ReflectionPermission 类
通过 System.Reflection API 控制对元数据的访问。无法继承此类。
**命名空间:**System.Security.Permissions
**程序集:**mscorlib（在 mscorlib.dll 中）
语法
声明
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public NotInheritable Class ReflectionPermission
Inherits CodeAccessPermission
Implements IUnrestrictedPermission
用法
Dim instance As ReflectionPermission
[SerializableAttribute]
[ComVisibleAttribute(true)]
public sealed class ReflectionPermission : CodeAccessPermission, IUnrestrictedPermission
[SerializableAttribute]
[ComVisibleAttribute(true)]
public ref class ReflectionPermission sealed : public CodeAccessPermission, IUnrestrictedPermission
/** @attribute SerializableAttribute() */
/** @attribute ComVisibleAttribute(true) */
public final class ReflectionPermission extends CodeAccessPermission implements IUnrestrictedPermission
SerializableAttribute
ComVisibleAttribute(true)
public final class ReflectionPermission extends CodeAccessPermission implements IUnrestrictedPermission
备注
Type 是 System.Reflection 功能的根。如果没有 ReflectionPermission，代码只能访问已加载程序集的 public 成员。这包括但不限于对 Object.GetType 的不受限制的访问、通过 Type.GetType 对 public 导出类型的访问以及对 GetTypeFromHandle 的访问。Type 的某些属性（例如 FullName 和 Attributes）可以在没有 ReflectionPermission 的情况下访问。
具有适当 ReflectionPermission 的代码可以访问任何已加载 Type 的 public、protected 甚至 private 成员。这包括对 Module、Assembly、BaseType 和 GetInterfaces 的访问。
警告
鉴于 ReflectionPermission 可以提供对私有类成员和元数据的访问，建议不要将 ReflectionPermission 授予 Internet 代码。
示例
Imports System
Imports System.Security
Imports System.Security.Permissions
Imports Microsoft.VisualBasic
<Assembly: CLSCompliant(True)>
Public Class ReflectionPermissionDemo
' IsSubsetOf determines whether the current permission is a subset of the specified permission.
Private Function IsSubsetOfDemo() As Boolean
Dim returnValue As Boolean = True
Dim reflection1, reflection2 As ReflectionPermissionFlag
Dim reflectionPerm1, reflectionPerm2 As ReflectionPermission
Dim reflectionGen1 As New ReflectionGenerator()
Dim reflectionGen2 As New ReflectionGenerator()
reflectionGen1.ResetIndex()
While reflectionGen1.CreateReflection(reflection1)
reflectionPerm1 = New ReflectionPermission(reflection1)
reflectionGen2.ResetIndex()
Console.WriteLine("********************************************************" & ControlChars.Lf)
While reflectionGen2.CreateReflection(reflection2)
reflectionPerm2 = New ReflectionPermission(reflection2)
Try
If reflectionPerm1.IsSubsetOf(reflectionPerm2) Then
Console.WriteLine((reflectionPerm1.Flags.ToString() & " is a subset of " _
& reflectionPerm2.Flags.ToString()))
Else
Console.WriteLine((reflectionPerm1.Flags.ToString() & " is not a subset of " _
& reflectionPerm2.Flags.ToString()))
End If
Catch e As Exception
Console.WriteLine(("An exception was thrown for subset :" & reflectionPerm1.ToString() _
& ControlChars.Lf & reflectionPerm2.ToString() & ControlChars.Lf & e.ToString()))
returnValue = False
End Try
ContinueWhile2:
End While
ContinueWhile1:
End While
Return returnValue
End Function 'IsSubsetOfDemo
' Union creates a new permission that is the union of the current permission and the specified permission.
Private Function UnionDemo() As Boolean
Dim returnValue As Boolean = True
Dim reflection1, reflection2 As ReflectionPermissionFlag
Dim reflectionPerm1, reflectionPerm2 As ReflectionPermission
Dim reflectionPerm3 As IPermission
Dim reflectionGen1 As New ReflectionGenerator()
Dim reflectionGen2 As New ReflectionGenerator()
reflectionGen1.ResetIndex()
While reflectionGen1.CreateReflection(reflection1)
reflectionPerm1 = New ReflectionPermission(reflection1)
Console.WriteLine("**********************************************************" & ControlChars.Lf)
reflectionGen2.ResetIndex()
While reflectionGen2.CreateReflection(reflection2)
reflectionPerm2 = New ReflectionPermission(reflection2)
reflectionPerm3 = CType(reflectionPerm1.Union(reflectionPerm2), ReflectionPermission)
reflectionPerm3 = reflectionPerm1.Union(reflectionPerm2)
If reflectionPerm3 Is Nothing Then
Console.WriteLine(("The union of " & reflection1.ToString() & " and " _
& reflection2.ToString() & " is null."))
Else
Console.WriteLine(("The union of " & reflectionPerm1.Flags.ToString() & " and " _
& reflectionPerm2.Flags.ToString() & " = " _
& CType(reflectionPerm3, ReflectionPermission).Flags.ToString()))
End If
ContinueWhile2:
End While
ContinueWhile1:
End While
Return returnValue
End Function 'UnionDemo
' Intersect creates and returns a new permission that is the intersection of the current
' permission and the permission specified.
