EventWaitHandleRights Enumeration
Assembly: mscorlib (in mscorlib.dll)
| Member name | Description | |
|---|---|---|
| ChangePermissions | The right to change the security and audit rules associated with a named event. | |
| Delete | The right to delete a named event. | |
| FullControl | The right to exert full control over a named event, and to modify its access rules and audit rules. | |
| Modify | The right to set or reset the signaled state of a named event. | |
| ReadPermissions | The right to open and copy the access rules and audit rules for a named event. | |
| Synchronize | The right to wait on a named event. | |
| TakeOwnership | The right to change the owner of a named event. |
Use the EventWaitHandleRights enumeration to specify access control rights when you create EventWaitHandleAccessRule objects. To apply access rights to a named system event, first add EventWaitHandleAccessRule objects to an EventWaitHandleSecurity object, then attach the EventWaitHandleSecurity object to the named system event using the System.Threading.EventWaitHandle constructor or the EventWaitHandle.SetAccessControl method.
Note: |
|---|
| Security on synchronization objects is not supported for Windows 98 or Windows Millennium Edition. |
The following code example demonstrates the use of EventWaitHandleRights values when creating and using EventWaitHandleAccessRule objects. The example creates an EventWaitHandleSecurity object, adds rules that allow and deny various rights for the current user, and displays the resulting pair of rules. The example then allows new rights for the current user and displays the result, showing that the new rights are merged with the existing AccessControlType.Allow rule.
Note: |
|---|
| This example does not attach the security object to an EventWaitHandle object; see EventWaitHandleSecurity, EventWaitHandle.GetAccessControl method, and EventWaitHandle.SetAccessControl. |
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. EventWaitHandleAccessRule rule = new EventWaitHandleAccessRule(user, EventWaitHandleRights.Synchronize | EventWaitHandleRights.Modify, 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); // Add a rule that allows the current user the // right to read permissions on the event. This rule // is merged with the existing Allow rule. rule = new EventWaitHandleAccessRule(user, EventWaitHandleRights.ReadPermissions, AccessControlType.Allow); mSec.AddAccessRule(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, Synchronize Current access rules: User: TestDomain\TestUser Type: Deny Rights: ChangePermissions User: TestDomain\TestUser Type: Allow Rights: Modify, ReadPermissions, Synchronize */
Note: