System.MissingMethodException：无法使用 dirInfo.GetAccessControl()；在c#中

Question

问题：

我正在关注microsoft reference，以便在网络共享上设置目录权限。

尽管 Intellicode 没有显示任何问题，但只要调用包含 dirInfo.GetAccessControl(); 的函数，我就会收到以下错误

System.MissingMethodException: '找不到方法：'System.Security.AccessControl.DirectorySecurity System.IO.DirectoryInfo.GetAccessControl()'。'

要执行的函数如下：

public static void SetFullPermission(string path, string domainAccount)
{
    NTAccount ntaccount = new NTAccount("my_domain", domainAccount);
    var ds = new DirectorySecurity();
    DirectoryInfo dirInfo = new DirectoryInfo(path);
    ds = dirInfo.GetAccessControl();
    ds.AddAccessRule(new FileSystemAccessRule(ntaccount, FileSystemRights.FullControl, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.None, AccessControlType.Allow));
    ds.SetAccessRuleProtection(true, false); // disable inheritance and clear any inherited permissions
    dirInfo.SetAccessControl(ds);
}

只要我取消注释 var ds = new DirectorySecurity(); 行，代码就会被执行，但没有设置权限。

代码参考

作为参考，以下代码可能有用。调用代码如下所示：

System.Net.NetworkCredential cred = new System.Net.NetworkCredential("my_admin",pwd);
using (new NetworkConnection(@"\\my_fileserver\Data\Home", cred))
{
    string path = $@"\\my_fileserver\Data\Home\testuserfolder";
    string domainName = "my_domain";
    string userNameToCreate = "testuser";
    Directory.CreateDirectory(path);
    SetFullPermission(path, userNameToCreate);
}

调用SetFullPermission 的代码利用了How to provide user name and password when connecting to a network share 中的一个类，因为我的普通帐户对网络驱动器没有权限。

类NewNetworkConnection()如下：

using System;
using System.ComponentModel;
using System.Net;
using System.Runtime.InteropServices;

namespace FileInterface
{
    public class NetworkConnection : IDisposable
    {
        string _networkName;

        public NetworkConnection(string networkName,
            NetworkCredential credentials)
        {
            _networkName = networkName;

            var netResource = new NetResource()
            {
                Scope = ResourceScope.GlobalNetwork,
                ResourceType = ResourceType.Disk,
                DisplayType = ResourceDisplaytype.Share,
                RemoteName = networkName
            };

            var userName = string.IsNullOrEmpty(credentials.Domain)
                ? credentials.UserName
                : string.Format(@"{0}\{1}", credentials.Domain, credentials.UserName);

            var result = WNetAddConnection2(
                netResource,
                credentials.Password,
                userName,
                0);

            if (result != 0)
            {
                throw new Win32Exception(result);
            }
        }

        ~NetworkConnection()
        {
            Dispose(false);
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        protected virtual void Dispose(bool disposing)
        {
            WNetCancelConnection2(_networkName, 0, true);
        }

        [DllImport("mpr.dll")]
        private static extern int WNetAddConnection2(NetResource netResource,
            string password, string username, int flags);

        [DllImport("mpr.dll")]
        private static extern int WNetCancelConnection2(string name, int flags,
            bool force);
    }

    [StructLayout(LayoutKind.Sequential)]
    public class NetResource
    {
        public ResourceScope Scope;
        public ResourceType ResourceType;
        public ResourceDisplaytype DisplayType;
        public int Usage;
        public string LocalName;
        public string RemoteName;
        public string Comment;
        public string Provider;
    }

    public enum ResourceScope : int
    {
        Connected = 1,
        GlobalNetwork,
        Remembered,
        Recent,
        Context
    };

    public enum ResourceType : int
    {
        Any = 0,
        Disk = 1,
        Print = 2,
        Reserved = 8,
    }

    public enum ResourceDisplaytype : int
    {
        Generic = 0x0,
        Domain = 0x01,
        Server = 0x02,
        Share = 0x03,
        File = 0x04,
        Group = 0x05,
        Network = 0x06,
        Root = 0x07,
        Shareadmin = 0x08,
        Directory = 0x09,
        Tree = 0x0a,
        Ndscontainer = 0x0b
    }
}

解决方案参考

以下解决方案信息可能很重要：

• 解决方案有一个主项目Ticketing solution 目标.NET Core
• 问题代码所依赖的项目是一个.NET Framework 类库，目标是.NET framework 4.8

不同框架目标的原因是某些代码需要一个框架，其他代码或引用可能只适用于另一个。

Answer 1

在多目标解决方案中，必须使用 .net 核心代码，即使目标是 .Net Framework 4.8：

更改 GetAccessControl 和 SetAccesscontrol（请参阅未注释的行以了解差异）

public static void SetFullPermission(string path, string domainAccount)
{
    NTAccount ntaccount = new NTAccount("skan_nt1", domainAccount);
    var ds = new DirectorySecurity();
    DirectoryInfo dirInfo = new DirectoryInfo(path);
    ds = FileSystemAclExtensions.GetAccessControl(dirInfo);
    //ds = dirInfo.GetAccessControl();
    ds.AddAccessRule(new FileSystemAccessRule(ntaccount, FileSystemRights.FullControl, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.None, AccessControlType.Allow));
    ds.SetAccessRuleProtection(true, false); // disable inheritance and clear any inherited permissions
    FileSystemAclExtensions.SetAccessControl(dirInfo,ds);
    //Directory.SetAccessControl(path, ds);
}

另外，确保安装了 nuget 包：System.Security.AccessControl