Private Function IntersectDemo() As Boolean
Dim returnValue As Boolean = True
Dim reflection1, reflection2 As ReflectionPermissionFlag
Dim reflectionPerm1, reflectionPerm2, reflectionPerm3 As ReflectionPermission
Dim reflectionGen1 As New ReflectionGenerator()
Dim reflectionGen2 As New ReflectionGenerator()
reflectionGen1.ResetIndex()
While reflectionGen1.CreateReflection(reflection1)
reflectionPerm1 = New ReflectionPermission(reflection1)
Console.WriteLine("**********************************************************" & ControlChars.Lf)
reflectionGen2.ResetIndex()
While reflectionGen2.CreateReflection(reflection2)
reflectionPerm2 = New ReflectionPermission(reflection2)
reflectionPerm3 = CType(reflectionPerm1.Intersect(reflectionPerm2), ReflectionPermission)
If Not (reflectionPerm3 Is Nothing) Then
Console.WriteLine(("The intersection of " & reflection1.ToString() & " and " _
& reflection2.ToString() & " = " _
& CType(reflectionPerm3, ReflectionPermission).Flags.ToString()))
Else
Console.WriteLine(("The intersection of " & reflection1.ToString() & " and " _
& reflection2.ToString() & " is null."))
End If
ContinueWhile2:
End While
ContinueWhile1:
End While
Return returnValue
End Function 'IntersectDemo
'Copy creates and returns an identical copy of the current permission.
Private Function CopyDemo() As Boolean
Dim returnValue As Boolean = True
Dim reflection1 As ReflectionPermissionFlag
Dim reflectionPerm1, reflectionPerm2 As ReflectionPermission
Dim reflectionGen1 As New ReflectionGenerator()
Dim reflectionGen2 As New ReflectionGenerator()
reflectionGen1.ResetIndex()
While reflectionGen1.CreateReflection(reflection1)
reflectionPerm1 = New ReflectionPermission(reflection1)
reflectionGen2.ResetIndex()
Console.WriteLine("********************************************************" & ControlChars.Lf)
Try
reflectionPerm2 = CType(reflectionPerm1.Copy(), ReflectionPermission)
Console.WriteLine(("Result of copy = " & reflectionPerm2.ToString()))
Catch e As Exception
Console.WriteLine(("Copy failed :" & reflectionPerm1.ToString() & e.ToString()))
End Try
ContinueWhile1:
End While
Return returnValue
End Function 'CopyDemo
' ToXml creates an XML encoding of the permission and its current state;
' FromXml reconstructs a permission with the specified state from the XML encoding.
Private Function ToFromXmlDemo() As Boolean
Dim returnValue As Boolean = True
Dim reflection1 As ReflectionPermissionFlag
Dim reflectionPerm1, reflectionPerm2 As ReflectionPermission
Dim reflectionGen1 As New ReflectionGenerator()
Dim reflectionGen2 As New ReflectionGenerator()
reflectionGen1.ResetIndex()
While reflectionGen1.CreateReflection(reflection1)
reflectionPerm1 = New ReflectionPermission(reflection1)
Console.WriteLine("********************************************************" & ControlChars.Lf)
reflectionGen2.ResetIndex()
Try
reflectionPerm2 = New ReflectionPermission(PermissionState.None)
reflectionPerm2.FromXml(reflectionPerm1.ToXml())
Console.WriteLine(("Result of ToFromXml = " & reflectionPerm2.ToString()))
Catch e As Exception
Console.WriteLine(("ToFromXml failed :" & reflectionPerm1.ToString() & e.ToString()))
End Try
ContinueWhile1:
End While
Return returnValue
End Function 'ToFromXmlDemo
' Invoke all demos.
Public Function runDemo() As Boolean
Dim returnCode As Boolean = True
Dim tempReturnCode As Boolean
' Call the IsSubsetOf demo.
tempReturnCode = IsSubsetOfDemo()
If tempReturnCode Then
Console.Out.WriteLine("IsSubsetOf demo completed successfully.")
Else
Console.Out.WriteLine("IsSubsetOf demo failed.")
End If
returnCode = tempReturnCode AndAlso returnCode
' Call the Union demo.
tempReturnCode = UnionDemo()
If tempReturnCode Then
Console.Out.WriteLine("Union demo completed successfully.")
Else
Console.Out.WriteLine("Union demo failed.")
End If
returnCode = tempReturnCode AndAlso returnCode
' Call the Intersect demo.
tempReturnCode = IntersectDemo()
If tempReturnCode Then
Console.Out.WriteLine("Intersect demo completed successfully.")
Else
Console.Out.WriteLine("Intersect demo failed.")
End If
returnCode = tempReturnCode AndAlso returnCode
' Call the Copy demo.
tempReturnCode = CopyDemo()
If tempReturnCode Then
Console.Out.WriteLine("Copy demo completed successfully.")
Else
Console.Out.WriteLine("Copy demo failed.")
End If
returnCode = tempReturnCode AndAlso returnCode
' Call the ToFromXml demo.
tempReturnCode = ToFromXmlDemo()
If tempReturnCode Then
Console.Out.WriteLine("ToFromXml demo completed successfully.")
Else
Console.Out.WriteLine("ToFromXml demo failed.")
End If
returnCode = tempReturnCode AndAlso returnCode
Return returnCode
End Function 'runDemo
' Test harness.
Public Overloads Shared Sub Main(ByVal args() As [String])
Try
Dim democase As New ReflectionPermissionDemo()
Dim returnCode As Boolean = democase.runDemo()
If returnCode Then
Console.Out.WriteLine("ReflectionPermission demo completed successfully.")
Console.Out.WriteLine("Press the Enter key to exit.")
Dim consoleInput As String = Console.ReadLine()
System.Environment.ExitCode = 100
Else
Console.Out.WriteLine("ReflectionPermission demo failed.")
