ClientSocket的Data属性是干什么用的?誰有用ServerSocket与ClientSocket传送文件的例子?(100分)

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ClientSocket的Data属性是干什么用的?
誰有用ServerSocket与ClientSocket传送文件的例子代码?
 
//这个程序不是我的,不会侵权吧

unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ScktComp, StdCtrls;
type
TCon = record
FileName : String;
TotalSize : Integer;
Status : Integer;
end;

PCON = ^TCON;

TForm1 = class(TForm)
SS: TServerSocket;
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure SSClientConnect(Sender: TObject; Socket: TCustomWinSocket);
procedure SSClientRead(Sender: TObject; Socket: TCustomWinSocket);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
uses Unit2;

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
SS.Port := 9000;
SS.Active := True;
end;

procedure TForm1.SSClientConnect(Sender: TObject;
Socket: TCustomWinSocket);
var c : pcon;
begin

c :=new(pcon);
c.FileName := '';
c.TotalSize := 0 ;
c.Status := 0;
Socket.Data := c;
Socket.SendText('已经连接,请输入UPLOAD FILENAME SIZE'#13#10);

end;

procedure TForm1.SSClientRead(Sender: TObject; Socket: TCustomWinSocket);
var C : PCON;
cmd:String;
Buffer : pointer;
nRetr : integer;
fs : TFileStream;
const bufferSize = 1024 ;

begin
C:= Socket.Data ;
case c.Status of
0 :
begin
cmd := trim(Socket.ReceiveText) ;

if Pos('UPLOAD ',uppercase(cmd)) > 0 then
begin
c.FileName := trim(Copy(cmd,Pos(' ',cmd)+1,Length(cmd)));
c.TotalSize := StrToInt(Copy(c.FileName,Pos(' ',c.FileName)+1,Length(c.FileName)));
c.FileName := trim(Copy(c.FileName,1,Pos(' ',c.FileName)));
c.Status := 1;
Socket.Data := C;
Socket.SendText('you can send File !'#13#10);
end;
end;
1 : begin
GetMem(Buffer,BufferSize);
nRetr := Socket.ReceiveBuf(Buffer^,BufferSize);

if not FIleExists('c:/'+c.FileName) then
begin
fs :=TFileStream.Create('c:/'+c.FileName,fmCreate or fmShareDenyNone);
fs.Seek(0,soFromBeginning);
end
else
begin
fs :=TFileStream.Create('c:/'+c.FileName,fmOpenWrite or fmShareDenyNone);
fs.Seek(0,soFromEnd);
end;

fs.WriteBuffer(Buffer^,nRetr);

fs.Destroy;
FreeMem(Buffer);
end;
end;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
Form2.Show;
end;

end.




--------------------------------------------------------------------------------
unit Unit2;

interface

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

type
TForm2 = class(TForm)
CS: TClientSocket;
OpenDialog1: TOpenDialog;
Memo1: TMemo;
Button1: TButton;
Edit1: TEdit;
Button2: TButton;
SendCommand: TButton;
Label1: TLabel;
Button3: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure SendCommandClick(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure CSRead(Sender: TObject; Socket: TCustomWinSocket);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form2: TForm2;

implementation

{$R *.DFM}
function GetFileSize(const FileName: string):integer;
var f : TFileStream;
begin
f := TFileStream.Create(FileName,fmOpenRead or fmShareDenyNone);
Result :=f.Size;
F.Free;
end;
procedure TForm2.Button1Click(Sender: TObject);
begin
with OpenDialog1 do
begin
Execute;
if FileName <> '' then
begin
Edit1.Text := 'UPLOAD '+ ExtractFileName(FileName) +' '+Inttostr(GetFileSize(FileName));
Label1.Caption := FileName;
cs.Socket.SendText(edit1.Text);
end;
end;
end;

procedure TForm2.Button2Click(Sender: TObject);
begin
CS.Active := True;

end;

procedure TForm2.SendCommandClick(Sender: TObject);
var fs : TFileStream;
Buf : pointer;

begin
//CS.Socket.SendText(Edit1.Text+#13#10);
//Memo1.Lines.Add();
fs := TFileStream.Create(Label1.Caption ,fmOpenRead or fmShareDenyNone);

GetMem(Buf,fs.Size);
fs.Seek(0,soFromBeginning);

fs.ReadBuffer(Buf^,fs.Size);

memo1.Lines.Add('has send : '+inttostr(Cs.Socket.SendBuf(Buf^,fs.Size)));

end;

procedure TForm2.Button3Click(Sender: TObject);
begin
cs.Close;
end;

procedure TForm2.CSRead(Sender: TObject; Socket: TCustomWinSocket);
begin

Memo1.Lines.add(socket.receiveText);

end;

end.
 
ClientSocket可能会有很多,data属性用来保存一些你私人的信息
 
ClientSocket的Data属性中保存的是当前的数据包。
 
多人接受答案了。
 
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