C# 读取和设置文件、文件夹权限

? ? ? ? C#程序运行时经常遇到文件或文件夹权限问题，导致程序运行失败。为了解决这个头疼的问题，我们通常要读取和设置文件、文件夹权限。

读取文件、文件夹权限

        /// <summary>
        /// 读取文件、文件夹权限
        /// </summary>
        /// <param name="path"></param>
        private void ReadPathRule(string path)
        {
            DirectoryInfo di = new DirectoryInfo(path);
            DirectorySecurity ds = di.GetAccessControl(AccessControlSections.All);
            foreach (FileSystemAccessRule rule in ds.GetAccessRules(true, true, typeof(System.Security.Principal.NTAccount)))
            {
                Console.WriteLine("----------------------------------");
                Console.WriteLine(rule.IdentityReference.Value);
                if ((rule.FileSystemRights & FileSystemRights.Read) != 0)
                    Console.WriteLine(rule.FileSystemRights.ToString());
            }
        }

设置文件权限

        /// <summary>
        /// 为文件添加users，everyone用户组的完全控制权限
        /// </summary>
        /// <param name="filePath"></param>
        static void AddSecurityControll2File(string filePath)
        {

            //获取文件信息
            FileInfo fileInfo = new FileInfo(filePath);
            //获得该文件的访问权限
            System.Security.AccessControl.FileSecurity fileSecurity = fileInfo.GetAccessControl();
            //添加ereryone用户组的访问权限规则 完全控制权限
            fileSecurity.AddAccessRule(new FileSystemAccessRule("Everyone", FileSystemRights.FullControl, AccessControlType.Allow));
            //添加Users用户组的访问权限规则 完全控制权限
            fileSecurity.AddAccessRule(new FileSystemAccessRule("Users", FileSystemRights.FullControl, AccessControlType.Allow));
            //设置访问权限
            fileInfo.SetAccessControl(fileSecurity);
        }

设置文件夹权限

        /// <summary>
        ///为文件夹添加users，everyone用户组的完全控制权限
        /// </summary>
        /// <param name="dirPath"></param>
        static void AddSecurityControll2Folder(string dirPath)
        {
            //获取文件夹信息
            DirectoryInfo dir = new DirectoryInfo(dirPath);
            //获得该文件夹的所有访问权限
            System.Security.AccessControl.DirectorySecurity dirSecurity = dir.GetAccessControl(AccessControlSections.All);
            //设定文件ACL继承
            InheritanceFlags inherits = InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit;
            //添加ereryone用户组的访问权限规则 完全控制权限
            FileSystemAccessRule everyoneFileSystemAccessRule = new FileSystemAccessRule("Everyone", FileSystemRights.FullControl, inherits, PropagationFlags.None, AccessControlType.Allow);
            //添加Users用户组的访问权限规则 完全控制权限
            FileSystemAccessRule usersFileSystemAccessRule = new FileSystemAccessRule("Users", FileSystemRights.FullControl, inherits, PropagationFlags.None, AccessControlType.Allow);
            bool isModified = false;
            dirSecurity.ModifyAccessRule(AccessControlModification.Add, everyoneFileSystemAccessRule, out isModified);
            dirSecurity.ModifyAccessRule(AccessControlModification.Add, usersFileSystemAccessRule, out isModified);
            //设置访问权限
            dir.SetAccessControl(dirSecurity);
        }

参考：

C#中修改文件或文件夹的权限，为指定用户、用户组添加完全控制权限_c#修改文件权限-CSDN博客