TWriter (Delphi)

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Description

This code example indicates how to use the TWriter class in order to write to a file using streams.

Code

uses
  System.SysUtils, System.Classes;

const
  myString =
    'This is a set of code examples illustrating the usage of TReader and TWriter';
  anotherString = 'This is another line';
  anotherStringTwo = 'And another line';

var
  FileStream: TFileStream;
  Writer: TWriter;
  I: Integer;
  myStringBuilder: TStringBuilder;

begin
  { Create the TFileStream object and the TWriter used to write data into files. }
  FileStream := TFileStream.Create
    ('C:\Users\Public\Documents\RAD Studio\stream.txt',
    fmCreate or fmOpenWrite or fmShareDenyNone);
  { $FF = 255. Used in creating the TWriter object as the second parameter : Buffer size. }
  Writer := TWriter.Create(FileStream, $FF);

  { Create the string builder }
  myStringBuilder := TStringBuilder.Create;

  { Append content to the string builder }
  myStringBuilder.Append(myString);
  myStringBuilder.AppendLine;
  myStringBuilder.Append(anotherString);
  myStringBuilder.AppendLine;
  myStringBuilder.Append(anotherStringTwo);

  { Commence writing to file }
  Writer.WriteListBegin;
  Writer.WriteString(myStringBuilder.ToString);
  Writer.WriteListEnd;

  Writer.Destroy;
  FileStream.Destroy;

end.

Uses


See Also

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