EventWaitHandleSecurity.ResetAccessRule(EventWaitHandleAccessRule) 方法

定義

命名空間:

System.Security.AccessControl

組件:

System.Threading.AccessControl.dll

來源:

EventWaitHandleSecurity.cs

移除與指定規則具有相同使用者的所有存取控制規則 (不論 AccessControlType 為何)，然後加入指定規則。

C#

public void ResetAccessRule(System.Security.AccessControl.EventWaitHandleAccessRule rule);

參數

rule

EventWaitHandleAccessRule

要加入的 EventWaitHandleAccessRule。 這個規則指定的使用者會決定在加入這項規則之前要移除的規則。

例外狀況

ArgumentNullException

rule 為 null。

範例

下列程式代碼範例示範 方法如何將 ResetAccessRule 比對使用者的所有規則取代為符合專案所指定的規則。

此範例會 EventWaitHandleSecurity 建立 物件，並新增規則，以允許和拒絕目前使用者的各種許可權。 然後，此範例會建立新的規則，以允許目前的使用者完全控制，並使用 ResetAccessRule 方法來將現有規則取代為新的規則。

備註

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

C#

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 and read the
        // permissions on the event.
        EventWaitHandleAccessRule rule = new EventWaitHandleAccessRule(user, 
            EventWaitHandleRights.Synchronize | EventWaitHandleRights.Modify
                | EventWaitHandleRights.ReadPermissions, 
            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);

        // Create a rule that grants the current user 
        // the full control over the event. Use the
        // ResetAccessRule method to replace both of 
        // the existing rules with the new rule. 
        rule = new EventWaitHandleAccessRule(user,
            EventWaitHandleRights.FullControl,
            AccessControlType.Allow);
        mSec.ResetAccessRule(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, ReadPermissions, Synchronize


Current access rules:

        User: TestDomain\TestUser
        Type: Allow
      Rights: FullControl
 */

備註

如果沒有使用者符合指定規則的存取規則， rule 就會新增。

適用於