FileDialogPermissionAttribute 构造函数
用指定的 SecurityAction 初始化 FileDialogPermissionAttribute 类的新实例。
**命名空间:**System.Security.Permissions
**程序集:**mscorlib（在 mscorlib.dll 中）
语法
声明
Public Sub New ( _
action As SecurityAction _
)
用法
Dim action As SecurityAction
Dim instance As New FileDialogPermissionAttribute(action)
public FileDialogPermissionAttribute (
SecurityAction action
)
public:
FileDialogPermissionAttribute (
SecurityAction action
)
public FileDialogPermissionAttribute (
SecurityAction action
)
public function FileDialogPermissionAttribute (
action : SecurityAction
)
参数
- action
SecurityAction 值之一。
示例
' This sample demonstrates the use of the FileDialogPermissionAttribute.
Imports System
Imports System.Reflection
Imports System.Security.Permissions
Imports System.Security
Imports System.IO
Imports Microsoft.VisualBasic
Class [MyClass]
Public Shared Sub FileDialogPermissionAttributeDemo()
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 'FileDialogPermissionAttributeDemo
' This method demonstrates PermitOnly with the Open property set to true.
<FileDialogPermissionAttribute(SecurityAction.PermitOnly, Open:=True)> _
Public Shared Sub PermitOnlyMethod()
Console.WriteLine("Executing PermitOnlyMethod.")
Console.WriteLine("PermitOnly the Open permission.")
PermitOnlyTest()
End Sub 'PermitOnlyMethod
Public Shared Sub PermitOnlyTest()
Console.WriteLine("Executing PermitOnlyTest.")
Try
Dim ps As New PermissionSet(PermissionState.None)
ps.AddPermission(New FileDialogPermission(FileDialogPermissionAccess.Open))
Console.WriteLine("Demanding permission to open a file.")
ps.Demand()
Console.WriteLine("Demand succeeded.")
ps.AddPermission(New FileDialogPermission(FileDialogPermissionAccess.Save))
Console.WriteLine("Demanding permission to save a file.")
' This demand should cause an exception.
ps.Demand()
' The TestFailed method is called if an exception is not thrown.
Catch e As Exception
Console.WriteLine(("An exception was thrown because of a save demand: " & e.Message))
End Try
End Sub 'PermitOnlyTest
' Set the Save property for a Deny action.
<FileDialogPermissionAttribute(SecurityAction.Deny, Save:=True)> _
Public Shared Sub DenyMethod()
Console.WriteLine("Executing DenyMethod.")
Console.WriteLine("Denying the Save permission.")
DenyTest()
End Sub 'DenyMethod
Public Shared Sub DenyTest()
Console.WriteLine("Executing DenyTest.")
Try
Dim ps As New PermissionSet(PermissionState.None)
ps.AddPermission(New FileDialogPermission(FileDialogPermissionAccess.Open))
Console.WriteLine("Demanding permission to open a file.")
ps.Demand()
Console.WriteLine("Demand succeeded.")
ps.AddPermission(New FileDialogPermission(FileDialogPermissionAccess.Save))
Console.WriteLine("Demanding permission to save a file.")
' 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 an open demand: " & e.Message))
End Try
End Sub 'DenyTest
' This method demonstrates the use of the FileDialogPermissionAttribute to deny all permissions.
<FileDialogPermissionAttribute(SecurityAction.Deny, Unrestricted:=True)> _
Public Shared Sub DenyAllMethod()
Console.WriteLine("Executing DenyAllMethod.")
Console.WriteLine("Denied all FileDialogPermissions ")
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 FileDialogPermission(FileDialogPermissionAccess.Open))
Console.WriteLine("Demanding permission to open a file.")
' 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 an open demand: " + e.Message))
End Try
End Sub 'DenyAllTestMethod
Public Shared Sub TestFailed()
Console.WriteLine("Executing TestFailed.")
Console.WriteLine("Throwing an exception.")
Throw New Exception()
End Sub 'TestFailed
Overloads Shared Sub Main(ByVal args() As String)
FileDialogPermissionAttributeDemo()
End Sub 'Main
End Class '[MyClass]
// This sample demonstrates the use of the FileDialogPermissionAttribute.
using System;
using System.Reflection;
using System.Security.Permissions;
using System.Security;
using System.IO;
class MyClass
{
public static void FileDialogPermissionAttributeDemo()
{
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 PermitOnly with the Open property set to true.
[FileDialogPermissionAttribute(SecurityAction.PermitOnly, Open = true)]
public static void PermitOnlyMethod()
{
Console.WriteLine("Executing PermitOnlyMethod.");
Console.WriteLine("PermitOnly the Open permission.");
PermitOnlyTest();
}
public static void PermitOnlyTest()
{
Console.WriteLine("Executing PermitOnlyTest.");
try
{
PermissionSet ps = new PermissionSet(PermissionState.None);
ps.AddPermission(
new FileDialogPermission(FileDialogPermissionAccess.Open));
Console.WriteLine("Demanding permission to open a file.");
ps.Demand();
Console.WriteLine("Demand succeeded.");
ps.AddPermission(
new FileDialogPermission(FileDialogPermissionAccess.Save));
Console.WriteLine("Demanding permission to save a file.");
// This demand should cause an exception.
ps.Demand();
// The TestFailed method is called if an exception is not thrown.
