Visual Basic Language Reference  

Write, WriteLine Functions

Writes data to a sequential file. Data written with Write is usually read from a file with Input.

Public Sub Write( _
   ByVal FileNumber As Integer, _
   ByVal ParamArray Output As Object _
)

-or-

Public Sub WriteLine( _
   ByVal FileNumber As Integer, _
   ByVal ParamArray Output() As Object _
)

Parameters

FileNumber
Required. An Integer expression containing any valid file number.
Output
Optional. One or more comma-delimited expressions to write to a file.

Exceptions/Errors

Exception type Error number Condition
IOException 52 FileNumber does not exist.
IOException 54 File mode is invalid.

Remarks

If you omit Output, a blank line is printed to the file. Multiple expressions can be separated with a comma.

Unlike the Print function, the Write function inserts commas between items and quotation marks around strings as they are written to the file. You don't have to put explicit delimiters in the list. When Write is used to write data to a file, only the following data formats are supported and several universal assumptions are followed so the data can always be read and correctly interpreted using Input, regardless of locale:

WriteLine inserts a newline character (that is, a carriage return–linefeed, or Chr(13) + Chr(10)), after it has written the final character in Output to the file.

Note   You should not write strings that contain embedded quotation marks for use with the Input function (for example, "1,2""X"): the Input function parses this string as two complete and separate strings.

Example

This example uses the Write function to write raw data to a sequential file.

FileOpen(1, "TESTFILE", OpenMode.Output) ' Open file for output.
Write(1, "This is a test.")  ' Print text to file.
WriteLine(1)  ' Print blank line to file.
WriteLine(1, "Zone 1", TAB(), "Zone 2")   ' Print in two print zones.
WriteLine(1, "Hello", " ", "World")     ' Separate strings with space.
WriteLine(1, SPC(5), "5 leading spaces ")    ' Print five leading spaces.
WriteLine(1, TAB(10), "Hello")   ' Print word at column 10.

' Assign Boolean, Date, and Error values.
Dim aBool As Boolean
Dim aDate As DateTime
aBool = False
aDate = DateTime.Parse("February 12, 1969")

' Dates and Booleans are translated using locale settings of 
' your system.
WriteLine(1, aBool, " is a Boolean value")
WriteLine(1, aDate, " is a date")
FileClose(1)   ' Close file.

See Also

Input Function | FileOpen Function | Print, PrintLine Functions | File Access with Visual Basic Run-Time Functions| IOException