Parameters of the procedure used by fReadLine

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Parameters of the procedure used by fReadLine

WLanguage procedure ("Callback") called by fReadLine for each line read in the file. This procedure can be a local, global or internal procedure.

Example

// Declare the variables
FileNameAndPath is string
FileID is int
NumberLinesRead is int = 0

// Declaration of the WLanguage procedure
INTERNAL PROCÉDURE AnsiCallback(LineRead is ANSI string)
Trace("Callback | Line read: " + LineRead)
END

// Select the file name and path
FileNameAndPath = "C:\Directory\AnsiFile.txt"

// Open file
FileID = fOpen(FileNameAndPath, foAnsi)
// Display an error message if no file was opened
IF FileID = -1 THEN
Error(ErrorInfo(errMessage))
ELSE
// Read the lines of the file
NumberLinesRead = fReadLine(FileID, AnsiCallback)
IF ErrorOccurred THEN
Error(ErrorInfo())
END
Trace("Number of lines read: " + NumberLinesRead)
// Close the file
fClose(FileID)
Trace("Read operation completed")
END

Syntax

<Result> = fReadLine_Callback(<Row read>)

<Result>: Boolean

True if the line was read,
False otherwise.

<Row read>: Character string

Content of the line read in the file.

Component: wd290std.dll