EnvironmentPermissionAttribute コンストラクタ

2008-03-28

SecurityAction を指定して、 EnvironmentPermissionAttribute クラスの新しいインスタンスを初期化します。

Public Sub New( _
   ByVal action As SecurityAction _)
[C#]
public EnvironmentPermissionAttribute(
   SecurityActionaction);
[C++]
public: EnvironmentPermissionAttribute(
   SecurityActionaction);
[JScript]
public function EnvironmentPermissionAttribute(
   action : SecurityAction);

パラメータ

action
SecurityAction 値の 1 つ。

例外

例外の種類	条件
ArgumentException	action パラメータが、 SecurityAction の有効値ではありません。

使用例

 
' This sample demonstrates the use of the EnvironmentPermissionAttribute.
Imports System
Imports System.Reflection
Imports System.Security.Permissions
Imports System.Security
Imports System.IO
Imports Microsoft.VisualBasic



Class [MyClass]

    Public Shared Sub PermissionDemo()
        Try
            PermitOnlyMethod()
        Catch e As Exception
            Console.WriteLine(e.Message.ToString())
        End Try

        Try
            DenyMethod()
        Catch e As Exception
            Console.WriteLine(e.Message.ToString())
        End Try
        Try
            DenyAllMethod()
        Catch e As Exception
            Console.WriteLine(e.Message.ToString())
        End Try
    End Sub 'PermissionDemo


    ' This method demonstrates the use of the EnvironmentPermissionAttribute to create a PermitOnly permission.
    ' Set the Read property for a PermitOnly SecurityAction.
    ' Set the All property for a PermitOnly SecurityAction.
    ' Set the Read, All, and Write properties.
    <EnvironmentPermissionAttribute(SecurityAction.PermitOnly, Read:="COMPUTERNAME"), _
    EnvironmentPermissionAttribute(SecurityAction.PermitOnly, All:="USERNAME"), _
    EnvironmentPermissionAttribute(SecurityAction.PermitOnly, Write:="USERDOMAIN")> _
    Public Shared Sub PermitOnlyMethod()
        Console.WriteLine("Executing PermitOnlyMethod.")
        Console.WriteLine("PermitOnly the Read permission for COMPUTERNAME.")
        Console.WriteLine("PermitOnly the All permission for USERNAME.")
        Console.WriteLine("PermitOnly the Write permission for USERDOMAIN.")

        PermitOnlyTest()
    End Sub 'PermitOnlyMethod


    Public Shared Sub PermitOnlyTest()
        Console.WriteLine("Executing PermitOnlyTest.")
        Try
            Dim ps As New PermissionSet(PermissionState.None)
            ps.AddPermission(New EnvironmentPermission(EnvironmentPermissionAccess.Read, "USERNAME"))
            Console.WriteLine("Demanding permission to read USERNAME.")
            ps.Demand()
            Console.WriteLine("Demand succeeded.")
            ps.AddPermission(New EnvironmentPermission(EnvironmentPermissionAccess.Write, "COMPUTERNAME"))
            Console.WriteLine("Demanding permission to write COMPUTERNAME.")
            ' This demand should cause an exception.
            ps.Demand()
            ' The TestFailed method is called if an exception is not thrown.
            TestFailed()
        Catch e As Exception
            Console.WriteLine(("An exception was thrown because of a write demand: " & e.Message))
        End Try
    End Sub 'PermitOnlyTest



    ' This method demonstrates the use of the EnvironmentPermission attribute to deny a permission. 
    <EnvironmentPermissionAttribute(SecurityAction.Deny, Read:="USERNAME")> _
    Public Shared Sub DenyMethod()
        Console.WriteLine("Executing DenyMethod.")
        Console.WriteLine("Denying the Read permission for USERNAME.")

