UDP 发送广播

最新推荐文章于 2022-09-06 11:21:50 发布

原创最新推荐文章于 2022-09-06 11:21:50 发布 · 941 阅读

1 ·

CC 4.0 BY-SA版权

文章标签：

#string #object #socket #dataset #timer #byte

asp.net/c# 专栏收录该内容

6 篇文章

订阅专栏

本系统通过服务端查询未发送的温度警报，并将其通过UDP广播到客户端。客户端接收这些警报并显示信息。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

服务端：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OracleClient;
using System.Net.Sockets;
using System.Net;

namespace TempAlert
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }

        private void tempTimer_Tick(object sender, EventArgs e)
        {
            DbUtil du = new DbUtil();
            StringBuilder sql = new StringBuilder();
            sql.Append(" select * from sys_log_absolute where ISSENT = 0");
            DataSet ds = du.GetDataSet(sql.ToString());
            Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

IPEndPoint iep2 = new IPEndPoint(IPAddress.Parse("255.255.255.255"), 9050);

sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);

            if (ds.Tables[0].Rows.Count>0)
            {

                for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                {
                    string bh = ds.Tables[0].Rows[i]["BH"].ToString();
                    string cgqdate = ds.Tables[0].Rows[i]["CGQDATE"].ToString();
                    string createdat = ds.Tables[0].Rows[i]["CREATEDAT"].ToString();
                    string title = ds.Tables[0].Rows[i]["TITLE"].ToString();
                    string limitTemp = ds.Tables[0].Rows[i]["cgqdate1"].ToString();
                    string _data = "设备编号：" + bh + "|" + "当前温度：" + cgqdate + "|" + "受限温度：" + limitTemp + "|" + "超温时间：" + createdat + "|" + "报警类型：" + title;
                    //转换编码成UTF8
                    Encoding vGBK = Encoding.GetEncoding("GBK");
                    if (vGBK!=null)
                    {
                        byte[] vBytes = vGBK.GetBytes(_data);
                        string Text = vBytes.Length.ToString();
                        byte[] vUtf8 = Encoding.Convert(vGBK, Encoding.UTF8, vBytes);
                        Text = Encoding.UTF8.GetString(vUtf8);
                        sock.SendTo(System.Text.Encoding.Default.GetBytes(Text), iep2);
                    }
                    string updateSql = "update sys_log_absolute set issent = 1 where bh ='"+bh+"'";
                    du.ExecuteDataBase(updateSql);
                }
            }
            sock.Close();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            tempTimer.Enabled = true;
            timer_differ.Enabled = true;
            label1.Text = "服务开启";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            tempTimer.Enabled = true;
            timer_differ.Enabled = true;
            label1.Text = "服务开启";
        }

        private void button2_Click(object sender, EventArgs e)
        {
            tempTimer.Enabled = false;
            timer_differ.Enabled = false;
            label1.Text = "服务关闭";
        }

private void label2_Click(object sender, EventArgs e)
{

}

        private void timer_differ_Tick(object sender, EventArgs e)
        {
            DbUtil du = new DbUtil();
            StringBuilder sql = new StringBuilder();

            sql.Append("select * from sys_log_difference where ISSENT = 0");


            DataSet ds = du.GetDataSet(sql.ToString());
            Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

IPEndPoint iep2 = new IPEndPoint(IPAddress.Parse("255.255.255.255"), 9050);

            sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
            if (ds.Tables[0].Rows.Count > 0)
            {

                for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                {
                    string bdzid = ds.Tables[0].Rows[i]["bdzid"].ToString();
                    string name1 = ds.Tables[0].Rows[i]["name1"].ToString();
                    string maxtemp = ds.Tables[0].Rows[i]["maxtemp"].ToString();
                    string createdat = ds.Tables[0].Rows[i]["createdat"].ToString();
                    string title = ds.Tables[0].Rows[i]["TITLE"].ToString();
                    string limitTemp = ds.Tables[0].Rows[i]["limit_temp"].ToString();
                    string _data = "变电站号：" + bdzid + "|" + "当前温度：" + maxtemp + "|" + "受限温度：" + limitTemp + "|" + "超温时间：" + createdat + "|" + "报警类型：" + title;
                    //转换编码成UTF8
                    Encoding vGBK = Encoding.GetEncoding("GBK");
                    if (vGBK != null)
                    {
                        byte[] vBytes = vGBK.GetBytes(_data);
                        string Text = vBytes.Length.ToString();
                        byte[] vUtf8 = Encoding.Convert(vGBK, Encoding.UTF8, vBytes);
                        Text = Encoding.UTF8.GetString(vUtf8);
                        sock.SendTo(System.Text.Encoding.Default.GetBytes(Text), iep2);
                        string updateSql = "update sys_log_difference set issent = 1 where name1 ='" + name1 + "'";
                        du.ExecuteDataBase(updateSql);
                    }
                }
            }
            sock.Close();
        }
    }
}
客户端：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net.Sockets;
using System.Net;
using System.Threading;

namespace TempAlertClient
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        Socket sock = null;
        EndPoint ep = null;
        Thread t = null;

        private void Form1_Load(object sender, EventArgs e)
        {
            sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9050);
            sock.Bind(iep);
            ep = (EndPoint)iep;

            Control.CheckForIllegalCrossThreadCalls = false;
            t = new Thread(new ThreadStart(fff));
            t.IsBackground = true;
            t.Start();

        }
        private void fff() {
            while(true){
                byte[] data = new byte[1024];
                int recv = sock.ReceiveFrom(data, ref ep);
                string stringData = Encoding.ASCII.GetString(data, 0, recv);
                lb_msg.Items.Add(Encoding.Default.GetString(data));
            }

        }

}
}