C#判断文件打开、占用的状态

using System;

using System.IO;

using System.Runtime.InteropServices;

namespace Bn6.Packing.Common

{

    public class FileStatus

    {

        [DllImport("kernel32.dll")]

        public static extern IntPtr _lopen(string lpPathName, int iReadWrite);

        [DllImport("kernel32.dll")]

        public static extern bool CloseHandle(IntPtr hObject);

        public const int OF_READWRITE = 2;

        public const int OF_SHARE_DENY_NONE = 0x40;

        public static readonly IntPtr HFILE_ERROR = new IntPtr(-1);

        /// <summary>

        /// 获取文件状态(不存在返回-1；被占用返回1；正常返回0)

        /// </summary>

        /// <param name="fileFullName">文件全路径名</param>

        /// <returns></returns>

        public static int GetFileStat(string fileFullName)

        {

            if (!File.Exists(fileFullName))

                return -1;

            IntPtr vHandle = _lopen(fileFullName, OF_READWRITE | OF_SHARE_DENY_NONE);

            if (vHandle == HFILE_ERROR)

                return 1;

            CloseHandle(vHandle);

            return 0;

        }

    }

}