private void buttonCountPassiveSponsors_Click(object sender, EventArgs e)
 {
     Sponsor.CountPassiveSponsors(_sqlConnection, dataGridViewFootballStatistics, labelSumOfPassiveSponsors);
 }
 private void buttonShowAllSponsors_Click(object sender, EventArgs e)
 {
     Sponsor.ShowAllSponsors(_sqlConnection, dataGridViewFootballStatistics);
 }
 private void buttonCalculateDonateAvarage_Click(object sender, EventArgs e)
 {
     Sponsor.AverageOfGrants(_sqlConnection, dataGridViewFootballStatistics, labelAverageOfGrants);
 }
 private void buttonSearchSponsorByName_Click(object sender, EventArgs e)
 {
     Sponsor.SearchSponsorByName(_sqlConnection, dataGridViewFootballStatistics, textBoxSponsorName.Text);
 }