Windows句柄、进程和被占用文件路径之间的操作

1、由进程判断指定文件夹及文件是否被占用

using System;
using System.Diagnostics;

namespace Windows
{
    public class EnumWindowsApp
    {
        public void EnumWindowsApps()
        {
            string targetPath = Environment.CurrentDirectory;
            Process[] processes = Process.GetProcesses();
            for (int i = 0; i < processes.GetLength(0); i++)
            {
                try
                {
                    Process process = Process.GetCurrentProcess();

                    #region 通过目标路径判断目标路径是否有程序启动
                    string processFilePath = processes[i].MainModule.FileName;
                    processFilePath = processFilePath.Substring(0, processFilePath.IndexOf(processFilePath.Split('\\')[processFilePath.Split('\\').GetLength(0) - 1]));
                    //如果当前路径存在 在系统进程中
                    if (targetPath.Equals(processFilePath))
                    {
                        //通过反射取得当前进程中的非公共成员
                        System.Reflection.FieldInfo fieldInfo = processes[i].GetType().GetField("processInfo", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
                        dynamic processInfo = fieldInfo.GetValue(processes[i]);
                        //取得进程id
                        int processId = processInfo.processId;

                        //目标目录内的文件被当前进程所占用  如有需求 可杀掉进程
                        //processes[i].Kill();
                    }
                    #endregion
                }
                catch (Exception)
                {
                }
            }
        }
    }
}

2、由句柄判断指定文件夹及文件是否被占用

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
public delegate bool CallBack(int hwnd, int lParam);

namespace Windows
{
    public class EnumWindowsApp
    {
        [DllImport("user32")]
        public static extern int EnumWindows(CallBack x, int y);
        public static void Main()
        {
            CallBack myCallBack = new CallBack(EnumWindowsApp.Excute);
            EnumWindows(myCallBack, 0);
        }

        /// <summary>
        /// 开始逐个遍历 Windows 句柄 并取得句柄的进程和路径
        /// </summary>
        public static bool Excute(int hwnd, int lParam)
        {
            //获得当前句柄对应的程序进程
            Process process = GetProcessPath(new IntPtr(hwnd));
            //获取当前句柄对应进程的文件路径
            string appPath = process?.MainModule.FileName;
            return true;
        }


        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern int GetWindowThreadProcessId(IntPtr handle, out uint processId);

        public static Process GetProcessPath(IntPtr hwnd)
        {
            Process process = null;
            try
            {
                uint pid = 0;
                GetWindowThreadProcessId(hwnd, out pid);
                //由进程ID得到进程
                process = Process.GetProcessById((int)pid);
                //此处会失败，会报出 程序以32位平台运行时取64位程序的进程路径会异常 故用try catch块儿包起来
                _ = process.MainModule.FileName;
            }
            catch (Exception)
            {

            }
            return process;
        }
    }

}