error handing in dot net core

Question

how to return Exception in dot net core 3.0 my return type is IActionResult

Ganesan C · Answer

If you are developing the API then use status code and description to response body. public ActionResult GetData() { try { // Your logic return new ContentResult() { Content = "" , //Your Success Message Body StatusCode = ( int )HttpStatusCode.OK }; } catch (Exception ex) { return new ContentResult() { Content = "" , //Your Failture or Exception Message Body StatusCode = ( int )HttpStatusCode.InternalServerError // Or use any other status code }; } }

Sachin Singh · Answer

you can just use the middleware. public class ErrorController : Controller { [Route( "Error/{StatusCode}" )] public IActionResult Index( int StatusCode) { switch (StatusCode) { case 404: ViewBag.Message = "404 error" ; break ; case 500: ViewBag.Message = "500 error" ; break ; } return View(); // index view } [AllowAnonymous] [Route( "Error" )] public IActionResult Error() { // Retrieve the exception Details var exceptionHandlerPathFeature = HttpContext.Features.Get (); ViewBag.ExceptionPath = exceptionHandlerPathFeature.Path; ViewBag.ExceptionMessage = exceptionHandlerPathFeature.Error.Message; ViewBag.StackTrace = exceptionHandlerPathFeature.Error.StackTrace; return View( "Error" ); // error view } } Error view Exception Details: class = "alert alert-danger" > Exception Path @ViewBag.ExceptionPath class = "alert alert-danger" > Exception Message @ViewBag.ExceptionMessage class = "alert alert-danger" > Exception Stack Trace @ViewBag.StackTrace index view @ViewBag.Message // middleware setup public void Configure(IApplicationBuilder app, IWebHostEnvironment env) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler( "/Error" ); } app.UseStatusCodePagesWithRedirects( "/Error/{0}" ); app.UseStaticFiles(); app.UseMvc(configureRoutes => { configureRoutes.MapRoute( "default" , "{Controller=Home}/{Action=Index}/{id?}" ); }); }

Jay Krishna Reddy · Answer

Hi, you can use the status codes that can accept the IActionResult method in.Net core, Please go through the below link to know the status codes to handle the exceptions in return type https://developer.mozilla.org/en-US/docs/Web/HTTP/Status