        DenyTestMethod()
    End Sub 'DenyMethod


    Public Shared Sub DenyTestMethod()
        Console.WriteLine("Executing DenyTestMethod.")
        Try
            Dim ps As New PermissionSet(PermissionState.None)
            ps.AddPermission(New EnvironmentPermission(EnvironmentPermissionAccess.Read, "COMPUTERNAME"))
            Console.WriteLine("Demanding permission to read COMPUTERNAME.")
            ps.Demand()
            Console.WriteLine("Demand succeeded.")
            ps.AddPermission(New EnvironmentPermission(EnvironmentPermissionAccess.Read, "USERNAME"))
            Console.WriteLine("Demanding permission to read USERNAME.")
            ' This demand should cause an exception.
            ps.Demand()
            ' The TestFailed method is called if an exception is not thrown.
            TestFailed()
        Catch e As Exception
            Console.WriteLine(("An exception was thrown because of a read demand: " & e.Message))
        End Try
    End Sub 'DenyTestMethod


    ' This method demonstrates the use of the EnvironmentPermissionAttribute to deny all permissions.
    <EnvironmentPermissionAttribute(SecurityAction.Deny, Unrestricted:=True)> _
    Public Shared Sub DenyAllMethod()
        Console.WriteLine("Executing DenyAllMethod.")
        Console.WriteLine("Denied all EnvironmentPermissions")

        DenyAllTestMethod()
    End Sub 'DenyAllMethod

    ' This method tests to assure permissions have been denied.
    Public Shared Sub DenyAllTestMethod()
        Console.WriteLine("Executing DenyAllTestMethod.")
        Try
            Dim ps As New PermissionSet(PermissionState.None)
            ps.AddPermission(New EnvironmentPermission(EnvironmentPermissionAccess.Read, "COMPUTERNAME"))
            Console.WriteLine("Demanding permission to read 'COMPUTERNAME'.")
            ' This demand should cause an exception.
            ps.Demand()
            ' The TestFailed method is called if the expected exception is not thrown.
            TestFailed()

        Catch e As Exception

            Console.WriteLine(("An exception was thrown because of a read demand: " + e.Message))
        End Try
    End Sub 'DenyAllTestMethod

    Public Shared Sub TestFailed()
        Console.WriteLine("Executing TestFailed method.")
        Console.WriteLine("Throwing an exception.")
        Throw New Exception()
    End Sub 'TestFailed

    Overloads Shared Sub Main(ByVal args() As String)
        PermissionDemo()
    End Sub 'Main
End Class '[MyClass] 

[C#] 
// This sample demonstrates the use of the EnvironmentPermissionAttribute.

using System;
using System.Reflection;
using System.Security.Permissions;
using System.Security;
using System.IO;

    class MyClass
    {
        public static void PermissionDemo()
        {  
            try
            {
                PermitOnlyMethod();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message.ToString());
            }

            try
            {
                DenyMethod();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message.ToString());
            }
            
            try
            {
                DenyAllMethod();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message.ToString());
            }
        }

        // This method demonstrates the use of the EnvironmentPermissionAttribute to create a PermitOnly permission.

        // Set the Read property for a PermitOnly SecurityAction.
        [EnvironmentPermissionAttribute(SecurityAction.PermitOnly, Read = "COMPUTERNAME")] 
        // Set the All property for a PermitOnly SecurityAction.
        [EnvironmentPermissionAttribute(SecurityAction.PermitOnly, All = "USERNAME")]
        // Set the Write property for a PermitOnly SecurityAction.
        [EnvironmentPermissionAttribute(SecurityAction.PermitOnly, Write = "USERDOMAIN")]
        public static void PermitOnlyMethod()
        {
            Console.WriteLine("Executing PermitOnlyMethod.");
            Console.WriteLine("PermitOnly the Read permission for COMPUTERNAME.");
            Console.WriteLine("PermitOnly the All permission for USERNAME.");
            Console.WriteLine("PermitOnly the Write permission for USERDOMAIN.");