}
catch (Exception e)
{
Console.WriteLine("An exception was thrown because of a save demand: " + e.Message);
}
}
// Set the Save property for a Deny action.
[FileDialogPermissionAttribute(SecurityAction.Deny, Save = true)]
public static void DenyMethod()
{
Console.WriteLine("Executing DenyMethod.");
Console.WriteLine("Denying the Save permission.");
DenyTest();
}
public static void DenyTest()
{
Console.WriteLine("Executing DenyTest.");
try
{
PermissionSet ps = new PermissionSet(PermissionState.None);
ps.AddPermission(
new FileDialogPermission(FileDialogPermissionAccess.Open));
Console.WriteLine("Demanding permission to open a file.");
ps.Demand();
Console.WriteLine("Demand succeeded.");
ps.AddPermission(
new FileDialogPermission(FileDialogPermissionAccess.Save));
Console.WriteLine("Demanding permission to save a file.");
// 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 an open demand: " + e.Message);
}
}
// This method demonstrates the use of the FileDialogPermissionAttribute to deny all permissions.
[FileDialogPermissionAttribute(SecurityAction.Deny, Unrestricted = true)]
public static void DenyAllMethod()
{
Console.WriteLine("Executing DenyAllMethod.");
Console.WriteLine("Denied all FileDialogPermissions");
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 FileDialogPermission(FileDialogPermissionAccess.Open));
Console.WriteLine("Demanding permission to open a file.");
// 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 an open demand: " + e.Message);
}
}
public static void TestFailed()
{
Console.WriteLine("Executing TestFailed.");
Console.WriteLine("Throwing an exception.");
throw new Exception();
}
static void Main(string[] args)
{
FileDialogPermissionAttributeDemo();
}
}
// This sample demonstrates the use of the FileDialogPermissionAttribute.
using namespace System;
using namespace System::Security;
using namespace System::Security::Permissions;
using namespace System::Runtime::InteropServices;
using namespace System::Security;
using namespace System::IO;
void PermitOnlyTest()
{
Console::WriteLine( "Executing PermitOnlyTest." );
try
{
PermissionSet^ ps = gcnew PermissionSet( PermissionState::None );
ps->AddPermission( gcnew FileDialogPermission( FileDialogPermissionAccess::Open ) );
Console::WriteLine( "Demanding permission to open a file." );
ps->Demand();
Console::WriteLine( "Demand succeeded." );
ps->AddPermission( gcnew FileDialogPermission( FileDialogPermissionAccess::Save ) );
Console::WriteLine( "Demanding permission to save a file." );
// This demand should cause an exception.
ps->Demand();
// The TestFailed method is called if an exception is not thrown.
}
catch ( Exception^ e )
{
Console::WriteLine( "An exception was thrown because of a save demand: {0}", e->Message );
}
}
// This method demonstrates PermitOnly with the Open property set to true.
[FileDialogPermissionAttribute(SecurityAction::PermitOnly,Open=true)]
void PermitOnlyMethod()
{
Console::WriteLine( "Executing PermitOnlyMethod." );
Console::WriteLine( "PermitOnly the Open permission." );
PermitOnlyTest();
}
void TestFailed()
{
Console::WriteLine( "Executing TestFailed." );
Console::WriteLine( "Throwing an exception." );
throw gcnew Exception;
}
void DenyTest()
{
Console::WriteLine( "Executing DenyTest." );
try
{
PermissionSet^ ps = gcnew PermissionSet( PermissionState::None );
ps->AddPermission( gcnew FileDialogPermission( FileDialogPermissionAccess::Open ) );
Console::WriteLine( "Demanding permission to open a file." );
ps->Demand();
Console::WriteLine( "Demand succeeded." );
ps->AddPermission( gcnew FileDialogPermission( FileDialogPermissionAccess::Save ) );
Console::WriteLine( "Demanding permission to save a file." );
// 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 an open demand: {0}", e->Message );
}
}
// Set the Save property for a Deny action.
[FileDialogPermissionAttribute(SecurityAction::Deny,Save=true)]
void DenyMethod()
{
Console::WriteLine( "Executing DenyMethod." );
Console::WriteLine( "Denying the Save permission." );
DenyTest();
}
// This method tests to assure permissions have been denied.
void DenyAllTestMethod()
{
Console::WriteLine( "Executing DenyAllTestMethod." );
try
{
PermissionSet^ ps = gcnew PermissionSet( PermissionState::None );
ps->AddPermission( gcnew FileDialogPermission( FileDialogPermissionAccess::Open ) );
Console::WriteLine( "Demanding permission to open a file." );
// 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 an open demand: {0}", e->Message );
}
}
// This method demonstrates the use of the FileDialogPermissionAttribute to deny all permissions.
