nicedone
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i want to understand how c# class with 3 constructers with mismatching base parameters work
Hi,
In one of the projects that i work at i have come accross a class like below,
could yo help me how it works ? because i did not fully got how base can have 2 parameters but the constructer takes 3 and i did not fully understand the first 3 constructers using this how it works?
In one of the projects that i work at i have come accross a class like below,
could yo help me how it works ? because i did not fully got how base can have 2 parameters but the constructer takes 3 and i did not fully understand the first 3 constructers using this how it works?
public class CustomHttpException : Exception
{
public CustomHttpException(string message) : this(message, HttpStatusCode.InternalServerError, null) { }
public CustomHttpException(string message, Exception innerException) : this(message, HttpStatusCode.InternalServerError, innerException) { }
public CustomHttpException(string message, HttpStatusCode statusCode) : this(message, statusCode, null) { }
public CustomHttpException(string message, HttpStatusCode statusCode, Exception innerException)
: base(message, innerException)
{
StatusCode = statusCode;
}
public HttpStatusCode StatusCode { get; set; }
}SOLUTION
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for this line:
CustomHttpException x = new CustomHttpException ("some string");
only the first constructor can be taken, and it matches with the data types.
with this line of code, the compiler will check what type of object "some_exception" is:
CustomHttpException x = new CustomHttpException ("some string", some_exception);
if it is of type Exception, then the 2nd constructor is used
if it is of type HttpStatusCode , then the 3rd constructor is used
if its neither of the 2 types, a compile error will be returned
the last contructor is bascially just having 1 more argument, and using one of the of the other constructors + some function code to do the rest (what the other constructor is not doing)