation.Callback(context =>
{
QueryFilter queryFilter = new QueryFilter { WhereClause = "FULLADD LIKE '///%Lily Cache Ln///%'" };
using (RowCursor rowCursor = featureClass.Search(queryFilter, false))
{
while (rowCursor.MoveNext())
{
using (Feature feature = (Feature)rowCursor.Current)
{
MapPoint mapPoint = feature.GetShape() as MapPoint;
// In order to update the Map and/or the attribute table.
// Has to be called before any changes are made to the row
context.Invalidate(feature);
// Note that to update the shape, you will need to create a new Shape object.
feature.SetShape(new MapPointBuilder(mapPoint.X + 1, mapPoint.Y + 1, mapPoint.SpatialReference).ToGeometry());
feature.Store();
// Has to be called after the store too
context.Invalidate(feature);
}
}
}
}, featureClass);
bool editResult = editOperation.Execute();
// This is required to persist the changes to the disk.
bool saveResult = await Project.Current.SaveEditsAsync();
}
}
}
}
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