C# WinForm 检测文件是否被占用

最新推荐文章于 2025-01-17 10:04:45 发布

老瓷

最新推荐文章于 2025-01-17 10:04:45 发布

阅读量659

点赞数

分类专栏： C#

本文链接：https://blog.youkuaiyun.com/doubworm/article/details/106110043

版权

#region 检测文件状态及操作方式选择
[DllImport("kernel32.dll")]
private static extern IntPtr _lopen(string lpPathName, int iReadWrite);
[DllImport("kernel32.dll")]
private static extern bool CloseHandle(IntPtr hObject);
private const int OF_READWRITE = 2;
private const int OF_SHARE_DENY_NONE = 0x40;
private static readonly IntPtr HFILE_ERROR = new IntPtr(-1);
/// <summary>
/// 检测文件是否只读或被使用
/// </summary>
/// <param name="FileNames">要检测的文件</param>
/// <returns>true可用，false在用或只读</returns>
public static bool CheckFilesState(string fileName)
{
    if (!File.Exists(fileName))
        return true;//文件不存在
    if ((File.GetAttributes(fileName) & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
        return false;       //文件只读
    IntPtr vHandle = _lopen(fileName, OF_READWRITE | OF_SHARE_DENY_NONE);
    if (vHandle == HFILE_ERROR)
        return false;       //文件被占用