CodeAccessSecurityAttribute 类
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
注意
Code Access Security is not supported or honored by the runtime.
注意
CAS support is not available with Silverlight applications.
为代码访问安全性指定基特性类。
public ref class CodeAccessSecurityAttribute abstract : System::Security::Permissions::SecurityAttribute
[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
[System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public abstract class CodeAccessSecurityAttribute : System.Security.Permissions.SecurityAttribute
[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
public abstract class CodeAccessSecurityAttribute : System.Security.Permissions.SecurityAttribute
[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
[System.Serializable]
public abstract class CodeAccessSecurityAttribute : System.Security.Permissions.SecurityAttribute
[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class CodeAccessSecurityAttribute : System.Security.Permissions.SecurityAttribute
[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Obsolete("CAS support is not available with Silverlight applications.")]
public abstract class CodeAccessSecurityAttribute : System.Security.Permissions.SecurityAttribute
[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
[<System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type CodeAccessSecurityAttribute = class
inherit SecurityAttribute
[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
type CodeAccessSecurityAttribute = class
inherit SecurityAttribute
[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
[<System.Serializable>]
type CodeAccessSecurityAttribute = class
inherit SecurityAttribute
[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type CodeAccessSecurityAttribute = class
inherit SecurityAttribute
[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Obsolete("CAS support is not available with Silverlight applications.")>]
type CodeAccessSecurityAttribute = class
inherit SecurityAttribute
Public MustInherit Class CodeAccessSecurityAttribute
Inherits SecurityAttribute
- 继承
- 派生
- 属性
示例
以下示例显示了派生自 CodeAccessSecurityAttribute 该类的权限属性。
using namespace System;
using namespace System::IO;
using namespace System::Runtime::Remoting;
using namespace System::Security;
using namespace System::Security::Permissions;
using namespace System::Reflection;
using namespace MyPermission;
// Use the command line option '/keyfile' or appropriate project settings to sign this assembly.
[assembly:System::Security::AllowPartiallyTrustedCallersAttribute];
[AttributeUsage(AttributeTargets::Method|AttributeTargets::Constructor|AttributeTargets::Class|AttributeTargets::Struct|AttributeTargets::Assembly,AllowMultiple=true,Inherited=false)]
[Serializable]
public ref class NameIdPermissionAttribute: public CodeAccessSecurityAttribute
{
private:
String^ m_Name;
bool m_unrestricted;
public:
NameIdPermissionAttribute( SecurityAction action )
: CodeAccessSecurityAttribute( action )
{
m_Name = nullptr;
m_unrestricted = false;
}
property String^ Name
{
String^ get()
{
return m_Name;
}
void set( String^ value )
{
m_Name = value;
}
}
virtual IPermission^ CreatePermission() override
{
if ( m_unrestricted )
{
throw gcnew ArgumentException( "Unrestricted permissions not allowed in identity permissions." );
}
else
{
if ( m_Name == nullptr )
return gcnew NameIdPermission( PermissionState::None );
return gcnew NameIdPermission( m_Name );
}
}
};
using System;
using System.IO;
using System.Runtime.Remoting;
using System.Security;
using System.Security.Permissions;
using System.Reflection;
using MyPermission;
// Use the command line option '/keyfile' or appropriate project settings to sign this assembly.
[assembly: System.Security.AllowPartiallyTrustedCallersAttribute ()]
namespace MyPermissionAttribute
{
[AttributeUsage (AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Assembly, AllowMultiple = true, Inherited = false)]
[Serializable]
sealed public class NameIdPermissionAttribute : CodeAccessSecurityAttribute
{
private String m_Name = null;
private bool m_unrestricted = false;
public NameIdPermissionAttribute (SecurityAction action): base( action )
{
}
public String Name
{
get { return m_Name; }
set { m_Name = value; }
}
public override IPermission CreatePermission ()
{
if (m_unrestricted)
{
throw new ArgumentException ("Unrestricted permissions not allowed in identity permissions.");
}
else
{
if (m_Name == null)
return new NameIdPermission (PermissionState.None);
return new NameIdPermission (m_Name);
}
}
}
}
Imports System.IO
Imports System.Runtime.Remoting
Imports System.Security
Imports System.Security.Permissions
Imports System.Reflection
Imports MyPermission
' Use the command line option '/keyfile' or appropriate project settings to sign this assembly.