Console.Out.WriteLine("Press the Enter key to exit.")
Dim consoleInput As String = Console.ReadLine()
System.Environment.ExitCode = 101
End If
Catch e As Exception
Console.Out.WriteLine("ReflectionPermission demo failed.")
Console.WriteLine(e.ToString())
Console.Out.WriteLine("Press the Enter key to exit.")
Dim consoleInput As String = Console.ReadLine()
System.Environment.ExitCode = 101
End Try
End Sub 'Main
End Class 'ReflectionPermissionDemo
' This class generates ReflectionPermission objects.
Friend Class ReflectionGenerator
Private myReflection As ReflectionPermissionFlag() = {ReflectionPermissionFlag.AllFlags, ReflectionPermissionFlag.MemberAccess, ReflectionPermissionFlag.NoFlags, ReflectionPermissionFlag.ReflectionEmit, ReflectionPermissionFlag.TypeInformation}
Private reflectionIndex As Integer = 0
Public Sub New()
ResetIndex()
End Sub 'New
Public Sub ResetIndex()
reflectionIndex = 0
End Sub 'ResetIndex
' CreateReflection creates a ReflectionPermission object.
Public Function CreateReflection(ByRef reflection As ReflectionPermissionFlag) As Boolean
If reflectionIndex >= myReflection.Length Then
reflection = ReflectionPermissionFlag.NoFlags
reflectionIndex &= 1
Return False
End If
reflection = myReflection(reflectionIndex)
reflectionIndex = reflectionIndex + 1
Return True
End Function
End Class
using System;
using System.Security;
using System.Security.Permissions;
[assembly: CLSCompliant(true)]
public class ReflectionPermissionDemo
{
// IsSubsetOf determines whether the current permission is a subset of the specified permission.
private bool IsSubsetOfDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1, reflection2;
ReflectionPermission reflectionPerm1, reflectionPerm2;
ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
ReflectionGenerator reflectionGen2 = new ReflectionGenerator();
reflectionGen1.ResetIndex();
while (reflectionGen1.CreateReflection(out reflection1))
{
reflectionPerm1 = new ReflectionPermission(reflection1);
reflectionGen2.ResetIndex();
Console.WriteLine("********************************************************\n");
while (reflectionGen2.CreateReflection(out reflection2))
{
reflectionPerm2 = new ReflectionPermission(reflection2);
try
{
if (reflectionPerm1.IsSubsetOf(reflectionPerm2))
{
Console.WriteLine(reflectionPerm1.Flags + " is a subset of " +
reflectionPerm2.Flags);
}
else
{
Console.WriteLine(reflectionPerm1.Flags + " is not a subset of " +
reflectionPerm2.Flags);
}
}
catch (Exception e)
{
Console.WriteLine("An exception was thrown for subset :" + reflectionPerm1 + "\n" +
reflectionPerm2 + "\n" + e);
returnValue = false;
}
}
}
return returnValue;
}
// Union creates a new permission that is the union of the current permission and the specified permission.
private bool UnionDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1, reflection2;
ReflectionPermission reflectionPerm1, reflectionPerm2;
IPermission reflectionPerm3;
ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
ReflectionGenerator reflectionGen2 = new ReflectionGenerator();
reflectionGen1.ResetIndex();
while (reflectionGen1.CreateReflection(out reflection1))
{
reflectionPerm1 = new ReflectionPermission(reflection1);
Console.WriteLine("**********************************************************\n");
reflectionGen2.ResetIndex();
while (reflectionGen2.CreateReflection(out reflection2))
{
reflectionPerm2 = new ReflectionPermission(reflection2);
reflectionPerm3 = (ReflectionPermission)reflectionPerm1.Union(reflectionPerm2);
reflectionPerm3 = reflectionPerm1.Union(reflectionPerm2);
if (reflectionPerm3 == null)
{
Console.WriteLine("The union of " + reflection1 + " and " + reflection2 + " is null.");
}
else
{
Console.WriteLine("The union of " + reflectionPerm1.Flags + " and " +
reflectionPerm2.Flags + " = " +
((ReflectionPermission)reflectionPerm3).Flags.ToString());
}
}
}
return returnValue;
}
// Intersect creates and returns a new permission that is the intersection of the current
// permission and the permission specified.
private bool IntersectDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1, reflection2;
ReflectionPermission reflectionPerm1, reflectionPerm2, reflectionPerm3;
ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
ReflectionGenerator reflectionGen2 = new ReflectionGenerator();
reflectionGen1.ResetIndex();
while (reflectionGen1.CreateReflection(out reflection1))
{
reflectionPerm1 = new ReflectionPermission(reflection1);
Console.WriteLine("**********************************************************\n");
reflectionGen2.ResetIndex();
while (reflectionGen2.CreateReflection(out reflection2))
{
reflectionPerm2 = new ReflectionPermission(reflection2);
reflectionPerm3 = (ReflectionPermission)reflectionPerm1.Intersect(reflectionPerm2);
if (reflectionPerm3 != null)
{
Console.WriteLine("The intersection of " + reflection1 + " and " + reflection2 + " = " +
((ReflectionPermission)reflectionPerm3).Flags.ToString());
}
else
{
Console.WriteLine("The intersection of " + reflection1 + " and " + reflection2 + " is null.");
}
}
}
return returnValue;
}
//Copy creates and returns an identical copy of the current permission.
