c# - Exclude certain values from a numeric up down -

i using c# vs2013 in .net 4.5.2.

basically, have numeric updown user can select values from. however, selectable values 1, 2, 3, 4, 6, 12, , multiples of 24. there can that, or simpler have combobox?

you can create custom numericupdown this

class customnumericupdown : numericupdown {     private int currentindex = 0;     private decimal[] possiblevalues = null;     public decimal[] possiblevalues     {                 {             if (possiblevalues == null)             {                 possiblevalues = getpossiblevalues().toarray();             }             return possiblevalues;         }     }      public override void upbutton()     {         if (base.useredit)         {             this.parseedittext();         }         var values = possiblevalues;         this.currentindex = math.min(this.currentindex + 1, values.length - 1);         this.value = values[this.currentindex];     }      public override void downbutton()     {         if (base.useredit)         {             this.parseedittext();         }         var values = possiblevalues;         this.currentindex = math.max(this.currentindex - 1, 0);         this.value = values[this.currentindex];     }      private ienumerable<decimal> getpossiblevalues()     {         foreach (var value in new decimal[] { 1, 2, 3, 4, 6, 12 })         {             yield return value;         }         (decimal = 24; < maximum; += 24)         {             yield return i;         }     } } 

note: screws acceleration feature. , needs more effort respond maximum property changed during runtime.

also worth noting if maximum value large, create huge array. small values fine. rid of array need own state machine implementation.