SecurityPermission 类
描述应用于代码的安全权限集。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 SecurityPermission
Inherits CodeAccessPermission
Implements IUnrestrictedPermission
用法
Dim instance As SecurityPermission
[SerializableAttribute]
[ComVisibleAttribute(true)]
public sealed class SecurityPermission : CodeAccessPermission, IUnrestrictedPermission
[SerializableAttribute]
[ComVisibleAttribute(true)]
public ref class SecurityPermission sealed : public CodeAccessPermission, IUnrestrictedPermission
/** @attribute SerializableAttribute() */
/** @attribute ComVisibleAttribute(true) */
public final class SecurityPermission extends CodeAccessPermission implements IUnrestrictedPermission
SerializableAttribute
ComVisibleAttribute(true)
public final class SecurityPermission extends CodeAccessPermission implements IUnrestrictedPermission
备注
该权限使用 SecurityPermissionFlag 枚举。该枚举的值可以在其文档中找到。
示例
下面的代码示例演示 SecurityPermission 类方法的行为。该示例旨在演示方法的结果，而不演示通常是如何使用这些方法的。有关使用 SecurityPermission 类以要求对指定 SecurityPermissionFlag 枚举值的权限的示例，请参见 SecurityPermission(SecurityPermissionFlag) 构造函数。
Imports System
Imports System.Security
Imports System.Security.Permissions
Imports Microsoft.VisualBasic
<Assembly: CLSCompliant(True)>
Public Class SecurityPermissionDemo
' IsSubsetOf determines whether the current permission is a subset of the specified permission.
Private Function IsSubsetOfDemo() As Boolean
Dim returnValue As Boolean = True
Dim Security1, Security2 As SecurityPermissionFlag
Dim SecurityPerm1, SecurityPerm2 As SecurityPermission
Dim SecurityGen1 As New SecurityGenerator()
Dim SecurityGen2 As New SecurityGenerator()
SecurityGen1.ResetIndex()
While SecurityGen1.GetSecurityFlag(Security1)
SecurityPerm1 = New SecurityPermission(Security1)
SecurityGen2.ResetIndex()
Console.WriteLine("********************************************************" & ControlChars.Lf)
While SecurityGen2.GetSecurityFlag(Security2)
SecurityPerm2 = New SecurityPermission(Security2)
Try
If SecurityPerm1.IsSubsetOf(SecurityPerm2) Then
Console.WriteLine((SecurityPerm1.Flags.ToString().ToString() _
& " is a subset of " & SecurityPerm2.Flags.ToString()))
Else
Console.WriteLine((SecurityPerm1.Flags.ToString() & " is not a subset of " _
& SecurityPerm2.Flags.ToString()))
End If
Catch e As Exception
Console.WriteLine(("An exception was thrown for subset :" & SecurityPerm1.ToString() _
& ControlChars.Lf & SecurityPerm2.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 Security1, Security2 As SecurityPermissionFlag
Dim SecurityPerm1, SecurityPerm2 As SecurityPermission
Dim SecurityPerm3 As IPermission
Dim SecurityGen1 As New SecurityGenerator()
Dim SecurityGen2 As New SecurityGenerator()
SecurityGen1.ResetIndex()
While SecurityGen1.GetSecurityFlag(Security1)
SecurityPerm1 = New SecurityPermission(Security1)
Console.WriteLine("**********************************************************" & ControlChars.Lf)
SecurityGen2.ResetIndex()
While SecurityGen2.GetSecurityFlag(Security2)
SecurityPerm2 = New SecurityPermission(Security2)
SecurityPerm3 = CType(SecurityPerm1.Union(SecurityPerm2), SecurityPermission)
SecurityPerm3 = SecurityPerm1.Union(SecurityPerm2)
If SecurityPerm3 Is Nothing Then
Console.WriteLine(("The union of " & Security1 & " and " & Security2 & " is null."))