private bool CopyDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1;
ReflectionPermission reflectionPerm1, reflectionPerm2;
ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
ReflectionGenerator reflectionGen2 = new ReflectionGenerator();
reflectionGen1.ResetIndex();
while (reflectionGen1.CreateReflection(out reflection1))
{
reflectionPerm1 = new ReflectionPermission(reflection1);
reflectionGen2.ResetIndex();
Console.WriteLine("********************************************************\n");
try
{
reflectionPerm2 = (ReflectionPermission)reflectionPerm1.Copy();
Console.WriteLine("Result of copy = " + reflectionPerm2.ToString());
}
catch (Exception e)
{
Console.WriteLine("Copy failed :" + reflectionPerm1.ToString() + e);
continue;
}
}
return returnValue;
}
// ToXml creates an XML encoding of the permission and its current state;
// FromXml reconstructs a permission with the specified state from the XML encoding.
private bool ToFromXmlDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1;
ReflectionPermission reflectionPerm1, reflectionPerm2;
ReflectionGenerator reflectionGen1 = new ReflectionGenerator();
ReflectionGenerator reflectionGen2 = new ReflectionGenerator();
reflectionGen1.ResetIndex();
while (reflectionGen1.CreateReflection(out reflection1))
{
reflectionPerm1 = new ReflectionPermission(reflection1);
Console.WriteLine("********************************************************\n");
reflectionGen2.ResetIndex();
try
{
reflectionPerm2 = new ReflectionPermission(PermissionState.None);
reflectionPerm2.FromXml(reflectionPerm1.ToXml());
Console.WriteLine("Result of ToFromXml = " +
reflectionPerm2.ToString());
}
catch (Exception e)
{
Console.WriteLine("ToFromXml failed :" + reflectionPerm1.ToString() + e);
continue;
}
}
return returnValue;
}
// Invoke all demos.
public bool runDemo()
{
bool returnCode = true;
bool tempReturnCode;
// Call the IsSubsetOf demo.
if (tempReturnCode = IsSubsetOfDemo()) Console.Out.WriteLine("IsSubsetOf demo completed successfully.");
else Console.Out.WriteLine("IsSubsetOf demo failed.");
returnCode = tempReturnCode && returnCode;
// Call the Union demo.
if (tempReturnCode = UnionDemo()) Console.Out.WriteLine("Union demo completed successfully.");
else Console.Out.WriteLine("Union demo failed.");
returnCode = tempReturnCode && returnCode;
// Call the Intersect demo.
if (tempReturnCode = IntersectDemo()) Console.Out.WriteLine("Intersect demo completed successfully.");
else Console.Out.WriteLine("Intersect demo failed.");
returnCode = tempReturnCode && returnCode;
// Call the Copy demo.
if (tempReturnCode = CopyDemo()) Console.Out.WriteLine("Copy demo completed successfully.");
else Console.Out.WriteLine("Copy demo failed.");
returnCode = tempReturnCode && returnCode;
// Call the ToFromXml demo.
if (tempReturnCode = ToFromXmlDemo()) Console.Out.WriteLine("ToFromXml demo completed successfully.");
else Console.Out.WriteLine("ToFromXml demo failed.");
returnCode = tempReturnCode && returnCode;
return (returnCode);
}
// Test harness.
public static void Main(String[] args)
{
try
{
ReflectionPermissionDemo democase = new ReflectionPermissionDemo();
bool returnCode = democase.runDemo();
if (returnCode)
{
Console.Out.WriteLine("ReflectionPermission demo completed successfully.");
Console.Out.WriteLine("Press the Enter key to exit.");
string consoleInput = Console.ReadLine();
System.Environment.ExitCode = 100;
}
else
{
Console.Out.WriteLine("ReflectionPermission demo failed.");
Console.Out.WriteLine("Press the Enter key to exit.");
string consoleInput = Console.ReadLine();
System.Environment.ExitCode = 101;
}
}
catch (Exception e)
{
Console.Out.WriteLine("ReflectionPermission demo failed.");
Console.WriteLine(e.ToString());
Console.Out.WriteLine("Press the Enter key to exit.");
string consoleInput = Console.ReadLine();
System.Environment.ExitCode = 101;
}
}
}
// This class generates ReflectionPermission objects.
internal class ReflectionGenerator
{
private ReflectionPermissionFlag[] myReflection =
{
ReflectionPermissionFlag.AllFlags,
ReflectionPermissionFlag.MemberAccess,
ReflectionPermissionFlag.NoFlags,
ReflectionPermissionFlag.ReflectionEmit,
ReflectionPermissionFlag.TypeInformation};
private int reflectionIndex = 0;
public ReflectionGenerator()
{
ResetIndex();
}
public void ResetIndex()
{
reflectionIndex = 0;
}
// CreateReflection creates a ReflectionPermission object.
public bool CreateReflection(out ReflectionPermissionFlag reflection)
{
if (reflectionIndex >= myReflection.Length)
{
reflection = ReflectionPermissionFlag.NoFlags;
reflectionIndex++;
return false;
}
reflection = myReflection[reflectionIndex++];
return true;
}
}
using namespace System;
using namespace System::Security;
using namespace System::Security::Permissions;
using namespace System::Runtime::InteropServices;
// This class generates ReflectionPermission objects.
