MediaPermissionImage 枚举

定义

命名空间:
System.Security.Permissions
程序集:
System.Security.Permissions.dll
程序集:
WindowsBase.dll

注意

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

指定图像的权限级别。Specifies the permission level for images.

public enum class MediaPermissionImage
public enum MediaPermissionImage
[System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public enum MediaPermissionImage
type MediaPermissionImage = 
[<System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type MediaPermissionImage = 
Public Enum MediaPermissionImage
继承
Object
ValueType
Enum
MediaPermissionImage
属性
ObsoleteAttribute

字段

AllImage 3

允许显示不受限制图像的权限。Permission that allows unrestricted image display.
NoImage 0

拒绝显示所有图像的权限。Permission that denies all images to be displayed.
SafeImage 2

允许显示安全、有限制图像的权限，该权限包括拒绝对图像文件的流访问。Permission that allows safe, limited image display, which includes denying stream access to the image file.
SiteOfOriginImage 1

只允许显示位于应用程序源站点的图像的权限。Permission that only allows display of images that are located at the application's site of origin.

示例

下面的代码示例演示属性的用法 Image 。The following code example shows the use of the Image property.

[MediaPermissionAttribute(SecurityAction.Demand, Image = MediaPermissionImage.AllImage)]

<MediaPermissionAttribute(SecurityAction.Demand, Image:=MediaPermissionImage.AllImage)>
Public Sub Method05()
End Sub

注解

使用此枚举设置类的 Image 属性 MediaPermission 。Use this enumeration to set the Image property of the MediaPermission class. 默认值为 SafeImage。The default is SafeImage.

适用于