UnhandledExceptionFilter Event

Occurs when a thread exception is thrown and uncaught during execution of a delegate by way of Invoke(Action) or InvokeAsync(Action) when in the filter stage.

Definition

Namespace: Avalonia.Threading
Assembly: Avalonia.Base (in Avalonia.Base.dll)

C#

public event DispatcherUnhandledExceptionFilterEventHandler UnhandledExceptionFilter

VB

Public Event UnhandledExceptionFilter As DispatcherUnhandledExceptionFilterEventHandler

F#

member UnhandledExceptionFilter : IEvent<DispatcherUnhandledExceptionFilterEventHandler,
    DispatcherUnhandledExceptionFilterEventArgs>

View Source

Value

DispatcherUnhandledExceptionFilterEventHandler

Remarks

This event is raised during the filter stage for an exception that is raised during execution of a delegate by way of Invoke(Action) or InvokeAsync(Action) and is uncaught. The call stack is not unwound at this point (first-chance exception). Event handlers for this event must be written with care to avoid creating secondary exceptions and to catch any that occur. It is recommended to avoid allocating memory or doing any resource intensive operations in the handler. The UnhandledExceptionFilter event provides a means to not raise the UnhandledException event. The UnhandledExceptionFilter event is raised first, and If RequestCatch is set to false, the UnhandledException event will not be raised.

See Also

Reference

Dispatcher Class
Avalonia.Threading Namespace