EventWaitHandleAccessRule 类

参考

定义

命名空间:: System.Security.AccessControl

程序集:: System.Threading.AccessControl.dll

程序集:: mscorlib.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

表示一组允许或拒绝用户或组进行访问的权限。此类不能被继承。

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。

备注

此示例不将安全对象附加到对象 EventWaitHandle 。可以在其中找到 EventWaitHandle.GetAccessControl 附加安全对象的示例 EventWaitHandle.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.
        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。

备注

Windows访问控制安全性仅适用于命名系统事件。 EventWaitHandle如果对象表示本地事件，则访问控制无关紧要。

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。

备注

应用和删除规则时，基础访问控制条目会发生变化。如果可能，规则中的信息将合并，以保持最少的访问控制条目数。因此，当获取当前规则列表时，它可能与添加的所有规则的列表不完全相同。

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。

重要

对对象所做的更改 EventWaitHandleSecurity 不会影响命名事件的访问级别，直到调用 EventWaitHandle.SetAccessControl 方法以将更改的安全对象分配给命名事件。

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

EventWaitHandleAccessRule(IdentityReference, EventWaitHandleRights, AccessControlType)	初始化 EventWaitHandleAccessRule 类的新实例，指定此规则应用到的用户或组、访问权限以及是否允许或拒绝指定的访问权限。
EventWaitHandleAccessRule(String, EventWaitHandleRights, AccessControlType)	初始化 EventWaitHandleAccessRule 类的新实例，指定应用此规则的用户或组的名称、访问权限以及是否允许或拒绝指定的访问权限。

属性

AccessControlType	获取与此 AccessControlType 对象关联的 AccessRule 对象。 (继承自 AccessRule)
AccessMask	获取此规则的访问掩码。 (继承自 AuthorizationRule)
EventWaitHandleRights	获取访问规则允许或拒绝的权限。
IdentityReference	获取对其应用此规则的 IdentityReference。 (继承自 AuthorizationRule)
InheritanceFlags	获取用于确定子对象如何继承此规则的标志的值。 (继承自 AuthorizationRule)
IsInherited	获取一个值，该值指示此规则是否为显式设置或继承自父级容器对象。 (继承自 AuthorizationRule)
PropagationFlags	获取传播标志的值，该值确定如何将此规则的继承传播到子对象。仅当 InheritanceFlags 枚举的值不为 None 时，此属性才有意义。 (继承自 AuthorizationRule)

方法

Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
ToString()	返回表示当前对象的字符串。 (继承自 Object)

适用于

另请参阅

EventWaitHandleSecurity

EventWaitHandleAccessRule 类

定义

示例

注解

构造函数

属性

方法

适用于

另请参阅

其他资源