FileSystemSecurity.RemoveAccessRule(FileSystemAccessRule) 方法
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
从当前文件或目录移除所有匹配的允许或拒绝访问控制列表 (ACL) 权限。
public:
bool RemoveAccessRule(System::Security::AccessControl::FileSystemAccessRule ^ rule);
public bool RemoveAccessRule (System.Security.AccessControl.FileSystemAccessRule rule);
override this.RemoveAccessRule : System.Security.AccessControl.FileSystemAccessRule -> bool
Public Function RemoveAccessRule (rule As FileSystemAccessRule) As Boolean
参数
- rule
- FileSystemAccessRule
一个 FileSystemAccessRule 对象,表示要从文件或目录中移除的访问控制列表 (ACL) 权限。
返回
如果访问规则已移除,则为 true
;否则为 false
。
例外
rule
参数为 null
。
示例
下面的代码示例使用 FileSecurity 类添加和删除访问控制列表, (ACL) 条目从文件中删除。 你必须提供有效的用户或组帐户以运行此示例。
using namespace System;
using namespace System::IO;
using namespace System::Security::AccessControl;
// Adds an ACL entry on the specified file for the specified account.
void AddFileSecurity(String^ fileName, String^ account,
FileSystemRights rights, AccessControlType controlType)
{
// Get a FileSecurity object that represents the
// current security settings.
FileSecurity^ fSecurity = File::GetAccessControl(fileName);
// Add the FileSystemAccessRule to the security settings.
fSecurity->AddAccessRule(gcnew FileSystemAccessRule
(account,rights, controlType));
// Set the new access settings.
File::SetAccessControl(fileName, fSecurity);
}
// Removes an ACL entry on the specified file for the specified account.
void RemoveFileSecurity(String^ fileName, String^ account,
FileSystemRights rights, AccessControlType controlType)
{
// Get a FileSecurity object that represents the
// current security settings.
FileSecurity^ fSecurity = File::GetAccessControl(fileName);
// Remove the FileSystemAccessRule from the security settings.
fSecurity->RemoveAccessRule(gcnew FileSystemAccessRule
(account,rights, controlType));
// Set the new access settings.
File::SetAccessControl(fileName, fSecurity);
}
int main()
{
try
{
String^ fileName = "test.xml";
Console::WriteLine("Adding access control entry for " + fileName);
// Add the access control entry to the file.
AddFileSecurity(fileName, "MYDOMAIN\\MyAccount",
FileSystemRights::ReadData, AccessControlType::Allow);
Console::WriteLine("Removing access control entry from " + fileName);
// Remove the access control entry from the file.
RemoveFileSecurity(fileName, "MYDOMAIN\\MyAccount",
FileSystemRights::ReadData, AccessControlType::Allow);
Console::WriteLine("Done.");
}
catch (Exception^ ex)
{
Console::WriteLine(ex->Message);
}
}
using System;
using System.IO;
using System.Security.AccessControl;
namespace FileSystemExample
{
class FileExample
{
public static void Main()
{
try
{
string fileName = "test.xml";
Console.WriteLine("Adding access control entry for "
+ fileName);
// Add the access control entry to the file.
AddFileSecurity(fileName, @"DomainName\AccountName",
FileSystemRights.ReadData, AccessControlType.Allow);
Console.WriteLine("Removing access control entry from "
+ fileName);
// Remove the access control entry from the file.
RemoveFileSecurity(fileName, @"DomainName\AccountName",
FileSystemRights.ReadData, AccessControlType.Allow);
Console.WriteLine("Done.");
}
catch (Exception e)
{
Console.WriteLine(e);
}
}
// Adds an ACL entry on the specified file for the specified account.
public static void AddFileSecurity(string fileName, string account,
FileSystemRights rights, AccessControlType controlType)
{
// Get a FileSecurity object that represents the
// current security settings.
