In Asp.net Quick Wayto Filling a DataTable or DataSet the

private DataTable GetDataTable()

    {

        string sql = "SELECT recID,Main_Node_Name,IsActive from  ea_treeview";

        using (SqlConnection myConnection = new SqlConnection(connectionString))

        {

            using (SqlCommand myCommand = new SqlCommand(sql, myConnection))

            {

                myConnection.Open();

                using (SqlDataReader myReader = myCommand.ExecuteReader())

                {

                    DataTable myTable = new DataTable();

                    myTable.Load(myReader);                  

                    return myTable;

                }

            }

        }

    }