Exception handling in async Methods MVC. How to use try catch for method called using await?

Question

     [HttpPost]
 public async Task<JsonResult>    
    {
     await sendNotification(responce);
    }

I want to catch exception occured in sendnotification method. How can I call the same using Task.Factory ??

The caller needs to handle the exceptions - they are wrapped by the Task and sent back in the result (check Task.Result). Obviously you can try/catch inside the method and throw the appropriate exception — Charleh
– Charleh, Commented Apr 15, 2014 at 8:51

Stephen Cleary · Accepted Answer · 2014-04-15 09:37:44Z

2

You just write a try/catch block, as such:

[HttpPost]
public async Task<JsonResult>    
{
  try
  {
    await sendNotification(responce);
  }
  catch (Exception ex)
  {
    ...
  }
}

You don't need Task.Factory for this.

answered Apr 15, 2014 at 9:37

Stephen Cleary

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2 Comments

simbolo Over a year ago

I do this but nothing happens, the exception that is thrown is a Microsoft.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) and any evidence of the real exception is lost as inner exception is null.

Stephen Cleary Over a year ago

@simbolo: Please post a repro and the exception details as a separate question.

Prashanth Reddy · Accepted Answer · 2015-09-16 07:13:46Z

0

Exception Handling of sendNotification() task depends on how the task is coded. In one way, above Stephen Cleary's answer is right but not sure it fixes your issue.

You can go through below easy understandable articles to understand Exception Handling in Async programming...

Basic exception handling in Asynchronious programming in C#.

Exception object behaves differently while handling exceptions in parallel tasks in Asynchronous programming.

answered Sep 16, 2015 at 7:13

Prashanth Reddy

1

1 Comment

Jérémie Bertrand Over a year ago

Welcome to Stack Overflow! Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.

Prashanth Reddy · Accepted Answer · 2015-09-16 07:17:38Z

0

Also look into below link..

Handling the AggregateException using Handle method in Asynchronous programming.

answered Sep 16, 2015 at 7:17

Prashanth Reddy

1

1 Comment

Guillaume Fache Over a year ago

Please avoid link only answers, they have no value if link get broken.

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