EventWaitHandleAccessRule 类

定义

public ref class EventWaitHandleAccessRule sealed : System::Security::AccessControl::AccessRule

public sealed class EventWaitHandleAccessRule : System.Security.AccessControl.AccessRule

[System.Security.SecurityCritical]
public sealed class EventWaitHandleAccessRule : System.Security.AccessControl.AccessRule

type EventWaitHandleAccessRule = class
    inherit AccessRule

[<System.Security.SecurityCritical>]
type EventWaitHandleAccessRule = class
    inherit AccessRule

Public NotInheritable Class EventWaitHandleAccessRule
Inherits AccessRule

继承

Object

AuthorizationRule

AccessRule

EventWaitHandleAccessRule

属性

SecurityCriticalAttribute

示例

下面的代码示例演示如何创建和使用 EventWaitHandleAccessRule 对象。 该示例创建一个 EventWaitHandleSecurity 对象，添加允许和拒绝当前用户的各种权限的规则，并显示生成的规则对。 然后，该示例允许当前用户的新权限并显示结果，显示新权限与现有 Allow 规则合并。

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);
    }

    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
 */

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)

    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

注解

该EventWaitHandleAccessRule类是.NET Framework提供的一组类，用于管理命名系统事件的Windows访问控制安全性。 有关这些类的概述及其与基础Windows访问控制结构的关系，请参阅EventWaitHandleSecurity。

若要获取当前应用于命名事件的规则列表，请使用 EventWaitHandle.GetAccessControl 该方法获取对象 EventWaitHandleSecurity ，然后使用其 GetAccessRules 方法获取对象的集合 EventWaitHandleAccessRule 。

EventWaitHandleAccessRule 对象不映射一对一的访问控制条目，在基础自由访问控制列表中 (DACL) 。 获取事件的所有访问规则集时，该集包含当前表示所有访问控制条目所需的最小规则数。

使用 EventWaitHandleAccessRule 对象指定允许或拒绝用户或组的访问权限。 对象 EventWaitHandleAccessRule 始终表示允许的访问或拒绝访问，从不同时表示这两者。

若要将规则应用于命名系统事件，请使用 EventWaitHandle.GetAccessControl 该方法获取 EventWaitHandleSecurity 对象。 EventWaitHandleSecurity使用其方法添加规则来修改对象，然后使用EventWaitHandle.SetAccessControl该方法重新附加安全对象。

EventWaitHandleAccessRule 对象是不可变的。 使用类的方法 EventWaitHandleSecurity 修改事件的安全性，以添加或删除规则;执行此操作时，将修改基础访问控制条目。

构造函数

属性

方法

适用于

另请参阅

• EventWaitHandleSecurity