| Description |
The Create method should really have been named CreateFile so as to distinguish from the Create constructor (as is the case in DirectoryInfo.CreateDirectory).
It creates the file whose name was specified in the PathString value, returning a FileStream object allowing access to the file.
Optionally, the BufferSize may be specified.
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| | Notes | Important : you must prefix Create with an & to distinguish from the Create keyword.
Important : you should assign the result of the Create to a variable and close that stream before using other methods such as CopyTo. Otherwise you will get an IO Exception to say that the file is in use!
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| Microsoft MSDN Links |
System.IO
System.IO.File
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| A simple example |
// Full Unit code.
// -------------------------------------------------------------
// Create a new WinForm application, double click the form to
// create an OnLoad event, and then replace the WinForm unit
// with this text.
unit WinForm;
interface
uses
System.Drawing, System.Collections, System.ComponentModel,
System.Windows.Forms, System.Data;
type
TWinForm = class(System.Windows.Forms.Form)
\{REGION 'Designer Managed Code'\} // Note that REGION and ENREGION should be prefixed by a dollar sign
strict private
///
/// Required designer variable.
///
Components: System.ComponentModel.Container;
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
procedure InitializeComponent;
procedure TWinForm_Load(sender: System.Object; e: System.EventArgs);
{ENDREGION}
strict protected
///
/// Clean up any resources being used.
///
procedure Dispose(Disposing: Boolean); override;
private
{ Private Declarations }
public
constructor Create;
end;
[assembly: RuntimeRequiredAttribute(TypeOf(TWinForm))]
implementation
\{REGION 'Windows Form Designer generated code'\}
///
/// Required method for Designer support -- do not modify
/// the contents of this method with the code editor.
///
procedure TWinForm.InitializeComponent;
begin
//
// TWinForm
//
Self.AutoScaleBaseSize := System.Drawing.Size.Create(5, 13);
Self.ClientSize := System.Drawing.Size.Create(292, 266);
Self.Name := 'TWinForm';
Self.Text := 'WinForm';
Include(Self.Load, Self.TWinForm_Load);
end;
{ENDREGION}
procedure TWinForm.Dispose(Disposing: Boolean);
begin
if Disposing then
begin
if Components <> nil then
Components.Dispose();
end;
inherited Dispose(Disposing);
end;
constructor TWinForm.Create;
begin
inherited Create;
//
// Required for Windows Form Designer support
//
InitializeComponent;
//
// TODO: Add any constructor code after InitializeComponent call
//
end;
procedure TWinForm.TWinForm_Load(sender: System.Object; e: System.EventArgs);
program Project1;
{$APPTYPE CONSOLE}
uses
System.IO;
var
Path : String;
Stream : StreamWriter;
Files : Array of String;
i : Integer;
begin
// List files in the current folder
Files := System.IO.Directory.GetFiles(Directory.GetCurrentDirectory);
for i := 0 to Length(Files)-1 do
Console.WriteLine(System.IO.Path.GetFileName(Files[i]));
// Create the DelphiBasics.txt file
Console.WriteLine;
Console.WriteLine('Creating DelphiBasics.txt :');
Path := 'DelphiBasics.txt';
Stream := System.IO.File.CreateText(Path);
// Close the file
Stream.Close;
// List files in the current folder again
Console.WriteLine;
Files := System.IO.Directory.GetFiles(Directory.GetCurrentDirectory);
for i := 0 to Length(Files)-1 do
Console.WriteLine(System.IO.Path.GetFileName(Files[i]));
// Clean up - delete the new file
System.IO.File.Delete(Path);
Console.Readline;
end.
end. | | Hide full unit code | Project1.exe
Project1.pdb
Project1.rsp
Creating DelphiBasics.txt :
DelphiBasics.txt
Project1.exe
Project1.pdb
Project1.rsp
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