ArcObjects Library Reference (GeoDatabase)

IField Interface

Provides access to members that return information about the field. Note: the IField interface has been superseded byIField2. Please consider using the more recent version.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Description

The field object represents a column in a table. A field has many properties, the most obvious ones being its name and its datatype. The esriFieldType enumeration lists the possible datatypes.

Members

		Description
	AliasName	The alias name of the field.
	CheckValue	Indicates if the value is valid given the field definition.
	DefaultValue	The default value of the field.
	Domain	The default domain of the field.
	DomainFixed	Indicates if the field's domain is fixed.
	Editable	Indicates if the field is editable.
	GeometryDef	The geometry definition for the field if IsGeometry is TRUE.
	IsNullable	Indicates if the field can contain null values.
	Length	The maximum length, in bytes, for values described by the field.
	Name	The name of the field.
	Precision	The precision for field values.
	Required	Indicates if the field is required.
	Scale	The scale for field values.
	Type	The type of the field.
	VarType	The VARTYPE of the field (e.g. VT_I4).

CoClasses that implement IField

CoClasses and Classes	Description
Field	ESRI Field object.

Remarks

When you create a field of type esriFieldTypeSingle, esriFieldTypeDouble or esriFieldTypeInteger, and specify zero for precision and scale, the geodatabase will attempt to create a binary type field if the underlying database supports it. Personal geodatabases support only binary type fields. ArcGIS ignores precision and scale of binary type fields.


The length property of a field has meaning only for esriFieldTypeString fields. The length property for all other field types is not important and will be ignored if specified.

.NET Snippets

Write Blob Field Contents To File | Create FeatureClass | Create Table | Write Blob File Contents To Table Row Field |

.NET Samples

ArcGIS GPConsole (Code Files: Program) | Bind a geodatabase table to a .NET control (Code Files: FieldPropertyDescriptor TableWrapper) | Calculate area geoprocessing function tool (Code Files: CalculateAreaFunction) | Convert part to feature command (Code Files: ConvertPart) | Create a custom raster type (Code Files: ThumbnailBuilder) | Displaying MapTips in the MapControl (Code Files: MapTips) | Export any network analysis class to a text file (Code Files: NAClassToTextfileCmd) | Find the closest intersection from a point (Code Files: FindClosestIntersection) | Geoprocessing field mapping (Code Files: FieldMapping) | Import signposts (Code Files: SignpostUtilities) | Retrieve a color ramp from the SymbologyControl (Code Files: SymbolForm) | Route application using the NAServer extension in ArcGIS Server via a GIS client (Code Files: Route_GISClientClass) | Server spatial query COM utility (Code Files: VegUtils_VBNet) | Server spatial query server object extension (Code Files: Configurator Extension) | Simple point plug-in data source (Code Files: SimplePointCursor SimplePointDataset) | Single line address geocoding (Code Files: SingleLineGeocodingForm) | StreetMap routing (Code Files: RoutingForm) | Timestamper class extension (Code Files: TimestampClassDescription TimestampClassExtension TimestampPropertyPage) |

.NET Related Topics