File.GetAccessControl 方法

參考

定義

命名空間:: System.IO

組件:: mscorlib.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

取得 FileSecurity 物件，該物件封裝指定檔案的存取控制清單 (ACL) 項目。

多載

GetAccessControl(String, AccessControlSections)	取得 FileSecurity 物件，該物件會封裝特定檔案之指定類型的存取控制清單 (ACL) 項目。
GetAccessControl(String)	取得 FileSecurity 物件，該物件封裝指定檔案的存取控制清單 (ACL) 項目。

備註

GetAccessControl使用方法來擷取指定檔案的存取控制清單 (ACL) 專案。

GetAccessControl(String, AccessControlSections)

取得 FileSecurity 物件，該物件會封裝特定檔案之指定類型的存取控制清單 (ACL) 項目。

public:
 static System::Security::AccessControl::FileSecurity ^ GetAccessControl(System::String ^ path, System::Security::AccessControl::AccessControlSections includeSections);

public static System.Security.AccessControl.FileSecurity GetAccessControl (string path, System.Security.AccessControl.AccessControlSections includeSections);

static member GetAccessControl : string * System.Security.AccessControl.AccessControlSections -> System.Security.AccessControl.FileSecurity

Public Shared Function GetAccessControl (path As String, includeSections As AccessControlSections) As FileSecurity

參數

path: String

檔案的路徑，包含 FileSecurity 物件，並描述檔案的存取控制清單 (ACL) 資訊。

includeSections: AccessControlSections

其中一個 AccessControlSections 值，指定要接收的存取控制清單 (ACL) 資訊之類型。

傳回

FileSecurity

FileSecurity 物件，該物件封裝 path 參數所描述之檔案的存取控制規則。

例外狀況

IOException

開啟檔案時發生 I/O 錯誤。

SEHException

path 參數為 null。

SystemException

找不到檔案。

UnauthorizedAccessException

path 參數指定了唯讀的檔案。

-或-

這個作業在目前平台不受支援。

-或-

path 參數指定了目錄。

-或-

呼叫端沒有必要的權限。

備註

GetAccessControl使用方法來擷取檔案的 ACL) 專案 (存取控制清單。

ACL 描述具有或沒有指定檔案上特定動作許可權的個人和/或群組。如需詳細資訊，請參閱如何：新增或移除存取控制清單項目。

在 NTFS 環境中，如果使用者具有 ListDirectory 父資料夾的許可權， ReadAttributes 則會 ReadExtendedAttributes 授與使用者。若要拒絕 ReadAttributes 和 ReadExtendedAttributes ，請在父目錄上拒絕 ListDirectory 。

適用於

GetAccessControl(String)

取得 FileSecurity 物件，該物件封裝指定檔案的存取控制清單 (ACL) 項目。

public:
 static System::Security::AccessControl::FileSecurity ^ GetAccessControl(System::String ^ path);

public static System.Security.AccessControl.FileSecurity GetAccessControl (string path);

static member GetAccessControl : string -> System.Security.AccessControl.FileSecurity

Public Shared Function GetAccessControl (path As String) As FileSecurity

參數

path: String

檔案的路徑，包含 FileSecurity 物件，並描述檔案的存取控制清單 (ACL) 資訊。

傳回

FileSecurity

FileSecurity 物件，該物件封裝 path 參數所描述之檔案的存取控制規則。

例外狀況

IOException

開啟檔案時發生 I/O 錯誤。

SEHException

path 參數為 null。

SystemException

找不到檔案。

UnauthorizedAccessException

path 參數指定了唯讀的檔案。

-或-

這個作業在目前平台不受支援。

-或-

path 參數指定了目錄。

-或-

呼叫端沒有必要的權限。

範例

下列程式碼範例會使用 GetAccessControl 和 SetAccessControl 方法，從檔案中新增和移除存取控制清單 (ACL) 專案。您必須提供有效的使用者或群組帳戶，才能執行這個範例。

using namespace System;
using namespace System::IO;
using namespace System::Security::AccessControl;