[assembly:CLSCompliant(true)];
private ref class ReflectionGenerator
{
private:
array<ReflectionPermissionFlag>^myReflection;
int reflectionIndex;
public:
ReflectionGenerator()
{
array<ReflectionPermissionFlag>^ temp0 = {ReflectionPermissionFlag::AllFlags,ReflectionPermissionFlag::MemberAccess,ReflectionPermissionFlag::NoFlags,ReflectionPermissionFlag::ReflectionEmit,ReflectionPermissionFlag::TypeInformation};
myReflection = temp0;
ResetIndex();
}
void ResetIndex()
{
reflectionIndex = 0;
}
// CreateReflection creates a ReflectionPermission object.
bool CreateReflection( [Out]ReflectionPermissionFlag * reflection )
{
if ( reflectionIndex >= myReflection->Length )
{
*reflection = ReflectionPermissionFlag::NoFlags;
reflectionIndex++;
return false;
}
*reflection = myReflection[ reflectionIndex++ ];
return true;
}
};
// End of ReflectionGenerator.
public ref class ReflectionPermissionDemo
{
private:
// IsSubsetOf determines whether the current permission is a subset of the specified permission.
bool IsSubsetOfDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1;
ReflectionPermissionFlag reflection2;
ReflectionPermission^ reflectionPerm1;
ReflectionPermission^ reflectionPerm2;
ReflectionGenerator^ reflectionGen1 = gcnew ReflectionGenerator;
ReflectionGenerator^ reflectionGen2 = gcnew ReflectionGenerator;
reflectionGen1->ResetIndex();
while ( reflectionGen1->CreateReflection( &reflection1 ) )
{
reflectionPerm1 = gcnew ReflectionPermission( reflection1 );
reflectionGen2->ResetIndex();
Console::WriteLine( "********************************************************\n" );
while ( reflectionGen2->CreateReflection( &reflection2 ) )
{
reflectionPerm2 = gcnew ReflectionPermission( reflection2 );
try
{
if ( reflectionPerm1->IsSubsetOf( reflectionPerm2 ) )
{
Console::WriteLine( "{0} is a subset of {1}", reflectionPerm1->Flags, reflectionPerm2->Flags );
}
else
{
Console::WriteLine( "{0} is not a subset of {1}", reflectionPerm1->Flags, reflectionPerm2->Flags );
}
}
catch ( Exception^ e )
{
Console::WriteLine( "An exception was thrown for subset : {0}\n{1}\n{2}", reflectionPerm1, reflectionPerm2, e );
returnValue = false;
}
}
}
return returnValue;
}
// Union creates a new permission that is the union of the current permission and the specified permission.
bool UnionDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1;
ReflectionPermissionFlag reflection2;
ReflectionPermission^ reflectionPerm1;
ReflectionPermission^ reflectionPerm2;
IPermission^ reflectionPerm3;
ReflectionGenerator^ reflectionGen1 = gcnew ReflectionGenerator;
ReflectionGenerator^ reflectionGen2 = gcnew ReflectionGenerator;
reflectionGen1->ResetIndex();
while ( reflectionGen1->CreateReflection( &reflection1 ) )
{
reflectionPerm1 = gcnew ReflectionPermission( reflection1 );
Console::WriteLine( "**********************************************************\n" );
reflectionGen2->ResetIndex();
while ( reflectionGen2->CreateReflection( &reflection2 ) )
{
reflectionPerm2 = gcnew ReflectionPermission( reflection2 );
reflectionPerm3 = dynamic_cast<ReflectionPermission^>(reflectionPerm1->Union( reflectionPerm2 ));
reflectionPerm3 = reflectionPerm1->Union( reflectionPerm2 );
if ( reflectionPerm3 == nullptr )
{
Console::WriteLine( "The union of {0} and {1} is null.", reflection1, reflection2 );
}
else
{
Console::WriteLine( "The union of {0} and {1} = {2}", reflectionPerm1->Flags, reflectionPerm2->Flags, (dynamic_cast<ReflectionPermission^>(reflectionPerm3))->Flags );
}
}
}
return returnValue;
}
// Intersect creates and returns a new permission that is the intersection of the current
// permission and the permission specified.
bool IntersectDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1;
ReflectionPermissionFlag reflection2;
ReflectionPermission^ reflectionPerm1;
ReflectionPermission^ reflectionPerm2;
ReflectionPermission^ reflectionPerm3;
ReflectionGenerator^ reflectionGen1 = gcnew ReflectionGenerator;
ReflectionGenerator^ reflectionGen2 = gcnew ReflectionGenerator;
reflectionGen1->ResetIndex();
while ( reflectionGen1->CreateReflection( &reflection1 ) )
{
reflectionPerm1 = gcnew ReflectionPermission( reflection1 );
Console::WriteLine( "**********************************************************\n" );
reflectionGen2->ResetIndex();
while ( reflectionGen2->CreateReflection( &reflection2 ) )
{
reflectionPerm2 = gcnew ReflectionPermission( reflection2 );
reflectionPerm3 = dynamic_cast<ReflectionPermission^>(reflectionPerm1->Intersect( reflectionPerm2 ));
if ( reflectionPerm3 != nullptr )
{
Console::WriteLine( "The intersection of {0} and {1} = {2}", reflection1, reflection2, (dynamic_cast<ReflectionPermission^>(reflectionPerm3))->Flags );
}
else
{
Console::WriteLine( "The intersection of {0} and {1} is null", reflection1, reflection2 );
}
}
}
return returnValue;
}
//Copy creates and returns an identical copy of the current permission.
