Conditional ?:

Jammer 0

Hi, Is there any way to get the following to work?

bool s = _myProperty == true ? Method1() : Method2();

Or is this just silly talk? :)

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Ian McCaul

Yes so long as the return types of Method1/2 are bool also.

S Senthil Kumar

Jammer wrote:

bool s = _myProperty == true ? Method1() : Method2();

Why doesn't it work? It should, as long as Method1() and Method2() return bool, or return types convertible to each other and to bool.

Regards Senthil [MVP - Visual C#] _____________________________ My Home Page |My Blog | My Articles | My Flickr | WinMacro

Mel Feik

I believe they (method1/2) would also have to be static (?)

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Ian McCaul

Only unless the method that is using this code is also static... otherwise they dont need to be. From the looks he is testing an internal variable so chances are it wont be static. Edit: But it could be static even if it wasnt static... could go either way.

Abhijit Jana

Jammer wrote:

Is there any way to get the following to work? bool s = _myProperty == true ? Method1() : Method2();

It should work, if both Method1 and Method2 are static and retrun a Bool value.

cheers, Abhijit CodeProject MVP Web Site:abhijitjana.net

S Senthil Kumar

I don't get it, why should the methods be static?

Regards Senthil [MVP - Visual C#] _____________________________ My Home Page |My Blog | My Articles | My Flickr | WinMacro

Luc Pattyn

yes

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Ian McCaul

They dont need to be as I said earlier... i.e.

class Conditional
{
private bool _myProperty;

public bool MyProperty
{
get { return _myProperty; }
set { _myProperty = value; }
}

public bool DoSomething()
{
bool s = _myProperty == true ? Method1() : Method2();
return s;
}

public bool Method1()
{
return true;
}

public bool Method2()
{
return false;
}
}

Mel Feik

sorry on that - I had another issue on my mind when I read the question and posted that. I just thought of how I would stick that in a console app - where method1 & 2 were helpers to Main (ie. methods in the Program class) - in which case static would be required. But on considering.. should have just posted my own question quietly.

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Vikram A Punathambekar

S. Senthil Kumar wrote:

or return types convertible to each other and to bool

Good lord, I still remember that post on your blog. I asked a few people, and nobody knew it! I wonder why they made that restriction. :~

Cheers, Vikram.

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Jammer 0

Hi, I see ... the problem was the methods are void return types. Can this be used with void? Cheers,

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S Senthil Kumar

No, the expression containing the ternary operator must be of some type. If both the methods take no parameters, this will work

Action result = p ? new Action(M1) : new Action(M2);
result();

Regards Senthil [MVP - Visual C#] _____________________________ My Home Page |My Blog | My Articles | My Flickr | WinMacro