MutexAccessRule 建構函式
定義
重要
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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)
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.MutexAccessRulePublic 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
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
Mutex 若要藉由呼叫 WaitOne或 WaitAnyWaitAll 方法) 等候 (，用戶必須具有MutexRights.Synchronize存取權。 若要釋放 mutex，請藉由呼叫 ReleaseMutex 方法，用戶必須具有存取權 MutexRights.Modify 。
適用於
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。
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.MutexAccessRulePublic 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
eventRights 為零。
範例
下列程式代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、新增規則，以允許和拒絕目前使用者的各種許可權，並顯示產生的規則組。 然後，此範例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
Mutex 若要藉由呼叫 WaitOne或 WaitAnyWaitAll 方法) 等候 (，用戶必須具有MutexRights.Synchronize存取權。 若要釋放 mutex，請藉由呼叫 ReleaseMutex 方法，用戶必須具有存取權 MutexRights.Modify 。
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 的對象傳遞至 MutexAccessRule(IdentityReference, MutexRights, AccessControlType) 建構函式。
