MutexSecurity.ResetAccessRule メソッド
アセンブリ: mscorlib (mscorlib.dll 内)




ResetAccessRule メソッドが、一致するユーザーのすべての規則を一致検索に指定した規則に置換する方法を表したコード例を次に示します。
この例では、MutexSecurity オブジェクトを作成し、現在のユーザーの各種権限を許可および拒否する規則を追加します。さらに、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規則を作成し、ResetAccessRule メソッドを使用して既存の両方の規則を新しい規則に置換します。
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この例では、セキュリティ オブジェクトが Mutex 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、Mutex.GetAccessControl および Mutex.SetAccessControl のトピックを参照してください。 |
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 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
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 */

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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