[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'db' (#fcl)

TField.IsNull

Is the field empty

Declaration

Source position: db.pas line 416

public property TField.IsNull : Boolean
  read GetIsNull;

Description

IsNull is True if the field does not have a value. If the underlying data contained a value, or a value is written to it, IsNull will return False. After TDataset.Insert is called or Clear is called then IsNull will return True.

See also

TField.Clear

  

Clear the field contents.

TDataset.Insert

  

Insert a new record at the current position.


Documentation generated on: Nov 14 2015