SemaphoreSecurity.RemoveAccessRuleAll(SemaphoreAccessRule) Metode
Definisi
Penting
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Mencari semua aturan kontrol akses dengan pengguna yang sama dan AccessControlType (izinkan atau tolak) sebagai aturan yang ditentukan dan, jika ditemukan, akan menghapusnya.
public:
void RemoveAccessRuleAll(System::Security::AccessControl::SemaphoreAccessRule ^ rule);public void RemoveAccessRuleAll(System.Security.AccessControl.SemaphoreAccessRule rule);override this.RemoveAccessRuleAll : System.Security.AccessControl.SemaphoreAccessRule -> unitPublic Sub RemoveAccessRuleAll (rule As SemaphoreAccessRule)Parameter
- rule
- SemaphoreAccessRule
SemaphoreAccessRule Yang menentukan pengguna dan AccessControlType untuk dicari. Hak apa pun yang ditentukan oleh aturan ini diabaikan.
Pengecualian
rule adalah null.
Contoh
Contoh kode berikut menunjukkan bahwa RemoveAccessRuleAll metode menghapus semua aturan yang cocok dengan pengguna dan AccessControlType, mengabaikan hak.
Contoh membuat SemaphoreSecurity objek, menambahkan aturan yang mengizinkan dan menolak berbagai hak untuk pengguna saat ini, lalu menggabungkan hak tambahan ke Allow dalam aturan. Contoh kemudian membuat aturan baru yang memungkinkan pengguna saat ini untuk mengambil kepemilikan, dan menggunakan aturan tersebut Allow untuk menghapus aturan dari SemaphoreSecurity objek.
Note
Contoh ini tidak melampirkan objek keamanan ke Semaphore objek. Contoh yang melampirkan objek keamanan dapat ditemukan di Semaphore.GetAccessControl dan Semaphore.SetAccessControl.
using System;
using System.Threading;
using System.Security.AccessControl;
using System.Security.Principal;
public class Example
{
public static void Main()
{
// Create a string representing the current user.
string user = Environment.UserDomainName + "\\" +
Environment.UserName;
// Create a security object that grants no access.
SemaphoreSecurity mSec = new SemaphoreSecurity();
// Add a rule that grants the current user the
// right to enter or release the semaphore.
SemaphoreAccessRule rule = new SemaphoreAccessRule(user,
SemaphoreRights.Synchronize | SemaphoreRights.Modify,
AccessControlType.Allow);
mSec.AddAccessRule(rule);
// Add a rule that denies the current user the
// right to change permissions on the semaphore.
rule = new SemaphoreAccessRule(user,
SemaphoreRights.ChangePermissions,
AccessControlType.Deny);
mSec.AddAccessRule(rule);
// Display the rules in the security object.
ShowSecurity(mSec);
// Add a rule that allows the current user the
// right to read permissions on the semaphore. This rule
// is merged with the existing Allow rule.
rule = new SemaphoreAccessRule(user,
SemaphoreRights.ReadPermissions,
AccessControlType.Allow);
mSec.AddAccessRule(rule);
ShowSecurity(mSec);
// Create a rule that allows the current user to
// change the owner of the semaphore, and use that rule
// to remove the existing allow access rule from
// the SemaphoreSecurity object, showing that the user
// and access type must match, while the rights are
// ignored.
Console.WriteLine("Use RemoveAccessRuleAll to remove the Allow rule.");
rule = new SemaphoreAccessRule(user,
SemaphoreRights.TakeOwnership,
AccessControlType.Allow);
mSec.RemoveAccessRuleAll(rule);
ShowSecurity(mSec);
}
private static void ShowSecurity(SemaphoreSecurity security)
{
Console.WriteLine("\r\nCurrent access rules:\r\n");
foreach(SemaphoreAccessRule ar in
security.GetAccessRules(true, true, typeof(NTAccount)))
{
Console.WriteLine(" User: {0}", ar.IdentityReference);
Console.WriteLine(" Type: {0}", ar.AccessControlType);
Console.WriteLine(" Rights: {0}", ar.SemaphoreRights);
Console.WriteLine();
}
}
}
/*This code example produces output similar to following:
Current access rules:
User: TestDomain\TestUser
Type: Deny
Rights: ChangePermissions
User: TestDomain\TestUser
Type: Allow
Rights: Modify, Synchronize
Current access rules:
User: TestDomain\TestUser
Type: Deny
Rights: ChangePermissions
User: TestDomain\TestUser
Type: Allow
Rights: Modify, ReadPermissions, Synchronize
Use RemoveAccessRuleAll to remove the Allow rule.
