private bool checkIsRowSelected(DataGridView dg)
        {            
            bool isRowSelected = false;
            //Loop through each row of datagridview
            foreach (DataGridViewRow check in dg.Rows)
            {
                //Assume first column is checkbox column
                if (check.Cells[0].Value != null)
                {
                    //Get the value in a string
                    string chkValue = check.Cells[0].Value.ToString();
                    if (chkValue != "0" && chkValue != "False")
                    {
                        //if any of the row is selected, change the value of bool variable
                        isRowSelected = true;
                        break;
                    }
                }
            }
            //return the value
            return isRowSelected;
        }