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IField Interface (ArcObjects .NET 10.5 SDK)
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 Note: the IField interface has been superseded byIField2.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
Read-only property AliasName The alias name of the field.
Method CheckValue Indicates if the value is valid given the field definition.
Read-only property DefaultValue The default value of the field.
Read-only property Domain The default domain of the field.
Read-only property DomainFixed Indicates if the field's domain is fixed.
Read-only property Editable Indicates if the field is editable.
Read-only property GeometryDef The geometry definition for the field if IsGeometry is TRUE.
Read-only property IsNullable Indicates if the field can contain null values.
Read-only property Length The maximum length, in bytes, for values described by the field.
Read-only property Name The name of the field.
Read-only property Precision The precision for field values.
Read-only property Required Indicates if the field is required.
Read-only property Scale The scale for field values.
Read-only property Type The type of the field.
Read-only property 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

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

.NET Samples

Export any network analysis class to a text file (Code Files: NAClassToTextfileCmd) | Convert part to feature command (Code Files: ConvertPart) | Create a custom raster type (Code Files: ThumbnailBuilder) | Create a custom raster type from the ground up for DMCII data (Code Files: DMCIIRasterType) | Find the closest intersection from a point (Code Files: FindClosestIntersection) | Displaying MapTips in the MapControl (Code Files: MapTips) | Calculate area geoprocessing function tool (Code Files: CalculateAreaFunction) | Bind a geodatabase table to a .NET control (Code Files: FieldPropertyDescriptor TableWrapper) | StreetMap routing (Code Files: RoutingForm) | Timestamper class extension (Code Files: TimestampClassDescription TimestampClassExtension TimestampPropertyPage) | Geoprocessing field mapping (Code Files: FieldMapping) | Single line address geocoding (Code Files: SingleLineGeocodingForm) | Retrieve a color ramp from the SymbologyControl (Code Files: SymbolForm)

.NET Related Topics

Assigning domains to fields | Building a custom geoprocessing function tool | Converting simple data | Copying or loading data while preserving GlobalID values | Creating a plug-in data source | Creating an address locator | Creating annotation and dimension feature classes | Creating class extensions | Creating feature classes | Creating fields | Creating indexes | Creating relationship classes | Creating tables | Geodatabase API best practices | Geometry | Geoprocessing services | Getting a list of schema differences between replicas | How to find the address closest to a point using reverse geocoding | How to geocode a single address | How to geocode a table of addresses | How to standardize an address | How to work with geocoding properties | Migrating VB6 to VB.NET for ArcGIS 10 | Updating geometry of existing features | Using schema locks | Working with fields | Working with indexes