PrincipalPermissionAttribute(SecurityAction) 建構函式

定義

命名空間:

System.Security.Permissions

組件:

System.Security.Permissions.dll

套件:

System.Security.Permissions v9.0.0-preview.3.24172.9

來源:

PrincipalPermissionAttribute.cs

警告

PrincipalPermissionAttribute is not honored by the runtime and must not be used.

使用指定的 PrincipalPermissionAttribute 初始化 SecurityAction 類別的新執行個體。

public:
 PrincipalPermissionAttribute(System::Security::Permissions::SecurityAction action);

[System.Obsolete("PrincipalPermissionAttribute is not honored by the runtime and must not be used.", true, DiagnosticId="SYSLIB0002", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public PrincipalPermissionAttribute (System.Security.Permissions.SecurityAction action);

[<System.Obsolete("PrincipalPermissionAttribute is not honored by the runtime and must not be used.", true, DiagnosticId="SYSLIB0002", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
new System.Security.Permissions.PrincipalPermissionAttribute : System.Security.Permissions.SecurityAction -> System.Security.Permissions.PrincipalPermissionAttribute

Public Sub New (action As SecurityAction)

參數

action

SecurityAction

其中一個 SecurityAction 值。

屬性

ObsoleteAttribute

範例

下列範例示範如何使用 建 PrincipalPermissionAttribute 構函式來要求目前的用戶是系統管理員。

注意

在 Windows Vista 中，使用者帳戶控制 (UAC) 會判斷使用者的權限。 如果您是內建 Administrators 群組的成員，系統會將兩個執行階段存取語彙基元 (Token) 指派給您：標準使用者存取語彙基元及管理員存取語彙基元。 根據預設，您會屬於標準使用者角色。 若要執行需要您是系統管理員的程式碼，您必須先將權限從標準使用者提高為系統管理員。 您可以在啟動應用程式時，以滑鼠右鍵按一下應用程式圖示，並指出您想要以系統管理員身分執行，藉此提高為系統管理員權限。

using namespace System;
using namespace System::Security;
using namespace System::Security::Permissions;
using namespace System::Security::Policy;
using namespace System::Security::Principal;

[PrincipalPermission(SecurityAction::Demand, Role = "Administrators")]
void CheckAdministrator()
{
    Console::WriteLine("User is an administrator.");
}
int main(array<System::String ^> ^args)
{
    try
    {
        // Must set PrincipalPolicy to WindowsPrincipal
        AppDomain::CurrentDomain->SetPrincipalPolicy(PrincipalPolicy::WindowsPrincipal);
        // Check using declarative security.
        CheckAdministrator();
        // Check using Imperative security.
        System::String^ null;
        PrincipalPermission^ principalPerm = gcnew PrincipalPermission(null, "Administrators" );
        principalPerm->Demand();
        Console::WriteLine("Demand succeeded");
    }
    catch (Exception ^e)
    {
        Console::WriteLine(e->Message);
    }
    return 0;
}

using System;
using System.Threading;
using System.Security.Permissions;
using System.Security.Principal;

class SecurityPrincipalDemo
{
    public static void Main()
    {
        try
        {
            // PrincipalPolicy must be set to WindowsPrincipal to check roles.
            AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
            // Check using the PrincipalPermissionAttribute
            CheckAdministrator();
            // Check using PrincipalPermission class.
            PrincipalPermission principalPerm = new PrincipalPermission(null, "Administrators");
            principalPerm.Demand();
            Console.WriteLine("Demand succeeded.");
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
    }
    [PrincipalPermission(SecurityAction.Demand, Role = "Administrators")]
    static void CheckAdministrator()
    {
        Console.WriteLine("User is an administrator");
    }
}

Imports System.Threading
Imports System.Security.Permissions
Imports System.Security.Principal



Class SecurityPrincipalDemo

    Public Shared Sub Main()
        Try
            ' PrincipalPolicy must be set to WindowsPrincipal to check roles.
            AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal)
            ' Check using the PrincipalPermissionAttribute
            CheckAdministrator()
            ' Check using PrincipalPermission class.
            Dim principalPerm As New PrincipalPermission(Nothing, "Administrators")
            principalPerm.Demand()
            Console.WriteLine("Demand succeeded.")
        Catch e As Exception
            Console.WriteLine(e.Message)
        End Try

    End Sub

    <PrincipalPermission(SecurityAction.Demand, Role:="Administrators")> _
    Shared Sub CheckAdministrator()
        Console.WriteLine("User is an administrator")

    End Sub
End Class

備註

Demand、 InheritanceDemand和 LinkDemand 是唯一對這個屬性具有意義的值 SecurityAction 。 其他動作不適用於非程式代碼訪問許可權的許可權。