bool CopyDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1;
ReflectionPermission^ reflectionPerm1;
ReflectionPermission^ reflectionPerm2;
ReflectionGenerator^ reflectionGen1 = gcnew ReflectionGenerator;
ReflectionGenerator^ reflectionGen2 = gcnew ReflectionGenerator;
reflectionGen1->ResetIndex();
while ( reflectionGen1->CreateReflection( &reflection1 ) )
{
reflectionPerm1 = gcnew ReflectionPermission( reflection1 );
reflectionGen2->ResetIndex();
Console::WriteLine( "********************************************************\n" );
try
{
reflectionPerm2 = dynamic_cast<ReflectionPermission^>(reflectionPerm1->Copy());
Console::WriteLine( "Result of copy = {0}", reflectionPerm2 );
}
catch ( Exception^ e )
{
Console::WriteLine( "Copy failed : {0}{1}", reflectionPerm1, e );
continue;
}
}
return returnValue;
}
// ToXml creates an XML encoding of the permission and its current state;
// FromXml reconstructs a permission with the specified state from the XML encoding.
bool ToFromXmlDemo()
{
bool returnValue = true;
ReflectionPermissionFlag reflection1;
ReflectionPermission^ reflectionPerm1;
ReflectionPermission^ reflectionPerm2;
ReflectionGenerator^ reflectionGen1 = gcnew ReflectionGenerator;
ReflectionGenerator^ reflectionGen2 = gcnew ReflectionGenerator;
reflectionGen1->ResetIndex();
while ( reflectionGen1->CreateReflection( &reflection1 ) )
{
reflectionPerm1 = gcnew ReflectionPermission( reflection1 );
Console::WriteLine( "********************************************************\n" );
reflectionGen2->ResetIndex();
try
{
reflectionPerm2 = gcnew ReflectionPermission( PermissionState::None );
reflectionPerm2->FromXml( reflectionPerm1->ToXml() );
Console::WriteLine( "Result of ToFromXml = {0}", reflectionPerm2 );
}
catch ( Exception^ e )
{
Console::WriteLine( "ToFromXml failed : {0}{1}", reflectionPerm1, e );
continue;
}
}
return returnValue;
}
public:
// Invoke all demos.
bool runDemo()
{
bool returnCode = true;
bool tempReturnCode;
// Call the IsSubsetOf demo.
if ( tempReturnCode = IsSubsetOfDemo() )
Console::WriteLine( "IsSubsetOf demo completed successfully." );
else
Console::WriteLine( "IsSubsetOf demo failed." );
returnCode = tempReturnCode && returnCode;
// Call the Union demo.
if ( tempReturnCode = UnionDemo() )
Console::WriteLine( "Union demo completed successfully." );
else
Console::WriteLine( "Union demo failed." );
returnCode = tempReturnCode && returnCode;
// Call the Intersect demo.
if ( tempReturnCode = IntersectDemo() )
Console::WriteLine( "Intersect demo completed successfully." );
else
Console::WriteLine( "Intersect demo failed." );
returnCode = tempReturnCode && returnCode;
// Call the Copy demo.
if ( tempReturnCode = CopyDemo() )
Console::WriteLine( "Copy demo completed successfully." );
else
Console::WriteLine( "Copy demo failed." );
returnCode = tempReturnCode && returnCode;
// Call the ToFromXml demo.
if ( tempReturnCode = ToFromXmlDemo() )
Console::WriteLine( "ToFromXml demo completed successfully." );
else
Console::WriteLine( "ToFromXml demo failed." );
returnCode = tempReturnCode && returnCode;
return (returnCode);
}
};
// Test harness.
int main()
{
try
{
ReflectionPermissionDemo^ democase = gcnew ReflectionPermissionDemo;
bool returnCode = democase->runDemo();
if ( returnCode )
{
Console::WriteLine( "ReflectionPermission demo completed successfully." );
Console::WriteLine( "Press the Enter key to exit." );
Console::ReadLine();
System::Environment::ExitCode = 100;
}
else
{
Console::WriteLine( "ReflectionPermission demo failed." );
Console::WriteLine( "Press the Enter key to exit." );
Console::ReadLine();
System::Environment::ExitCode = 101;
}
}
catch ( Exception^ e )
{
Console::WriteLine( "ReflectionPermission demo failed." );
Console::WriteLine( e );
Console::WriteLine( "Press the Enter key to exit." );
Console::ReadLine();
System::Environment::ExitCode = 101;
}
}
import System.*;
import System.Security.*;
import System.Security.Permissions.*;
/** @assembly CLSCompliant(true)
*/
public class ReflectionPermissionDemo
{
// IsSubsetOf determines whether the current permission is a
// subset of the specified permission.
private boolean IsSubsetOfDemo()
{
boolean returnValue = true;
ReflectionPermissionFlag reflection1[] =
new ReflectionPermissionFlag[1] ;
ReflectionPermissionFlag reflection2[] =
new ReflectionPermissionFlag[1] ;
ReflectionPermission reflectionPerm1[] =
new ReflectionPermission[1] ;
ReflectionPermission reflectionPerm2[] =
new ReflectionPermission[1];
ReflectionGenerator reflectionGen1 =
new ReflectionGenerator();
ReflectionGenerator reflectionGen2 =
new ReflectionGenerator();
reflectionGen1.ResetIndex();
while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
if (reflectionPerm1[0] == null) {
continue ;
}
reflectionGen2.ResetIndex();
Console.WriteLine("***************************************"
+ "*****************\n");
while(reflectionGen2.CreateReflection(
reflectionPerm2, reflection2)) {
if (reflectionPerm2[0] == null) {
continue ;
}
try {
if ( reflectionPerm1[0].IsSubsetOf(reflectionPerm2[0])) {
Console.WriteLine((reflectionPerm1[0].get_Flags()
+ " is a subset of " +
reflectionPerm2[0].get_Flags()));
}
else {
Console.WriteLine((reflectionPerm1[0].get_Flags()
+ " is not a subset of "
+ reflectionPerm2[0].get_Flags()));
}
}
catch(System.Exception e) {
Console.WriteLine(("An exception was "
+ "thrown for subset :" + reflectionPerm1[0] + "\n"
+ reflectionPerm2[0] + "\n" + e));
returnValue = false;
}
}
}
return returnValue ;
} //IsSubsetOfDemo
// Union creates a new permission that is the union of the
// current permission and the specified permission.
