MediaPermissionAttribute Class

Definition

Namespace:

System.Security.Permissions

Assembly:

System.Security.Permissions.dll

Caution

Code Access Security is not supported or honored by the runtime.

Allows security actions for MediaPermission to be applied to code using declarative security.

public ref class MediaPermissionAttribute sealed : System::Security::Permissions::CodeAccessSecurityAttribute

[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 sealed class MediaPermissionAttribute : System.Security.Permissions.CodeAccessSecurityAttribute

[<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 MediaPermissionAttribute = class
    inherit CodeAccessSecurityAttribute

Public NotInheritable Class MediaPermissionAttribute
Inherits CodeAccessSecurityAttribute

Inheritance

Object

Attribute

SecurityAttribute

CodeAccessSecurityAttribute

MediaPermissionAttribute

Attributes

AttributeUsageAttribute ObsoleteAttribute

Examples

The following example shows how to demand that the calling code has unrestricted MediaPermissionAudio at link time. Demands are typically made in managed libraries (DLLs) to help protect methods or classes from potentially harmful code.

[MediaPermissionAttribute(SecurityAction.Demand, Audio = MediaPermissionAudio.AllAudio)]

<MediaPermissionAttribute(SecurityAction.Demand, Audio:=MediaPermissionAudio.AllAudio)>
Public Sub Method01()
End Sub

Remarks

Caution

Code Access Security (CAS) has been deprecated across all versions of .NET Framework and .NET. Recent versions of .NET do not honor CAS annotations and produce errors if CAS-related APIs are used. Developers should seek alternative means of accomplishing security tasks.

MediaPermissionAttribute controls the ability for audio, image, and video media to work in a partial-trust Windows Presentation Foundation (WPF) application. The scope of the declaration that is allowed depends on the SecurityAction that is used.

The security information declared by a security attribute is stored in the metadata of the attribute target and is accessed by the system at run time. Security attributes are used only for declarative security. For imperative security, use the corresponding permission class, MediaPermission.

Constructors

MediaPermissionAttribute(SecurityAction)

Initializes a new instance of MediaPermissionAttribute.

Properties

Action	Gets or sets a security action. (Inherited from SecurityAttribute)
Audio	Gets or sets the audio permission level for the MediaPermissionAttribute.
Image	Gets or sets the image permission level for the MediaPermissionAttribute.
TypeId	When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute)
Unrestricted	Gets or sets a value indicating whether full (unrestricted) permission to the resource protected by the attribute is declared. (Inherited from SecurityAttribute)
Video	Gets or sets the video permission level for the MediaPermissionAttribute.

Methods

CreatePermission()	Creates and returns a new MediaPermission.
Equals(Object)	Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute)
GetHashCode()	Returns the hash code for this instance. (Inherited from Attribute)
GetType()	Gets the Type of the current instance. (Inherited from Object)
IsDefaultAttribute()	When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute)
Match(Object)	When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)

See also

• Extending Metadata Using Attributes