unit1.cpp

<<C++Builder 6实用编程100例>>随书光盘

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::CheckBox1Click(TObject *Sender)
{
        if(CheckBox1->Checked)
        {
                Edit3->Enabled=true;
                Edit3->SetFocus();
        }
        else
                Edit3->Enabled=false;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
        try
        {  
                NMEcho1->ClearInput();
                NMEcho1->Host=Edit1->Text;
                NMEcho1->TimeOut=StrToInt(Edit2->Text);
                if(CheckBox1->Checked)
                        NMEcho1->Port=StrToInt(Edit3->Text);
                else
                        NMEcho1->Port=7;
                NMEcho1->ReportLevel=Status_Basic;
                NMEcho1->Connect();
                Button1->Enabled=false;
                Button2->Enabled=true;
        }
        catch(...)
        {
                StatusBar1->Panels->Items[0]->Text="Echo failed.";
        }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
        NMEcho1->Disconnect();
        Button1->Enabled=true;
        Button2->Enabled=false;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::NMEcho1Connect(TObject *Sender)
{
        StatusBar1->Panels->Items[0]->Text="Connect succeed.";
        Memo1->Lines->Add("Echo has connected host.");
        Memo1->Lines->Add("Local Address: "+NMEcho1->LocalIP);
        Memo1->Lines->Add("Remote Address: "+NMEcho1->RemoteIP);
        Memo1->Lines->Add("");
        Memo1->Lines->Add("Connection echo Test.");
        Memo1->Lines->Add(NMEcho1->Echo(Edit4->Text));
        Memo1->Lines->Add("ElapsedTime:"+FloatToStr(NMEcho1->ElapsedTime)+"ms");
        Memo1->Lines->Add("");
}
//---------------------------------------------------------------------------
void __fastcall TForm1::NMEcho1ConnectFailed(TObject *Sender)
{
        ShowMessage("Connect failed.");
        NMEcho1->Disconnect();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::NMEcho1Disconnect(TObject *Sender)
{
        StatusBar1->Panels->Items[0]->Text="Echo has disconnected.";
}
//---------------------------------------------------------------------------
void __fastcall TForm1::NMEcho1Resolved(TComponent *Sender)
{
        Memo1->Lines->Add("Host domain name has been reserved.");
}
//---------------------------------------------------------------------------
void __fastcall TForm1::NMEcho1InvalidHost(bool &Handled)
{
        String hostname;
        if(InputQuery("Invalid host!","A new host:",hostname))
        {
                Edit1->Text=hostname;
                NMEcho1->Host=hostname;
                Handled=true;
        }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::NMEcho1Status(TComponent *Sender,
      AnsiString Status)
{
        Memo1->Lines->Add(NMEcho1->Status);
                Memo1->Lines->Add("Last WinSock error: "+IntToStr(NMEcho1->LastErrorNo));
        if(NMEcho1->BeenCanceled)
                Memo1->Lines->Add("Input/ouput operation canceled");
        if(NMEcho1->BeenTimedOut)
                Memo1->Lines->Add("Operation timed out");
}
//---------------------------------------------------------------------------