SemaphoreSecurity.ResetAccessRule(SemaphoreAccessRule) メソッド

定義

AccessControlType に関係なく、指定した規則と同じユーザーが指定されたすべてのアクセス制御規則を削除し、指定した規則を追加します。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::SemaphoreAccessRule ^ rule);
public void ResetAccessRule (System.Security.AccessControl.SemaphoreAccessRule rule);
override this.ResetAccessRule : System.Security.AccessControl.SemaphoreAccessRule -> unit
Public Sub ResetAccessRule (rule As SemaphoreAccessRule)

パラメーター

rule
SemaphoreAccessRule

追加する SemaphoreAccessRule です。The SemaphoreAccessRule to add. この規則で指定されたユーザーによって、この規則を追加する前に削除する規則が判断されます。The user specified by this rule determines the rules to remove before this rule is added.

例外

rulenull です。rule is null.

次のコード例では、ResetAccessRule メソッドによって、一致するユーザーのすべての規則が一致に対して指定された規則と置き換えられます。The following code example shows how the ResetAccessRule method replaces all rules for the matching user with the rule specified for the match.

この例では、SemaphoreSecurity オブジェクトを作成し、現在のユーザーに対してさまざまな権限を許可および拒否するルールを追加します。The example creates a SemaphoreSecurity object and adds rules that allow and deny various rights for the current user. この例では、現在のユーザーにフルコントロールを許可する新しいルールを作成し、ResetAccessRule メソッドを使用して、既存のルールを両方とも新しいルールに置き換えます。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.

注意

この例では、Semaphore オブジェクトにセキュリティオブジェクトをアタッチしません。This example does not attach the security object to a Semaphore object. セキュリティオブジェクトをアタッチする例については、Semaphore.GetAccessControlSemaphore.SetAccessControlを参照してください。Examples that attach security objects can be found in Semaphore.GetAccessControl and Semaphore.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.
        SemaphoreSecurity mSec = new SemaphoreSecurity();

        // Add a rule that grants the current user the 
        // right to enter or release the semaphore and read the
        // permissions on the semaphore.
        SemaphoreAccessRule rule = new SemaphoreAccessRule(user, 
            SemaphoreRights.Synchronize | SemaphoreRights.Modify
                | SemaphoreRights.ReadPermissions, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        // Add a rule that denies the current user the 
        // right to change permissions on the semaphore.
        rule = new SemaphoreAccessRule(user, 
            SemaphoreRights.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 semaphore. Use the
        // ResetAccessRule method to replace both of 
        // the existing rules with the new rule. 
        rule = new SemaphoreAccessRule(user,
            SemaphoreRights.FullControl,
            AccessControlType.Allow);
        mSec.ResetAccessRule(rule);

        ShowSecurity(mSec);
    }

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

        foreach(SemaphoreAccessRule 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.SemaphoreRights);
            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 SemaphoreSecurity()

        ' Add a rule that grants the current user the 
        ' right to enter or release the semaphore, and to 
        ' read its permissions.
        Dim rule As New SemaphoreAccessRule(user, _
            SemaphoreRights.Synchronize _
            Or SemaphoreRights.Modify _
            Or SemaphoreRights.ReadPermissions, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        ' Add a rule that denies the current user the 
        ' right to change permissions on the semaphore.
        rule = New SemaphoreAccessRule(user, _
            SemaphoreRights.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 semaphore. Use the
        ' ResetAccessRule method to replace both of 
        ' the existing rules with the new rule. 
        rule = New SemaphoreAccessRule(user, _
            SemaphoreRights.FullControl, _
            AccessControlType.Allow)
        mSec.ResetAccessRule(rule)

        ShowSecurity(mSec)
        
    End Sub 

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

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

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

注釈

ユーザーが指定した規則に一致するアクセス規則がない場合は、rule が追加されます。If there are no access rules whose user matches the specified rule, rule is added.

適用対象