CodeAccessSecurityAttribute 类

参考

定义

命名空间:: System.Security.Permissions

程序集:: System.Runtime.dll

程序集:: System.Runtime.Extensions.dll

程序集:: mscorlib.dll

程序集:: netstandard.dll

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: Object

Attribute

SecurityAttribute
CodeAccessSecurityAttribute

派生: System.Configuration.ConfigurationPermissionAttribute

System.Data.Common.DBDataPermissionAttribute

System.Data.OracleClient.OraclePermissionAttribute

System.Diagnostics.EventLogPermissionAttribute

System.Diagnostics.PerformanceCounterPermissionAttribute

更多…

属性: AttributeUsageAttribute ObsoleteAttribute SerializableAttribute ComVisibleAttribute

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)

适用于

通过

CodeAccessSecurityAttribute 类

定义

示例

注解

实施者说明

构造函数

属性

方法

显式接口实现

适用于

另请参阅