Owning Palette: Advanced File VIs and Functions
Requires: Base Development System. This topic might not match its corresponding palette in LabVIEW depending on your operating system, licensed product(s), and target.
Use the Datalog functions to open and close datalog files, read from and write to datalog files, get and set datalog file positions, and get and set the number of datalog records.
| Palette Object | Description |
|---|---|
| Close File | Closes an open file specified by refnum and returns the path to the file associated with the refnum. |
| Get Datalog Position | Returns the current datalog position of the datalog file specified by refnum. |
| Get Number of Records | Returns the size in records of the datalog file identified by refnum. |
| Open/Create/Replace Datalog | Opens an existing datalog file, creates a new datalog file, or replaces an existing datalog file, programmatically or interactively using a file dialog box. This function does not work for files inside an LLB. |
| Read Datalog | Reads records from an open datalog file specified by refnum and returns it in record(s). Reading begins at the current datalog position. Use the Set Datalog Position function to move the current datalog position of the file. |
| Set Datalog Position | Moves the current datalog position of the file identified by refnum to the datalog position indicated by offset (in records) according to the mode in from. |
| Set Number of Records | Sets the size in records of the datalog file identified by refnum. |
| Write Datalog | Writes record(s) to an open datalog file specified by refnum. Sets the current datalog position to the end of the file before writing. |