MutexSecurity.SetAccessRule(MutexAccessRule) Méthode

Définition

Supprime toutes les règles de contrôle d'accès ayant les mêmes utilisateur et AccessControlType (autorisation ou refus) que la règle spécifiée, puis ajoute la règle spécifiée.Removes all access control rules with the same user and AccessControlType (allow or deny) as the specified rule, and then adds the specified rule.

public:
 void SetAccessRule(System::Security::AccessControl::MutexAccessRule ^ rule);
public void SetAccessRule (System.Security.AccessControl.MutexAccessRule rule);
override this.SetAccessRule : System.Security.AccessControl.MutexAccessRule -> unit
Public Sub SetAccessRule (rule As MutexAccessRule)

Paramètres

rule
MutexAccessRule

MutexAccessRule à ajouter.The MutexAccessRule to add. L'utilisateur et le AccessControlType de cette règle déterminent les règles à supprimer avant l'ajout de celle-ci.The user and AccessControlType of this rule determine the rules to remove before this rule is added.

Exceptions

rule est null.rule is null.

Exemples

L’exemple de code suivant montre comment SetAccessRule la méthode supprime toutes les règles qui correspondent à la fois AccessControlType à rulel’utilisateur et au rulede, en les remplaçant par.The following code example shows how the SetAccessRule method removes all rules that match both the user and the AccessControlType of rule, replacing them with rule.

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 SetAccessRule la méthode pour remplacer la règle d’autorisation existante par la nouvelle règle.The example then creates a new rule that allows the current user full control, and uses the SetAccessRule method to replace the existing Allow rule with the new rule. La règle qui refuse l’accès n’est pas affectée.The rule that denies access is not affected.

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
        // SetAccessRule method to replace the 
        // existing Allow rule with the new rule. 
        rule = new MutexAccessRule(user,
            MutexRights.FullControl,
            AccessControlType.Allow);
        mSec.SetAccessRule(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: Deny
      Rights: ChangePermissions

        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
        ' SetAccessRule method to replace the 
        ' the existing Allow rule with the new rule. 
        rule = New MutexAccessRule(user, _
            MutexRights.FullControl, _
            AccessControlType.Allow)
        mSec.SetAccessRule(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: Deny
'      Rights: ChangePermissions
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: FullControl

Remarques

Si la règle spécifiée a Allowla valeur, l’effet de cette méthode est de Allow supprimer toutes les règles pour l’utilisateur spécifié, en les remplaçant par la règle spécifiée.If the specified rule has Allow, the effect of this method is to remove all Allow rules for the specified user, replacing them with the specified rule. Si la règle spécifiée possède Deny, toutes Deny les règles pour l’utilisateur spécifié sont remplacées par la règle spécifiée.If the specified rule has Deny, all Deny rules for the specified user are replaced with the specified rule.

S’il n’existe aucune règle dont l' AccessControlType utilisateur et correspond à la rule règle spécifiée, est ajouté.If there are no rules whose user and AccessControlType match the specified rule, rule is added.

S’applique à