Current access rules:
User: TestDomain\TestUser
Type: Deny
Rights: ChangePermissions
*/
Imports System.Threading
Imports System.Security.AccessControl
Imports System.Security.Principal
Public Class Example
Public Shared Sub Main()
' Create a string representing the current user.
Dim user As String = Environment.UserDomainName _
& "\" & Environment.UserName
' Create a security object that grants no access.
Dim mSec As New SemaphoreSecurity()
' Add a rule that grants the current user the
' right to enter or release the semaphore.
Dim rule As New SemaphoreAccessRule(user, _
SemaphoreRights.Synchronize _
Or SemaphoreRights.Modify, _
AccessControlType.Allow)
mSec.AddAccessRule(rule)
' Add a rule that denies the current user the
' right to change permissions on the semaphore.
rule = New SemaphoreAccessRule(user, _
SemaphoreRights.ChangePermissions, _
AccessControlType.Deny)
mSec.AddAccessRule(rule)
' Display the rules in the security object.
ShowSecurity(mSec)
' Add a rule that allows the current user the
' right to read permissions on the semaphore. This rule
' is merged with the existing Allow rule.
rule = New SemaphoreAccessRule(user, _
SemaphoreRights.ReadPermissions, _
AccessControlType.Allow)
mSec.AddAccessRule(rule)
ShowSecurity(mSec)
' Create a rule that allows the current user to
' change the owner of the semaphore, and use that rule
' to remove the existing allow access rule from
' the SemaphoreSecurity object, showing that the user
' and access type must match, while the rights are
' ignored.
Console.WriteLine("Use RemoveAccessRuleAll to remove the Allow rule.")
rule = New SemaphoreAccessRule(user, _
SemaphoreRights.TakeOwnership, _
AccessControlType.Allow)
mSec.RemoveAccessRuleAll(rule)
ShowSecurity(mSec)
End Sub
Private Shared Sub ShowSecurity(ByVal security As SemaphoreSecurity)
Console.WriteLine(vbCrLf & "Current access rules:" & vbCrLf)
For Each ar As SemaphoreAccessRule In _
security.GetAccessRules(True, True, GetType(NTAccount))
Console.WriteLine(" User: {0}", ar.IdentityReference)
Console.WriteLine(" Type: {0}", ar.AccessControlType)
Console.WriteLine(" Rights: {0}", ar.SemaphoreRights)
Console.WriteLine()
Next
End Sub
End Class
'This code example produces output similar to following:
'
'Current access rules:
'
' User: TestDomain\TestUser
' Type: Deny
' Rights: ChangePermissions
'
' User: TestDomain\TestUser
' Type: Allow
' Rights: Modify, Synchronize
'
'
'Current access rules:
'
' User: TestDomain\TestUser
' Type: Deny
' Rights: ChangePermissions
'
' User: TestDomain\TestUser
' Type: Allow
' Rights: Modify, ReadPermissions, Synchronize
'
'Use RemoveAccessRuleAll to remove the Allow rule.
'
'Current access rules:
'
' User: TestDomain\TestUser
' Type: Deny
' Rights: ChangePermissions
Keterangan
Objek saat ini SemaphoreSecurity dicari untuk aturan yang memiliki pengguna yang sama dan nilai yang sama AccessControlType dengan rule. Hak apa pun yang ditentukan oleh rule diabaikan saat melakukan pencarian ini. Jika tidak ada aturan yang cocok yang ditemukan, tidak ada tindakan yang diambil.
