Any better way to use if else statement while using an “using” block statement?

Question

I have a scenario where I have two new objects in which only one has to be initialized according to the condition.

But I am using the “using” block statement for initializing a new object.

How can I achieve it? Please refer the below scenario.

int a;
string b;

if()//some codition
{
    using(MyClass c1 = new MyClass(a))
    { 
            SomeMethod();
    }
}
else
{
    using(MyClass c1 = new MyClass(b)
    {
             SomeMethod();
    }
}

Is there any better way to achieve this in single condition or any other way to reduce the code? because I am calling the same method in both condition.

Thanks in advance.

Regards, Anish

You can using(MyClass c1 = new MyClass(condition ? a : b)). — Alessandro D'Andria
– Alessandro D'Andria, Commented Mar 1, 2017 at 8:48
@AlessandroD'Andria a and b are different types, so the ternary operator won't compile against those directly. — Adam Houldsworth
– Adam Houldsworth, Commented Mar 1, 2017 at 8:51

ivayle · Accepted Answer · 2017-03-01 09:08:42Z

6

You can use Conditional (Ternary) Operator.

int a;
string b;

using(MyClass c1 = (some condition) ? new MyClass(a) : new MyClass(b))
{
    SomeMethod();
}

edited Mar 1, 2017 at 9:08

ivayle

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answered Mar 1, 2017 at 8:49

Vijay

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5 Comments

ProgrammingLlama Over a year ago

It's called a conditional ternary operator: msdn.microsoft.com/en-us/library/zakwfxx4(v=vs.100).aspx

Adam Houldsworth Over a year ago

+1 for being the only one to spot that a and b are different types so can't satisfy the ternary operator on their own.

Damien_The_Unbeliever Over a year ago

@john - no, it's called the conditional operator. Some people choose to call it ternary because most languages only contain one ternary operator and it's the conditional operator.

Adam Houldsworth Over a year ago

@Damien_The_Unbeliever Oddly enough I call it the ternary operator but I have no prior experience with it from other languages lol, I must've just cottoned on to someone else calling it that for that very reason.

ProgrammingLlama Over a year ago

@Damien_The_Unbeliever I've updated my comment as per MSDN :) I was attempting to change it from "ternary if", but failed with my edit slightly.

Matthew Watson · Accepted Answer · 2017-03-01 08:55:10Z

2

How about:

using (var c1 = condition ? new MyClass(a) : new MyClass(b))
{
    SomeMethod();
}

edited Mar 1, 2017 at 8:55

answered Mar 1, 2017 at 8:48

Matthew Watson

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Comments

Kay Lee · Accepted Answer · 2017-03-01 16:23:46Z

2

Is there any better way to achieve this in single condition or any other way to reduce the code?

Yes, you can.

using (MyClass c1 = condition ? new MyClass(a) : new MyClass(b))
{
    SomeMethod();
}

?: is a Ternary operator which as the name suggests, works on 3 operands.

edited Mar 1, 2017 at 16:23

Kay Lee

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answered Mar 1, 2017 at 8:48

Nikhil Agrawal

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Comments

Caspar Kleijne · Accepted Answer · 2017-03-01 08:59:43Z

1

  IDisposable target = somecondition ?  new MyClass(a)  : new MyClass(b) ;
  using (IDisposable c1 = target )
  {
                SomeMethod();
  }

edited Mar 1, 2017 at 8:59

answered Mar 1, 2017 at 8:49

Caspar Kleijne

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1 Comment

Vijay Over a year ago

a and b are of different type.

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