Get the current exception in blazor Error Boundary

Question

I have an exception that has been generated in a certain context of my application. I would like to be able to collect it, send it to the logger and recover the previous state.

The problem is that this error-bound exception cannot be accessed since its current exception property is protected.

What would be the solution?

Answer 1

I had the same problem and after investigating the source code it was easy to get the current exception from ErrorContent of the ErrorBoundary.

<ErrorBoundary>
                    <ChildContent>
                        @Body
                    </ChildContent>
                    <ErrorContent Context="Exception">
                        <div>
                             @Exception.Message<br/>
                        </div>
                    </ErrorContent>
                </ErrorBoundary>

Get the current exception from the Context (RenderFragment) of ErrorContent (see above code example).

ErrorBoundaryBase ->

/// <summary>
    /// The content to be displayed when there is an error.
    /// </summary>
    [Parameter] public RenderFragment<Exception>? ErrorContent { get; set; }