unitfrmmain.pas

《Delphi百例》源码?禗elphi百例》源码

unit unitFrmMain;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, ComCtrls, FileCtrl;

type
  TForm1 = class(TForm)
    OpenDialog1: TOpenDialog;
    SaveDialog1: TSaveDialog;
    UpDown1: TUpDown;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    ListBox1: TListBox;
    Edit2: TEdit;
    Edit3: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Edit1: TEdit;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}
//选择待分割的文件

procedure TForm1.Button1Click(Sender: TObject);
begin
  if OpenDialog1.Execute then
    begin
      Edit2.Text := OpenDialog1.FileName;
    end;
end;

//设置分割后的分卷文件的存储位置

procedure TForm1.Button2Click(Sender: TObject);
var
  Dir: string;
begin
  if SelectDirectory('选择存储目录:', '', Dir) then
    begin
      Edit3.Text := Dir + '\';
    end;

end;

//分割文件为分卷文件，自动命名

procedure TForm1.Button3Click(Sender: TObject);
var
  I, K, Rest, Len: Integer;
  AF, BF: TFileStream; //文件流对象
  Fn: string; //文件名
  Buf: Integer; //单碟容量
begin

  if (Edit2.Text = '') or (Edit3.Text = '') then
    begin
      Beep;
      Exit;
    end;
  //单碟容量计算为字节数

  buf := StrToInt(Edit1.Text) * 1024;
  I := 1;
  try
    Af := TFileStream.Create(Edit2.Text, fmOpenRead);
    K := Af.Size div Buf;
    Rest := Af.Size - K * Buf;
    for I := 1 to K do
      begin
        Fn := Edit3.Text + IntToStr(I) + '.spt'; //文件名
        Bf := TFileStream.Create(Fn, fmCreate);
        Bf.CopyFrom(Af, Buf);
        ListBox1.Items.Add(Fn);
        Bf.Free;
      end;
    if Rest > 0 then
      begin
        Fn := Edit3.Text + IntToStr(I) + '.spt';
        Bf := TFileStream.Create(Fn, fmCreate);
        Bf.CopyFrom(Af, Rest);
        Bf.Free;
        ListBox1.Items.Add(Fn);
      end;
  finally
    AF.Free;
  end;

end;

//将分割后的分卷文件在列表框中显示

procedure TForm1.Button4Click(Sender: TObject);
var
  I: Integer;
begin
  if OpenDialog1.Execute then
    for I := 0 to OpenDialog1.Files.Count - 1 do
      ListBox1.Items.Add(OpenDialog1.files[I]);
end;

//合并分卷文件并保存合并结果

procedure TForm1.Button5Click(Sender: TObject);
var
  Af, Bf: TFileStream; //文件流对象
  Fn, Ft: string; //文件名
  I: Integer;
begin
  if ListBox1.Items.Count = 0 then
    begin
      Beep;
      Exit;
    end;
  if SaveDialog1.Execute then
    begin
      Fn := SaveDialog1.FileName;
      try
        Af := TFileStream.Create(Fn, fmCreate);
        for I := 0 to ListBox1.Items.Count - 1 do
          begin
            Ft := ListBox1.Items[I];
            Bf := TFileStream.Create(Ft, fmOpenRead);
            Af.CopyFrom(Bf, Bf.Size);
            Bf.Free;
          end;
      finally
        Af.Free;
      end;
    end;
end;

end.