private boolean UnionDemo()
{
boolean returnValue = true;
ReflectionPermissionFlag reflection1[] =
new ReflectionPermissionFlag[1];
ReflectionPermissionFlag reflection2[] =
new ReflectionPermissionFlag[1];
ReflectionPermission reflectionPerm1[] =
new ReflectionPermission[1];
ReflectionPermission reflectionPerm2[] =
new ReflectionPermission[1];
IPermission reflectionPerm3;
ReflectionGenerator reflectionGen1 =
new ReflectionGenerator();
ReflectionGenerator reflectionGen2 =
new ReflectionGenerator();
reflectionGen1.ResetIndex();
while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
if (reflectionPerm1[0] == null) {
continue ;
}
Console.WriteLine("*******************************************"
+ "***************\n");
reflectionGen2.ResetIndex();
while(reflectionGen2.CreateReflection(reflectionPerm2,
reflection2)) {
if (reflectionPerm2[0] == null) {
continue ;
}
reflectionPerm3 =((ReflectionPermission)(
reflectionPerm1[0].Union(reflectionPerm2[0])));
reflectionPerm3 = reflectionPerm1[0].Union(reflectionPerm2[0]);
if (reflectionPerm3 == null) {
Console.WriteLine(("The union of " + reflection1[0]
+ " and " + reflection2[0] + " is null."));
}
else {
Console.WriteLine(("The union of "
+ reflectionPerm1[0].get_Flags() + " and "
+ reflectionPerm2[0].get_Flags() + " = "
+ ((ReflectionPermission)(reflectionPerm3)).
get_Flags().ToString()));
}
}
}
return returnValue ;
} //UnionDemo
// Intersect creates and returns a new permission that is the
// intersection of the current permission and the permission specified.
private boolean IntersectDemo()
{
boolean returnValue = true;
ReflectionPermissionFlag reflection1[] =
new ReflectionPermissionFlag[1];
ReflectionPermissionFlag reflection2[] =
new ReflectionPermissionFlag[1];
ReflectionPermission reflectionPerm1[] =
new ReflectionPermission[1];
ReflectionPermission reflectionPerm2[] =
new ReflectionPermission[1];
ReflectionPermission reflectionPerm3;
ReflectionGenerator reflectionGen1 =
new ReflectionGenerator();
ReflectionGenerator reflectionGen2 =
new ReflectionGenerator();
reflectionGen1.ResetIndex();
while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
if (reflectionPerm1[0] == null) {
continue ;
}
Console.WriteLine("***************************************"
+ "*******************\n");
reflectionGen2.ResetIndex();
while(reflectionGen2.CreateReflection(reflectionPerm2,
reflection2)) {
if (reflectionPerm2[0] == null) {
continue ;
}
reflectionPerm3 =((ReflectionPermission)(
reflectionPerm1[0].Intersect(reflectionPerm2[0])));
if (reflectionPerm3 != null) {
Console.WriteLine(("The intersection of "
+ reflection1[0] + " and "
+ reflection2[0] + " = "
+ ((ReflectionPermission)(reflectionPerm3)).
get_Flags().ToString()));
}
else {
Console.WriteLine(("The intersection of "
+ reflection1[0] + " and " + reflection2[0]
+ " is null."));
}
}
}
return returnValue ;
} //IntersectDemo
//Copy creates and returns an identical copy of the current permission.
private boolean CopyDemo()
{
boolean returnValue = true;
ReflectionPermissionFlag reflection1[] =
new ReflectionPermissionFlag[1];
ReflectionPermission reflectionPerm1[] =
new ReflectionPermission[1];
ReflectionPermission reflectionPerm2[] =
new ReflectionPermission[1];
ReflectionGenerator reflectionGen1 =
new ReflectionGenerator();
ReflectionGenerator reflectionGen2 =
new ReflectionGenerator();
reflectionGen1.ResetIndex();
while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
if (reflectionPerm1[0] == null) {
continue ;
}
reflectionGen2.ResetIndex();
Console.WriteLine("*********************************"
+ "***********************\n");
try {
reflectionPerm2[0] =((ReflectionPermission)(
reflectionPerm1[0].Copy()));
Console.WriteLine(("Result of copy = "
+ reflectionPerm2[0].ToString()));
}
catch(System.Exception e){
Console.WriteLine(("Copy failed :"
+ reflectionPerm1[0].ToString() + e));
continue ;
}
}
return returnValue ;
} //CopyDemo
// ToXml creates an XML encoding of the permission and its current state;
// FromXml reconstructs a permission with the specified state from the
// XML encoding.
