winform客户端与服务端之间发送消息和文件，文件可批量上传，客户端需要连接服务端的IP地址即可通信和发文件；具体代码实现过程

以下是使用C#编写的一个简单示例，展示了如何在WinForms客户端和服务端之间发送消息和文件。

首先，创建一个WinForms应用程序，包含两个窗体：`ClientForm`和`ServerForm`。

在`ClientForm`中，添加以下控件：一个`TextBox`用于输入消息，一个`Button`用于发送消息，一个`Button`用于选择文件，一个`Button`用于批量上传文件。

using System;
using System.IO;
using System.Net.Sockets;
using System.Windows.Forms;

namespace Client
{
    public partial class ClientForm : Form
    {
        private TcpClient client;

        public ClientForm()
        {
            InitializeComponent();
        }

        private void ConnectToServer(string serverIP)
        {
            try
            {
                client = new TcpClient();
                client.Connect(serverIP, 8888);
                MessageBox.Show("Connected to the server!");
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error connecting to the server: " + ex.Message);
            }
        }

        private void SendMessage(string message)
        {
            try
            {
                StreamWriter writer = new StreamWriter(client.GetStream());
                writer.WriteLine(message);
                writer.Flush();
                MessageBox.Show("Message sent!");
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error sending message: " + ex.Message);
            }
        }

        private void SendFile(string filePath)
        {
            try
            {
                FileStream fileStream = new FileStream(filePath, FileMode.Open);
                byte[] buffer = new byte[client.ReceiveBufferSize];
                int bytesRead;
                NetworkStream networkStream = client.GetStream();
                while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) > 0)
                {
                    networkStream.Write(buffer, 0, bytesRead);
                }
                fileStream.Close();
                MessageBox.Show("File sent!");
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error sending file: " + ex.Message);
            }
        }

        private void btnConnect_Click(object sender, EventArgs e)
        {
            string serverIP = txtServerIP.Text;
            ConnectToServer(serverIP);
        }

        private void btnSend_Click(object sender, EventArgs e)
        {
            string message = txtMessage.Text;
            SendMessage(message);
        }

        private void btnSelectFile_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                txtFilePath.Text = openFileDialog.FileName;
            }
        }

        private void btnSendFile_Click(object sender, EventArgs e)
        {
            string filePath = txtFilePath.Text;
            SendFile(filePath);
        }
    }
}

在`ServerForm`中，添加以下控件：一个`TextBox`用于显示接收到的消息，一个`Button`用于启动服务器。

using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Windows.Forms;

namespace Server
{
    public partial class ServerForm : Form
    {
        private TcpListener server;
        private Thread listenThread;

        public ServerForm()
        {
            InitializeComponent();
        }

        private void StartServer()
        {
            try
            {
                server = new TcpListener(IPAddress.Any, 8888);
                server.Start();
                MessageBox.Show("Server started!");

                while (true)
                {
                    TcpClient client = server.AcceptTcpClient();
                    Thread clientThread = new Thread(HandleClient);
                    clientThread.Start(client);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error starting the server: " + ex.Message);
            }
        }

        private void HandleClient(object clientObj)
        {
            TcpClient client = (TcpClient)clientObj;
            try
            {
                StreamReader reader = new StreamReader(client.GetStream());
                string message = reader.ReadLine();
                Invoke((MethodInvoker)delegate
                {
                    txtReceivedMessage.Text = message;
                });
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error handling client: " + ex.Message);
            }
            finally
            {
                client.Close();
            }
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            listenThread = new Thread(StartServer);
            listenThread.Start();
        }
    }
}

以上是一个简单的示例，演示了如何在WinForms客户端和服务端之间发送消息和文件。当客户端连接到服务端时，客户端可以输入消息并发送，也可以选择文件并发送。服务端接收到消息后，在界面上显示接收到的消息。

请注意，这只是一个基本示例，可能需要根据您的实际需求进行修改和扩展。例如，您可能需要添加错误处理、进度条、文件上传进度等功能。

希望以上代码能对您有所帮助！如果您有其他问题，请随时提问。