error handing in dot net core

how to return Exception in dot net core 3.0

my return type is IActionResult

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
};
}
}

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

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

3 Replies

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Ganesan C5y ago
Accepted 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
        };

    }
}
+2
Sachin Singh5y ago
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

error handing in dot net core

Exception Details:

Exception Path

Exception Message

Exception Stack Trace