How to insert data from DataGridView by Store Procedure

private void btnSave_Click(object sender, EventArgs e)
       {
           //MessageBox.Show(grStudentAttend.Rows.Count.ToString());
           //int count = grStudentAttend.Rows.Count;
           try
           {
               for (int i = 0; i < grStudentAttend.Rows.Count -1; i++)
               {
                   db.command.Parameters.Add("@StudentName", SqlDbType.VarChar).Value =grStudentAttend.Rows[i].Cells[0].Value.ToString();
                   db.command.Parameters.Add("@Roll", SqlDbType.VarChar).Value = grStudentAttend.Rows[i].Cells[1].Value.ToString();
                   db.command.Parameters.Add("@Class", SqlDbType.VarChar).Value = comClass.Text.ToString();
                   db.command.Parameters.Add("@Shift", SqlDbType.VarChar).Value = cmShift.Text.ToString();
                   db.command.Parameters.Add("@Section", SqlDbType.VarChar).Value = cmSection.Text.ToString();
                   db.command.Parameters.Add("@Dated", SqlDbType.SmallDateTime).Value = Convert.ToDateTime(dateTimePicker1.Text.ToString());
                   db.command.Parameters.Add("@YearAt", SqlDbType.VarChar).Value = dateTimeYear.Text.ToString();
                   db.command.Parameters.Add("@MonthAt", SqlDbType.VarChar).Value = comMonth.Text.ToString();
                   if (DBNull.Value.Equals(grStudentAttend.Rows[i].Cells[2].Value) || grStudentAttend.Rows[i].Cells[2].Value.ToString() == "false")
                   {
                       db.command.Parameters.Add("@Attend", SqlDbType.Bit).Value = 0;
                       //db.Adapter("sp_InsertStudentAttendance", true);
                       //MessageBox.Show("Keep Attendance complete");

                   }
                   else
                       db.command.Parameters.Add("@Attend", SqlDbType.Bit).Value = 1;
                   db.Adapter("sp_InsertStudentAttendance", true);
                   MessageBox.Show("Keep Attendance complete");
               }
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message);
           }
       }