Represents a mechanism to create a
ArcGIS.Core.Data.Field.
64-bit Integer field
FieldDescription bigIntegerFieldDescription = new FieldDescription("BigInteger_64", FieldType.BigInteger);
ObjectID field
// 64-bit
FieldDescription oidFieldDescription_64 = new FieldDescription("ObjectID_64", FieldType.OID)
{
Length = 8
};
// 32-bit
FieldDescription oidFieldDescription_32 = new FieldDescription("ObjectID_32", FieldType.OID)
{
Length = 4
};
DateOnly, TimeOnly, and TimestampOffset field
// Earthquake occurrences date and time
// 9/28/2014 (DateOnly)
FieldDescription earthquakeDateOnlyFieldDescription = new FieldDescription("Earthquake_DateOnly", FieldType.DateOnly);
// 1:16:42 AM (TimeOnly)
FieldDescription earthquakeTimeOnlyFieldDescription = new FieldDescription("Earthquake_TimeOnly", FieldType.TimeOnly);
// 9/28/2014 1:16:42.000 AM -09:00 (Timestamp with Offset)
FieldDescription earthquakeTimestampOffsetFieldDescription = new FieldDescription("Earthquake_TimestampOffset_Local", FieldType.TimestampOffset);
// 9/28/2014 1:16:42 AM (DateTime)
FieldDescription earthquakeDateFieldDescription = new FieldDescription("Earthquake_Date", FieldType.Date);
Creating a FeatureDataset with a FeatureClass in one operation
public void CreateFeatureDatasetWithFeatureClassSnippet(Geodatabase geodatabase)
{
// Creating a FeatureDataset named as 'Parcel_Information' and a FeatureClass with name 'Parcels' in one operation
string featureDatasetName = "Parcel_Information";
string featureClassName = "Parcels";
SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);
// Create a FeatureDataset token
FeatureDatasetDescription featureDatasetDescription = new FeatureDatasetDescription(featureDatasetName, SpatialReferences.WGS84);
FeatureDatasetToken featureDatasetToken = schemaBuilder.Create(featureDatasetDescription);
// Create a FeatureClass description
FeatureClassDescription featureClassDescription = new FeatureClassDescription(featureClassName,
new List<FieldDescription>()
{
new FieldDescription("Id", FieldType.Integer),
new FieldDescription("Address", FieldType.String)
},
new ShapeDescription(GeometryType.Point, SpatialReferences.WGS84));
// Create a FeatureClass inside a FeatureDataset
FeatureClassToken featureClassToken = schemaBuilder.Create(new FeatureDatasetDescription(featureDatasetToken), featureClassDescription);
// Build status
bool buildStatus = schemaBuilder.Build();
// Build errors
if (!buildStatus)
{
IReadOnlyList<string> errors = schemaBuilder.ErrorMessages;
}
}
Creating a FeatureClass in existing FeatureDataset
public void CreateFeatureClassInsideFeatureDatasetSnippet(Geodatabase geodatabase)
{
// Creating a FeatureClass named as 'Tax_Jurisdiction' in existing FeatureDataset with name 'Parcels_Information'
string featureDatasetName = "Parcels_Information";
string featureClassName = "Tax_Jurisdiction";
// Create a FeatureClass description
FeatureClassDescription featureClassDescription = new FeatureClassDescription(featureClassName,
new List<FieldDescription>()
{
new FieldDescription("Tax_Id", FieldType.Integer),
new FieldDescription("Address", FieldType.String)
},
new ShapeDescription(GeometryType.Point, SpatialReferences.WGS84));
FeatureDatasetDefinition featureDatasetDefinition = geodatabase.GetDefinition<FeatureDatasetDefinition>(featureDatasetName);
SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);
// Create a FeatureClass inside a FeatureDataset using a FeatureDatasetDefinition
schemaBuilder.Create(new FeatureDatasetDescription(featureDatasetDefinition), featureClassDescription);
// Build status
bool buildStatus = schemaBuilder.Build();
// Build errors
if (!buildStatus)
{
IReadOnlyList<string> errors = schemaBuilder.ErrorMessages;
}
}
Removing fields from a Table
public void RemoveFieldTableSnippet(Geodatabase geodatabase)
{
// Removing all fields from 'Parcels' table except following
// Tax_Code
// Parcel_Address
// The table to remove fields
string tableName = "Parcels";
TableDefinition tableDefinition = geodatabase.GetDefinition<TableDefinition>(tableName);
IReadOnlyList<Field> fields = tableDefinition.GetFields();
// Existing fields from 'Parcels' table
Field taxCodeField = fields.First(f => f.Name.Equals("Tax_Code"));
Field parcelAddressField = fields.First(f => f.Name.Equals("Parcel_Address"));
FieldDescription taxFieldDescription = new FieldDescription(taxCodeField);
FieldDescription parcelAddressFieldDescription = new FieldDescription(parcelAddressField);
// Fields to retain in modified table
List<FieldDescription> fieldsToBeRetained = new List<FieldDescription>()
{
taxFieldDescription, parcelAddressFieldDescription
};
// New description of the 'Parcels' table with the 'Tax_Code' and 'Parcel_Address' fields
TableDescription modifiedTableDescription = new TableDescription(tableName, fieldsToBeRetained);
SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);
// Remove all fields except the 'Tax_Code' and 'Parcel_Address' fields
schemaBuilder.Modify(modifiedTableDescription);
schemaBuilder.Build();
}
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3 or higher.