EventWaitHandleSecurity.RemoveAccessRuleAll(EventWaitHandleAccessRule) Método
Definição
Importante
Algumas informações se referem a produtos de pré-lançamento que podem ser substancialmente modificados antes do lançamento. A Microsoft não oferece garantias, expressas ou implícitas, das informações aqui fornecidas.
Pesquisa por todas as regras de controle de acesso com o mesmo usuário e AccessControlType (permitir ou negar) como a regra especificada e, se encontradas, remove-as.
public:
void RemoveAccessRuleAll(System::Security::AccessControl::EventWaitHandleAccessRule ^ rule);public void RemoveAccessRuleAll (System.Security.AccessControl.EventWaitHandleAccessRule rule);override this.RemoveAccessRuleAll : System.Security.AccessControl.EventWaitHandleAccessRule -> unitPublic Sub RemoveAccessRuleAll (rule As EventWaitHandleAccessRule)Parâmetros
Um EventWaitHandleAccessRule que especifica o usuário e AccessControlType pelos quais pesquisar. Todos os direitos especificados por essa regra são ignorados.
Exceções
rule é null.
Exemplos
O exemplo de código a seguir mostra que o RemoveAccessRuleAll método remove todas as regras que correspondem ao usuário e AccessControlType, ignorando direitos.
O exemplo cria um EventWaitHandleSecurity objeto , adiciona regras que permitem e negam vários direitos para o usuário atual e mescla direitos adicionais à Allow regra. Em seguida, o exemplo cria uma nova regra que permite que o usuário atual assuma a propriedade e usa essa regra para remover a Allow regra do EventWaitHandleSecurity objeto .
Observação
Este exemplo não anexa o objeto de segurança a um EventWaitHandle objeto . Exemplos que anexam objetos de segurança podem ser encontrados em 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
Comentários
O atual EventWaitHandleSecurity é pesquisado por regras que têm o mesmo usuário e o mesmo AccessControlType valor que rule. Todos os direitos especificados por rule são ignorados ao executar essa pesquisa. Todas as regras correspondentes são removidas. Se nenhuma regra de correspondência for encontrada, nenhuma ação será tomada.