Else
Console.WriteLine(("The union of " & SecurityPerm1.Flags.ToString() _
& " and " & SecurityPerm2.Flags.ToString() & " = " & CType(SecurityPerm3, SecurityPermission).Flags.ToString().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 Security1, Security2 As SecurityPermissionFlag
Dim SecurityPerm1, SecurityPerm2, SecurityPerm3 As SecurityPermission
Dim SecurityGen1 As New SecurityGenerator()
Dim SecurityGen2 As New SecurityGenerator()
SecurityGen1.ResetIndex()
While SecurityGen1.GetSecurityFlag(Security1)
SecurityPerm1 = New SecurityPermission(Security1)
Console.WriteLine("**********************************************************" & ControlChars.Lf)
SecurityGen2.ResetIndex()
While SecurityGen2.GetSecurityFlag(Security2)
SecurityPerm2 = New SecurityPermission(Security2)
SecurityPerm3 = CType(SecurityPerm1.Intersect(SecurityPerm2), SecurityPermission)
If Not (SecurityPerm3 Is Nothing) Then
Console.WriteLine(("The intersection of " & Security1.ToString() & " and " _
& Security2.ToString() & " = " _
& CType(SecurityPerm3, SecurityPermission).Flags.ToString().ToString()))
Else
Console.WriteLine(("The intersection of " & Security1.ToString() & " and " _
& Security2.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 Security1 As SecurityPermissionFlag
Dim SecurityPerm1, SecurityPerm2 As SecurityPermission
Dim SecurityGen1 As New SecurityGenerator()
Dim SecurityGen2 As New SecurityGenerator()
SecurityGen1.ResetIndex()
While SecurityGen1.GetSecurityFlag(Security1)
SecurityPerm1 = New SecurityPermission(Security1)
SecurityGen2.ResetIndex()
Console.WriteLine("********************************************************" & ControlChars.Lf)
Try
SecurityPerm2 = CType(SecurityPerm1.Copy(), SecurityPermission)
Console.WriteLine(("Result of copy = " & SecurityPerm2.ToString()))
Catch e As Exception
Console.WriteLine(("Copy failed :" & SecurityPerm1.ToString() & e.ToString()))
GoTo ContinueWhile1
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 Security1 As SecurityPermissionFlag
Dim SecurityPerm1, SecurityPerm2 As SecurityPermission
Dim SecurityGen1 As New SecurityGenerator()
Dim SecurityGen2 As New SecurityGenerator()
SecurityGen1.ResetIndex()
While SecurityGen1.GetSecurityFlag(Security1)
SecurityPerm1 = New SecurityPermission(Security1)
Console.WriteLine("********************************************************" & ControlChars.Lf)
SecurityGen2.ResetIndex()
Try
SecurityPerm2 = New SecurityPermission(PermissionState.None)
SecurityPerm2.FromXml(SecurityPerm1.ToXml())
Console.WriteLine(("Result of ToFromXml = " & SecurityPerm2.ToString()))
Catch e As Exception
Console.WriteLine(("ToFromXml failed :" & SecurityPerm1.ToString() & e.ToString()))
GoTo ContinueWhile1
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 SecurityPermissionDemo()
Dim returnCode As Boolean = democase.runDemo()
If returnCode Then
Console.Out.WriteLine("SecurityPermission 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("SecurityPermission 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("SecurityPermission 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 'SecurityPermissionDemo
' This class generates SecurityPermission objects.
Friend Class SecurityGenerator
Private mySecurity As SecurityPermissionFlag() = {SecurityPermissionFlag.AllFlags, _
SecurityPermissionFlag.Assertion Or SecurityPermissionFlag.ControlAppDomain, _
SecurityPermissionFlag.ControlAppDomain, _
SecurityPermissionFlag.ControlDomainPolicy Or SecurityPermissionFlag.ControlEvidence, _
SecurityPermissionFlag.ControlEvidence, _
SecurityPermissionFlag.ControlPolicy Or SecurityPermissionFlag.ControlPrincipal, _
SecurityPermissionFlag.ControlPrincipal, _
SecurityPermissionFlag.ControlThread, _
SecurityPermissionFlag.Execution, _
SecurityPermissionFlag.Infrastructure, _
SecurityPermissionFlag.NoFlags, _
SecurityPermissionFlag.RemotingConfiguration Or SecurityPermissionFlag.SerializationFormatter, _
SecurityPermissionFlag.SerializationFormatter, _
SecurityPermissionFlag.SkipVerification, _
SecurityPermissionFlag.UnmanagedCode}
Private reflectionIndex As Integer = 0
Public Sub New()
ResetIndex()
End Sub 'New
Public Sub ResetIndex()
reflectionIndex = 0
End Sub 'ResetIndex
' GetSecurityFlag creates a SecurityPermission object.
Public Function GetSecurityFlag(ByRef Security As SecurityPermissionFlag) As Boolean
If reflectionIndex >= mySecurity.Length Then
Security = SecurityPermissionFlag.NoFlags
reflectionIndex &= 1
Return False
End If
Security = mySecurity(reflectionIndex)
reflectionIndex = reflectionIndex + 1
Return True
End Function
using System;
using System.Security;
using System.Security.Permissions;
[assembly:CLSCompliant(true)]
public class SecurityPermissionDemo
{
// IsSubsetOf determines whether the current permission is a subset of the specified permission.
