unit1.~cpp

PC机和以太网转串口设备通讯例子

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

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;

int g_ConnectState=0;//连接状态
 
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------



void TForm1::SetConnectBtnState()
{
        //TODO: Add your source code here
        switch(g_ConnectState)
        {
        case 0:
                Button1->Caption="连接";
                Button1->Enabled=TRUE;
                break;
        case 1:
                Button1->Caption="断开";
                Button1->Enabled=TRUE;
                break;
        case 2:
                Button1->Enabled=FALSE;
                break;
        }
}
void __fastcall TForm1::Button1Click(TObject *Sender)
{
        if(g_ConnectState==0)
        {
                ClientSocket1->Address=Edit1->Text;
                ClientSocket1->Port=atoi(Edit2->Text.c_str());
                ClientSocket1->Open();
                g_ConnectState=2;
                SetConnectBtnState();
        }
        else
        {
                ClientSocket1->Close();
                g_ConnectState=0;
                SetConnectBtnState();
        }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::OnConnect(TObject *Sender,
      TCustomWinSocket *Socket)
{
        g_ConnectState=1;
        SetConnectBtnState();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::OnDisConnect(TObject *Sender,
      TCustomWinSocket *Socket)
{
        g_ConnectState=0;
        ClientSocket1->Close();
        SetConnectBtnState();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::OnRead(TObject *Sender, TCustomWinSocket *Socket)
{
         Edit4->Text+=ClientSocket1->Socket->ReceiveText();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
        ClientSocket1->Socket->SendText(Edit3->Text);
}
//---------------------------------------------------------------------------

void __fastcall TForm1::OnError(TObject *Sender, TCustomWinSocket *Socket,
      TErrorEvent ErrorEvent, int &ErrorCode)
{
        g_ConnectState=0;
        ClientSocket1->Close();
        SetConnectBtnState();
        ErrorCode=0;
}
//---------------------------------------------------------------------------