private void add_Activity_Click(object sender, EventArgs e)
{
var add = new AdditionalActivityData();
add.ShowDialog();
additionalActivityTableAdapter.Fill(schoolCourseDataSet.AdditionalActivity);
schoolCourseDataSet.AcceptChanges();
}
private void edit_Activity_Click(object sender, EventArgs e)
{
var ds = new SchoolCourseDataSet.AdditionalActivityDataTable();
additionalActivityTableAdapter.FillBy(ds, Convert.ToInt32(activityDataGridView.SelectedRows[0].Cells[0].Value));
object[] row = ds.Rows[0].ItemArray;
var edt = new AdditionalActivityData(Convert.ToInt32(row[0]),
row[1].ToString(),
Convert.ToDateTime(row[2]));
edt.ShowDialog();
additionalActivityTableAdapter.Fill(schoolCourseDataSet.AdditionalActivity);
schoolCourseDataSet.AcceptChanges();
}