Forgot Syntax: calling a parameterized constructor of the same class from a non-parameterized one

[Sathyaish]

/* I am writing this C# program because I forgot the syntax for
calling a parameterized constructor from a non-parameterized one
within the same class.

I was coding in Java and just typed it like this:

public MyClass(String someParam)
{
}

public MyClass()
{
this.MyClass("Someparam");
}

The compiler complained and I remembered it was like this in Java:

public MyClass()
{
this("Someparam");
}

This led me to think that I am forgetting the way it is done in C#
and that my mistake was influenced by the way it is done in C#. Just
so that I do not forget how to do it in C#, I am writing this small
spike solution as a reminder.

I have now tried

this.MyClass("SomeParam");
MyClass("SomeParam"); and
this("SomeParam");

None of them seem to work. What's the correct way. I realize I have
forgotten the correct way.

*/

 

[Sathyaish]

OK. RESOLVED.

It is

new SomeClass("SomeParam");


Got it.

 

[Tom Porterfield]

OK. RESOLVED.

It is

new SomeClass("SomeParam");

Got it.

Test that and you'll see it isn't doing what you want. See my reply to your
original.

 

[Tom Porterfield]

/* I am writing this C# program because I forgot the syntax for
calling a parameterized constructor from a non-parameterized one
within the same class.

I was coding in Java and just typed it like this:

public MyClass(String someParam)
{
}

public MyClass()
{
this.MyClass("Someparam");
}

The compiler complained and I remembered it was like this in Java:

public MyClass()
{
this("Someparam");
}

What you want is:

public MyClass() : this ("Someparam")
{
}

 

[Jon Skeet [C# MVP]]

/* I am writing this C# program because I forgot the syntax for
calling a parameterized constructor from a non-parameterized one
within the same class.

I was coding in Java and just typed it like this:

<snip>

See http://pobox.com/~skeet/csharp/constructors.html for this - along
with other differences between Java and C# when it comes to
constructors.

Jon

 

[Sathyaish]

Thanks, Tom and Jon.

Ah! That was it. Thank you for the reminder, Tom. What I did earlier
was create a new object of the same class from an object of itself.