//Отбор менеджеров по дате начала работы
 private void filterStartWorkDateBtn_Click(object sender, EventArgs e)
 {
     try
     {
         fullName.Text            = "";
         managersTable.DataSource = null;
         DBConnection.FilterStartWorkDate(date1.Value.ToString("yyyy-MM-dd"), date2.Value.ToString("yyyy-MM-dd"));
         managersTable.DataSource = DBConnection.dtManagers;
         if (DBConnection.dtManagers.Rows.Count > 0)
         {
             ReadManagersTableRow(0);
         }
     }
     catch (Exception ex)
     {
         exceptPanel.Visible = true;
         richTextBox1.Text   = ex.ToString();
     }
 }