Foreach loop in GridView using C# in ASP.Net

hi,

Firstly here is my code,,

foreach (DataGridViewRow row in gridviewterm.Rows)
{
    bool isSelected = Convert.ToBoolean(row.Cells["Select_Term"].Value);
    if (isSelected)
    {
        message += Environment.NewLine;
        message = row.Cells["Term"].Value.ToString();
        getterm = message;

        for (int i = 0; i < checklistboxgrade.Items.Count; i++)
        {
            if (checklistboxgrade.GetItemChecked(i))
            {
                string str = (string)checklistboxgrade.Items[i]; //Or try  list1.Items[i].ToString();
                getselectedvalue = str;
                SqlCommand cmd2 = new SqlCommand("insert into Tbl_SubSubject_Master (Class,Subject,Term,Grading_Pattern) values('" + comboClass.Text + "','" + ComboSubject.Text + "','" + getterm + "','" + getselectedvalue + "')", con0);
                cmd2.CommandType = CommandType.Text;
                SqlDataReader reader = null;
                reader = cmd2.ExecuteReader();
                reader.Close();                             
            }
        }
    }
}



When i execute this code in First itteration all Works Fine But When Starts with 
second Itteration it goes on for loop instead of foreach loop
i want to execute it in the same way as the 1st itteration happen