public static void Run()
{
//ExStart: RemoveLayersFromFileGdbDataset
// -- copy test dataset, to avoid modification of test data.
//var datasetPath = GetOutputPath(".gdb");
var path = RunExamples.GetDataDir() + "ThreeLayers.gdb";
var datasetPath = RunExamples.GetDataDir() + "RemoveLayersFromFileGdbDataset_out.gdb";
RunExamples.CopyDirectory(path, datasetPath);
// --
using (var dataset = Dataset.Open(datasetPath, Drivers.FileGdb))
{
Console.WriteLine(dataset.CanRemoveLayers); // True
Console.WriteLine(dataset.LayersCount); // 3
// remove layer by index
dataset.RemoveLayerAt(2);
Console.WriteLine(dataset.LayersCount); // 2
// remove layer by name
dataset.RemoveLayer("layer1");
Console.WriteLine(dataset.LayersCount); // 1
}
//ExEnd: RemoveLayersFromFileGdbDataset
}
public static void Run()
{
//ExStart: AddLayerToFileGdbDataset
// -- copy test dataset, to avoid modification of test data.
var path = RunExamples.GetDataDir() + "ThreeLayers.gdb";
var datasetPath = RunExamples.GetDataDir() + "AddLayerToFileGdbDataset_out.gdb";
RunExamples.CopyDirectory(path, datasetPath);
// --
using (var dataset = Dataset.Open(datasetPath, Drivers.FileGdb))
{
Console.WriteLine(dataset.CanCreateLayers); // True
using (var layer = dataset.CreateLayer("data", SpatialReferenceSystem.Wgs84))
{
layer.Attributes.Add(new FeatureAttribute("Name", AttributeDataType.String));
var feature = layer.ConstructFeature();
feature.SetValue("Name", "Name_1");
feature.Geometry = new Point(12.21, 23.123, 20, -200);
layer.Add(feature);
}
using (var layer = dataset.OpenLayer("data"))
{
Console.WriteLine(layer.Count); // 1
Console.WriteLine(layer[0].GetValue <string>("Name")); // "Name_1"
}
}
//ExEnd: AddLayerToFileGdbDataset
}
public static void Run()
{
//ExStart: ConvertGeoJsonLayerToLayerInFileGdbDataset
var geoJsonPath = RunExamples.GetDataDir() + "ConvertGeoJsonLayerToLayerInFileGdbDataset_out.json";
using (VectorLayer layer = VectorLayer.Create(geoJsonPath, Drivers.GeoJson))
{
layer.Attributes.Add(new FeatureAttribute("name", AttributeDataType.String));
layer.Attributes.Add(new FeatureAttribute("age", AttributeDataType.Integer));
Feature firstFeature = layer.ConstructFeature();
firstFeature.Geometry = new Point(33.97, -118.25);
firstFeature.SetValue("name", "John");
firstFeature.SetValue("age", 23);
layer.Add(firstFeature);
Feature secondFeature = layer.ConstructFeature();
secondFeature.Geometry = new Point(35.81, -96.28);
secondFeature.SetValue("name", "Mary");
secondFeature.SetValue("age", 54);
layer.Add(secondFeature);
}
// --
// -- copy test dataset, to avoid modification of test data.
var sourceFile = RunExamples.GetDataDir() + "ThreeLayers.gdb";
var destinationFile = RunExamples.GetDataDir() + "ThreeLayersCopy_out.gdb";
RunExamples.CopyDirectory(sourceFile, destinationFile);
// --
using (var geoJsonLayer = VectorLayer.Open(geoJsonPath, Drivers.GeoJson))
{
using (var fileGdbDataset = Dataset.Open(destinationFile, Drivers.FileGdb))
using (var fileGdbLayer = fileGdbDataset.CreateLayer("new_layer", SpatialReferenceSystem.Wgs84))
{
fileGdbLayer.CopyAttributes(geoJsonLayer);
foreach (var feature in geoJsonLayer)
{
fileGdbLayer.Add(feature);
}
}
}
//ExEnd: ConvertGeoJsonLayerToLayerInFileGdbDataset
}
private static void ModifyFeaturesInDataset()
{
// -- copy test dataset, to avoid modification of test data.
var path = Path.Combine(RunExamples.GetDataDir(), "ThreeLayers.gdb");
var datasetPath = RunExamples.GetDataDir() + "ModifyFeaturesInDataset_out.gdb";
RunExamples.CopyDirectory(path, datasetPath);
// --
//ExStart: ModifyFeaturesInDataset
using (Dataset dataset = Dataset.Open(datasetPath, Drivers.FileGdb))
{
using (var source = dataset.OpenLayer("layer2"))
using (var result = dataset.CreateLayer("modified", source.SpatialReferenceSystem))
{
result.CopyAttributes(source);
foreach (var feature in source)
{
// modify the geometry
var modifiedGeometry = feature.Geometry.GetBuffer(2.0);
feature.Geometry = modifiedGeometry;
// modify a feature attribute
var attributeValue = feature.GetValue <double>("Value");
var modifiedAttributeValue = attributeValue * 2;
feature.SetValue("Value", modifiedAttributeValue);
result.Add(feature);
}
}
// optional: remove the source layer from the dataset
dataset.RemoveLayer("layer2");
}
//ExEnd: ModifyFeaturesInDataset
}
