How to use object initializers with using statements?

Question

Is there any way to refactor this code to not have to use a temporary variable and still use the syntactic sugar associated with object initializers?

FrmSomeForm someTempForm = new FrmSomeForm()
{
    SomePropA = "A",
    SomePropB = "B",
    SomePropC = "C"
};
using (FrmSomeForm someForm = someTempForm)
{
    someForm.ShowDialog();
}

You can do a basic substitution of the `new` code block into the parentheses, but it's much cleaner the way you have it now. — Robert Harvey, Oct 16 '12 at 19:54

Dmytro · Accepted Answer · 2012-10-17T09:33:30.933

5

using (FrmSomeForm someForm = new FrmSomeForm(){
    SomePropA = "A",
    SomePropB = "B",
    SomePropC = "C"
})
{
    someForm.ShowDialog();
}

doesn't this work? oO

edited Oct 17 '12 at 09:33

answered Oct 16 '12 at 19:54

Dmytro

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score 5 · Answer 2 · answered Oct 16 '12 at 19:56

5

using (FrmSomeForm someForm = new FrmSomeForm())
{
    someForm.SomePropA = "A";
    someForm.SomePropB = "B";
    someForm.SomePropC = "C";
    someForm.ShowDialog();
}

I think that is the simplest way and even the more readable in my opinion ...

Keep things simple :-)

answered Oct 16 '12 at 19:56

aleroot

71,077
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That doesn't use object initializers though. – Andrew Oct 16 '12 at 19:58
1

@AndrewMartin The point of this answer is that you shouldn't, and don't need to. As the other answers demonstrate, using it produces worse code. – Servy Oct 16 '12 at 19:59
Yeah I think I like this one better than the object initializers. – Ryan Peschel Oct 16 '12 at 20:02

score 3 · Answer 3 · answered Oct 16 '12 at 19:55

Try:

        using (FrmSomeForm someForm = new FrmSomeForm()
                        {
                            SomePropA = "A",
                            SomePropB = "B",
                            SomePropC = "C"
                        })
        {
            someForm.ShowDialog();
        }

score 0 · Answer 4 · answered Oct 16 '12 at 19:55

using (FrmSomeForm someForm = new FrmSomeForm()
    {
        SomePropA = "A",
        SomePropB = "B",
        SomePropC = "C"
    })
{
    someForm.ShowDialog();
}

If you don't like the formatting, you can do something like this:

using (FrmSomeForm someForm = new FrmSomeForm() { SomePropA = "A", SomePropB = "B", SomePropC = "C" })
{
    someForm.ShowDialog();
}

Or:

private FrmSomeForm InitFrmSomeForm()  
{
    return new FrmSomeForm()
    {
        SomePropA = "A",
        SomePropB = "B",
        SomePropC = "C"
    };
}

using (FrmSomeForm someForm = InitFrmSomeForm())
{
    someForm.ShowDialog();
}

score 0 · Answer 5 · answered Oct 16 '12 at 19:57

0

You can do it like this

using 
(
    FrmSomeForm someForm = new FrmSomeForm()
    {
        SomePropA = "A",
        SomePropB = "B",
        SomePropC = "C"
    }
)
{
     someForm.ShowDialog();
}

answered Oct 16 '12 at 19:57

Andrew

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8
17

How to use object initializers with using statements?

5 Answers5

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