Question

I have a problem with LINQ (in C#). I need to order a list of records by a field, which should be int, but sometimes not :

from MyObject obj in new MyObject()
where obj.Visibile=="1"
orderby Int32.Parse(obj.Order) ascending
select obj;

and, as I said, if obj.Order is it not int, I get an error : System.FormatException: Input string was not in a correct format.

I’d like to put the non-int items at the end of the list, without get any error. Is it possible?

Answer 1

Try by maming use of TryParse

int myInt;                
from obj in MYobjects
         where obj.Visibile=="1" 
         orderby  (int.TryParse(Str, out myInt) ?  myInt: 0 )
         select obj;

OR

MYobjects.OrderBy(r => Number(r.str);
 //private function 
int Number(string str) 
{ 
        int result_ignored;
        if (int.TryParse(str,out result_ignored))
           return result_ignored;

        else 
           return 0;
 }