Wednesday, July 14, 2010

C# extension method similar to Sql's IN operator

Consider the code snippet below
if(a == x || a == y || a == z)

We can re-write this expression as:
  • Using array's contains
 if( new [] {x,y,z}.Contains(a))
  • Using a similar syntax for the SQL's IN operator by using extension
public bool IsIn(this T obj, params T[] collection) {
   return collection.Contains(obj);
And invoke as
if(a.IsIn(b, c, d)) { ... }

Read more at Stackoverflow

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