            PermitOnlyTest();
        }
    
        public static void PermitOnlyTest()
        {
            Console.WriteLine("Executing PermitOnlyTest.");
            try
            {
                PermissionSet ps = new PermissionSet(PermissionState.None);
                ps.AddPermission(
                    new EnvironmentPermission(EnvironmentPermissionAccess.Read, "USERNAME"));
                Console.WriteLine("Demanding permission to read USERNAME.");
                ps.Demand();
                Console.WriteLine("Demand succeeded.");
                ps.AddPermission(
                    new EnvironmentPermission(EnvironmentPermissionAccess.Write, 
                    "COMPUTERNAME"));
                Console.WriteLine("Demanding permission to write COMPUTERNAME.");
                // This demand should cause an exception.
                ps.Demand();
                // The TestFailed method is called if an exception is not thrown.
                TestFailed();
            }
            catch (Exception e)
            {
                Console.WriteLine("An exception was thrown because of a write demand: " + e.Message);
            }
        }


// This method demonstrates the use of the EnvironmentPermission attribute to deny a permission. 
        [EnvironmentPermissionAttribute(SecurityAction.Deny, Read = "USERNAME")]
        public static void DenyMethod()
        {
            Console.WriteLine("Executing DenyMethod.");
            Console.WriteLine("Denying the Read permission for USERNAME.");

            DenyTestMethod();
        }

        public static void DenyTestMethod()
        {
            Console.WriteLine("Executing DenyTestMethod.");
            try
            {
                PermissionSet ps = new PermissionSet(PermissionState.None);
                ps.AddPermission(
                    new EnvironmentPermission(EnvironmentPermissionAccess.Read, "COMPUTERNAME"));
                Console.WriteLine("Demanding permission to read COMPUTERNAME.");
                ps.Demand();
                Console.WriteLine("Demand succeeded.");
                ps.AddPermission(
                    new EnvironmentPermission(EnvironmentPermissionAccess.Read, 
                    "USERNAME"));
                Console.WriteLine("Demanding permission to read USERNAME.");
                // This demand should cause an exception.
                ps.Demand();
                // The TestFailed method is called if an exception is not thrown.
                TestFailed();
            }
            catch (Exception e)
            {
                Console.WriteLine("An exception was thrown because of a read demand: " + e.Message);
            }
        }

        // This method demonstrates the use of the EnvironmentPermissionAttribute to deny all permissions.
        [EnvironmentPermissionAttribute(SecurityAction.Deny, Unrestricted = true)]
        public static void DenyAllMethod()
        {
            Console.WriteLine("Executing DenyAllMethod.");
            Console.WriteLine("Denied all EnvironmentPermissions");

            DenyAllTestMethod();
        }
        // This method tests to assure permissions have been denied.
        public static void DenyAllTestMethod()
        {
            Console.WriteLine("Executing DenyAllTestMethod.");
            try
            {
                PermissionSet ps = new PermissionSet(PermissionState.None);
                ps.AddPermission(
                new EnvironmentPermission(EnvironmentPermissionAccess.Read, "COMPUTERNAME"));
                Console.WriteLine("Demanding permission to read 'COMPUTERNAME'.");
                // This demand should cause an exception.
                ps.Demand();
                // The TestFailed method is called if the expected exception is not thrown.
                TestFailed();
            }

            catch (Exception e)

            {
                Console.WriteLine("An exception was thrown because of a read demand: " + e.Message);
            }
        }

        public static void TestFailed()
        {
            Console.WriteLine("Executing TestFailed method.");
            Console.WriteLine("Throwing an exception.");
            throw new Exception();
        }

        static void Main(string[] args)
        {
            PermissionDemo();
        }

    }

[C++] 
// This sample demonstrates the use of the EnvironmentPermissionAttribute.

