MutexSecurity.AddAccessRule(MutexAccessRule) Méthode

Définition

Recherche une règle de contrôle d'accès correspondante avec laquelle la nouvelle règle peut être fusionnée.Searches for a matching access control rule with which the new rule can be merged. Ajoute la nouvelle règle en cas de recherche infructueuse.If none are found, adds the new rule.

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

Paramètres

rule
MutexAccessRule

Règle de contrôle d'accès à ajouter.The access control rule to add.

Exceptions

rule est null.rule is null.

rule ne peut pas être mappé à une identité connue.rule cannot be mapped to a known identity.

Exemples

L’exemple de code suivant illustre la séparation Allow entre les Deny règles et les règles et affiche la combinaison de droits dans les règles compatibles.The following code example demonstrates the separation between Allow rules and Deny rules, and shows the combination of rights in compatible rules. L’exemple crée un MutexSecurity objet, ajoute des règles qui autorisent et refusent différents droits pour l’utilisateur actuel et affiche la paire de règles résultante.The example creates a MutexSecurity object, adds rules that allow and deny various rights for the current user, and displays the resulting pair of rules. L’exemple autorise ensuite de nouveaux droits pour l’utilisateur actuel et affiche le résultat, indiquant que les nouveaux droits sont fusionnés avec la Allow règle existante.The example then allows new rights for the current user and displays the result, showing that the new rights are merged with the existing Allow 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. Vous trouverez des exemples d’attachement d’objets de Mutex.GetAccessControlsécurité dans. Mutex.SetAccessControlExamples that attach security objects can be found in Mutex.GetAccessControlMutex.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.
        MutexAccessRule rule = new MutexAccessRule(user, 
            MutexRights.Synchronize | MutexRights.Modify, 
            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);

        // Add a rule that allows the current user the 
        // right to read permissions on the mutex. This rule
        // is merged with the existing Allow rule.
        rule = new MutexAccessRule(user, 
            MutexRights.ReadPermissions, 
            AccessControlType.Allow);
        mSec.AddAccessRule(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, Synchronize


Current access rules:

        User: TestDomain\TestUser
        Type: Deny
      Rights: ChangePermissions

        User: TestDomain\TestUser
        Type: Allow
      Rights: Modify, ReadPermissions, Synchronize
 */
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.
        Dim rule As New MutexAccessRule(user, _
            MutexRights.Synchronize _
            Or MutexRights.Modify, _
            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)

        ' Add a rule that allows the current user the 
        ' right to read permissions on the mutex. This rule
        ' is merged with the existing Allow rule.
        rule = New MutexAccessRule(user, _
            MutexRights.ReadPermissions, _
            AccessControlType.Allow)
        mSec.AddAccessRule(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, Synchronize
'
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Deny
'      Rights: ChangePermissions
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: Modify, ReadPermissions, Synchronize

Remarques

La AddAccessRule méthode recherche des règles avec le même utilisateur ou groupe et la même AccessControlType que rule.The AddAccessRule method searches for rules with the same user or group and the same AccessControlType as rule. Si aucune valeur n’est rule trouvée, est ajouté.If none are found, rule is added. Si une règle de correspondance est trouvée, les droits rule dans sont fusionnés avec la règle existante.If a matching rule is found, the rights in rule are merged with the existing rule.

S’applique à