MutexAccessRule 建構函式

定義

命名空間:

System.Security.AccessControl

組件:

System.Threading.AccessControl.dll

套件:

System.Threading.AccessControl v8.0.0

初始化 MutexAccessRule 類別的新執行個體。

多載

MutexAccessRule(IdentityReference, MutexRights, AccessControlType)	初始化 MutexAccessRule 類別的新執行個體，指定套用此規則的使用者或群組、存取權限，以及允許還是拒絕指定的存取權限。
MutexAccessRule(String, MutexRights, AccessControlType)	初始化 MutexAccessRule 類別的新執行個體，指定套用此規則的使用者或群組名稱、存取權限，以及允許還是拒絕指定的存取權限。

MutexAccessRule(IdentityReference, MutexRights, AccessControlType)

來源:

MutexSecurity.cs

初始化 MutexAccessRule 類別的新執行個體，指定套用此規則的使用者或群組、存取權限，以及允許還是拒絕指定的存取權限。

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)

參數

identity

IdentityReference

適用這項規則的使用者或群組。 必須是型別 SecurityIdentifier，或是像是可以轉換成型別 NTAccount 的 SecurityIdentifier 的型別。

eventRights

MutexRights

MutexRights 值的位元組合，指定允許或拒絕的權限。

type

AccessControlType

其中一個 AccessControlType 值，指定允許還是拒絕權限。

例外狀況

ArgumentOutOfRangeException

eventRights 指定了無效的值。

-或-

type 指定了無效的值。

ArgumentNullException

identity 為 null。

-或-

eventRights 為零。

ArgumentException

identity 既不是 SecurityIdentifier 型別，也不是可以轉換成 NTAccount 型別的型別 (例如 SecurityIdentifier)。

備註

若要藉由呼叫 、 或 方法) 等候 Mutex (，使用者必須具有 MutexRights.Synchronize 存取權。 WaitAllWaitAnyWaitOne 若要釋放 mutex，請呼叫 ReleaseMutex 方法，使用者必須具有 MutexRights.Modify 存取權。

MutexAccessRule(String, MutexRights, AccessControlType)

來源:

MutexSecurity.cs

初始化 MutexAccessRule 類別的新執行個體，指定套用此規則的使用者或群組名稱、存取權限，以及允許還是拒絕指定的存取權限。

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)

參數

identity

String

套用這個規則的使用者或群組名稱。

eventRights

MutexRights

MutexRights 值的位元組合，指定允許或拒絕的權限。

type

AccessControlType

其中一個 AccessControlType 值，指定允許還是拒絕權限。

例外狀況

ArgumentOutOfRangeException

eventRights 指定了無效的值。

-或-

type 指定了無效的值。

ArgumentNullException

eventRights 為零。

ArgumentException

identity 為 null。

-或-

identity 是零長度字串

-或-

identity 的長度超過 512 個字元。

範例

下列程式碼範例示範如何使用這個建構函式來建立 MutexAccessRule 物件。 此範例會 MutexSecurity 建立 物件、新增允許和拒絕目前使用者各種許可權的規則，並顯示產生的規則組。 此範例接著會允許目前使用者的新許可權，並顯示結果，顯示新許可權會與現有 Allow 規則合併。

注意

這個範例不會將安全性物件附加至 Mutex 物件。 您可以在 和 Mutex.SetAccessControl 中找到 Mutex.GetAccessControl 附加安全性物件的範例。

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

備註

若要藉由呼叫 、 或 方法) 等候 Mutex (，使用者必須具有 MutexRights.Synchronize 存取權。 WaitAllWaitAnyWaitOne 若要釋放 mutex，請呼叫 ReleaseMutex 方法，使用者必須具有 MutexRights.Modify 存取權。

這個建構函式相當於建立 NTAccount 物件，方法是傳遞 identity 至 NTAccount.NTAccount(String) 建構函式，並將新建立 NTAccount 的物件傳遞至建 MutexAccessRule(IdentityReference, MutexRights, AccessControlType) 構函式。