FileSecurity fSecurity = File.GetAccessControl(fileName);
// Add the FileSystemAccessRule to the security settings.
fSecurity.AddAccessRule(new FileSystemAccessRule(account,
rights, controlType));
// Set the new access settings.
File.SetAccessControl(fileName, fSecurity);
}
// Removes an ACL entry on the specified file for the specified account.
public static void RemoveFileSecurity(string fileName, string account,
FileSystemRights rights, AccessControlType controlType)
{
// Get a FileSecurity object that represents the
// current security settings.
FileSecurity fSecurity = File.GetAccessControl(fileName);
// Remove the FileSystemAccessRule from the security settings.
fSecurity.RemoveAccessRule(new FileSystemAccessRule(account,
rights, controlType));
// Set the new access settings.
File.SetAccessControl(fileName, fSecurity);
}
}
}
Imports System.IO
Imports System.Security.AccessControl
Module FileExample
Sub Main()
Try
Dim fileName As String = "test.xml"
Console.WriteLine("Adding access control entry for " & fileName)
' Add the access control entry to the file.
AddFileSecurity(fileName, "DomainName\AccountName", _
FileSystemRights.ReadData, AccessControlType.Allow)
Console.WriteLine("Removing access control entry from " & fileName)
' Remove the access control entry from the file.
RemoveFileSecurity(fileName, "DomainName\AccountName", _
FileSystemRights.ReadData, AccessControlType.Allow)
Console.WriteLine("Done.")
Catch e As Exception
Console.WriteLine(e)
End Try
End Sub
' Adds an ACL entry on the specified file for the specified account.
Sub AddFileSecurity(ByVal fileName As String, ByVal account As String, _
ByVal rights As FileSystemRights, ByVal controlType As AccessControlType)
' Get a FileSecurity object that represents the
' current security settings.
Dim fSecurity As FileSecurity = File.GetAccessControl(fileName)
' Add the FileSystemAccessRule to the security settings.
Dim accessRule As FileSystemAccessRule = _
New FileSystemAccessRule(account, rights, controlType)
fSecurity.AddAccessRule(accessRule)
' Set the new access settings.
File.SetAccessControl(fileName, fSecurity)
End Sub
' Removes an ACL entry on the specified file for the specified account.
Sub RemoveFileSecurity(ByVal fileName As String, ByVal account As String, _
ByVal rights As FileSystemRights, ByVal controlType As AccessControlType)
' Get a FileSecurity object that represents the
' current security settings.
Dim fSecurity As FileSecurity = File.GetAccessControl(fileName)
' Remove the FileSystemAccessRule from the security settings.
fSecurity.RemoveAccessRule(New FileSystemAccessRule(account, _
rights, controlType))
' Set the new access settings.
File.SetAccessControl(fileName, fSecurity)
End Sub
End Module
注解
该方法RemoveAccessRule从当前FileSystemSecurity对象中删除所有匹配Deny的访问规则或所有匹配Allow的访问规则。 例如,可以使用此方法通过传递FileSystemAccessRule使用Deny值、Read值和用户帐户创建的对象来删除用户的所有Deny访问规则。 执行此操作时,该方法 RemoveAccessRule 会删除指定 Read 值或 Write 值的任何拒绝规则。
若要将新的或更改的访问控制列表 (ACL) 信息保存到文件中,请使用 SetAccessControl 或 SetAccessControl 方法。 若要将新的或更改的 ACL 信息保存到目录,请使用 SetAccessControl 或 SetAccessControl 方法。
若要从文件中检索 ACL 信息,请使用 GetAccessControl 或 GetAccessControl 方法。 若要从目录中检索 ACL 信息,请使用 GetAccessControl 或 GetAccessControl 方法。
在不设置 Synchronize 标志的情况下添加访问规则时,该 Synchronize 标志将自动添加到规则中。 如果稍后在不指定 Synchronize 标志的情况下删除规则,将自动删除该标志。