close
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;

using YD.ZYCAlarm.Buffer;

namespace YD.ZYCAlarm.UDPCommunicate
{
    
/// <summary>
    
/// SendCommand 的摘要說明。
    
/// </summary>

    public class SendCommand
    
{
        
/// <summary>
        
/// 要發送的命令文本
        
/// </summary>

        private string m_CmdText;

        
/// <summary>
        
/// 
        
/// </summary>

        private static readonly int BUF_SIZE=0x10000;

        
/// <summary>
        
/// 本地UDP對像
        
/// </summary>

        private Socket m_Client ;

        
/// <summary>
        
/// 本地端口(也可以不設)
        
/// </summary>

        private int m_LocalPort;

        
/// <summary>
        
/// 遠程端口
        
/// </summary>

        private int m_RemotePort ;

        
/// <summary>
        
/// 遠程IP
        
/// </summary>

        private string m_RemoteIP ;

        
/// <summary>
        
/// 對方網絡節點
        
/// </summary>

        private IPEndPoint m_RemoteEP ;

        
public SendCommand( string strIP,int iPort,string strCmd )
        
{
            
this.m_RemoteIP = strIP ;
            
this.m_RemotePort = iPort;
            
this.m_CmdText  = strCmd;

            m_RemoteEP 
= new IPEndPoint(IPAddress.Parse( m_RemoteIP ) , m_RemotePort) ; 
        }


        
private void  ConnectToServer()
        
{
            m_Client
=new Socket(AddressFamily.InterNetwork,
                SocketType.Dgram,
                ProtocolType.Udp
                );

            m_Client.SetSocketOption(SocketOptionLevel.Socket,
                SocketOptionName.ReceiveTimeout, 
                
3000
                );
        }


        
public bool Send()
        
{
            ConnectToServer();
            
            
try
            
{
                Byte[] sendBytes 
= Encoding.ASCII.GetBytes(this.m_CmdText); 
                
this.m_Client.SendTo(sendBytes ,sendBytes.Length,SocketFlags.None,m_RemoteEP) ; 

                
//接收服務端的回應的成功信息
                return Receive();
            }

            
catch
            
{
                
return false ;
            }

        }


        
private bool Receive()
        
{
            
byte[] buf=new byte[BUF_SIZE];
            EndPoint remoteEndPoint
=new IPEndPoint(IPAddress.Any,0);
            
            
try
            
{
                
int receive = this.m_Client.ReceiveFrom(buf,ref remoteEndPoint) ;
                
string strData= Encoding.ASCII.GetString(buf,0,receive); 

                
if(strData == "OK")
                
{
                    
return true ;
                }

                
else
                
{
                    
return false ;
                }

                
            }

            
catch
            
{
                
return false ;
            }

            
finally
            
{
                
this.m_Client.Close();
                
this.m_Client = null ;
            }

        }
 

        
public void  Dispose()  
        
{
            
if(this.m_Client != null)
            
{
                
this.m_Client.Close();
                
this.m_Client = null;
            }

        }


    }

}


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