MutexSecurity.ResetAccessRule(MutexAccessRule) Metode
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Menghapus semua aturan kontrol akses dengan pengguna yang sama dengan aturan yang ditentukan, terlepas dari AccessControlType, lalu menambahkan aturan yang ditentukan.
public:
void ResetAccessRule(System::Security::AccessControl::MutexAccessRule ^ rule);
public void ResetAccessRule (System.Security.AccessControl.MutexAccessRule rule);
override this.ResetAccessRule : System.Security.AccessControl.MutexAccessRule -> unit
Public Sub ResetAccessRule (rule As MutexAccessRule)
Parameter
- rule
- MutexAccessRule
yang MutexAccessRule akan ditambahkan. Pengguna yang ditentukan oleh aturan ini menentukan aturan yang akan dihapus sebelum aturan ini ditambahkan.
Pengecualian
rule
adalah null
.
Contoh
Contoh kode berikut menunjukkan bagaimana ResetAccessRule metode mengganti semua aturan untuk pengguna yang cocok dengan aturan yang ditentukan untuk kecocokan.
Contoh membuat MutexSecurity objek dan menambahkan aturan yang mengizinkan dan menolak berbagai hak untuk pengguna saat ini. Contoh kemudian membuat aturan baru yang memungkinkan kontrol penuh pengguna saat ini, dan menggunakan ResetAccessRule metode untuk mengganti kedua aturan yang ada dengan aturan baru.
Catatan
Contoh ini tidak melampirkan objek keamanan ke Mutex objek. Contoh yang melampirkan objek keamanan dapat ditemukan di Mutex.GetAccessControl dan Mutex.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.
MutexSecurity mSec = new MutexSecurity();
// Add a rule that grants the current user the
// right to enter or release the mutex and read the
// permissions on the mutex.
MutexAccessRule rule = new MutexAccessRule(user,
MutexRights.Synchronize | MutexRights.Modify
| MutexRights.ReadPermissions,
AccessControlType.Allow);
mSec.AddAccessRule(rule);
// Add a rule that denies the current user the
// right to change permissions on the mutex.
rule = new MutexAccessRule(user,
MutexRights.ChangePermissions,
AccessControlType.Deny);
mSec.AddAccessRule(rule);
// Display the rules in the security object.
ShowSecurity(mSec);
// Create a rule that grants the current user
// the full control over the mutex. Use the
// ResetAccessRule method to replace both of
// the existing rules with the new rule.
rule = new MutexAccessRule(user,
MutexRights.FullControl,
AccessControlType.Allow);
mSec.ResetAccessRule(rule);
ShowSecurity(mSec);
}
private static void ShowSecurity(MutexSecurity security)
{
Console.WriteLine("\r\nCurrent access rules:\r\n");
foreach(MutexAccessRule 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.MutexRights);
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, ReadPermissions, Synchronize
Current access rules:
User: TestDomain\TestUser
Type: Allow
Rights: FullControl
*/
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 MutexSecurity()
' Add a rule that grants the current user the
' right to enter or release the mutex, and to
' read its permissions.
Dim rule As New MutexAccessRule(user, _
MutexRights.Synchronize _
Or MutexRights.Modify _
Or MutexRights.ReadPermissions, _
AccessControlType.Allow)
mSec.AddAccessRule(rule)
' Add a rule that denies the current user the
' right to change permissions on the mutex.
rule = New MutexAccessRule(user, _
MutexRights.ChangePermissions, _
AccessControlType.Deny)
mSec.AddAccessRule(rule)
' Display the rules in the security object.
ShowSecurity(mSec)
' Create a rule that grants the current user
' the full control over the mutex. Use the
' ResetAccessRule method to replace both of
' the existing rules with the new rule.
rule = New MutexAccessRule(user, _
MutexRights.FullControl, _
AccessControlType.Allow)
mSec.ResetAccessRule(rule)
ShowSecurity(mSec)
End Sub
Private Shared Sub ShowSecurity(ByVal security As MutexSecurity)
Console.WriteLine(vbCrLf & "Current access rules:" & vbCrLf)
For Each ar As MutexAccessRule In _
security.GetAccessRules(True, True, GetType(NTAccount))
Console.WriteLine(" User: {0}", ar.IdentityReference)
Console.WriteLine(" Type: {0}", ar.AccessControlType)
Console.WriteLine(" Rights: {0}", ar.MutexRights)
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, ReadPermissions, Synchronize
'
'
'Current access rules:
'
' User: TestDomain\TestUser
' Type: Allow
' Rights: FullControl
Keterangan
Jika tidak ada aturan akses yang penggunanya cocok dengan aturan yang ditentukan, rule
ditambahkan.