// Adds an ACL entry on the specified file for the specified account.

void AddFileSecurity(String^ fileName, String^ account, 
                        FileSystemRights rights, AccessControlType controlType)
{
    // Get a FileSecurity object that represents the 
    // current security settings.
    FileSecurity^ fSecurity = File::GetAccessControl(fileName);

    // Add the FileSystemAccessRule to the security settings. 
    fSecurity->AddAccessRule(gcnew FileSystemAccessRule
                                   (account,rights, controlType));

    // Set the new access settings.
    File::SetAccessControl(fileName, fSecurity);
}

// Removes an ACL entry on the specified file for the specified account.

void RemoveFileSecurity(String^ fileName, String^ account, 
                        FileSystemRights rights, AccessControlType controlType)
{

    // Get a FileSecurity object that represents the 
    // current security settings.
    FileSecurity^ fSecurity = File::GetAccessControl(fileName);

    // Remove the FileSystemAccessRule from the security settings. 
    fSecurity->RemoveAccessRule(gcnew FileSystemAccessRule
                                      (account,rights, controlType));

    // Set the new access settings.
    File::SetAccessControl(fileName, fSecurity);
}

int main()
{
    try
    {
        String^ fileName = "test.xml";

        Console::WriteLine("Adding access control entry for " + fileName);

        // Add the access control entry to the file.
        AddFileSecurity(fileName, "MYDOMAIN\\MyAccount", 
            FileSystemRights::ReadData, AccessControlType::Allow);

        Console::WriteLine("Removing access control entry from " + fileName);

        // Remove the access control entry from the file.
        RemoveFileSecurity(fileName, "MYDOMAIN\\MyAccount", 
            FileSystemRights::ReadData, AccessControlType::Allow);

        Console::WriteLine("Done.");
    }
    catch (Exception^ ex)
    {
        Console::WriteLine(ex->Message);
    }
}

using System;
using System.IO;
using System.Security.AccessControl;

namespace FileSystemExample
{
    class FileExample
    {
        public static void Main()
        {
            try
            {
                string fileName = "test.xml";

                Console.WriteLine("Adding access control entry for "
                    + fileName);

                // Add the access control entry to the file.
                AddFileSecurity(fileName, @"DomainName\AccountName",
                    FileSystemRights.ReadData, AccessControlType.Allow);

                Console.WriteLine("Removing access control entry from "
                    + fileName);

                // Remove the access control entry from the file.
                RemoveFileSecurity(fileName, @"DomainName\AccountName",
                    FileSystemRights.ReadData, AccessControlType.Allow);

                Console.WriteLine("Done.");
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
            }
        }

        // Adds an ACL entry on the specified file for the specified account.
        public static void AddFileSecurity(string fileName, string account,
            FileSystemRights rights, AccessControlType controlType)
        {

            // Get a FileSecurity object that represents the
            // current security settings.
            FileSecurity fSecurity = File.GetAccessControl(fileName);

            // Add the FileSystemAccessRule to the security settings.
            fSecurity.AddAccessRule(new FileSystemAccessRule(account,
                rights, controlType));

            // Set the new access settings.
            File.SetAccessControl(fileName, fSecurity);
        }

        // Removes an ACL entry on the specified file for the specified account.
        public static void RemoveFileSecurity(string fileName, string account,
            FileSystemRights rights, AccessControlType controlType)
        {

            // Get a FileSecurity object that represents the
            // current security settings.
            FileSecurity fSecurity = File.GetAccessControl(fileName);

            // Remove the FileSystemAccessRule from the security settings.
            fSecurity.RemoveAccessRule(new FileSystemAccessRule(account,
                rights, controlType));

            // Set the new access settings.
            File.SetAccessControl(fileName, fSecurity);
        }
    }
}

open System.IO
open System.Security.AccessControl

// Adds an ACL entry on the specified file for the specified account.
let addFileSecurity fileName (account: string) rights controlType =
    // Get a FileSecurity object that represents the
    // current security settings.
    let fSecurity = File.GetAccessControl fileName

