Simple question on constructor

[DBC User]

I have 2 constructors in my class, first one with no paramter and the
second one is with a paramter. I want the later constructor to use the
first constructor and do some more with the parameter. How can I do
this?

eg:

public const()
{
//do base work
}

public const(string data)
{
//do base work --- Here is where I want to reuse the default
constructor
path = data;
}

It is a simple one but somehow I am not getting it correct.

Thanks.

 

[James Swindell]

You can do this in one to two ways:

1. Call the base constructor (parameterless) one from the additional one:

public const(string data) : this()
{
}

or,

2. Call the additional constructor from the base one with a default value
(probably null ???):

public const() : this(null)
{
}

James

 

[Peter Duniho]

I have 2 constructors in my class, first one with no paramter and the
second one is with a paramter. I want the later constructor to use the
first constructor and do some more with the parameter. How can I do
this?

IMHO, it is better to have the parameterless constructor call the one with
parameters, passing a default value. For example:

public const() : this("default string")
{
}

public const(string data)
{
}

(ignoring for the moment that I would never call a class "const" ).

Pete

 

[Jon Skeet [C# MVP]]

I have 2 constructors in my class, first one with no paramter and the
second one is with a paramter. I want the later constructor to use the
first constructor and do some more with the parameter. How can I do
this?

See http://pobox.com/~skeet/csharp/constructors.html

(And I agree with Peter - make all the "simple" constructors call the
most complex one.)

 

[Marc Gravell]

public const(string data) : this() {...}

Marc