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FileSystem.FileClose(Int32[]) Method

  • Reference

Definition

Namespace:
Microsoft.VisualBasic
Assembly:
Microsoft.VisualBasic.Core.dll
Assembly:
Microsoft.VisualBasic.dll
Source:
FileSystem.vb
Source:
FileSystem.vb
Source:
FileSystem.vb

Concludes input/output (I/O) to a file opened using the FileOpen function. My gives you better productivity and performance in file I/O operations. See FileSystem for more information.

public:
 static void FileClose(... cli::array <int> ^ FileNumbers);
public static void FileClose (params int[] FileNumbers);
static member FileClose : int[] -> unit
Public Sub FileClose (ParamArray FileNumbers As Integer())

Parameters

FileNumbers
Int32[]

Optional. Parameter array of 0 or more channels to be closed.

Exceptions

IOException

FileNumber does not exist.

Examples

This example uses the FileClose function to close a file opened for Input.

Dim TextLine As String
FileOpen(1, "TESTFILE", OpenMode.Input)   ' Open file.
Do While Not EOF(1)   ' Loop until end of file.
    TextLine = LineInput(1)   ' Read line into variable.
    MsgBox(TextLine)   ' Display the line
Loop
FileClose(1)   ' Close file.

Remarks

The FileClose function is provided for backward compatibility and may affect performance. For non-legacy applications, the My.Computer.FileSystem object provides better performance. For more information, see How to: Read Text from Files with a StreamReader, How to: Write Text to Files with a StreamWriter, and Walkthrough: Manipulating Files and Directories in Visual Basic.

If you omit FileNumbers, all active files opened by the FileOpen function are closed.

When you close files that were opened for Output or Append, the final buffer of output is written to the operating system buffer for that file. All buffer space associated with the closed file is released.

When the FileClose function is executed, the association of a file with its file number ends.

Applies to

See also