4D v16.3
Is data file locked
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4D v16.3
Is data file locked
Is data file locked
| Is data file locked -> Function result | ||||||||
| Parameter | Type | Description | ||||||
| Function result | Boolean |
|
True = file/segment locked False = file/segment not locked | |||||
The Is data file locked command returns True if the data file of the open database or at least one of its segments is locked — i.e. write protected.
Placed, for instance, in the On Startup database method, this command enables the prevention of any risk of accidental opening of a locked data file.
This method will prevent the opening of the database if the data file is locked:
If(Is data file locked)
ALERT("The data file is locked. Impossible to open database.")
QUIT 4D
End if
PROPERTIES
Product: 4D
Theme: 4D Environment
Number:
716
HISTORY
Created: 4D 2003
ARTICLE USAGE
4D Language Reference ( 4D v16)
4D Language Reference ( 4D v16.1)
4D Language Reference ( 4D v16.2)
4D Language Reference ( 4D v16.3)
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