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
}
