saving arrays to dat

Or just you can try instead of saving in a bulk file, save into a XML file. Maybe more tedious ... but a solution at all.

Edu

unit Unit2;

interface

uses Windows, SysUtils, Classes;

type
  TRec1 = record
    I : Integer;
    S : String;
  end;

  TRec2 = record
    I : Integer;
    B : Boolean;
  end;

procedure SaveToFile(FileName : String);
procedure LoadFromStream(FileName : String);

var
   Rec1 : Array [1..10] Of TRec1; // Static array
   Rec2 : Array of TRec2; // Dynamic array

implementation

procedure SaveToFile(FileName : String);
var
  I : Integer;
  FS : TFileStream;
  sSize : Integer;
  sData : String;
begin
  // Open file to write (create)
  FS := TFileStream.Create(FileName,fmCreate);

  // Save static array - we know numbers of items
  For I := 1 To 10 Do
    begin
      // Write integer
       FS.WriteBuffer(Rec1[I].I,SizeOf(Integer));

       // Write String - write length first, then write data
       sSize := Length(Rec1[I].S);
       sData := Rec1[I].S;
       FS.WriteBuffer(sSize,SizeOf(Integer));
       FS.WriteBuffer(sData[1],sSize);
    end;

  // Save dynamic array
  // Write number of items first
  sSize := Length(Rec2);
  FS.WriteBuffer(sSize,SizeOf(Integer));
  For I := Low(Rec2) To High(Rec2) Do
    begin
      FS.WriteBuffer(Rec2[I].I,SizeOf(Integer));
      FS.WriteBuffer(Rec2[I].B,SizeOf(Boolean));
    end;

  FS.Free;
end;

procedure LoadFromStream(FileName : String);
var
  I : Integer;
  FS : TFileStream;
  sSize : Integer;
  sData : String;
begin
  // Open file to read
  FS := TFileStream.Create(FileName,fmOpenRead);

  // read static array
  For I := 1 To 10 Do
    Begin
      // read integer
      FS.ReadBuffer(Rec1[I].I,SizeOf(Integer));

      // read string
      FS.ReadBuffer(sSize,SizeOf(Integer));
      SetLength(sData,sSize);
      FS.ReadBuffer(sData[1],sSize);
      Rec1[I].S := sData;
    End;

  // read dynamic array
  FS.ReadBuffer(sSize,SizeOf(Integer));
  SetLength(Rec2,sSize);
  For I := Low(Rec2) To High(Rec2) Do
    begin
      FS.ReadBuffer(Rec2[I].I,SizeOf(Integer));
      FS.ReadBuffer(Rec2[I].B,SizeOf(Boolean));
    end;

  FS.Free;
end;

end.