Delphi TRichEdit to Array and local storage - arrays

Question

I'm looking for informations on how to put TRichEdit into an Array and save it to Local file (ex: File.dat).
The goal is to store a number of text, with a description, and the 'name' of it.
I think I have to start with:
type
TMessage = record
Name : string;
Desc : string;
Text : TMemoryStream;
end;
var ARListMessages: array[1..50] of TMessage
And add data with something like:
richedit.Lines.SaveToStream( ARListMessages[i].Text );
How to create the Array, and make manipulations on it (Add, remove
...) with the 'name'?
How can I save it (Array), and load it easily from local storage ? (Ex:
File.dat)
I've found some informations here, without beeing able to make something working.
Thanks for your time.
[EDIT 18/09/2017]
I'm Still looking to find a solution, and try to find a way to save my informations to a local file.
My actual code to test is :
var
MessageArray : array of TMessage;
// // // //
SetLength(MessageArray, 1);
MessageArray[0].Name := 'Hey You';
MessageArray[0].Desc := 'Im here and will stay here, just in case';
MessageArray[0].Text := TMemoryStream.Create;
MessageArray[0].Text.Position := 0;
RichEdit1.plaintext := false;
RichEdit1.Lines.SaveToStream( MessageArray[0].Text );
So, looking to save MessageArray, but haven't find how to do that yet.
I've take a look on SuperObjet, but can't find how to deal with it.
Omxl was looking Great and easy, but free trial ... :(

Answer 1

I've been able to have an answer.
I share it here if someone need the solution.
program Project1;
{$APPTYPE CONSOLE}
{$R *.res}
uses
System.SysUtils, System.Generics.Collections, Classes, System.Zip;
type
TPersonne = class
strict private
FNom : string;
FPrenom: string;
public
property Nom: string read FNom write FNom;
property Prenom: string read FPrenom write FPrenom;
end;
TFamille = class(TDictionary<string, TPersonne>)
private
procedure LoadFromStream(stream: TStream);
procedure SaveToStream(stream: TStream);
public
procedure LoadFromFile(const AFileName: string);
procedure SaveToFile(const AFileName: string);
end;
procedure TFamille.SaveToStream(stream: TStream);
var
i: Integer;
Personne: TPersonne;
Pair: System.Generics.Collections.TPair<string, TPersonne>;
Writer: TWriter;
begin
Writer := TWriter.Create(stream, 4096);
try
Writer.WriteListBegin;
for Pair in Self do
begin
Writer.WriteString(Pair.Key);
Writer.WriteListBegin;
Personne := Pair.Value;
Writer.WriteString(Personne.Nom);
Writer.WriteString(Personne.Prenom);
Writer.WriteListEnd;
end;
Writer.WriteListEnd;
finally
Writer.Free;
end;
end;
procedure TFamille.LoadFromStream(stream: TStream);
var
Personne: TPersonne;
Reader: TReader;
sKey: string;
begin
Clear;
Reader := TReader.Create(stream, 1024);
try
Reader.ReadListBegin;
while not Reader.EndOfList do
begin
sKey := Reader.ReadString;
Personne := TPersonne.Create;
Reader.ReadListBegin;
while not Reader.EndOfList do
begin
Personne.Nom := Reader.ReadString;
Personne.Prenom := Reader.ReadString;
end;
Reader.ReadListEnd;
Add(sKey, Personne);
end;
Reader.ReadListEnd;
finally
Reader.Free;
end;
end;
procedure TFamille.LoadFromFile(const AFileName: string);
var
Stream: TStream;
begin
Stream := TFileStream.Create(AFileName, fmOpenRead);
try
LoadFromStream(Stream);
finally
Stream.Free;
end;
end;
procedure TFamille.SaveToFile(const AFileName: string);
var
stream: TStream;
begin
stream := TFileStream.Create(AFileName, fmCreate);
try
SaveToStream(stream);
finally
stream.Free;
end;
end;
var
Famille: TFamille;
Personne: TPersonne;
begin
try
Famille := TFamille.Create;
try
Personne := TPersonne.Create;
Personne.Nom := 'Julie';
Personne.Prenom := 'Albertine';
Famille.Add('1', Personne);
Famille.SaveToFile('D:\famille.txt');
finally
FreeAndNil(Famille);
end;
Famille := TFamille.Create;
try
Famille.LoadFromFile('D:\famille.txt');
if Famille.Count > 0 then
Writeln(Famille['1'].Nom + ' ' + Famille['1'].Prenom);
finally
FreeAndNil(Famille);
end;
Readln;
except
on E: Exception do
Writeln(E.ClassName, ': ', E.Message);
end;
end.
Thanks all for your Help !

Answer 2

How to create the Array, and make manipulations on it (Add, remove
...) with the 'name'?
From your first code the array is already created. No further work is needed. And even if you use dynamic arrays you still don't have to do any thing just declaring it will suffice.
If you are asking "How to create the array ?" as in "How to create such a list, so I could add, remove with the 'name' field" then I would suggest TDictionary (instead of the city names use your field 'name' as a key) to do the manipulations and then when saving use this
How can I save it (Array), and load it easily from local storage ?
(Ex: File.dat)
You can't directly just like array.savetofile;.You need to use one of file handling methods like TFileStream to store the array.
Note: in your edit the memory stream will cause you only trouble because each time you create it you will need to free it after its use instead use these functions to extract formatted text and change the field Text : TMemoryStream; to Text : string;
RichTextToStr: Convert the rich format text to a string.
function RichTextToStr(RichEdit:TRichEdit):string;
var
SS : TStringStream;
begin
SS := TStringStream.Create('');
try
RichEdit.Lines.SaveToStream(SS);
Result := SS.DataString;
finally
SS.Free;
end;
end;
loadToRichedit: Load the formatted text to the RichEdit again.
procedure loadToRichedit(Const St:string;RichEdit:TRichEdit);
var
SS : TStringStream;
begin
SS := TStringStream.Create(St);
try
RichEdit.Lines.LoadFromStream(SS);
finally
SS.Free;
end;
end;