private boolean ToFromXmlDemo()
{
boolean returnValue = true;
ReflectionPermissionFlag reflection1[] =
new ReflectionPermissionFlag[1];
ReflectionPermission reflectionPerm1[] =
new ReflectionPermission[1];
ReflectionPermission reflectionPerm2[] =
new ReflectionPermission[1];
ReflectionGenerator reflectionGen1 =
new ReflectionGenerator();
ReflectionGenerator reflectionGen2 =
new ReflectionGenerator();
reflectionGen1.ResetIndex();
while(reflectionGen1.CreateReflection(reflectionPerm1, reflection1)) {
if (reflectionPerm1[0] == null) {
continue ;
}
Console.WriteLine("**************************************"
+ "******************\n");
reflectionGen2.ResetIndex();
try {
reflectionPerm2[0] =
new ReflectionPermission(PermissionState.None);
reflectionPerm2[0].FromXml(reflectionPerm1[0].ToXml());
Console.WriteLine(("Result of ToFromXml = "
+ reflectionPerm2[0].ToString()));
}
catch(System.Exception e) {
Console.WriteLine(("ToFromXml failed :"
+ reflectionPerm1[0].ToString() + e));
continue ;
}
}
return returnValue ;
} //ToFromXmlDemo
// Invoke all demos.
public boolean runDemo()
{
boolean returnCode = true;
boolean tempReturnCode;
// Call the IsSubsetOf demo.
if (tempReturnCode = IsSubsetOfDemo()) {
Console.get_Out().WriteLine("IsSubsetOf demo "
+ "completed successfully.");
}
else {
Console.get_Out().WriteLine("IsSubsetOf demo failed.");
}
returnCode = tempReturnCode && returnCode;
// Call the Union demo.
if (tempReturnCode = UnionDemo()) {
Console.get_Out().WriteLine("Union demo completed successfully.");
}
else {
Console.get_Out().WriteLine("Union demo failed.");
}
returnCode = tempReturnCode && returnCode;
// Call the Intersect demo.
if (tempReturnCode = IntersectDemo()) {
Console.get_Out().WriteLine("Intersect demo completed "
+ "successfully.");
}
else {
Console.get_Out().WriteLine("Intersect demo failed.");
}
returnCode = tempReturnCode && returnCode;
// Call the Copy demo.
if (tempReturnCode = CopyDemo()) {
Console.get_Out().WriteLine("Copy demo completed successfully.");
}
else {
Console.get_Out().WriteLine("Copy demo failed.");
}
returnCode = tempReturnCode && returnCode;
// Call the ToFromXml demo.
if (tempReturnCode = ToFromXmlDemo()) {
Console.get_Out().WriteLine("ToFromXml demo completed "
+ "successfully.");
}
else {
Console.get_Out().WriteLine("ToFromXml demo failed.");
}
returnCode = tempReturnCode && returnCode;
return returnCode ;
} //runDemo
// Test harness.
public static void main(String[] args)
{
try {
ReflectionPermissionDemo democase =
new ReflectionPermissionDemo();
boolean returnCode = democase.runDemo();
if (returnCode) {
Console.get_Out().WriteLine("ReflectionPermission "
+ "demo completed successfully.");
Console.get_Out().WriteLine("Press the Enter key to exit.");
String consoleInput = Console.ReadLine();
System.Environment.set_ExitCode(100);
}
else {
Console.get_Out().WriteLine(
"ReflectionPermission demo failed.");
Console.get_Out().WriteLine("Press the Enter key to exit.");
String consoleInput = Console.ReadLine();
System.Environment.set_ExitCode(101);
}
}
catch(System.Exception e) {
Console.get_Out().WriteLine("ReflectionPermission demo failed.");
Console.WriteLine(e.ToString());
Console.get_Out().WriteLine("Press the Enter key to exit.");
String consoleInput = Console.ReadLine();
System.Environment.set_ExitCode(101);
}
} //main
} //ReflectionPermissionDemo
// This class generates ReflectionPermission objects.
class ReflectionGenerator
{
private ReflectionPermissionFlag myReflection[] = {
ReflectionPermissionFlag.AllFlags,
ReflectionPermissionFlag.MemberAccess,
ReflectionPermissionFlag.NoFlags,
ReflectionPermissionFlag.ReflectionEmit,
ReflectionPermissionFlag.TypeInformation};
private int reflectionIndex = 0;
public ReflectionGenerator()
{
ResetIndex();
} //ReflectionGenerator
public void ResetIndex()
{
reflectionIndex = 0;
} //ResetIndex
// CreateReflection creates a ReflectionPermission object.
public boolean CreateReflection(ReflectionPermission reflectionPerm[],
ReflectionPermissionFlag reflection[])
{
if (reflectionIndex >= myReflection.length) {
reflectionPerm[0] = new ReflectionPermission(PermissionState.None);
reflection[0] = ReflectionPermissionFlag.NoFlags;
reflectionIndex++;
return false ;
}
reflection[0] = myReflection[reflectionIndex ++];
try {
reflectionPerm[0] = new ReflectionPermission(reflection[0]);
return true ;
}
catch(System.Exception e){
Console.WriteLine(("Cannot create ReflectionPermission: "
+ reflection[0] + " " + e));
reflectionPerm[0] = new ReflectionPermission(PermissionState.None);
reflection[0] = ReflectionPermissionFlag.NoFlags;
return true ;
}
} //CreateReflection
} //ReflectionGenerator
继承层次结构
System.Object
System.Security.CodeAccessPermission
System.Security.Permissions.ReflectionPermission
线程安全
此类型的任何公共静态（Visual Basic 中的 Shared）成员都是线程安全的，但不保证所有实例成员都是线程安全的。
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
ReflectionPermission 成员
System.Security.Permissions 命名空间
ReflectionPermissionAttribute
ReflectionPermissionFlag