Inserting new row into DataGridView nd Updating DB

private void frmCompanyExecutives_Load(object sender, EventArgs e)
{
  dal = new DataAccessLayer();
				
  try
    {
	// Get the List of CompanyExecutives from the DAL and bind to Datagrid 
	this.dgvCompanyExecutives.DataSource = dal.GetCompanyExecutivesList();
	dgvCompanyExecutives.Columns["CompanyName"].Visible = false;
	dgvCompanyExecutives.Columns["ExecutiveName"].Visible = false;
	// Get the List of Companies/Executives from the DAL and bind to Datagrid Dropdown columns
	List<Companies> companies = dal.GetCompanyList1();
	List<Executives> executive = dal.GetExecutivesList1();
				
        //Read each row in the Grid and determine what the ExecutiveType DropDown should be set to based on the ExecutiveTypeID 
	foreach (DataGridViewRow  row in dgvCompanyExecutives.Rows)
	{
	    DataGridViewComboBoxCell rowCompanyCombocell = (DataGridViewComboBoxCell)row.Cells["CompanyName1"];                    
	    rowCompanyCombocell.DataSource = companies;
	    rowCompanyCombocell.DisplayMember = "CompanyName";
	    rowCompanyCombocell.ValueMember = "CompanyID";
	    rowCompanyCombocell.Value = row.Cells["CompanyID"].Value;

	    DataGridViewComboBoxCell rowExecutiveCombocell = (DataGridViewComboBoxCell)row.Cells["ExecutiveName1"];
	    rowExecutiveCombocell.DataSource = executive;
	    rowExecutiveCombocell.DisplayMember = "ExecutiveName";
	    rowExecutiveCombocell.ValueMember = "ExecutiveID";
	    rowExecutiveCombocell.Value = row.Cells["ExecutiveID"].Value;
	    	
	    //set ID to value(1 or 2) from ExecutiveTypeID cell for that row
	    DataGridViewComboBoxCell rowExecTypeCombocell = (DataGridViewComboBoxCell)row.Cells["ExecutiveType"];
	    int ExecutiveTypeID = Convert.ToInt32(row.Cells["ExecutiveTypeID"].Value);
	    if (ExecutiveTypeID == 1)
	    	rowExecTypeCombocell.Value = "Director";   
	    else
		rowExecTypeCombocell.Value = "Secretary";	                
	    }

	    dgvCompanyExecutives.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
	    dgvCompanyExecutives.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
	}
  catch (Exception ex)
  {
    MessageBox.Show(string.Format("Exception occurred: {0}", ex.Message));
  }
}

private void btnSave_Click(object sender, EventArgs e)
{
  try
  {
    //Save object changes to the database, display a message, and refresh the form.
    dal.entities.SaveChanges();
    MessageBox.Show("Changes saved to the database.");
    this.Refresh();
  }
  catch (Exception ex)
  {
    MessageBox.Show(ex.Message);
  }
}