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implementing Custom handling Handling in ASP.NET Core - Middleware Not Capturing All Errors

👀 Views: 24 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-05
asp.net-core exception-handling middleware C#

I'm relatively new to this, so bear with me. I'm working on a personal project and I've looked through the documentation and I'm still confused about I'm currently implementing a custom middleware in my ASP.NET Core 5 application for global exception handling..... However, it seems that not all exceptions are being captured by my middleware, particularly those thrown by third-party libraries. I've set up my middleware like this: ```csharp public class ErrorHandlingMiddleware { private readonly RequestDelegate _next; public ErrorHandlingMiddleware(RequestDelegate next) { _next = next; } public async Task InvokeAsync(HttpContext context) { try { await _next(context); } catch (Exception ex) { await HandleExceptionAsync(context, ex); } } private Task HandleExceptionAsync(HttpContext context, Exception ex) { // Log exception and return an behavior response context.Response.ContentType = "application/json"; context.Response.StatusCode = (int)HttpStatusCode.InternalServerError; var result = JsonConvert.SerializeObject(new { behavior = ex.Message }); return context.Response.WriteAsync(result); } } ``` I've registered this middleware in the `Configure` method of `Startup.cs` using: ```csharp app.UseMiddleware<ErrorHandlingMiddleware>(); ``` The question arises when I make a request that triggers an exception from a third-party library (like a failure during database access). For example, I get a `SqlException` when trying to retrieve data and it seems that the exception is not being caught by my middleware at all, resulting in the default ASP.NET Core behavior handling kicking in instead. I've tried wrapping calls to my database context in a try-catch block within my controller, but that didn't catch the exceptions either. Is there something I'm missing in terms of the order of middleware or how exceptions propagate? Any insights on how to ensure that all exceptions, including those from third-party libraries, are captured by my global handler would be greatly appreciated! Is there a better approach? This is part of a larger application I'm building. Any ideas what could be causing this? I'm open to any suggestions. I recently upgraded to C# stable. Is this even possible? How would you solve this?