VS_FileSendTool/FS/FileSend/StartPanel.cs

using System.Net;
using Net;

namespace FileSend
{
    public partial class StartPanel : Form
    {
        public StartPanel()
        {
            InitializeComponent();
            NetHelper.Init();
        }

        void Choose()
        {
            button_PullFile.Visible = true;
            button_PushFile.Visible = true;

            button_OpenServer.Visible = false;
            button_ConnectServer.Visible = false;
            textBox_IP.Visible = false;
            textBox_Port.Visible = false;
            label1.Visible = false;
            label2.Visible = false;
        }

        private void button_OpenServer_Click(object sender, EventArgs e)
        {
            if (!Helper.MatchIP(textBox_IP.Text))
            {
                MessageBox.Show(@"IP 不合法！");
                return;
            }

            int port = int.Parse(textBox_Port.Text);
            if (!Helper.MatchPort(port))
            {
                MessageBox.Show(@"Port 不合法！");
                return;
            }

            Choose();
            NetHelper.Port = port;
            NetHelper.IP = textBox_IP.Text;
            Server server = new Server(port);
            NetHelper.Server = server;
            NetHelper.IsServer = true;
        }

        private void button_ConnectServer_Click(object sender, EventArgs e)
        {
            if (!Helper.MatchIP(textBox_IP.Text))
            {
                MessageBox.Show(@"IP 不合法！");
                return;
            }

            int port = int.Parse(textBox_Port.Text);
            if (!Helper.MatchPort(port))
            {
                MessageBox.Show(@"Port 不合法！");
                return;
            }

            NetHelper.Port = port;
            NetHelper.IP = textBox_IP.Text;
            
            Client client = new Client($"{NetHelper.IP}:{NetHelper.Port}");
            NetHelper.Client = client;
            NetHelper.IsServer = false;
            Choose();
        }

        private void button_Setting_Click(object sender, EventArgs e)
        {
            if (setting == null)
            {
                setting = new Setting();
            }

            setting.Show();
            Visible = false;
            setting.FormClosed += Close;
        }

        private void Close(object? sender, FormClosedEventArgs e)
        {
            Visible = true;
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
        }

        private void button_PushFile_Click(object sender, EventArgs e)
        {
            if (pushFile == null)
            {
                pushFile = new PushFilePanel(2);
            }

            pushFile.Show();
            Visible = false;
            pushFile.FormClosed += Close;
        }

        private void button_PullFile_Click(object sender, EventArgs e)
        {
            if (pullFile == null)
            {
                pullFile = new PullFilePanel();
            }

            pullFile.Show();
            Visible = false;
            pullFile.FormClosed += Close;
        }
    }
}