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

TField.IsValidChar

Check whether a character is valid input for the field

Declaration

Source position: db.pas line 397

public function TField.IsValidChar(

  InputChar: Char

):Boolean; virtual;

Arguments

InputChar

  

Character to check

Function result

True if InputChar is in the set ValidChars.

Description

IsValidChar checks whether InputChar is a valid characters for the current field. It does this by checking whether InputChar is in the set of characters specified by the TField.ValidChars property. The ValidChars property will be initialized to a correct set of characters by descendent classes. For instance, a numerical field will only accept numerical characters and the sign and decimal separator characters.

Descendent classes can override this method to provide custom checks. The ValidChars property can be set to restrict the list of valid characters to a subset of what would normally be available.

See also

TField.ValidChars

  

Characters that are valid input for the field's content


Documentation generated on: Jun 22 2020