socket通信 在运行程序时,出现List index out of bound(0)是什么意思 该如何解决! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 你用得socket套结字没有绑定(没有调用它的绑定函数)或者绑定失败 type client_record=record CHandle: integer; //客户端套接字句柄 CSocket:TCustomWinSocket; //客户端套接字 CName:string; //客户端计算机名称 CAddress:string; //客户端计算机IP地址 CUsed: boolean; //客户端联机标志 end; ....session: array[0..CMax] of client_record; //客户端连接数组 在clientconnect事件中... session[j].CSocket := Socket; ...session[j].CSocket := Socket; 是这里出错吗? 好像不是数组溢出吧,我现在点击连接按钮就会出错,List index out of bound(0)按钮代码:procedure TForm1.Button1Click(Sender: TObject);begin ServerSocket1.Open;end; 我定义的Cmax const Cmax=10 unit uServerMain; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, ScktComp, ToolWin, ComCtrls, ExtCtrls, StdCtrls, Buttons; const CMax=10; //客户端最大连接数 type client_record=record CHandle: integer; //客户端套接字句柄 CSocket:TCustomWinSocket; //客户端套接字 CName:string; //客户端计算机名称 CAddress:string; //客户端计算机IP地址 CUsed: boolean; //客户端联机标志 end; type TfrmServerMain = class(TForm) ServerSocket: TServerSocket; ControlBar1: TControlBar; ToolBar1: TToolBar; tbConnect: TToolButton; tbClose: TToolButton; tbDisconnected: TToolButton; Edit1: TEdit; Memo1: TMemo; StatusBar: TStatusBar; procedure tbConnectClick(Sender: TObject); procedure tbDisconnectedClick(Sender: TObject); procedure ServerSocketClientRead(Sender: TObject; Socket: TCustomWinSocket); procedure ServerSocketListen(Sender: TObject; Socket: TCustomWinSocket); procedure ServerSocketClientConnect(Sender: TObject; Socket: TCustomWinSocket); procedure ServerSocketClientDisconnect(Sender: TObject; Socket: TCustomWinSocket); procedure tbCloseClick(Sender: TObject); procedure FormCreate(Sender: TObject); procedure FormClose(Sender: TObject; var Action: TCloseAction); procedure ServerSocketGetSocket(Sender: TObject; Socket: Integer; var ClientSocket: TServerClientWinSocket); procedure ServerSocketClientError(Sender: TObject; Socket: TCustomWinSocket; ErrorEvent: TErrorEvent; var ErrorCode: Integer); private { Private declarations } public { Public declarations } session: array[0..CMax] of client_record; //客户端连接数组 Sessions: integer; //客户端连接数 end; var frmServerMain: TfrmServerMain; implementation {$R *.DFM} //打开套接字连接,并使套接字进入监听状态 procedure TfrmServerMain.tbConnectClick(Sender: TObject); begin ServerSocket.Open ; end; //关闭套接字连接,不再监听客户端的请求 procedure TfrmServerMain.tbDisconnectedClick(Sender: TObject); begin ServerSocket.Close; StatusBar.Panels[0].Text :='服务器套接字连接已经关闭,无法接受客户端的连接请求.'; end; //从客户端读取信息 procedure TfrmServerMain.ServerSocketClientRead(Sender: TObject; Socket: TCustomWinSocket); var i:integer; begin //将从客户端读取的信息添加到Memo1中 Memo1.Lines.Add(Socket.ReceiveText); for i:=0 to sessions do begin //取得匹配的客户端 if session[i].CHandle = Socket.SocketHandle then begin session[i].CSocket.SendText('回复客户端'+session[i].CAddress+' ==> '+Edit1.Text); end; end; end; //服务器端套接字进入监听状态,以便监听客户端的连接 procedure TfrmServerMain.ServerSocketListen(Sender: TObject; Socket: TCustomWinSocket); begin StatusBar.Panels[0].Text :='等待客户端连接...'; end; //当客户端连接到服务器端以后 procedure TfrmServerMain.ServerSocketClientConnect(Sender: TObject; Socket: TCustomWinSocket); var i,j:integer; begin j:=-1; for i:=0 to sessions do begin //在原有的客户端连接数组中有中断的客户端连接 if not session[i].CUsed then begin session[i].CHandle := Socket.SocketHandle ;//客户端套接字句柄 session[i].CSocket := Socket; //客户端套接字 session[i].CName := Socket.RemoteHost ; //客户端计算机名称 session[i].CAddress := Socket.RemoteAddress ;//客户端计算机IP session[i].CUsed := True; //连接数组当前位置已经占用 Break; end; j:=i; end; if j=sessions then begin inc(sessions); session[j].CHandle := Socket.SocketHandle ; session[j].CSocket := Socket; session[j].CName := Socket.RemoteHost ; session[j].CAddress := Socket.RemoteAddress ; session[j].CUsed := True; end; StatusBar.Panels[0].Text := '客户端 '+Socket.RemoteHost + ' 已经连接'; end; //当客户端断开连接时 procedure TfrmServerMain.ServerSocketClientDisconnect(Sender: TObject; Socket: TCustomWinSocket); var i:integer; begin for i:=0 to sessions do begin if session[i].CHandle =Socket.SocketHandle then begin session[i].CHandle :=0; session[i].CUsed := False; Break; end; end; StatusBar.Panels[0].Text :='客户端 '+Socket.RemoteHost + ' 已经断开'; end; //关闭窗口 procedure TfrmServerMain.tbCloseClick(Sender: TObject); begin Close; end; procedure TfrmServerMain.FormCreate(Sender: TObject); begin sessions := 0; end; procedure TfrmServerMain.FormClose(Sender: TObject; var Action: TCloseAction); begin ServerSocket.Close ; end; //当客户端正在与服务器端连接时 procedure TfrmServerMain.ServerSocketGetSocket(Sender: TObject; Socket: Integer; var ClientSocket: TServerClientWinSocket); begin StatusBar.Panels[0].Text :='客户端正在连接...'; end; //客户端发生错误 procedure TfrmServerMain.ServerSocketClientError(Sender: TObject; Socket: TCustomWinSocket; ErrorEvent: TErrorEvent; var ErrorCode: Integer); begin StatusBar.Panels[0].Text :='客户端'+Socket.RemoteHost +'发生错误!'; ErrorCode := 0; end; end. 问题是程序能运行,但点击connect按钮就会出错。List index out of bound(0) 是不是应该 for i:=0 to sessions-1 do而不是for i:=0 to sessions do 有关XPMenu的问题 菜鸟提问:关于窗口启动顺序问题 大虾,救命呀!!怎么把本机上的所有数据库名及其下的各表名显示到treeview中,有代码50分以上 有谁解决老弟的查询问题呀????? 我想在listbox选中一个条目后,在edit中显视该条目,如何实现? 这是什么文件呢?我怎么看不来什么意思? 哪位仁兄有软件验收报告,送我一个模板,不胜感激!!!!! ◎——招聘——◎ up,gz有分! 我用ADO连接sql server2000数据库,连接如下 100分求教,如何对文本文件进行加密?谢谢。 请问怎么传输结构体? 如何获得域名转向后的地址??????????????
client_record=record
CHandle: integer; //客户端套接字句柄
CSocket:TCustomWinSocket; //客户端套接字
CName:string; //客户端计算机名称
CAddress:string; //客户端计算机IP地址
CUsed: boolean; //客户端联机标志
end; ....
session: array[0..CMax] of client_record; //客户端连接数组 在clientconnect事件中
...
session[j].CSocket := Socket;
...session[j].CSocket := Socket; 是这里出错吗?
按钮代码:
procedure TForm1.Button1Click(Sender: TObject);
begin
ServerSocket1.Open;
end;
const
Cmax=10
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ScktComp, ToolWin, ComCtrls, ExtCtrls, StdCtrls, Buttons;
const
CMax=10; //客户端最大连接数
type
client_record=record
CHandle: integer; //客户端套接字句柄
CSocket:TCustomWinSocket; //客户端套接字
CName:string; //客户端计算机名称
CAddress:string; //客户端计算机IP地址
CUsed: boolean; //客户端联机标志
end;
type
TfrmServerMain = class(TForm)
ServerSocket: TServerSocket;
ControlBar1: TControlBar;
ToolBar1: TToolBar;
tbConnect: TToolButton;
tbClose: TToolButton;
tbDisconnected: TToolButton;
Edit1: TEdit;
Memo1: TMemo;
StatusBar: TStatusBar;
procedure tbConnectClick(Sender: TObject);
procedure tbDisconnectedClick(Sender: TObject);
procedure ServerSocketClientRead(Sender: TObject;
Socket: TCustomWinSocket);
procedure ServerSocketListen(Sender: TObject;
Socket: TCustomWinSocket);
procedure ServerSocketClientConnect(Sender: TObject;
Socket: TCustomWinSocket);
procedure ServerSocketClientDisconnect(Sender: TObject;
Socket: TCustomWinSocket);
