Excel导入时 判断是否被占用

Excel导入时 判断是否被占用，三种方法：

1：Win7可以,WIN10不可以

   try
                {
                    //原理，如果文件可以被移动，说明未被占用
                    string strPath = "C:\\123OK.Excel";
                    string strPath2 = "C:\\123OK22.Excel";
                    File.Move(strPath, strPath2);
                    File.Move(strPath2, strPath);
                }
                catch
                {
                    MessageBox.Show("文件被占用！");
                    return;
                }

2：文件流

   try
                {
                    //原理，如果文件可写，说明未被占用
                    System.IO.FileStream stream = System.IO.File.OpenWrite("文件路径");
                    stream.Close();
                }
                catch
                {
                    MessageBox.Show("文件被占用！");
                    return;
                }

3：WIN32 API调用（强烈推荐）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.IO;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        [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 readonly IntPtr HFILE_ERROR = new IntPtr(-1);

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                string vFileName = @"c:\123.xlsx";
                if (!File.Exists(vFileName))
                {
                    MessageBox.Show("文件都不存在!");
                    return;
                }
                IntPtr vHandle = _lopen(vFileName, OF_READWRITE | OF_SHARE_DENY_NONE);
                if (vHandle == HFILE_ERROR)
                {
                    MessageBox.Show("文件被占用！");
                    return;
                }
                CloseHandle(vHandle);
                MessageBox.Show("没有被占用！");
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }
}