CaiQie/RfidWeb/Program.cs

using System;
using System.Diagnostics;
using System.Windows.Forms;

namespace RfidWeb
{
    internal static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            // 获取当前运行的进程名
            string currentProcessName = Process.GetCurrentProcess().ProcessName;

            // 检查是否存在其他同名进程
            var processes = Process.GetProcessesByName(currentProcessName);
            if (processes.Length > 1)
            {
                // 如果有多个同名进程，说明已经有实例在运行
                MessageBox.Show("应用程序已在运行！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }


            AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
            AppContext.SetSwitch("Npgsql.DisableDateTimeInfinityConversions", true);
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new  FormMain());

            //Application.Run(new FromSQl());
        }
    }
}