Question

I have the following code, and I’m wondering if there’s a more succinct, reduced way to write this code:

(FontStyle is a .NET Enum with the Flags attribute)

lblPrompt.Font.Style = FontStyle.Regular;

if (chkBold.Checked)
    lblPrompt.Font.Style |= FontStyle.Bold;
if (chkItalics.Checked)
    lblPrompt.Font.Style |= FontStyle.Italic;
if (chkUnderline.Checked)
    lblPrompt.Font.Style |= FontStyle.Underline;

I have a feeling the answer lies in correctly applying the and & operator between CheckBox.Checked and the desired flag, similar to the following:

lblPrompt.Font.Style =
    (chkBold.Checked & FontStyle.Bold)
    | (chkItalics.Checked & FontStyle.Italic)
    | (chkUnderline.Checked & FontStyle.Underline);

This does not work however because the compiler apparently does not like my direct application of the ampersand with a bool and a Flag/Enum type.

Answer 1

How about something along these lines:

lblPrompt.Font.Style |=
    (chkBold.Checked ? FontStyle.Bold : 0)
    | (chkItalics.Checked ? FontStyle.Italic : 0)
    | (chkUnderline.Checked ?  FontStyle.Underline : 0);