    // Add the FileSystemAccessRule to the security settings.
    FileSystemAccessRule(account, rights, controlType)
    |> fSecurity.AddAccessRule

    // Set the new access settings.
    File.SetAccessControl(fileName, fSecurity)

// Removes an ACL entry on the specified file for the specified account.
let removeFileSecurity fileName (account: string) rights controlType =
    // Get a FileSecurity object that represents the
    // current security settings.
    let fSecurity = File.GetAccessControl fileName

    // Remove the FileSystemAccessRule from the security settings.
    fSecurity.RemoveAccessRule(FileSystemAccessRule(account, rights, controlType))
    |> ignore

    // Set the new access settings.
    File.SetAccessControl(fileName, fSecurity)

let fileName = "test.xml"

printfn $"Adding access control entry for {fileName}"

// Add the access control entry to the file.
addFileSecurity fileName @"DomainName\AccountName" FileSystemRights.ReadData AccessControlType.Allow

printfn $"Removing access control entry from {fileName}"

// Remove the access control entry from the file.
removeFileSecurity fileName @"DomainName\AccountName" FileSystemRights.ReadData AccessControlType.Allow

printfn "Done."

Imports System.IO
Imports System.Security.AccessControl



Module FileExample

    Sub Main()
        Try
            Dim fileName As String = "test.xml"

            Console.WriteLine("Adding access control entry for " & fileName)

            ' Add the access control entry to the file.
            AddFileSecurity(fileName, "DomainName\AccountName", _
                FileSystemRights.ReadData, AccessControlType.Allow)

            Console.WriteLine("Removing access control entry from " & fileName)

            ' Remove the access control entry from the file.
            RemoveFileSecurity(fileName, "DomainName\AccountName", _
                FileSystemRights.ReadData, AccessControlType.Allow)

            Console.WriteLine("Done.")
        Catch e As Exception
            Console.WriteLine(e)
        End Try

    End Sub


    ' Adds an ACL entry on the specified file for the specified account.
    Sub AddFileSecurity(ByVal fileName As String, ByVal account As String, _
        ByVal rights As FileSystemRights, ByVal controlType As AccessControlType)
  
        ' Get a FileSecurity object that represents the 
        ' current security settings.
        Dim fSecurity As FileSecurity = File.GetAccessControl(fileName)

        ' Add the FileSystemAccessRule to the security settings. 
        Dim accessRule As FileSystemAccessRule = _
            New FileSystemAccessRule(account, rights, controlType)

        fSecurity.AddAccessRule(accessRule)

        ' Set the new access settings.
        File.SetAccessControl(fileName, fSecurity)

    End Sub


    ' Removes an ACL entry on the specified file for the specified account.
    Sub RemoveFileSecurity(ByVal fileName As String, ByVal account As String, _
        ByVal rights As FileSystemRights, ByVal controlType As AccessControlType)

        ' Get a FileSecurity object that represents the 
        ' current security settings.
        Dim fSecurity As FileSecurity = File.GetAccessControl(fileName)

        ' Remove the FileSystemAccessRule from the security settings. 
        fSecurity.RemoveAccessRule(New FileSystemAccessRule(account, _
            rights, controlType))

        ' Set the new access settings.
        File.SetAccessControl(fileName, fSecurity)

    End Sub
End Module

備註

GetAccessControl使用方法來擷取檔案的 ACL) 專案 (存取控制清單。

ACL 描述具有或沒有指定檔案上特定動作許可權的個人和/或群組。如需詳細資訊，請參閱如何：新增或移除存取控制清單項目。

適用於

File.GetAccessControl 方法

定義

多載

備註

GetAccessControl(String, AccessControlSections)

參數

傳回

例外狀況

備註

適用於

GetAccessControl(String)

參數

傳回

例外狀況

範例

備註

適用於

意見反應

其他資源