[FileDialogPermissionAttribute(SecurityAction::Deny,Unrestricted=true)]
void DenyAllMethod()
{
Console::WriteLine( "Executing DenyAllMethod." );
Console::WriteLine( "Denied all FileDialogPermissions" );
DenyAllTestMethod();
}
void FileDialogPermissionAttributeDemo()
{
try
{
PermitOnlyMethod();
}
catch ( Exception^ e )
{
Console::WriteLine( e->Message );
}
try
{
DenyMethod();
}
catch ( Exception^ e )
{
Console::WriteLine( e->Message );
}
try
{
DenyAllMethod();
}
catch ( Exception^ e )
{
Console::WriteLine( e->Message );
}
}
int main()
{
FileDialogPermissionAttributeDemo();
}
// This sample demonstrates the use of the FileDialogPermissionAttribute.
import System.*;
import System.Reflection.*;
import System.Security.Permissions.*;
import System.Security.*;
import System.IO.*;
class MyClass
{
public static void FileDialogPermissionAttributeDemo()
{
try {
PermitOnlyMethod();
}
catch (System.Exception e) {
Console.WriteLine(e.get_Message().toString());
}
try {
DenyMethod();
}
catch (System.Exception e) {
Console.WriteLine(e.get_Message().toString());
}
try {
DenyAllMethod();
}
catch (System.Exception e) {
Console.WriteLine(e.get_Message().toString());
}
} //FileDialogPermissionAttributeDemo
// This method demonstrates PermitOnly with the Open property set to true.
/** @attribute FileDialogPermissionAttribute(SecurityAction.PermitOnly,
Open = true)
*/
public static void PermitOnlyMethod()
{
Console.WriteLine("Executing PermitOnlyMethod.");
Console.WriteLine("PermitOnly the Open permission.");
PermitOnlyTest();
} //PermitOnlyMethod
public static void PermitOnlyTest()
{
Console.WriteLine("Executing PermitOnlyTest.");
try {
PermissionSet ps = new PermissionSet(PermissionState.None);
ps.AddPermission(new FileDialogPermission(
FileDialogPermissionAccess.Open));
Console.WriteLine("Demanding permission to open a file.");
ps.Demand();
Console.WriteLine("Demand succeeded.");
ps.AddPermission(new FileDialogPermission(
FileDialogPermissionAccess.Save));
Console.WriteLine("Demanding permission to save a file.");
// This demand should cause an exception.
ps.Demand();
} // The TestFailed method is called if an exception is not thrown.
catch (System.Exception e) {
Console.WriteLine(("An exception was thrown because "
+ "of a save demand: " + e.get_Message()));
}
} //PermitOnlyTest
// Set the Save property for a Deny action.
/** @attribute FileDialogPermissionAttribute(SecurityAction.Deny,
Save = true)
*/
public static void DenyMethod()
{
Console.WriteLine("Executing DenyMethod.");
Console.WriteLine("Denying the Save permission.");
DenyTest();
} //DenyMethod
public static void DenyTest()
{
Console.WriteLine("Executing DenyTest.");
try {
PermissionSet ps = new PermissionSet(PermissionState.None);
ps.AddPermission(new FileDialogPermission(
FileDialogPermissionAccess.Open));
Console.WriteLine("Demanding permission to open a file.");
ps.Demand();
Console.WriteLine("Demand succeeded.");
ps.AddPermission(new FileDialogPermission(
FileDialogPermissionAccess.Save));
Console.WriteLine("Demanding permission to save a file.");
// This demand should cause an exception.
ps.Demand();
// The TestFailed method is called if an exception is not thrown.
TestFailed();
}
catch (System.Exception e) {
Console.WriteLine(("An exception was thrown because "
+ "of an open demand: " + e.get_Message()));
}
} //DenyTest
// This method demonstrates the use of the FileDialogPermissionAttribute
//to deny all permissions.
/** @attribute FileDialogPermissionAttribute(SecurityAction.Deny,
Unrestricted = true)
*/
public static void DenyAllMethod()
{
Console.WriteLine("Executing DenyAllMethod.");
Console.WriteLine("Denied all FileDialogPermissions");
DenyAllTestMethod();
} //DenyAllMethod
// 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 FileDialogPermission(
FileDialogPermissionAccess.Open));
Console.WriteLine("Demanding permission to open a file.");
// This demand should cause an exception.
ps.Demand();
// The TestFailed method is called if the expected exception is
//not thrown.
TestFailed();
}
catch (System.Exception e) {
Console.WriteLine(("An exception was thrown because "
+ "of an open demand: " + e.get_Message()));
}
} //DenyAllTestMethod
public static void TestFailed() throws Exception
{
Console.WriteLine("Executing TestFailed.");
Console.WriteLine("Throwing an exception.");
throw new Exception();
} //TestFailed
public static void main(String[] args)
{
FileDialogPermissionAttributeDemo();
} //main
} //MyClass
平台
Windows 98、Windows 2000 SP4、Windows Millennium Edition、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
请参见
参考
FileDialogPermissionAttribute 类
FileDialogPermissionAttribute 成员
System.Security.Permissions 命名空间