Freigeben über

HASVALUE Function (Media)

  • Artikel

Checks whether a Media data type field in a record has been initialized with a media object and that the specified media object exists in the database.

Syntax

HasValue := Record.MediaField.HASVALUE

Parameters

Record
Type: Record

Specifies the record that includes the media.

MediaField
Type: Media

Specifies the Media data type field of the record that includes the media.

Property Value/Return Value

Type: Boolean

true if the Media data type field has media data; otherwise, false.

Example

This example uses the HASVALUE function to iterate over the My Items table to determine whether media objects are available on records in the table.

The example assumes that My Items table exists and contains a Media data type field that is named Image. For information about importing media, see IMPORTFILE Function (Media).

The code returns a message if a record does not include a media object. To support the code, you must create the following variable:

Variable name DataType Subtype
myItemRec Record My Items 
IF myItemRec.FINDFIRST() THEN  
BEGIN  
  REPEAT  
    If NOT myItemRec.Image.HASVALUE THEN  
      ERROR('Item %1 does not have a valid image', myItemRec."No.");  
  UNTIL myItemRec.NEXT < 1;  
END;

See Also

Working With Media on Records
IMPORTFILE Function (Media)
IMPORTSTREAM Function (Media)
EXPORTFILE Function (Media)
EXPORTSTREAM Function (Media)
MediaSet Data Type