EventWaitHandleSecurity.RemoveAccessRuleAll(EventWaitHandleAccessRule) Metodo

Definizione

Spazio dei nomi:

System.Security.AccessControl

Assembly:

System.Threading.AccessControl.dll

Pacchetto:

System.Threading.AccessControl v9.0.0-preview.4.24266.19

Origine:

EventWaitHandleSecurity.cs

Cerca tutte le regole di controllo di accesso con lo stesso utente e la stessa classe AccessControlType (consenso o negazione) della regola specificata e, se trovate, le rimuove.

public:
 void RemoveAccessRuleAll(System::Security::AccessControl::EventWaitHandleAccessRule ^ rule);

public void RemoveAccessRuleAll (System.Security.AccessControl.EventWaitHandleAccessRule rule);

override this.RemoveAccessRuleAll : System.Security.AccessControl.EventWaitHandleAccessRule -> unit

Public Sub RemoveAccessRuleAll (rule As EventWaitHandleAccessRule)

Parametri

rule

EventWaitHandleAccessRule

Classe EventWaitHandleAccessRule che specifica l'utente e la classe AccessControlType da ricercare. Qualsiasi diritto specificato da questa regola viene ignorato.

Eccezioni

ArgumentNullException

rule è null.

Esempio

Nell'esempio di codice seguente viene illustrato che il RemoveAccessRuleAll metodo rimuove tutte le regole che corrispondono all'utente e AccessControlType, ignorando i diritti.

Nell'esempio viene creato un EventWaitHandleSecurity oggetto , vengono aggiunte regole che consentono e negano vari diritti per l'utente corrente e quindi unisce diritti aggiuntivi nella Allow regola. Nell'esempio viene quindi creata una nuova regola che consente all'utente corrente di assumere la proprietà e usa tale regola per rimuovere la Allow regola dall'oggetto EventWaitHandleSecurity .

Nota

In questo esempio l'oggetto di sicurezza non viene associato a un EventWaitHandle oggetto . Esempi che collegano oggetti di sicurezza sono disponibili in EventWaitHandle.GetAccessControl e EventWaitHandle.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.
        EventWaitHandleSecurity mSec = new EventWaitHandleSecurity();

        // Add a rule that grants the current user the 
        // right to wait on or signal the event.
        EventWaitHandleAccessRule rule = new EventWaitHandleAccessRule(user, 
            EventWaitHandleRights.Synchronize | EventWaitHandleRights.Modify, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        // Add a rule that denies the current user the 
        // right to change permissions on the event.
        rule = new EventWaitHandleAccessRule(user, 
            EventWaitHandleRights.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 event. This rule
        // is merged with the existing Allow rule.
        rule = new EventWaitHandleAccessRule(user, 
            EventWaitHandleRights.ReadPermissions, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        ShowSecurity(mSec);

        // Create a rule that allows the current user to
        // take ownership of the event, and use that rule 
        // to remove the existing Allow rule from the
        // EventWaitHandleSecurity 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 EventWaitHandleAccessRule(user, 
            EventWaitHandleRights.TakeOwnership, 
            AccessControlType.Allow);
        mSec.RemoveAccessRuleAll(rule);

        ShowSecurity(mSec);
    }

    private static void ShowSecurity(EventWaitHandleSecurity security)
    {
        Console.WriteLine("\r\nCurrent access rules:\r\n");

        foreach(EventWaitHandleAccessRule 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.EventWaitHandleRights);
            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 EventWaitHandleSecurity()

        ' Add a rule that grants the current user the 
        ' right to wait on or signal the event.
        Dim rule As New EventWaitHandleAccessRule(user, _
            EventWaitHandleRights.Synchronize _
            Or EventWaitHandleRights.Modify, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        ' Add a rule that denies the current user the 
        ' right to change permissions on the event.
        rule = New EventWaitHandleAccessRule(user, _
            EventWaitHandleRights.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 event. This rule
        ' is merged with the existing Allow rule.
        rule = New EventWaitHandleAccessRule(user, _
            EventWaitHandleRights.ReadPermissions, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        ShowSecurity(mSec)

        ' Create a rule that allows the current user to
        ' take ownership of the event, and use that rule 
        ' to remove the existing allow access rule from 
        ' the EventWaitHandleSecurity 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 EventWaitHandleAccessRule(user, _
            EventWaitHandleRights.TakeOwnership, _
            AccessControlType.Allow)
        mSec.RemoveAccessRuleAll(rule)

        ShowSecurity(mSec)
        
    End Sub 

    Private Shared Sub ShowSecurity(ByVal security As EventWaitHandleSecurity)
        Console.WriteLine(vbCrLf & "Current access rules:" & vbCrLf)

        For Each ar As EventWaitHandleAccessRule In _
            security.GetAccessRules(True, True, GetType(NTAccount))

            Console.WriteLine("        User: {0}", ar.IdentityReference)
            Console.WriteLine("        Type: {0}", ar.AccessControlType)
            Console.WriteLine("      Rights: {0}", ar.EventWaitHandleRights)
            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

Commenti

Viene eseguita la ricerca delle EventWaitHandleSecurity regole che hanno lo stesso utente e lo stesso AccessControlType valore di rule. Tutti i diritti specificati da rule vengono ignorati durante l'esecuzione della ricerca. Tutte le regole di corrispondenza vengono rimosse. Se non vengono trovate regole di corrispondenza, non viene eseguita alcuna azione.