private bool IsSubsetOfDemo()
{
bool returnValue = true;
SecurityPermissionFlag security1,security2;
SecurityPermission securityPerm1,securityPerm2;
SecurityGenerator SecurityGen1 = new SecurityGenerator();
SecurityGenerator SecurityGen2 = new SecurityGenerator();
SecurityGen1.ResetIndex();
while(SecurityGen1.GetSecurityFlag( out security1 ))
{
securityPerm1 = new SecurityPermission(security1);
SecurityGen2.ResetIndex();
Console.WriteLine("********************************************************\n");
while(SecurityGen2.GetSecurityFlag( out security2 ))
{
securityPerm2 = new SecurityPermission(security2);
try
{
if (securityPerm1.IsSubsetOf(securityPerm2))
{
Console.WriteLine(securityPerm1.Flags + " is a subset of " +
securityPerm2.Flags);
}
else
{
Console.WriteLine(securityPerm1.Flags + " is not a subset of " +
securityPerm2.Flags);
}
}
catch(Exception e)
{
Console.WriteLine("An exception was thrown for subset :" + securityPerm1 + "\n" +
securityPerm2 +"\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;
SecurityPermissionFlag security1,security2;
SecurityPermission securityPerm1,securityPerm2;
IPermission SecurityPerm3;
SecurityGenerator SecurityGen1 = new SecurityGenerator();
SecurityGenerator SecurityGen2 = new SecurityGenerator();
SecurityGen1.ResetIndex();
while(SecurityGen1.GetSecurityFlag( out security1 ))
{
securityPerm1 = new SecurityPermission(security1);
Console.WriteLine("**********************************************************\n");
SecurityGen2.ResetIndex();
while(SecurityGen2.GetSecurityFlag( out security2 ))
{
securityPerm2 = new SecurityPermission(security2);
SecurityPerm3 = (SecurityPermission)securityPerm1.Union(securityPerm2);
SecurityPerm3 = securityPerm1.Union(securityPerm2);
if(SecurityPerm3 == null)
{
Console.WriteLine("The union of " + security1 + " and " + security2 + " is null." );
}
else
{
Console.WriteLine("The union of " + securityPerm1.Flags + " and " +
securityPerm2.Flags + " = " +
((SecurityPermission)SecurityPerm3).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;
SecurityPermissionFlag security1,security2;
SecurityPermission securityPerm1,securityPerm2,SecurityPerm3;
SecurityGenerator SecurityGen1 = new SecurityGenerator();
SecurityGenerator SecurityGen2 = new SecurityGenerator();
SecurityGen1.ResetIndex();
while(SecurityGen1.GetSecurityFlag( out security1 ))
{
securityPerm1 = new SecurityPermission(security1);
Console.WriteLine("**********************************************************\n");
SecurityGen2.ResetIndex();
while(SecurityGen2.GetSecurityFlag( out security2 ))
{
securityPerm2 = new SecurityPermission(security2);
SecurityPerm3 = (SecurityPermission)securityPerm1.Intersect(securityPerm2);
if (SecurityPerm3 != null)
{
Console.WriteLine("The intersection of " + security1 + " and " + security2 + " = " +
((SecurityPermission)SecurityPerm3).Flags.ToString());
}
else
{
Console.WriteLine("The intersection of " + security1 + " and " + security2 + " is null." );
}
}
}
return returnValue;
}
//Copy creates and returns an identical copy of the current permission.
private bool CopyDemo()
{
bool returnValue = true;
SecurityPermissionFlag security1;
SecurityPermission securityPerm1,securityPerm2;
SecurityGenerator SecurityGen1 = new SecurityGenerator();
SecurityGenerator SecurityGen2 = new SecurityGenerator();
SecurityGen1.ResetIndex();
while(SecurityGen1.GetSecurityFlag( out security1 ))
{
securityPerm1 = new SecurityPermission(security1);
SecurityGen2.ResetIndex();
Console.WriteLine("********************************************************\n");
try
{
securityPerm2 = (SecurityPermission)securityPerm1.Copy();
Console.WriteLine("Result of copy = " + securityPerm2.ToString());
}
catch(Exception e)
{
Console.WriteLine("Copy failed :" + securityPerm1.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;
SecurityPermissionFlag security1;
SecurityPermission securityPerm1,securityPerm2;
SecurityGenerator SecurityGen1 = new SecurityGenerator();
SecurityGenerator SecurityGen2 = new SecurityGenerator();
SecurityGen1.ResetIndex();
while(SecurityGen1.GetSecurityFlag( out security1 ))
{
securityPerm1 = new SecurityPermission(security1);
Console.WriteLine("********************************************************\n");
SecurityGen2.ResetIndex();
try
{
securityPerm2= new SecurityPermission(PermissionState.None);
securityPerm2.FromXml(securityPerm1.ToXml());
Console.WriteLine("Result of ToFromXml = " +
securityPerm2.ToString());
}
catch(Exception e)
{
Console.WriteLine("ToFromXml failed :" + securityPerm1.ToString() + e);
continue;
}
}
return returnValue;
}
// Invoke all demos.
public bool runDemo()
{
bool returnCode = true;
bool tempReturnCode;
// Call the IsSubsetOf demo.
