4D v17.4
Is data file locked
- 4D Language Reference
-
- 4D Environment
-
- Application file
- Application type
- Application version
- BUILD APPLICATION
- CHANGE LICENSES
- Compact data file
- COMPONENT LIST
- CREATE DATA FILE
- Data file
- Get 4D file
- Get 4D folder
- Get database localization
- Get database measures
- Get database parameter
- Get last update log path
- Get license info
- GET SERIAL INFORMATION
- Get table fragmentation
- Is compiled mode
- Is data file locked
- Is license available
- NOTIFY RESOURCES FOLDER MODIFICATION
- OPEN ADMINISTRATION WINDOW
- OPEN DATA FILE
- OPEN DATABASE
- OPEN SECURITY CENTER
- OPEN SETTINGS WINDOW
- PLUGIN LIST
- QUIT 4D
- RESTART 4D
- SET DATABASE LOCALIZATION
- SET DATABASE PARAMETERUpd
- SET UPDATE FOLDER
- Structure file
- VERIFY CURRENT DATA FILE
- VERIFY DATA FILE
- Version type
- _o_ADD DATA SEGMENT
- _o_DATA SEGMENT LIST
4D v17.4
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 , 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 v17)
4D Language Reference ( 4D v17.1)
4D Language Reference ( 4D v17.2)
4D Language Reference ( 4D v17.3)
4D Language Reference ( 4D v17.4)
© 1985-2020 4D SAS / 4D, Inc. All rights reserved.