MutexSecurity.ResetAccessRule(MutexAccessRule) MutexSecurity.ResetAccessRule(MutexAccessRule) MutexSecurity.ResetAccessRule(MutexAccessRule) MutexSecurity.ResetAccessRule(MutexAccessRule) Method

Définition

Supprime toutes les règles de contrôle d'accès ayant le même utilisateur que la règle spécifiée, indépendamment de AccessControlType, puis ajoute la règle spécifiée.Removes all access control rules with the same user as the specified rule, regardless of AccessControlType, and then adds the specified rule.

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)

Paramètres

rule
MutexAccessRule MutexAccessRule MutexAccessRule MutexAccessRule

MutexAccessRule à ajouter.The MutexAccessRule to add. L'utilisateur spécifié par cette règle détermine les règles à supprimer avant l'ajout de celle-ci.The user specified by this rule determines the rules to remove before this rule is added.

Exceptions

Exemples

L’exemple de code suivant montre comment ResetAccessRule la méthode remplace toutes les règles pour l’utilisateur correspondant par la règle spécifiée pour la correspondance.The following code example shows how the ResetAccessRule method replaces all rules for the matching user with the rule specified for the match.

L’exemple crée un MutexSecurity objet et ajoute des règles qui autorisent et refusent divers droits pour l’utilisateur actuel.The example creates a MutexSecurity object and adds rules that allow and deny various rights for the current user. L’exemple crée ensuite une nouvelle règle qui autorise le contrôle total de l’utilisateur actuel et utilise ResetAccessRule la méthode pour remplacer les deux règles existantes par la nouvelle règle.The example then creates a new rule that allows the current user full control, and uses the ResetAccessRule method to replace both of the existing rules with the new rule.

Notes

Cet exemple n’attache pas l’objet de sécurité à Mutex un objet.This example does not attach the security object to a Mutex object. Des exemples qui attachent des objets de sécurité Mutex.GetAccessControl sont Mutex.SetAccessControldisponibles dans et.Examples that attach security objects can be found in Mutex.GetAccessControl and 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

Remarques

S’il n’existe aucune règle d’accès dont l’utilisateur correspond à rule la règle spécifiée, est ajouté.If there are no access rules whose user matches the specified rule, rule is added.

S’applique à