tempReturnCode= IsSubsetOfDemo();
if(tempReturnCode)Console.Out.WriteLine("IsSubsetOf demo completed successfully.");
else Console.Out.WriteLine("IsSubsetOf demo failed.");
returnCode=tempReturnCode && returnCode;
// Call the Union demo.
tempReturnCode= UnionDemo();
if(tempReturnCode)Console.Out.WriteLine("Union demo completed successfully.");
else Console.Out.WriteLine("Union demo failed.");
returnCode=tempReturnCode && returnCode;
// Call the Intersect demo.
tempReturnCode= IntersectDemo();
if(tempReturnCode)Console.Out.WriteLine("Intersect demo completed successfully.");
else Console.Out.WriteLine("Intersect demo failed.");
returnCode=tempReturnCode && returnCode;
// Call the Copy demo.
tempReturnCode= CopyDemo();
if(tempReturnCode)Console.Out.WriteLine("Copy demo completed successfully.");
else Console.Out.WriteLine("Copy demo failed.");
returnCode=tempReturnCode && returnCode;
// Call the ToFromXml demo.
tempReturnCode= ToFromXmlDemo();
if(tempReturnCode)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
{
SecurityPermissionDemo democase = new SecurityPermissionDemo();
bool returnCode = democase.runDemo();
if (returnCode)
{
Console.Out.WriteLine("SecurityPermission demo completed successfully.");
Console.Out.WriteLine("Press the Enter key to exit.");
string consoleInput = Console.ReadLine();
System.Environment.ExitCode = 100;
}
else
{
Console.Out.WriteLine("SecurityPermission 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("SecurityPermission 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 SecurityPermission objects.
internal class SecurityGenerator
{
private SecurityPermissionFlag[] mySecurity =
{
SecurityPermissionFlag.AllFlags,
SecurityPermissionFlag.Assertion |
SecurityPermissionFlag.ControlAppDomain,
SecurityPermissionFlag.ControlAppDomain,
SecurityPermissionFlag.ControlDomainPolicy |
SecurityPermissionFlag.ControlEvidence,
SecurityPermissionFlag.ControlEvidence,
SecurityPermissionFlag.ControlPolicy |
SecurityPermissionFlag.ControlPrincipal,
SecurityPermissionFlag.ControlPrincipal,
SecurityPermissionFlag.ControlThread,
SecurityPermissionFlag.Execution,
SecurityPermissionFlag.Infrastructure,
SecurityPermissionFlag.NoFlags,
SecurityPermissionFlag.RemotingConfiguration |
SecurityPermissionFlag.SerializationFormatter,
SecurityPermissionFlag.SerializationFormatter,
SecurityPermissionFlag.SkipVerification,
SecurityPermissionFlag.UnmanagedCode};
private int reflectionIndex = 0;
public SecurityGenerator()
{
ResetIndex();
}
public void ResetIndex()
{
reflectionIndex = 0;
}
// GetSecurityFlag returns a SecurityPermissionFlag.
public bool GetSecurityFlag(out SecurityPermissionFlag security)
{
if(reflectionIndex >= mySecurity.Length)
{
security = SecurityPermissionFlag.NoFlags;
reflectionIndex++;
return false;
}
security = mySecurity[reflectionIndex++];
return true;
}
} //
using namespace System;
using namespace System::Security;
using namespace System::Security::Permissions;
using namespace System::Runtime::InteropServices;
// This class generates SecurityPermission objects.
[assembly:CLSCompliant(true)];
private ref class SecurityGenerator
{
private:
array<SecurityPermissionFlag>^mySecurity;
int reflectionIndex;
public:
SecurityGenerator()
{
array<SecurityPermissionFlag>^ temp = {SecurityPermissionFlag::AllFlags,
SecurityPermissionFlag::Assertion |
SecurityPermissionFlag::ControlAppDomain,
SecurityPermissionFlag::ControlAppDomain,
SecurityPermissionFlag::ControlDomainPolicy |
SecurityPermissionFlag::ControlEvidence,
SecurityPermissionFlag::ControlEvidence,
SecurityPermissionFlag::ControlPolicy |
SecurityPermissionFlag::ControlPrincipal,
SecurityPermissionFlag::ControlPrincipal,
SecurityPermissionFlag::ControlThread,
SecurityPermissionFlag::Execution,
SecurityPermissionFlag::Infrastructure,
SecurityPermissionFlag::NoFlags,
SecurityPermissionFlag::RemotingConfiguration |
SecurityPermissionFlag::SerializationFormatter,
SecurityPermissionFlag::SerializationFormatter,
SecurityPermissionFlag::SkipVerification,
SecurityPermissionFlag::UnmanagedCode};
mySecurity = temp;
reflectionIndex = 0;
ResetIndex();
}
void ResetIndex()
{
reflectionIndex = 0;
}
// GetSecurityFlag creates a SecurityPermission object.
