4D v13.4

Is data file locked

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4D v13.4
Is data file locked

Is data file locked 


 

Is data file locked -> Function result 
Parameter Type   Description
Function result  Boolean in 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.

Example  

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

 
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Alphabetical list of commands

 
HISTORY 

Created: 4D 2003