Writes data to a sequential file. Data written with
Write is usually read from a file by using
public static void Write (int FileNumber, params object Output);
Integer expression that contains any valid file number.
Optional. One or more comma-delimited expressions to write to a file.
File mode is invalid.
This example uses the
Write function to write raw data to a sequential file.
' Open file for output. FileOpen(1, "TestFile.txt", OpenMode.Output) ' Print text to the file. The quotation marks will be in the display. Write(1, "This is a test.") ' Go to the next line. WriteLine(1) ' Skip a line. WriteLine(1) ' Print in two print zones. You will see commas and quotation marks ' in the output file. WriteLine(1, "Zone 1", SPC(10), "Zone 2") ' Build a longer string before calling WriteLine. WriteLine(1, "Hello" & " " & "World") ' Include five leading spaces. WriteLine(1, SPC(5), "Leading spaces") ' Print a word starting at column 10. WriteLine(1, TAB(10), "Hello") ' Assign Boolean and Date 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.") ' Close the file. FileClose(1) ' Contents of TestFile.txt '"This is a test.", ' '"Zone 1", "Zone 2" '"Hello World" ' "Leading spaces" ' ,"Hello" '"False is a Boolean value." '"2/12/1969 is a date."
WriteLine functions are provided for backward compatibility and may affect performance. For non-legacy applications, the
My.Computer.FileSystem object provides better performance. For more information, see File Access with Visual Basic.
If you omit
Output, a blank line is printed to the file. Multiple expressions can be separated with a comma.
Write function inserts commas between items and quotation marks around strings as they are written to the file. You do not have to put explicit delimiters in the list. When
Write is used to write data to a file, only numeric,
Boolean, date, null, and
Error data formats are supported. The following universal assumptions are followed so the data can always be read and correctly interpreted using
Input, regardless of locale:
Numeric data is always written using the period as the decimal separator.
#FALSE#is printed. The
Falsekeywords are not translated, regardless of locale.
Date data is written to the file using the universal date format. When either the date or the time component is missing or zero, only the part provided is written to the file.
Nothing is written to the file if
Outputdata is empty. However, for null data,
Errordata, the output appears as
#ERROR errorcode#. The
Errorkeyword is not translated, regardless of locale.
WriteLine inserts a newline character (that is, a carriage return/line feed, or
Chr(13) + Chr(10)), after it has written the final character in
Output to the file.
You can embed quotation marks in a string by using double quotation marks, or "". For example,
Dim x As String = "Double quotation marks aren't ""difficult"" to handle."
returns a string with the value of
Double quotation marks aren't "difficult" to handle.
Writing to a file by using the
WriteLine functions requires
Append access from the
FileIOPermissionAccess enumeration. For more information, see FileIOPermissionAccess .
- See Also