EventWaitHandleSecurity.RemoveAccessRuleAll メソッドとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

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EventWaitHandleSecurity.RemoveAccessRuleAll メソッド

メモ : このメソッドは、.NET Framework version 2.0 で新しく追加されたものです。

指定した規則と同じユーザーおよび同じ AccessControlType (許可または拒否) が指定されたアクセス制御規則をすべて検索し、一致する規則が見つかった場合は、その規則を削除します。

名前空間: System.Security.AccessControl
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Sub RemoveAccessRuleAll ( _
    rule As EventWaitHandleAccessRule _
)

Visual Basic (使用法)

Dim instance As EventWaitHandleSecurity
Dim rule As EventWaitHandleAccessRule

instance.RemoveAccessRuleAll(rule)

public void RemoveAccessRuleAll (
    EventWaitHandleAccessRule rule
)

C++

public:
void RemoveAccessRuleAll (
    EventWaitHandleAccessRule^ rule
)

public void RemoveAccessRuleAll (
    EventWaitHandleAccessRule rule
)

JScript

public function RemoveAccessRuleAll (
    rule : EventWaitHandleAccessRule
)

パラメータ

rule: 検索対象のユーザーと AccessControlType を指定する EventWaitHandleAccessRule。この規則によって指定された権限はすべて無視されます。

例外

例外の種類	条件
ArgumentNullException	rule が null 参照 (Visual Basic では Nothing) です。

解説

現在の EventWaitHandleSecurity で、rule と同じユーザーおよび同じ AccessControlType 値が指定された規則が検索されます。この検索の実行時には、rule によって指定された権限はいずれも無視されます。一致する規則はすべて削除されます。一致する規則が見つからなかった場合、処理は実行されません。

使用例

RemoveAccessRuleAll メソッドを使用して、ユーザーと AccessControlType に一致するすべての規則を削除し、権限を無視するコード例を次に示します。

この例では、EventWaitHandleSecurity オブジェクトを作成し、現在のユーザーに関する各種の権限を許可または拒否する規則を追加して、それらの追加の規則を Allow 規則にマージします。さらに、この例では、現在のユーザーに所有権の取得を許可する新しい規則を作成し、その規則を使用して Allow 規則を EventWaitHandleSecurity オブジェクトから削除します。

メモ
この例では、セキュリティオブジェクトが EventWaitHandle オブジェクトに割り当てられません。セキュリティオブジェクトの割り当て例については、EventWaitHandle.GetAccessControl および EventWaitHandle.SetAccessControl のトピックを参照してください。

Visual Basic

Imports System
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

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
 */

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0

参照

関連項目
EventWaitHandleSecurity クラス
EventWaitHandleSecurity メンバ
System.Security.AccessControl 名前空間

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EventWaitHandleSecurity.RemoveAccessRuleAll メソッドとは？ わかりやすく解説

EventWaitHandleSecurity.RemoveAccessRuleAll メソッド

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EventWaitHandleSecurity.RemoveAccessRuleAll メソッドとは？わかりやすく解説