Error handling in Blazor server Razor Component

Question

How to handle unahandled exceptions in blazor server razor component, In page model, I'm handling with try catch block, but some errors come from razor file and the circuit breaks, application stops. Kindly suggest me the solution to handle this.

Blazor, by default, shows a yellow line at the bottom of the page if any unhandled exception occurs. What do you want to do with this error? — u1986237

user13256346 user13256346 · Accepted Answer · 2021-01-08T14:00:04

I read alot about this issue and what I found that there is no way to make a global error handling right now for blazor, you can handle the error that related with http request like this:

if (!response.IsSuccessStatusCode)
        {
            var statusCode = response.StatusCode;
            switch (statusCode)
            {
                case HttpStatusCode.NotFound: _navigation.NavigateTo("/Notfound", true);
                    break;
                case HttpStatusCode.Unauthorized: _navigation.NavigateTo("/Error");
                    break;
                default: _navigation.NavigateTo("/Error");
                    break;
            }
            throw new ApplicationException($"Reason: {response.ReasonPhrase}");
        }

You need also to be carefull about using try catch inside blazor component with some proberty [inject] becuase maybe your blazor circuit will fail!. You can read more about that in microsoft documents and correct if I am wrong.

Error handling in Blazor server Razor Component

1 Answers