bool GetSecurityFlag( [Out]SecurityPermissionFlag * security )
{
if ( reflectionIndex >= mySecurity->Length )
{
*security = SecurityPermissionFlag::NoFlags;
reflectionIndex++;
return false;
}
*security = mySecurity[ reflectionIndex++ ];
return true;
}
};
// End of SecurityGenerator.
public ref class SecurityPermissionDemo
{
private:
// IsSubsetOf determines whether the current permission is a subset of the specified permission.
bool IsSubsetOfDemo()
{
bool returnValue = true;
SecurityPermissionFlag security1;
SecurityPermissionFlag security2;
SecurityPermission^ securityPerm1;
SecurityPermission^ securityPerm2;
SecurityGenerator^ SecurityGen1 = gcnew SecurityGenerator;
SecurityGenerator^ SecurityGen2 = gcnew SecurityGenerator;
SecurityGen1->ResetIndex();
while ( SecurityGen1->GetSecurityFlag( &security1 ) )
{
securityPerm1 = gcnew SecurityPermission(security1);
SecurityGen2->ResetIndex();
Console::WriteLine( "********************************************************\n" );
while ( SecurityGen2->GetSecurityFlag( &security2 ) )
{
securityPerm2 = gcnew SecurityPermission(security2);
try
{
if ( securityPerm1->IsSubsetOf( securityPerm2 ) )
{
Console::WriteLine( "{0} is a subset of {1}", securityPerm1->Flags, securityPerm2->Flags );
}
else
{
Console::WriteLine( "{0} is not a subset of {1}", securityPerm1->Flags, securityPerm2->Flags );
}
}
catch ( Exception^ e )
{
Console::WriteLine( "An exception was thrown for subset :{0}\n{1}\n{2}", securityPerm1, securityPerm2, 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;
SecurityPermissionFlag security1;
SecurityPermissionFlag security2;
SecurityPermission^ securityPerm1;
SecurityPermission^ securityPerm2;
IPermission^ SecurityPerm3;
SecurityGenerator^ SecurityGen1 = gcnew SecurityGenerator;
SecurityGenerator^ SecurityGen2 = gcnew SecurityGenerator;
SecurityGen1->ResetIndex();
while ( SecurityGen1->GetSecurityFlag( &security1 ) )
{
securityPerm1 = gcnew SecurityPermission(security1);
Console::WriteLine( "**********************************************************\n" );
SecurityGen2->ResetIndex();
while ( SecurityGen2->GetSecurityFlag( &security2 ) )
{
securityPerm2 = gcnew SecurityPermission(security2);
SecurityPerm3 = dynamic_cast<SecurityPermission^>(securityPerm1->Union( securityPerm2 ));
SecurityPerm3 = securityPerm1->Union( securityPerm2 );
if ( SecurityPerm3 == nullptr )
{
Console::WriteLine( "The union of {0} and {1} is null.", security1, security2 );
}
else
{
Console::WriteLine( "The union of {0} and {1} = {2}", securityPerm1->Flags, securityPerm2->Flags, (dynamic_cast<SecurityPermission^>(SecurityPerm3))->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;
SecurityPermissionFlag security1;
SecurityPermissionFlag security2;
SecurityPermission^ securityPerm1;
SecurityPermission^ securityPerm2;
SecurityPermission^ SecurityPerm3;
SecurityGenerator^ SecurityGen1 = gcnew SecurityGenerator;
SecurityGenerator^ SecurityGen2 = gcnew SecurityGenerator;
SecurityGen1->ResetIndex();
while ( SecurityGen1->GetSecurityFlag( &security1 ) )
{
securityPerm1 = gcnew SecurityPermission(security1);
Console::WriteLine( "**********************************************************\n" );
SecurityGen2->ResetIndex();
while ( SecurityGen2->GetSecurityFlag( &security2 ) )
{
securityPerm2 = gcnew SecurityPermission(security2);
SecurityPerm3 = dynamic_cast<SecurityPermission^>(securityPerm1->Intersect( securityPerm2 ));
if ( SecurityPerm3 != nullptr )
{
Console::WriteLine( "The intersection of {0} and {1} = {2}", security1, security2, (dynamic_cast<SecurityPermission^>(SecurityPerm3))->Flags );
}
else
{
Console::WriteLine( "The intersection of {0} and {1} is null.", security1, security2 );
}
}
}
return returnValue;
}
//Copy creates and returns an identical copy of the current permission.
