What is the activeX data object (ADO) field object?

The ActiveX Data Object (ADO) module enables programs written in C++ and Visual Basic to connect to different databases and SQL servers. It includes several objects, such as the ADO field object. This object represents a column in the RecordSet object. For each column in the RecordSet, there is one Field Object.

The Field object has certain methods, properties, and collections associated with it, which are described below.

Methods

  • AppendChunk: This appends the long binary or character data to a field object.

  • GetChunk: This returns all or part of the contents of the large text or binary data field object.

Properties

  • Name: This sets or returns the name of the field object.

  • Status: This returns the status of a field object, which is a value of type FieldStatusEnum. This tells us whether fields have been added or deleted.

  • Type: This sets or returns the type of the field object of type DataTypeEnum.

  • Value: This sets or returns the value of the Field object. Its default value is on the Type property.

  • UnderlyingValue: This returns the current value of a field in the database.

  • OriginalValue: This returns the original value of a field before any changes were made to the field.

  • Precision: This sets or returns a byte value for the maximum number of digits allowed when we want to represent numeric values in a field object.

  • Attributes: This sets or returns the attributes of the field object.

  • ActualSize: This returns the actual size of a field object as a long value. It is a read-only property.

  • DefinedSize: This returns the capacity of a field object as the number of bytes in the form of a long value.

  • NumericScale: This sets or returns the total number of digits that are allowed to the right of the decimal point for numeric values in the field object as a byte value. It is normally a read-only property but may be read/write if certain properties are changed.

Collections

  • Properties: This contains all the property objects for a field object.
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