procedure tbCloseClick(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure ServerSocketGetSocket(Sender: TObject; Socket: Integer;
var ClientSocket: TServerClientWinSocket);
procedure ServerSocketClientError(Sender: TObject;
Socket: TCustomWinSocket; ErrorEvent: TErrorEvent;
var ErrorCode: Integer);
private
{ Private declarations }
public
{ Public declarations }
session: array[0..CMax] of client_record; //客户端连接数组
Sessions: integer; //客户端连接数
end;
var
frmServerMain: TfrmServerMain;
implementation
{$R *.DFM}
//打开套接字连接,并使套接字进入监听状态
procedure TfrmServerMain.tbConnectClick(Sender: TObject);
begin
ServerSocket.Open ;
end;
//关闭套接字连接,不再监听客户端的请求
procedure TfrmServerMain.tbDisconnectedClick(Sender: TObject);
begin
ServerSocket.Close;
StatusBar.Panels[0].Text :='服务器套接字连接已经关闭,无法接受客户端的连接请求.';
end;
//从客户端读取信息
procedure TfrmServerMain.ServerSocketClientRead(Sender: TObject;
Socket: TCustomWinSocket);
var
i:integer;
begin
//将从客户端读取的信息添加到Memo1中
Memo1.Lines.Add(Socket.ReceiveText);
for i:=0 to sessions do
begin
//取得匹配的客户端
if session[i].CHandle = Socket.SocketHandle then
begin
session[i].CSocket.SendText('回复客户端'+session[i].CAddress+' ==> '+Edit1.Text);
end;
end;
end;
//服务器端套接字进入监听状态,以便监听客户端的连接
procedure TfrmServerMain.ServerSocketListen(Sender: TObject;
Socket: TCustomWinSocket);
begin
StatusBar.Panels[0].Text :='等待客户端连接...';
end;
//当客户端连接到服务器端以后
procedure TfrmServerMain.ServerSocketClientConnect(Sender: TObject;
Socket: TCustomWinSocket);
var
i,j:integer;
begin
j:=-1;
for i:=0 to sessions do
begin
//在原有的客户端连接数组中有中断的客户端连接
if not session[i].CUsed then
begin
session[i].CHandle := Socket.SocketHandle ;//客户端套接字句柄
session[i].CSocket := Socket; //客户端套接字
session[i].CName := Socket.RemoteHost ; //客户端计算机名称
session[i].CAddress := Socket.RemoteAddress ;//客户端计算机IP
session[i].CUsed := True; //连接数组当前位置已经占用
Break;
end;
j:=i;
end;
if j=sessions then
begin
inc(sessions);
session[j].CHandle := Socket.SocketHandle ;
session[j].CSocket := Socket;
session[j].CName := Socket.RemoteHost ;
session[j].CAddress := Socket.RemoteAddress ;
session[j].CUsed := True;
end;
StatusBar.Panels[0].Text := '客户端 '+Socket.RemoteHost + ' 已经连接';
end;
//当客户端断开连接时
procedure TfrmServerMain.ServerSocketClientDisconnect(Sender: TObject;
Socket: TCustomWinSocket);
var
i:integer;
begin
for i:=0 to sessions do
begin
if session[i].CHandle =Socket.SocketHandle then
begin
session[i].CHandle :=0;
session[i].CUsed := False;
Break;
end;
end;
StatusBar.Panels[0].Text :='客户端 '+Socket.RemoteHost + ' 已经断开';
end;
//关闭窗口
procedure TfrmServerMain.tbCloseClick(Sender: TObject);
begin
Close;
end;
procedure TfrmServerMain.FormCreate(Sender: TObject);
begin
sessions := 0;
end;
procedure TfrmServerMain.FormClose(Sender: TObject;
var Action: TCloseAction);
begin
ServerSocket.Close ;
end;
//当客户端正在与服务器端连接时
procedure TfrmServerMain.ServerSocketGetSocket(Sender: TObject;
Socket: Integer; var ClientSocket: TServerClientWinSocket);
begin
StatusBar.Panels[0].Text :='客户端正在连接...';
end;
//客户端发生错误
procedure TfrmServerMain.ServerSocketClientError(Sender: TObject;
Socket: TCustomWinSocket; ErrorEvent: TErrorEvent;
var ErrorCode: Integer);
begin
StatusBar.Panels[0].Text :='客户端'+Socket.RemoteHost +'发生错误!';
ErrorCode := 0;
end;
end.
问题是程序能运行,但点击connect按钮就会出错。List index out of bound(0)
for i:=0 to sessions-1 do
而不是
for i:=0 to sessions do