MutexSecurity.RemoveAccessRuleAll(MutexAccessRule) 方法

定義

命名空間:

System.Security.AccessControl

組件:

System.Threading.AccessControl.dll

套件:

System.Threading.AccessControl v8.0.0

來源:

MutexSecurity.cs

搜尋與指定規則具有相同使用者和 AccessControlType (允許或拒絕) 的所有存取控制規則，如果找到的話，便加以移除。

public:
 void RemoveAccessRuleAll(System::Security::AccessControl::MutexAccessRule ^ rule);

public void RemoveAccessRuleAll (System.Security.AccessControl.MutexAccessRule rule);

override this.RemoveAccessRuleAll : System.Security.AccessControl.MutexAccessRule -> unit

Public Sub RemoveAccessRuleAll (rule As MutexAccessRule)

參數

rule

MutexAccessRule

MutexAccessRule，指定要搜尋的使用者和 AccessControlType。 忽略根據此規則指定的任何權限。

例外狀況

ArgumentNullException

rule 為 null。

範例

下列程式碼範例顯示 RemoveAccessRuleAll 方法會移除符合使用者和 的所有規則， AccessControlType 並忽略許可權。

此範例會建立 MutexSecurity 物件、新增規則，以允許和拒絕目前使用者的各種許可權，然後將其他許可權合併到 Allow 規則中。 然後，此範例會建立新的規則，讓目前的使用者能夠取得擁有權，並使用該規則從 MutexSecurity 物件中移除 Allow 規則。

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);

        // Create a rule that allows the current user to
        // change the owner of the mutex, and use that rule 
        // to remove the existing allow access rule from 
        // the MutexSecurity object, showing that the user
        // and access type must match, while the rights are
        // ignored.
        Console.WriteLine("Use RemoveAccessRuleAll to remove the Allow rule.");
        rule = new MutexAccessRule(user, 
            MutexRights.TakeOwnership, 
            AccessControlType.Allow);
        mSec.RemoveAccessRuleAll(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

Use RemoveAccessRuleAll to remove the Allow rule.

Current access rules:

        User: TestDomain\TestUser
        Type: Deny
      Rights: ChangePermissions
 */

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)

        ' Create a rule that allows the current user to
        ' change the owner of the mutex, and use that rule 
        ' to remove the existing allow access rule from 
        ' the MutexSecurity object, showing that the user
        ' and access type must match, while the rights are
        ' ignored.
        Console.WriteLine("Use RemoveAccessRuleAll to remove the Allow rule.")
        rule = New MutexAccessRule(user, _
            MutexRights.TakeOwnership, _
            AccessControlType.Allow)
        mSec.RemoveAccessRuleAll(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
'
'Use RemoveAccessRuleAll to remove the Allow rule.
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Deny
'      Rights: ChangePermissions

備註

目前 MutexSecurity 物件會搜尋具有相同使用者和相同 AccessControlType 值 rule 的規則。 執行此搜尋時，會忽略 所 rule 指定的任何許可權。 如果找不到相符的規則，則不會採取任何動作。