[C#]소켓으로 이미지 전송하기 Thread로 여러장 보내기 merong-답글소스

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace SendImage
{
    public partial class Form1 : Form
    {
        Socket sListener = null;
        List<Socket> clientList = new List<Socket>();
        Thread thread = null;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog dia = new OpenFileDialog();
            dia.Multiselect = false;
            dia.Filter = "jpg files|*.jpg";
 
            if (dia.ShowDialog() == DialogResult.OK)
            {
                this.pictureBox1.ImageLocation = dia.FileName;
 
                if (pictureBox1.InvokeRequired)
                {
                    pictureBox1.BeginInvoke(new Action(() => this.pictureBox1.ImageLocation = dia.FileName));
                }
                else
                {                 
                    this.pictureBox1.ImageLocation = dia.FileName;
                }
 
                foreach (var item in clientList)
                {
                    Byte[] _data = ImageToByteArray(this.pictureBox1.Image);
                    item.Send(BitConverter.GetBytes(_data.Length));
                    item.Send(_data);
                }
 
            }
        }
 
        /// <summary>
        /// 이미지를 바이트로
        /// https://www.codeproject.com/Articles/15460/C-Image-to-Byte-Array-and-Byte-Array-to-Image-Conv
        /// </summary>
        /// <param name="image"></param>
        /// <returns></returns>
        public byte[] ImageToByteArray(System.Drawing.Image image)
        {
            MemoryStream ms = new MemoryStream();
            image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
            return ms.ToArray();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            sListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Any, 8081);
 
            sListener.Bind(ipEndPoint);
            sListener.Listen(20);
 
            thread = new Thread(() => {
                while (true)
                {
                    Socket sClient = sListener.Accept();
                    IPEndPoint ip = (IPEndPoint)sClient.RemoteEndPoint;
                    Console.WriteLine("주소 {0}에서 접속", ip.Address);
 
                    clientList.Add(sClient);
                }
            });
 
            thread.Start();
        }
 
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            sListener.Close();
        }
    }
}
 

클라이언트

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace SendImage2
{
    public partial class Form1 : Form
    {
        Socket sClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);        
        List<Socket> clientList = new List<Socket>();
        Thread thread = null;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8081);
            sClient.Connect(ipEndPoint);
 
            thread = new Thread(() => {
                while (true)
                {
                    Byte[] _data = new byte[256];
                    sClient.Receive(_data);
                    int iLength = BitConverter.ToInt32(_data, 0);
 
                    Byte[] _data2 = new byte[iLength];
                    sClient.Receive(_data2);
 
                    if (pictureBox1.InvokeRequired)
                    {
                        pictureBox1.BeginInvoke(new Action(() => pictureBox1.Image = byteArrayToImage(_data2)));
                    }
                    else
                    {
                        pictureBox1.Image = byteArrayToImage(_data2);
                    }
                }
            });
 
            thread.Start();
        }
 
        /// <summary>
        /// 바이트를 image로
        /// https://www.codeproject.com/Articles/15460/C-Image-to-Byte-Array-and-Byte-Array-to-Image-Conv
        /// </summary>
        /// <param name="byteArrayIn"></param>
        /// <returns></returns>
        public Image byteArrayToImage(byte[] byteArrayIn)
        {
            MemoryStream ms = new MemoryStream(byteArrayIn);
            Image returnImage = Image.FromStream(ms);
            return returnImage;
        }
 
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if(sClient != null) sClient.Close();
        }
    }
}
 

저도 소켓을 잘쓰는 편이 아니라 100프로 정답이라고 하긴 그렇치만 대충 이런식으로 전송하면 될꺼 같아서 

소스 남겨드립니다.

클라이언트로 접속 후에 서버에서 파일하나씩 선택해보세요.

 

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