| Description |
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A StreamWriter object is returned allowing write access to the file specified in PathString, position starting at the end of the current file contents.
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| | References | StreamWriter
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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;
Reader : System.IO.StreamReader;
Writer : System.IO.StreamWriter;
MyByte : Integer;
begin
// Open the file for writing
Path := 'C:\DelphiBasics.txt';
Writer := System.IO.File.CreateText(Path);
// Write to the file
Writer.Write('A');
Writer.Write('B');
Writer.Write('C');
// Close the file
Writer.Close;
// Open the file for appending to
Writer := System.IO.File.AppendText(Path);
// Write some more lines to the file
Writer.Write('D');
Writer.Write('E');
// Close the file
Writer.Close;
// Re-open for reading
Reader := System.IO.File.OpenText(Path);
// Display the contents
Console.WriteLine(Reader.ReadToEnd);
// Close the file
Reader.Close;
Console.Readline;
end.
end. | | Hide full unit code | ABCDE
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