使用 InnerException 抛出异常 c#

Question

I'm working on code that store Exception.InnerException to db:

try
{        
    // what should I throw here?
}
catch (Exception ex)
{
    errorService.Save(ex.InnerException);
}

What exception (type of exception) should I throw to check my code?

Answer 1

throw new ArgumentException(); // what should I throw here?

This example isn't very clear, an ArgumentException will rarely have an innerexception. But when you really want to:

 new ArgumentException("parameter-name", previouseException);

or maybe

new Exception("I'm just a wrapper", new ArgumentException("parameter-name"));

During the handling part, what if there is no InnerException, or the InnerException again has an InnerException?

What you probably want:

catch (Exception ex)
{
    while(ex.InnerException != null)  ex = ex.InnerException;
    errorService.Save(ex);
    // throw; here unless you're very sure about handling everything 
}