Web Api Exception Handling

Question

In my app I am trying to use Exception handling. What I am trying to do is to create a separate class and extend it from HttpResponseException.

This is the code I have written until now,

public class ApiExceptions : HttpResponseException
{
    public ApiExceptions(string reason, HttpStatusCode code)
    {
        var response = new HttpResponseMessage
        {
            StatusCode = code,
            ReasonPhrase = reason,
            Content = new StringContent(reason)
        };
        throw new HttpResponseException(response);
    }
}

But I am getting this error,

'System.Web.Http.HttpResponseException' does not contain a constructor that takes 0 arguments

I am really new at exception handling in c#. I would really appreciate the help in this regard.

Emmanuel M. · Accepted Answer · 2015-02-25 14:00:52Z

3

the following code should works

: base(...)

If you omit the call to a base constructor it will call the default base constructor automatically and HttpResponseException doesn't have without arguments.

 public class ApiExceptions : HttpResponseException
        {
            public ApiExceptions(string reason, HttpStatusCode code):base(code)
            {
                var response = new HttpResponseMessage
                {
                    StatusCode = code,
                    ReasonPhrase = reason,
                    Content = new StringContent(reason)
                };
                throw new HttpResponseException(response);
            }
        }

anyway i'm not sure why you need to extend HttpResponseException

answered Feb 25, 2015 at 14:00

Emmanuel M.

4416 silver badges11 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

drewmerk Over a year ago

This is a great solution. Anyone using this in production should add a check that the reason string is not greater than 512 characters in length. stackoverflow.com/a/4877267/3761486

stuartd · Accepted Answer · 2015-02-25 13:46:55Z

3

The HttpResponseException class has two constructors defined, both of which require a value:

HttpResponseException(HttpResponseMessage)
HttpResponseException(HttpStatusCode)

Because your ApiExceptions class inherits from HttpResponseException, it has to provide a compatible constructor. As all the class does is return the HttpResponseException, it doesn't seem necessary for it to inherit from that class at all.

answered Feb 25, 2015 at 13:46

stuartd

73.7k16 gold badges139 silver badges172 bronze badges

3 Comments

mohsinali1317 Over a year ago

can you provide an example on how to extend that class?

stuartd Over a year ago

Why do you need to extend the class?

mohsinali1317 Over a year ago

now that I am thinking it feels like I don't need it.

freedeveloper · Accepted Answer · 2016-08-11 05:00:20Z

If you want to derived form HttpResponseException you should use a code similar to this: In the example is a customize exception that return BadRequest type exception and a custom message.

 public class HttpResponseBadRequestException: HttpResponseException
{
    /// <summary>
    /// Basic
    /// </summary>
    public HttpResponseBadRequestException()
        : this(string.Empty)
    {
    }

    /// <summary>
    /// Specific Constructor. Use this to send a Bad request exception
    /// with a custom message
    /// </summary>
    /// <param name="message">The message to be send in the response</param>
    public HttpResponseBadRequestException(string message)
        : base(new HttpResponseMessage(HttpStatusCode.BadRequest) {
            Content = new StringContent(message) })
    {
    }
}

Collectives™ on Stack Overflow

Web Api Exception Handling

3 Answers 3

1 Comment

3 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related