Comparing a variable to multiple values [duplicate]

Question

Quite often in my code I need to compare a variable to several values :

if ( type == BillType.Bill || type == BillType.Payment || type == BillType.Receipt ) {   // Do stuff } 

I keep on thinking I can do :

if ( type in ( BillType.Bill, BillType.Payment, BillType.Receipt ) ) {    // Do stuff } 

But of course thats SQL that allows this.

Is there a tidier way in C#?

Answer 1

You could do with with .Contains like this:

if (new[] { BillType.Receipt, BillType.Bill, BillType.Payment}.Contains(type)) {} 

Or, create your own extension method that does it with a more readable syntax

public static class MyExtensions {     public static bool IsIn<T>(this T @this, params T[] possibles)     {         return possibles.Contains(@this);     } } 

Then call it by:

if (type.IsIn(BillType.Receipt, BillType.Bill, BillType.Payment)) {} 

Answer 2

There's also the switch statement

switch(type) {     case BillType.Bill:     case BillType.Payment:     case BillType.Receipt:         // Do stuff         break; }