MutexAccessRule 构造函数

定义

命名空间:

System.Security.AccessControl

程序集:

System.Threading.AccessControl.dll

初始化 MutexAccessRule 类的新实例。

重载

MutexAccessRule(IdentityReference, MutexRights, AccessControlType)	初始化 MutexAccessRule 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。
MutexAccessRule(String, MutexRights, AccessControlType)	初始化 MutexAccessRule 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。

MutexAccessRule(IdentityReference, MutexRights, AccessControlType)

初始化 MutexAccessRule 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。

public:
 MutexAccessRule(System::Security::Principal::IdentityReference ^ identity, System::Security::AccessControl::MutexRights eventRights, System::Security::AccessControl::AccessControlType type);

public MutexAccessRule (System.Security.Principal.IdentityReference identity, System.Security.AccessControl.MutexRights eventRights, System.Security.AccessControl.AccessControlType type);

new System.Security.AccessControl.MutexAccessRule : System.Security.Principal.IdentityReference * System.Security.AccessControl.MutexRights * System.Security.AccessControl.AccessControlType -> System.Security.AccessControl.MutexAccessRule

Public Sub New (identity As IdentityReference, eventRights As MutexRights, type As AccessControlType)

参数

identity

IdentityReference

此规则应用到的用户或组。 必须为 SecurityIdentifier 类型，或可以转换为 NTAccount 类型的类型，如 SecurityIdentifier。

eventRights

MutexRights

MutexRights 值的按位组合，它指定允许或拒绝的权限。

type

AccessControlType

AccessControlType 值之一，用于指定是允许还是拒绝相应权限。

例外

ArgumentOutOfRangeException

eventRights 指定了一个无效值。

- 或 -

type 指定了一个无效值。

ArgumentNullException

identity 为 null。

- 或 -

eventRights 为零。

ArgumentException

identity 既不属于类型 SecurityIdentifier，也不属于可以转换为 NTAccount 类型的类型（如 SecurityIdentifier）。

注解

若要通过调用 WaitOneWaitAny) 或 WaitAll 方法等待 Mutex (，用户必须具有MutexRights.Synchronize访问权限。 若要释放互斥体，通过调用 ReleaseMutex 方法，用户必须具有 MutexRights.Modify 访问权限。

MutexAccessRule(String, MutexRights, AccessControlType)

初始化 MutexAccessRule 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。

public:
 MutexAccessRule(System::String ^ identity, System::Security::AccessControl::MutexRights eventRights, System::Security::AccessControl::AccessControlType type);

public MutexAccessRule (string identity, System.Security.AccessControl.MutexRights eventRights, System.Security.AccessControl.AccessControlType type);

new System.Security.AccessControl.MutexAccessRule : string * System.Security.AccessControl.MutexRights * System.Security.AccessControl.AccessControlType -> System.Security.AccessControl.MutexAccessRule

Public Sub New (identity As String, eventRights As MutexRights, type As AccessControlType)

参数

identity

String

应用此规则的用户或组的名称。

eventRights

MutexRights

MutexRights 值的按位组合，它指定允许或拒绝的权限。

type

AccessControlType

AccessControlType 值之一，用于指定是允许还是拒绝相应权限。

例外

ArgumentOutOfRangeException

eventRights 指定了一个无效值。

- 或 -

type 指定了一个无效值。

ArgumentNullException

eventRights 为零。

ArgumentException

identity 为 null。

- 或 -

identity 是一个长度为零的字符串。

- 或 -

identity 的长度超过 512 个字符。

示例

下面的代码示例演示如何使用此构造函数创建 MutexAccessRule 对象。 该示例创建一个 MutexSecurity 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，该示例为当前用户允许新权限并显示结果，显示新权限与现有 Allow 规则合并。

注意

此示例不将安全对象附加到 对象 Mutex 。 可以在 和 Mutex.SetAccessControl中找到Mutex.GetAccessControl附加安全对象的示例。

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.
        MutexAccessRule rule = new MutexAccessRule(user, 
            MutexRights.Synchronize | MutexRights.Modify, 
            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);

        // Add a rule that allows the current user the 
        // right to read permissions on the mutex. This rule
        // is merged with the existing Allow rule.
        rule = new MutexAccessRule(user, 
            MutexRights.ReadPermissions, 
            AccessControlType.Allow);
        mSec.AddAccessRule(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, 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 MutexSecurity()

        ' Add a rule that grants the current user the 
        ' right to enter or release the mutex.
        Dim rule As New MutexAccessRule(user, _
            MutexRights.Synchronize _
            Or MutexRights.Modify, _
            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)

        ' Add a rule that allows the current user the 
        ' right to read permissions on the mutex. This rule
        ' is merged with the existing Allow rule.
        rule = New MutexAccessRule(user, _
            MutexRights.ReadPermissions, _
            AccessControlType.Allow)
        mSec.AddAccessRule(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, Synchronize
'
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Deny
'      Rights: ChangePermissions
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: Modify, ReadPermissions, Synchronize

注解

若要通过调用 WaitOneWaitAny) 或 WaitAll 方法等待 Mutex (，用户必须具有MutexRights.Synchronize访问权限。 若要释放互斥体，通过调用 ReleaseMutex 方法，用户必须具有 MutexRights.Modify 访问权限。

此构造函数等效于NTAccount通过传递给identityNTAccount.NTAccount(String)构造函数并将新创建NTAccount的对象传递给构造函数来创建对象MutexAccessRule(IdentityReference, MutexRights, AccessControlType)。