bool CopyDemo()
{
bool returnValue = true;
SecurityPermissionFlag security1;
SecurityPermission^ securityPerm1;
SecurityPermission^ securityPerm2;
SecurityGenerator^ SecurityGen1 = gcnew SecurityGenerator;
SecurityGenerator^ SecurityGen2 = gcnew SecurityGenerator;
SecurityGen1->ResetIndex();
while ( SecurityGen1->GetSecurityFlag( &security1 ) )
{
securityPerm1 = gcnew SecurityPermission(security1);
continue;
SecurityGen2->ResetIndex();
Console::WriteLine( "********************************************************\n" );
try
{
securityPerm2 = dynamic_cast<SecurityPermission^>(securityPerm1->Copy());
Console::WriteLine( "Result of copy = {0}", securityPerm2 );
}
catch ( Exception^ e )
{
Console::WriteLine( "Copy failed :{0}{1}", securityPerm1, 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;
SecurityPermissionFlag security1;
SecurityPermission^ securityPerm1;
SecurityPermission^ securityPerm2;
SecurityGenerator^ SecurityGen1 = gcnew SecurityGenerator;
SecurityGenerator^ SecurityGen2 = gcnew SecurityGenerator;
SecurityGen1->ResetIndex();
while ( SecurityGen1->GetSecurityFlag( &security1 ) )
{
securityPerm1 = gcnew SecurityPermission(security1);
continue;
Console::WriteLine( "********************************************************\n" );
SecurityGen2->ResetIndex();
try
{
securityPerm2 = gcnew SecurityPermission( PermissionState::None );
securityPerm2->FromXml( securityPerm1->ToXml() );
Console::WriteLine( "Result of ToFromXml = {0}", securityPerm2 );
}
catch ( Exception^ e )
{
Console::WriteLine( "ToFromXml failed :{0}{1}", securityPerm1, e );
continue;
}
}
return returnValue;
}
public:
// Invoke all demos.
bool runDemo()
{
bool returnCode = true;
bool tempReturnCode;
// Call the IsSubsetOf demo.
tempReturnCode = IsSubsetOfDemo();
if ( tempReturnCode )
Console::Out->WriteLine( "IsSubsetOf demo completed successfully." );
else
Console::Out->WriteLine( "IsSubsetOf demo failed." );
returnCode = tempReturnCode && returnCode;
// Call the Union demo.
tempReturnCode = UnionDemo();
if ( tempReturnCode )
Console::Out->WriteLine( "Union demo completed successfully." );
else
Console::Out->WriteLine( "Union demo failed." );
returnCode = tempReturnCode && returnCode;
// Call the Intersect demo.
tempReturnCode = IntersectDemo();
if ( tempReturnCode )
Console::Out->WriteLine( "Intersect demo completed successfully." );
else
Console::Out->WriteLine( "Intersect demo failed." );
returnCode = tempReturnCode && returnCode;
// Call the Copy demo.
tempReturnCode = CopyDemo();
if ( tempReturnCode )
Console::Out->WriteLine( "Copy demo completed successfully." );
else
Console::Out->WriteLine( "Copy demo failed." );
returnCode = tempReturnCode && returnCode;
// Call the ToFromXml demo.
tempReturnCode = ToFromXmlDemo();
if ( tempReturnCode )
Console::Out->WriteLine( "ToFromXml demo completed successfully." );
else
Console::Out->WriteLine( "ToFromXml demo failed." );
returnCode = tempReturnCode && returnCode;
return (returnCode);
}
};
// Test harness.
int main()
{
try
{
SecurityPermissionDemo^ democase = gcnew SecurityPermissionDemo;
bool returnCode = democase->runDemo();
if ( returnCode )
{
Console::Out->WriteLine( "SecurityPermission demo completed successfully." );
Console::Out->WriteLine( "Press the Enter key to exit." );
String^ consoleInput = Console::ReadLine();
System::Environment::ExitCode = 100;
}
else
{
Console::Out->WriteLine( "SecurityPermission 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( "SecurityPermission demo failed." );
Console::WriteLine( e );
Console::Out->WriteLine( "Press the Enter key to exit." );
String^ consoleInput = Console::ReadLine();
System::Environment::ExitCode = 101;
}
}
import System.*;
import System.Security.*;
import System.Security.Permissions.*;
/** @assembly CLSCompliant(true)
*/
public class SecurityPermissionDemo
{
// IsSubsetOf determines whether the current permission is a
// subset of the specified permission.
