LineInput Function

LineInput Function

Class

Microsoft.VisualBasic.FileSystem

Syntax

     Dim result As String = LineInput(fileNumber)

filenumber (required; Integer): Any valid file number of a file opened with FileOpen

Description

The LineInput function returns a single line of text from a file opened in Input mode. Single lines are delimited by carriage returns (vbCr) or carriage return/line-feed pairs (vbCrLf). The line-delimiting characters are not included in the returned string.

Usage at a Glance

After reading a line, the file pointer advances to the first character after the end of the line, or to the end of file if there are no more lines.
Data read with the LineInput function is normally written to the source file with the Print and PrintLine procedures.

Example

The following code reads all of the lines in a text file and sends them to the Output window:

     Dim fileID As Integer = FreeFile(  )     FileOpen(fileID, "c:\data.txt", OpenMode.Input, OpenAccess.Read)     Do While Not EOF(fileID)        Console.WriteLine(LineInput(fileID))     Loop     FileClose(fileID)

Version Differences

The LineInput function differs syntactically from the LineInput statement used in VB 6.
In Visual Basic 2005, the My.Computer.FileSystem object provides more robust access to file-management features.