#using <mscorlib.dll>

using namespace System;
using namespace System::Reflection;
using namespace System::Security::Permissions;
using namespace System::Security;
using namespace System::IO;


void TestFailed() {
    Console::WriteLine(S"Executing TestFailed method.");
    Console::WriteLine(S"Throwing an exception.");
    throw new Exception();
}

void PermitOnlyTest() {
    Console::WriteLine(S"Executing PermitOnlyTest.");
    try {
        PermissionSet* ps = new PermissionSet(PermissionState::None);
        ps->AddPermission(new EnvironmentPermission(EnvironmentPermissionAccess::Read, S"USERNAME"));
        Console::WriteLine(S"Demanding permission to read USERNAME.");
        ps->Demand();
        Console::WriteLine(S"Demand succeeded.");
        ps->AddPermission(new EnvironmentPermission(EnvironmentPermissionAccess::Write, 
            S"COMPUTERNAME"));
        Console::WriteLine(S"Demanding permission to write COMPUTERNAME.");
        // This demand should cause an exception.
        ps->Demand();
        // The TestFailed method is called if an exception is not thrown.
        TestFailed();
    } catch (Exception* e) {
        Console::WriteLine(S"An exception was thrown because of a write demand: {0}", e->Message);
    }
}

// This function demonstrates the use of the EnvironmentPermissionAttribute to create a PermitOnly permission.

// Set the Read property for a PermitOnly SecurityAction.
[EnvironmentPermissionAttribute(SecurityAction::PermitOnly, Read = S"COMPUTERNAME")] 
// Set the All property for a PermitOnly SecurityAction.
[EnvironmentPermissionAttribute(SecurityAction::PermitOnly, All = S"USERNAME")]
// Set the Write property for a PermitOnly SecurityAction.
[EnvironmentPermissionAttribute(SecurityAction::PermitOnly, Write = S"USERDOMAIN")]
void PermitOnlyMethod() {
    Console::WriteLine(S"Executing PermitOnlyMethod.");
    Console::WriteLine(S"PermitOnly the Read permission for COMPUTERNAME.");
    Console::WriteLine(S"PermitOnly the All permission for USERNAME.");
    Console::WriteLine(S"PermitOnly the Write permission for USERDOMAIN.");

    PermitOnlyTest();
}

void DenyTestMethod() {
    Console::WriteLine(S"Executing DenyTestMethod.");
    try {
        PermissionSet* ps = new PermissionSet(PermissionState::None);
        ps->AddPermission(new EnvironmentPermission(EnvironmentPermissionAccess::Read, S"COMPUTERNAME"));
        Console::WriteLine(S"Demanding permission to read COMPUTERNAME.");
        ps->Demand();
        Console::WriteLine(S"Demand succeeded.");
        ps->AddPermission(new EnvironmentPermission(EnvironmentPermissionAccess::Read, 
            S"USERNAME"));
        Console::WriteLine(S"Demanding permission to read USERNAME.");
        // This demand should cause an exception.
        ps->Demand();
        // The TestFailed method is called if an exception is not thrown.
        TestFailed();
    } catch (Exception* e) {
        Console::WriteLine(S"An exception was thrown because of a read demand: {0}", e->Message);
    }
}

// This method demonstrates the use of the EnvironmentPermission attribute to deny a permission. 
[EnvironmentPermissionAttribute(SecurityAction::Deny, Read = S"USERNAME")]
void DenyMethod() {
    Console::WriteLine(S"Executing DenyMethod.");
    Console::WriteLine(S"Denying the Read permission for USERNAME.");

    DenyTestMethod();
}

void PermissionDemo() {  
    try {
        PermitOnlyMethod();
    } catch (Exception* e) {
        Console::WriteLine(e->Message);
    }

    try {
        DenyMethod();
    } catch (Exception* e) {
        Console::WriteLine(e->Message);
    }

}


int main() {
    PermissionDemo();
}

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタボタンをクリックします。

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, Common Language Infrastructure (CLI) Standard

参照

EnvironmentPermissionAttribute クラス | EnvironmentPermissionAttribute メンバ | System.Security.Permissions 名前空間

次の方法で共有

EnvironmentPermissionAttribute コンストラクタ

パラメータ

例外

使用例

必要条件

参照

その他のリソース