private boolean IsSubsetOfDemo()
{
boolean returnValue = true;
SecurityPermissionFlag security1[] = new SecurityPermissionFlag[1];
SecurityPermissionFlag security2[] = new SecurityPermissionFlag[1];
SecurityPermission securityPerm1[] = new SecurityPermission[1];
SecurityPermission securityPerm2[] = new SecurityPermission[1];
SecurityGenerator securityGen1 = new SecurityGenerator();
SecurityGenerator securityGen2 = new SecurityGenerator();
securityGen1.ResetIndex();
while (securityGen1.CreateSecurity(securityPerm1, security1)) {
if (securityPerm1[0] == null) {
continue ;
}
securityGen2.ResetIndex();
Console.WriteLine("****************************"
+ "****************************\n");
while (securityGen2.CreateSecurity(securityPerm2, security2)) {
if (securityPerm2[0] == null) {
continue ;
}
try {
if (securityPerm1[0].IsSubsetOf(securityPerm2[0])) {
Console.WriteLine((securityPerm1[0].get_Flags()
+ " is a subset of "
+ securityPerm2[0].get_Flags()));
}
else {
Console.WriteLine((securityPerm1[0].get_Flags()
+ " is not a subset of "
+ securityPerm2[0].get_Flags()));
}
}
catch(System.Exception e) {
Console.WriteLine(("An exception was "
+ "thrown for subset :" + securityPerm1[0]
+ "\n" + securityPerm2[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;
SecurityPermissionFlag security1[] = new SecurityPermissionFlag[1];
SecurityPermissionFlag security2[] = new SecurityPermissionFlag[1];
SecurityPermission securityPerm1[] = new SecurityPermission[1];
SecurityPermission securityPerm2[] = new SecurityPermission[1];
IPermission securityPerm3;
SecurityGenerator securityGen1 = new SecurityGenerator();
SecurityGenerator securityGen2 = new SecurityGenerator();
securityGen1.ResetIndex();
while (securityGen1.CreateSecurity(securityPerm1, security1)) {
if (securityPerm1[0] == null) {
continue ;
}
Console.WriteLine("*******************************"
+ "***************************\n");
securityGen2.ResetIndex();
while (securityGen2.CreateSecurity(securityPerm2, security2)) {
if (securityPerm2[0] == null) {
continue ;
}
securityPerm3 =((SecurityPermission)(securityPerm1[0].
Union(securityPerm2[0])));
securityPerm3 = securityPerm1[0].Union(securityPerm2[0]);
if (securityPerm3 == null) {
Console.WriteLine(("The union of " + security1[0]
+ " and " + security2[0] + " is null."));
}
else {
Console.WriteLine(("The union of "
+ securityPerm1[0].get_Flags()
+ " and " + securityPerm2[0].get_Flags() + " = "
+ ((SecurityPermission)(securityPerm3)).
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;
SecurityPermissionFlag security1[] = new SecurityPermissionFlag[1];
SecurityPermissionFlag security2[] = new SecurityPermissionFlag[1];
SecurityPermission securityPerm1[] = new SecurityPermission[1];
SecurityPermission securityPerm2[] = new SecurityPermission[1];
SecurityPermission securityPerm3;
SecurityGenerator securityGen1 = new SecurityGenerator();
SecurityGenerator securityGen2 = new SecurityGenerator();
securityGen1.ResetIndex();
while (securityGen1.CreateSecurity(securityPerm1, security1)) {
if (securityPerm1[0] == null) {
continue ;
}
Console.WriteLine("********************************"
+ "**************************\n");
securityGen2.ResetIndex();
while (securityGen2.CreateSecurity(securityPerm2, security2)) {
if (securityPerm2[0] == null) {
continue ;
}
securityPerm3 =((SecurityPermission)(
securityPerm1[0].Intersect(securityPerm2[0])));
if (securityPerm3 != null) {
Console.WriteLine(("The intersection of "
+ security1[0] + " and " + security2[0] + " = "
+ ((SecurityPermission)(securityPerm3)).
get_Flags().ToString()));
}
else {
Console.WriteLine(("The intersection of "
+ security1[0] + " and " + security2[0] + " is null."));
}
}
}
return returnValue ;
} //IntersectDemo
//Copy creates and returns an identical copy of the current permission.
private boolean CopyDemo()
{
boolean returnValue = true;
SecurityPermissionFlag security1[] = new SecurityPermissionFlag[1];
SecurityPermission securityPerm1[] = new SecurityPermission[1];
SecurityPermission securityPerm2[] = new SecurityPermission[1];
SecurityGenerator securityGen1 = new SecurityGenerator();
SecurityGenerator securityGen2 = new SecurityGenerator();
securityGen1.ResetIndex();
while (securityGen1.CreateSecurity(securityPerm1, security1)) {
if (securityPerm1[0] == null) {
continue ;
}
securityGen2.ResetIndex();
Console.WriteLine("***************************************"
+ "*****************\n");
try {
securityPerm2[0] =((SecurityPermission)(
securityPerm1[0].Copy()));
Console.WriteLine(("Result of copy = "
+ securityPerm2[0].ToString()));
}
catch(System.Exception e) {
Console.WriteLine(("Copy failed :"
+ securityPerm1[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;
SecurityPermissionFlag security1[] = new SecurityPermissionFlag[1];
SecurityPermission securityPerm1[] = new SecurityPermission[1];
SecurityPermission securityPerm2[] = new SecurityPermission[1];
SecurityGenerator securityGen1 = new SecurityGenerator();
SecurityGenerator securityGen2 = new SecurityGenerator();
securityGen1.ResetIndex();
while (securityGen1.CreateSecurity(securityPerm1, security1)) {
if (securityPerm1[0] == null) {
continue ;
}
Console.WriteLine("*****************************"
+ "***************************\n");
securityGen2.ResetIndex();
try {
securityPerm2[0] =
new SecurityPermission(PermissionState.None);
securityPerm2[0].FromXml(securityPerm1[0].ToXml());
Console.WriteLine(("Result of ToFromXml = "
+ securityPerm2[0].ToString()));
}
catch(System.Exception e) {
Console.WriteLine(("ToFromXml failed :"
+ securityPerm1[0].ToString() + e));
continue ;
}
}
return returnValue ;
} //ToFromXmlDemo
// Invoke all demos.
