HI all my code is this

 dr["AcademicYear"] = ddlAcademic.SelectedItem.Text.ToString();

where datatype of : AcademicYear=varchar(50);

                               ddlAcademic.SelectedItem.Text.ToString(); ="2008-09"

          and m getting following exception

Cannot perform '=' operation on System.String and System.Int32

 can you double check your field type? And what are you trying to do here?

Ya i have Octa check the field type.

I am trying to update datarow of datatable which contain field "AcademicYear"

interestingly same thing goes perfect in insert operation.