<Assembly: System.Security.AllowPartiallyTrustedCallersAttribute()>
Namespace MyPermissionAttribute
<AttributeUsage(AttributeTargets.All, AllowMultiple:=True, Inherited:=False)> Public NotInheritable Class NameIdPermissionAttribute
Inherits CodeAccessSecurityAttribute
Private m_Name As String = Nothing
Private m_unrestricted As Boolean = False
Public Sub New(ByVal action As SecurityAction)
MyBase.New(action)
End Sub
Public Property Name() As String
Get
Return m_name
End Get
Set(ByVal Value As String)
m_name = Value
End Set
End Property
Public Overrides Function CreatePermission() As IPermission
If m_unrestricted Then
Throw New ArgumentException("Unrestricted permissions not allowed in identity permissions.")
Else
If m_name Is Nothing Then
Return New NameIdPermission(PermissionState.None)
End If
Return New NameIdPermission(m_name)
End If
End Function 'CreatePermission
End Class
End Namespace
注解
注意
代码访问安全性 (CAS) 已在所有版本的 .NET Framework 和 .NET 中弃用。 使用与 CAS 相关的 API 时,最新版本的 .NET 不遵循 CAS 注释并生成错误。 开发人员应寻求实现安全任务的替代方法。
此属性类将一个 SecurityAction例如 Demand
,与自定义安全属性相关联。
派 CodeAccessSecurityAttribute 生的类型用于帮助限制对资源或安全操作的访问。
安全属性声明的安全信息存储在属性目标的元数据中,并在运行时由系统访问。 安全属性仅用于声明性安全性。 使用派生自 CodeAccessPermission 的相应权限类实现命令性安全性。
实施者说明
派生自此类的所有权限属性必须只有一个采用唯一参数的构造函数 SecurityAction 。
构造函数
CodeAccessSecurityAttribute(SecurityAction) |
用指定的 CodeAccessSecurityAttribute 初始化 SecurityAction 的新实例。 |
属性
Action |
获取或设置安全性操作。 (继承自 SecurityAttribute) |
TypeId |
在派生类中实现时,获取此 Attribute 的唯一标识符。 (继承自 Attribute) |
Unrestricted |
获取或设置一个值,该值指示是否声明了对受该特性保护的资源有完全(无限制的)权限。 (继承自 SecurityAttribute) |
方法
CreatePermission() |
当在派生类中重写时,创建一个权限对象,随后可将其序列化为二进制形式并连同 SecurityAction 长久存储在程序集的元数据中。 (继承自 SecurityAttribute) |
Equals(Object) |
返回一个值,该值指示此实例是否与指定的对象相等。 (继承自 Attribute) |
GetHashCode() |
返回此实例的哈希代码。 (继承自 Attribute) |
GetType() |
获取当前实例的 Type。 (继承自 Object) |
IsDefaultAttribute() |
在派生类中重写时,指示此实例的值是否是派生类的默认值。 (继承自 Attribute) |
Match(Object) |
当在派生类中重写时,返回一个指示此实例是否等于指定对象的值。 (继承自 Attribute) |
MemberwiseClone() |
创建当前 Object 的浅表副本。 (继承自 Object) |
ToString() |
返回表示当前对象的字符串。 (继承自 Object) |
显式接口实现
_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) |
将一组名称映射为对应的一组调度标识符。 (继承自 Attribute) |
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) |
检索对象的类型信息,然后可以使用该信息获取接口的类型信息。 (继承自 Attribute) |
_Attribute.GetTypeInfoCount(UInt32) |
检索对象提供的类型信息接口的数量(0 或 1)。 (继承自 Attribute) |
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) |
提供对某一对象公开的属性和方法的访问。 (继承自 Attribute) |