Question

The following query complains that the int conversion is not supported.

var list = from d in data
           where d.Id == (int)GridView1.DataKeys[0].Value
           select d;

It complains on the (int)GridView1.SelectedInex line telling me that the Int conversion is not supported. I also tried Convert.ToInt32, but that did not work either.

Is this logic that has to be calculated before such as above the linq query or is there a special way to do it and if not, why does it not support it?

Answer 1

Why not try and parse the value to an integer before hand, it’s not needed in the query.

Int id;
if (Int32.TryParse(ridView1.DataKeys[0].Value.ToString(), out id))
{
    var list = from d in data
               where d.Id == id
               select d;
}