public boolean runDemo()
{
boolean returnCode = true;
boolean tempReturnCode;
// Call the IsSubsetOf demo.
tempReturnCode = IsSubsetOfDemo();
if (tempReturnCode) {
Console.get_Out().WriteLine("IsSubsetOf demo "
+ "completed successfully.");
}
else {
Console.get_Out().WriteLine("IsSubsetOf demo failed.");
}
returnCode = tempReturnCode && returnCode;
// Call the Union demo.
tempReturnCode = UnionDemo();
if (tempReturnCode) {
Console.get_Out().WriteLine("Union demo completed successfully.");
}
else {
Console.get_Out().WriteLine("Union demo failed.");
}
returnCode = tempReturnCode && returnCode;
// Call the Intersect demo.
tempReturnCode = IntersectDemo();
if (tempReturnCode) {
Console.get_Out().WriteLine("Intersect demo "
+ "completed successfully.");
}
else {
Console.get_Out().WriteLine("Intersect demo failed.");
}
returnCode = tempReturnCode && returnCode;
// Call the Copy demo.
tempReturnCode = CopyDemo();
if (tempReturnCode) {
Console.get_Out().WriteLine("Copy demo completed successfully.");
}
else {
Console.get_Out().WriteLine("Copy demo failed.");
}
returnCode = tempReturnCode && returnCode;
// Call the ToFromXml demo.
tempReturnCode = ToFromXmlDemo();
if (tempReturnCode) {
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 {
SecurityPermissionDemo democase = new SecurityPermissionDemo();
boolean returnCode = democase.runDemo();
if (returnCode) {
Console.get_Out().WriteLine("SecurityPermission 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("SecurityPermission 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("SecurityPermission 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
} //SecurityPermissionDemo
// This class generates SecurityPermission objects.
class SecurityGenerator
{
private SecurityPermissionFlag mySecurity[] =
{
SecurityPermissionFlag.AllFlags,
SecurityPermissionFlag.Assertion,
SecurityPermissionFlag.ControlAppDomain,
SecurityPermissionFlag.ControlDomainPolicy,
SecurityPermissionFlag.ControlEvidence,
SecurityPermissionFlag.ControlPolicy,
SecurityPermissionFlag.ControlPrincipal,
SecurityPermissionFlag.ControlThread,
SecurityPermissionFlag.Execution,
SecurityPermissionFlag.Infrastructure,
SecurityPermissionFlag.NoFlags,
SecurityPermissionFlag.RemotingConfiguration,
SecurityPermissionFlag.SerializationFormatter,
SecurityPermissionFlag.SkipVerification,
SecurityPermissionFlag.UnmanagedCode
};
private int reflectionIndex = 0;
public SecurityGenerator()
{
ResetIndex();
} //SecurityGenerator
public void ResetIndex()
{
reflectionIndex = 0;
} //ResetIndex
// CreateSecurity creates a SecurityPermission object.
public boolean CreateSecurity(
SecurityPermission securityPerm[], SecurityPermissionFlag security[])
{
if (reflectionIndex >= mySecurity.length) {
securityPerm[0] = new SecurityPermission(PermissionState.None);
security[0] = SecurityPermissionFlag.NoFlags;
reflectionIndex++;
return false ;
}
security[0] = mySecurity[reflectionIndex++];
try {
securityPerm[0] = new SecurityPermission(security[0]);
return true ;
}
catch(System.Exception e) {
Console.WriteLine(("Cannot create SecurityPermission: "
+ security[0] + " " + e));
securityPerm[0] = new SecurityPermission(PermissionState.None);
security[0] = SecurityPermissionFlag.NoFlags;
return true ;
}
} //CreateSecurity
} //SecurityGenerator
继承层次结构
System.Object
System.Security.CodeAccessPermission
System.Security.Permissions.SecurityPermission
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
SecurityPermission 成员
System.Security.Permissions 命名空间
SecurityPermissionAttribute
SecurityPermissionFlag