สอบถามหน่อยครับพอดี ทำการ insert ใน gridControl Devxepress พอบันทึก มันลูปไม่หยุดเลย

private void btnadd_Click(object sender, EventArgs e)
        {
            try
            {
                for (int i = 0; i < gridView1.DataRowCount; i++)
                {

                    string name = Convert.ToString(gridView1.GetRowCellValue(i, "name"));
                    string Username = Convert.ToString(gridView1.GetRowCellValue(i, "Username"));
                    string Password = Convert.ToString(gridView1.GetRowCellValue(i, "Password"));

                    string sqluser = "INSERT INTO Login(name,Username,Password) VALUES('" + name + "' , '" + Username + "', '" + Password + "')";
                    connect_db.ExcuteData(sqluser);
                    showdgvmainuser();

                }
                MessageBox.Show("Successfully!");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
 
        }