Determines whether the specified command can be executed. The class implementing this interface can use any required method to check the command. It is recommended to use the Tag property to identify a command.
Parameters
Name
Description
command
The command that is requested.
commandParameter
The command parameter.
Returns
true if the specified command can be excecuted; otherwise,false.
Remarks
TheCanExecute state of a command is queried a lot. The command itself does not cache any results because it is not aware of role or identity changes. If caching is required, this must be implemented in the class implementing the IAuthenticationProvider interface.a
Determines whether the user has access to the specified element. This method is invoked by theAuthentication behavior, and can be used to disable or hide UI elements based on a role or any other authentication mechanism. This method will only be called for UI elements with theAuthentication behavior.
Parameters
Name
Description
element
The element.
tag
The tag, retrieved fromFrameworkElement.Tag.
authenticationTag
The authentication tag specified by the calling object.
Returns
true if the user has access to the specified UI element; otherwise,false.
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