Question

I’m using a LINQ query on a DataTable where a data field may be a bool (true/false) or an int (1/0). The LINQ query asks for a type for the Field method and if the data field differs, an InvalidCastException is thrown (which cannot be caught).

   var query =
   from tbl12 in t12.AsEnumerable()
   where tbl12.Field<int>("theField") == 0
   select new { T12 = tbl12 };

or

   var query =
   from tbl12 in t12.AsEnumerable()
   where tbl12.Field<bool>("theField") == false
   select new { T12 = tbl12 };

How can I get around this? I want to filter results where the field = false or 0.

Answer 1

I have found the answer: set the type as object and use the ToString() method on the field.

ie:

   var query =
   from tbl12 in t12.AsEnumerable()
   where tbl12.Field<object>("theField").ToString() == "false" || tbl12.Field<object>("theField").ToString() == "0"
   select new { T12 = tbl12 };